CN107175065A - A kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method - Google Patents

A kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method Download PDF

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CN107175065A
CN107175065A CN201710314010.6A CN201710314010A CN107175065A CN 107175065 A CN107175065 A CN 107175065A CN 201710314010 A CN201710314010 A CN 201710314010A CN 107175065 A CN107175065 A CN 107175065A
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loess
leacheate
contaminated
mineral
organo
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CN107175065B (en
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范春辉
赖苗
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/12—Naturally occurring clays or bleaching earth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/306—Pesticides
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/36—Organic compounds containing halogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/40—Organic compounds containing sulfur

Abstract

The invention discloses a kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method, organic mineral complex is pressed into (10~40%) with loess iron-manganese concretion and loess clay mineral：(10~40%)：The mass ratio of (10~40%) is put into comminutor and granulated, and gypsum solution is added in granulation process, and adsorbent, which is made, is used for organic-inorganic Contaminated Loess leacheate of the adsorption treatment containing organic chlorine pyrazothion agricultural chemicals and inorganic heavy metal Pb/Cd.Solution detection wherein Pb, Cd concentration after present invention absorption, rear direct reuse up to standard, for agricultural drop irrigation, reaches the purpose of Chlorine in Solution pyrazothion agricultural chemicals and other nutrient recyclings in agricultural irrigation.Adsorbent after precipitation, centrifugation will carry out security landfill or he uses, such as auxiliary material of building the road, building auxiliary material etc..

Description

A kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method
Technical field
The invention belongs to loess organic-inorganic pollutant abatement technology field, and in particular to the pouring of repairing heavy metal pollution loess Wash the purifying treatment method of waste water, and the processing polluted to organic agricultural chemicals and the method for reuse.
Background technology
China's loess pollution situation loess pollution is broadly divided into heavy metal pollution, agricultural chemicals and Organic Pollution, radioactivity The polytypes such as pollution, pathogen contamination.Heavy metal is the main foreigner tourists of inorganic pollution, and because it is present in sludge, Large area soil is polluted in fertilizer, agricultural chemicals, municipal waste, mine residue and metallurgy industry.Most of heavy metals are known to be Carcinogen, and due to its non-degradable, persistently with the property of accumulation, serious threat may be caused to colony living.Chlorine pyrrole The broad spectrum pesticide of Liu Linshi Dow Chemicals company research and development, it has also become output and the larger main agriculture of usage amount in the world Medicine kind.Agricultural chemicals is the main organic pollution of loess, and the pesticide volume that the whole nation is used every year uses agricultural chemicals up to 500,000~600,000 t Land area in 2.8 hundred million more than hm2.Loess pollution type is various, show the old and new's pollutant and deposit, Inorganic whisker it is dirty The situation of dye.Loess pollution channel is more, and reason is complicated, and control difficulty is big.Loessial environment supervision and management system is unsound, and loess is dirty Dye prevents and treats insufficient investment, and whole society's preventing and treating consciousness is not strong.Loess pollution causes food quality constantly to decline China most cities Suburbs loess, which all receives different degrees of pollution, the weight such as cadmium, chromium, arsenic, lead in the foods such as many local grains, veterinary antibiotics Overrun metal content or close to critical value.Loess pollution can make pollutant accumulate and be enriched to by food chain in plant body Human and livestock health is endangered in human body and animal body and triggers cancer and other diseases etc..The agricultural product security problem frequently occurred in recent years With group canceration and malicious hair event so that loess pollution amelioration is extremely more urgent.
At present, the reparation of Contaminated Loess has a variety of sorting techniques, such as chemical remediation, peripheral doses, biological prosthetic.Chemistry is repaiied Multiple is exactly to put into modifying agent to loess, by the absorption of heavy metal, redox, antagonism or precipitation, to reduce a huge sum of money The biological effectiveness of category.Chemical remediation is carried out in loess in situ, simple and easy to apply.But it is not that a kind of permanent reparation is arranged Apply, because it only changes heavy metal form present in loess, metallic element is remained in loess, easy reactivation Endanger plant.Peripheral doses are as simple with earthing Technical comparing in diluted, and operate easily but can not remove loess pollutant, not thorough Bottom excludes the potential hazard of loess pollutant；Influence of the loess pollutant to food chain can only be suppressed, loess can not be reduced dirty Contaminate harm of the thing to other environment divisions such as underground water.The expense of these measures then depends on local traffic, cleaning Huang The source of soil and labor cost.Bioremediation technology is that have using poisonous in biological vital metabolic activity reduction loessial environment The concentration of evil thing enables it completely innoxious so that the loessial environment polluted is partially or even wholly returned to originally The process of state.Common practice is to dig out contaminated loess to be deposited in suitable temperature and battalion in ground progress microorganism Promotion microbial reproduction degradable organic pollutant reduces the purpose of pollution so as to reach under conditions of supporting material.It has the disadvantage pollution Thing may be migrated from loess, and processing time is longer.
Contaminated Loess elution technique is a kind of new method for repairing Contaminated Loess, is one kind biological prosthetic to Contaminated Loess Supplement, elution method mainly cleans loess using eluent, pollutant in loess is flowed out with eluent, then to eluent and Huang Soil carries out subsequent treatment, so as to reach the purpose for repairing Contaminated Loess, and is the processing once again for avoiding secondary pollution leacheate Very it is necessary, most of in terms of to leacheate processing at present is single processing heavy metal pollution or organic contamination, can not Heavy metal and organic agricultural chemicals pollution are handled simultaneously.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of organic-inorganic The processing of combined pollution loess leacheate and reuse method, not only consider that inorganic pollution further contemplates organic contamination for two dirts Dye takes measures to handle ring waste and can realize that secondary cycle is used.
The present invention uses following technical scheme：
A kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method, comprise the following steps：
S1, by Loess Samples and NaCl saturated aqueous solutions in mass ratio 1:3~4h is infiltrated after 4 mixing, in ultrasonic environment In disperse stirring mixed liquor is made, by the mixed liquor and pure water in mass ratio 1:4 mixing, supernatant is extracted after staticly settling Liquid, drying obtains soil clay particle level organic mineral complex；
S2, the remaining loess residues of step S1 are used after Adlerika, liquor zinci chloridi and pure water washing impurity elimination successively Loess Samples, remove loess organic matter and soluble-salt, then air-dry the sample after flushing, it is after sieving that screenings is levigate Dry, be kept in dark place standby, obtain loess iron-manganese concretion；
S3, by step S2 sieve after oversize add sodium carbonate liquor, Tu Heshui in mass ratio 1:10 are placed in ultrasonic wave Disperse 6~24h in oscillator, use H2O2The attachment on clay mineral surface is removed, loess clay is obtained after drying, grinding, sieving Mineral；
S4, the loess organic mineral complex, loess iron-manganese concretion and the loess clay for preparing step S1, S2 and S3 Mineral are placed in comminutor and granulated in proportion, and add gypsum solution in granulation process, and granulated sorbent, which is made, to be used at absorption Manage organic-inorganic contaminated soil leacheate.
It is preferred that, in step S1, in the ultrasound environments, 200ml pure water is added, ultrasonic power is 100w, time For 15~20min.
It is preferred that, described to staticly settle the time for 6~8h in step S1, drying temperature is 80~100 DEG C.
It is preferred that, in step S4, the quality hundred of the organic mineral complex, loess iron-manganese concretion and loess clay mineral Divide than being (10~40%)：(10~40%)：(10~40%).
It is preferred that, the granulation controls temperature to be room temperature~40 DEG C.
It is preferred that, in step S4, the concentration of the gypsum solution is 5~20%, is made up of gypsum and solvent.
It is preferred that, the solvent is gel solution, and 1 is pressed by flyash and sewage plant reclaimed water:After 5~20 ratio mixing Obtain.
It is preferred that, in step S4, the organic-inorganic contaminated soil leacheate type is loess contaminated soil after elution It is collected.
It is preferred that, the leached soil solutions are the solution that organic chlorine pyrazothion agricultural chemicals and inorganic heavy metal Pb/Cd pollute.
It is preferred that, in step S4, the granulated sorbent mesocomplex passes through oxidization-reduction by organic complex, tuberculosis Precipitation, clay are adsorbed by charge differences.
Compared with prior art, the present invention at least has the advantages that：
A kind of processing of organo-mineral complexing Contaminated Loess leacheate of the present invention and reuse method, by organo-mineral complexing Body is put in comminutor and granulated in proportion with loess iron-manganese concretion and loess clay mineral, it is easy to which adsorbent reclaims again sharp after absorption With from causing secondary pollution, and in granulation process addition gypsum solution, this adsorbent, which is made, is used for adsorption treatment organic-inorganic Contaminated Loess leacheate, non-secondary pollution it is with low cost it is easy to operate in the case of can remove simultaneously organic-inorganic succession and Removal effect is splendid, gypsum chemical property stabilization, fast solidifying, the smooth corner angle of hardened surface are clear, when drying it is not easy to crack, Porosity is easier to merge with adsorbent comprehensive engagement greatly during hardening, and these gypsum characteristics all cause adsorbent in recovery more Facilitate non-secondary pollution, strengthen mechanical performance, what the adsorption effect that three kinds of adsorbents of fusion improve single adsorption agent was limited lacks Point, adsorbent resource of three's fusion with the natural loess presence of effect and three kinds for strengthening adsorption function is more, cost is low, extract Facilitate it is easy to operate do not destroy ecology, leacheate conduct is recycled when every composition index reaches standard after leacheate is treated Plant loess nutrient solution is for irrigating, drip irrigation, and adsorbent will carry out security landfill after being used for multiple times after precipitation, centrifugation Or he uses, such as auxiliary material of building the road, building auxiliary material etc..
The present invention solves the contingency question that elution method now repairs Contaminated Loess by two steps, elution method is easy to operate, into This low instant effect, but ring waste causes the physics and chemistry attribute difference of secondary pollution, heavy metal and agricultural chemicals if handling not in time It is larger, cause the processing method of this two pollutant also different, the minimizing technology of heavy metal in water lead includes plant absorption Method, hyperfiltration, membrane separation process, chemical precipitation method etc., and the minimizing technology of chlorine pyrazothion includes electrolysis method, biodegradation Method, oxidizing process and vacuum distillation burning method etc., but these methods also respectively there are not enough place, such as plant absorption method and biology The edman degradation Edman cycle is longer and is difficult to control due to bioactivity；Membrane separation process and electrolysis method complex process, operation difficulty It is larger；Hyperfiltration and oxidizing process cost are higher, it is difficult to be widely applied；Chemical precipitation method and vacuum distillation burning method have two Secondary pollution risk, and these methods are the heavy metal or organic pollution in single processing leacheate, by contrast, are inhaled Attached method cost is relatively low, easy to operate, and security is good, has preferable removal effect for heavy metal and agricultural chemicals, and the present invention is pin To the pollution of organic-inorganic two and most leacheate is recycled at last.
Further, in the present invention loess organic mineral complex specific surface area is larger, pore structure abundant, active official Energy group is more, and it is a kind of " pure to possess as the inherent advantage what is more important loess organic mineral complex of Adsorption of Heavy Metals Loess " endogenous " adsorbent naturally ".Loess clay mineral has small granularity and complicated loose structure, and it has Gao Bibiao Area, this allows the strong physics with dissolving material, chemical interaction.These interactions are due to Coulomb repulsion, knot Crystalline substance and absorption or specific cationic exchange reaction.These properties of clay mineral are accumulated poisonous inorganic and had in its surface The all types of machine molecule.The pollutant in organic inorganic pollution leacheate is effectively adsorbed with this adsorbent, will be remaining after absorption Agricultural irrigation or drip irrigation are together carried out when detection content of beary metal is up to standard after solution is to be adsorbed, so as to reach agricultural chemicals chlorine pyrazothion Effective recycling.Triplicity and the granulated sorbent being made, why granulation is to be inhaled in adsorbent in comminutor It is attached to be easy to collect adsorbent.Adsorbent mesocomplex is mainly by organic complex, tuberculosis mainly by redox precipitation, viscous Native main adsorbed by charge differences is effectively adsorbed to Pb, Cd in leacheate and chlorine pyrazothion.
Further, the leacheate obtained after processing is used for agricultural irrigation or drip irrigation, the granulated sorbent solidification Security landfill or building materials auxiliary material, road-making material etc. after stabilisation.
Below by drawings and examples, technical scheme is described in further detail.
Brief description of the drawings
Fig. 1 is the PH contrast schematic diagrams of 1 three kinds of pollutants of the embodiment of the present invention；
Fig. 2 is temperature comparisons' schematic diagram of 2 three kinds of pollutants of the embodiment of the present invention；
Fig. 3 is the time contrast schematic diagram of 3 three kinds of pollutants of the embodiment of the present invention；
Fig. 4 is the concentration ratio contrast schematic diagram of 4 three kinds of pollutants of the embodiment of the present invention；
Fig. 5 is the solid-to-liquid ratio contrast schematic diagram of 5 three kinds of pollutants of the embodiment of the present invention；
Fig. 6 is the PH contrast schematic diagrams of 6 three kinds of pollutants of the embodiment of the present invention；
Fig. 7 is temperature comparisons' schematic diagram of 7 three kinds of pollutants of the embodiment of the present invention；
Fig. 8 is the time contrast schematic diagram of 8 three kinds of pollutants of the embodiment of the present invention；
Fig. 9 is the concentration ratio contrast schematic diagram of 9 three kinds of pollutants of the embodiment of the present invention；
Figure 10 is the flow velocity contrast schematic diagram of 10 3 kinds of pollutants of the embodiment of the present invention.
Embodiment
The invention provides a kind of processing of organo-mineral complexing Contaminated Loess leacheate and reuse method, loess is had Machine inorganic complex, loess iron-manganese concretion and loess clay mineral are put into comminutor and granulated, and gypsum is added in granulation process Solution, adsorbent, which is made, is used for organic-inorganic pollution of the adsorption treatment containing organic chlorine pyrazothion agricultural chemicals and inorganic heavy metal Pb/Cd The leacheate obtained after loess leacheate, processing is used to pacify after agricultural irrigation or drip irrigation, granulated sorbent solidification and stabilization Full landfill or building materials auxiliary material, road-making material etc..Non-secondary pollution it is with low cost it is easy to operate in the case of can remove simultaneously it is organic Inorganic pollution composition and removal effect is splendid.
Comprise the following steps that：
S1, by Loess Samples and NaCl saturated aqueous solutions in mass ratio 1:3~4h is infiltrated after 4 mixing, in ultrasonic environment In disperse stirring mixed liquor is made, by the mixed liquor and pure water in mass ratio 1:4 mixing, supernatant is extracted after staticly settling Liquid, drying obtains soil clay particle level organic mineral complex；
Wherein, in the ultrasound environments, 200ml pure water is added, ultrasonic power is 100w, and the time is 15~20min. Described to staticly settle the time for 6~8h, drying temperature is 80~100 DEG C.
S2, the remaining loess residues of step S1 are used after Adlerika, liquor zinci chloridi and pure water washing impurity elimination successively Loess Samples, remove loess organic matter and soluble-salt, then air-dry the sample after flushing, it is after sieving that screenings is levigate Dry, be kept in dark place standby, obtain loess iron-manganese concretion；
S3, by step S2 sieve after oversize add sodium carbonate liquor, Tu Shui ratios be 1:10, it is placed in ultrasonic oscillator In disperse 6~24h, H is used afterwards2O2The attachment on clay mineral surface is removed, loess clay pit is obtained after drying, grinding, sieving Thing；
S4, the loess organic mineral complex, loess iron-manganese concretion and the loess clay for preparing step S1, S2 and S3 Mineral are placed in comminutor and granulated in proportion, and strengthen its mechanicalness in granulation process addition gypsum solution, and granulated adsorbent is made Agent is used for adsorption treatment organic-inorganic contaminated soil leacheate.
Wherein, the organic mineral complex, loess iron-manganese concretion and loess clay mineral are pressed into (10~40%)：(10 ~40%)：The mass percent of (10~40%) is put into comminutor and granulated, and granulation controls temperature to be room temperature~40 DEG C.
In order to strengthen its mechanical performance, granulation process is mixed into the gypsum solution of concentration 5~20%, and wherein gypsum solution is by stone Cream and solvent are constituted, and solvent presses 1 by flyash and sewage plant reclaimed water:Gel solution is obtained after 5~20 ratio mixing.
Wherein, the effect of reclaimed water is to provide DOM, it is ensured that the homogenieity of gel solution, while strengthening the knot of heavy metal Close removal effect (DOM organically combines stable state with heavy metal formation)；
The acting as of gel solution and gypsum solution ensures granulated sorbent mechanical strength, is that bar is created in recycling Part.The mixing of three kinds of mineral is mechanism difference (the main organic complex of complex, the main oxygen of tuberculosis that three's heavy metal is removed Change precipitate reduction, clay majority charge differential attachment).
In step S4, the Contaminated Loess leacheate type is that loess Contaminated Loess is collected after elution；
It is preferred that, the loess leacheate is the molten of two pollutions of organic chlorine pyrazothion agricultural chemicals and inorganic heavy metal Pb/Cd Liquid；
In step S4, the granulated sorbent mesocomplex mainly by organic complex, tuberculosis mainly by peroxidating also Original precipitation, clay are mainly adsorbed by charge differences；
Described adsorption treatment be by beaker adsorption test and reaction column dynamic test, this adsorbent mechanical strength compared with It is good, and have very strong suction-operated to Pb, Cd, it is poor to other component adsorption effects, it is believed that to be a kind of obligate adsorbent.
Embodiment 1
Referring to Fig. 1, temperature be 25 DEG C, the concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is 5/5/ in leacheate 10mL/g, under the conditions of leacheate and the adsorbent that is made are respectively placed in 4 500ml beakers using liquid-solid ratio as 25, pH distinguishes For 5,6,7,8, it is stirred using speed as 20~80rpm so that adsorbent is fully contacted with solution.After it reacts 4 hours, Survey four beakers in three kinds of pollutants amount and try to achieve clearance, the data obtained Pb as shown in Figure 1 and Cd is gone with pH increase Except rate is in rising trend, in pH=8, Pb clearances are 84.43%, Cd clearance to the maximum and are 75.59% to the maximum；Chlorine pyrrole sulphur Phosphorus with pH increase clearance curve reached in undulating movement in pH=6 be to the maximum 30.64 clearances maximum when adsorption effect Most preferably.
Embodiment 2
Referring to Fig. 2, the concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is 5/5/10mL/ in pH=7, leacheate G, under the conditions of leacheate and the adsorbent that is made are respectively placed in 4 500ml beakers using liquid-solid ratio as 25, four beakers are divided Heating water bath is not carried out in 5 DEG C, 15 DEG C, 25 DEG C, 35 DEG C and be stirred using speed as 20~80rpm so that the same solution of adsorbent Fully contact.After its react 4 hours after, survey four beakers in three kinds of pollutants amount and try to achieve clearance, the data obtained such as Fig. 2 With the rising of temperature, still trend tends towards stability the increase of Pb clearances, and when temperature is 35 DEG C, Pb clearances, which reach, is to the maximum 83.59%；Cd clearance, which rises clearance with temperature and somewhat decreased, to be reached at 15 DEG C and is 71.25% to the maximum；Chlorine pyrrole Sulphur phosphorus in the slow ascendant trend also clearance at 35 DEG C is 30.01% to the maximum with the rising clearance of temperature, now adsorbs Best results.
Embodiment 3
Referring to Fig. 3, temperature be 25 DEG C, pH=7, in leacheate three kinds of pollutant Pb/Cd/ chlorine pyrazothions concentration ratio For 5/5/10mL/g, under the conditions of leacheate and the adsorbent that is made are respectively placed in 4 500ml beakers using liquid-solid ratio as 25, It is stirred using speed as 20~80rpm so that adsorbent is fully contacted with solution.Absorption is measured after 1h, 2h, 4h, 8h respectively The amount of pollutant and clearance is tried to achieve in leacheate afterwards, increased over time as shown in Figure 3, Pb clearances increase in 1h~2h Between increasing degree it is big, 2h~4h half interval contour ascendant trend is slightly delayed, and trend is gently basically unchanged between 4h~8h.Gone at 8h It is 82.68% to the maximum except rate reaches；It is big that Cd increases over time Cd clearances increase increasing degree between 1h~2h, and 2h~ 8h half interval contour ascendant trend is slightly delayed, and is reached at 8h and is 71.36% to the maximum；The clearance of chlorine pyrazothion increases in 1h with the time ~4h slowly increases, and faint reduction trend is presented during 4h~8h, and initial rate is 28.33% to the maximum and equally illustrated most at 4h Adsorption effect is best at big adsorption rate.
Embodiment 4
Referring to Fig. 4, temperature be 25 DEG C, pH=7, under the conditions of by leacheate and the adsorbent being made using liquid-solid ratio as 25 It is respectively placed in 4 500ml beakers, is stirred using speed as 20~80rpm so that adsorbent is fully contacted with solution.Setting The concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is respectively 5/5/10mL/g, 5/10/10mL/g, 10/5/ in leacheate 10mL/g, 10/10/10mL/g measure after absorption in leacheate the amount of pollutant after it reacts 4 hours and try to achieve clearance, such as When the clearance that the constant concentration with Cd of the ratio of Pb/ chlorine pyrazothions increases Pb and Cd is all substantially reduced shown in Fig. 4；Work as Cd/ The constant increase Pb and Cd with Pb concentration of the ratio of chlorine pyrazothion clearance is also into decline trend；Therefore therefore not concentration increases Plus clearance just increases, and optimal concentration ratio is 5/5/10mL/g, and now Pb clearance is 84.46%, Cd removals to the maximum It is optimal that rate is 70.25 absorption to the maximum.The clearance curve of chlorine pyrazothion is in that wave form is in concentration ratio with concentration ratio change Clearance, which reaches, under the conditions of 10/5/10mL/g is 10.23% to the maximum.
Embodiment 5
Referring to Fig. 5, temperature be 25 DEG C, pH=7, concentration ratio be by leacheate and to be made under the conditions of 5/5/10mL/g Adsorbent is respectively placed in 4 500ml beakers using liquid-solid ratio as 25,50,75,100, is stirred by 20~80rpm of speed So that adsorbent is fully contacted with solution, the amount of pollutant is measured after absorption in leacheate after it reacts 4 hours and is tried to achieve Except rate.As shown in Figure 5 as the clearance of three kinds of pollutants of increase of liquid-solid ratio is in be gradually reduced trend, in optimal liquid-solid ratio For 25 when, the maximum material removal rate of Pb/Cd/ chlorine pyrazothions is respectively 80.28%, 75.21%, 26.63.
Embodiment 6
Referring to Fig. 6, temperature be 25 DEG C, the concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is 5/5/ in leacheate Under the conditions of 10mL/g, flow velocity 5mL/min, four groups of reaction column experiments are carried out, pH is respectively set to examine after 5,6,7,8, question response 4h Survey the content of three kinds of pollutants in solution, as shown in Figure 6 with pH increase, Pb and the clearance of chlorine pyrazothion between 5~7pH In rising trend but clearance is reduced again between 7~8, Pb clearance maximum exists in pH=7 for 94.06 chlorine pyrazothions Clearance, which reaches, during pH=7 is 11.28 to the maximum；And Cd clearance is constantly in slow ascendant trend with pH increase, Clearance is 87.39 to the maximum during pH=8.
Embodiment 7
Referring to Fig. 7, the concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is 5/5/10mL/ in pH=7, leacheate Under the conditions of g, flow velocity 5mL/min, carry out four groups of reaction column experiments and heat respectively after 5 DEG C, 15 DEG C, 25 DEG C, 35 DEG C, question response 4h The content of three kinds of pollutants in solution is detected, as shown in Figure 7 as temperature rises, clearance somewhat drops between 5 DEG C~15 DEG C Harmonic curve is glided slightly, and maximum is reached when clearance between 15 DEG C~35 DEG C is gradually increasing at 25 DEG C.
Embodiment 8
Referring to Fig. 8, pH=7, temperature be 25 DEG C, in leacheate three kinds of pollutant Pb/Cd/ chlorine pyrazothions concentration ratio Under the conditions of 5/5/10mL/g, flow velocity 5mL/min, carry out four groups of reaction column experiments, four groups of reaction time be respectively set to 1h, 2h, 4h, 8h, the clearance for increasing over time three kinds of reactants are in rising trend, and maximum is reached in 8h, and Pb is 92.12%th, Cd is that 82.27%, chlorine pyrazothion is 12.25%, and now adsorption effect is optimal.
Embodiment 9
Referring to Fig. 9, being 25 DEG C, under the conditions of flow velocity 5mL/min in pH=7, temperature, four groups of reaction column experiments are carried out, will The concentration ratio of three kinds of pollutant Pb/Cd/ chlorine pyrazothions is respectively set to 5/5/10mL/g, 5/10/10mL/g, 10/ in leacheate After 5/10mL/g, 10/10/10mL/g, question response 4h detect solution in three kinds of pollutants content, acquired results as shown in figure 9, When i.e. concentration ratio is changed into the constant increase Cd of 5/10/10mL/g Pb and chlorine pyrazothion ratio concentration from 5/5/10mL/g, Now curve glides rapidly and amplitude is larger；When concentration ratio is changed into 10/5/10mL/g again, now Pb concentration one increases again And one times of reduction chlorine pyrazothion concentration value of Cd concentration is constant, clearance is still reduced but amplitude is slightly delayed；Last group is by three Concentration ratio is concentration increases of the 10/10/10mL/g with respect to previous group Cd, and clearance is still reduced, in this consideration concentration ratio In experiment, no matter increase or reduce the concentration of a certain pollutant, overall clearance is on a declining curve.It is 5/5/ in concentration ratio During 10mL/g, three kinds of pollutants removal rates all get maximum, and Pb is that 86.68%, Cd is 70.88%, and chlorine pyrazothion is 10.23%.
Embodiment 10
Referring to Fig. 10, pH=7, temperature be 25 DEG C, flow velocity 5mL/min, three kinds of pollutant Pb/Cd/ chlorine in leacheate The concentration ratio of pyrazothion be 5/5/10mL/g under the conditions of, by the flow velocity of four groups of parallel reaction column experiments be respectively set to 5mL/min, 10mL/min, 15mL/min, 20mL/min, after four groups of reaction column reaction 4h, collect respective solution and detect wherein three kinds respectively The content of pollution, as a result as shown in Figure 10 with the increase of flow velocity, the clearance of three kinds of pollutants is on a declining curve, in flow velocity Why reach maximum for 5mL/min clearances because the slow then pollutant of reaction column experimental flow rate could sufficiently connect with adsorbent Tactile adsorption effect reaches best, and now the clearance value of Pb/Cd/ chlorine pyrazothions is respectively 92.33%, 75.95%, 12.52%.
Further illustrate that adsorption process is entered in beaker and drop streaming continuous type reaction column respectively by above example OK.Solution detection wherein Pb, Cd concentration after absorption, rear direct reuse up to standard is in agricultural irrigation, for agricultural drop irrigation, reaches molten Chlorine pyrazothion agricultural chemicals and the purpose of other nutrient recyclings in liquid.Adsorbent after precipitation, centrifugation will be pacified Fill entirely or he uses, such as auxiliary material of building the road, building auxiliary material etc..

Claims (10)

1. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate, it is characterised in that including following step Suddenly：
S1, by Loess Samples and NaCl saturated aqueous solutions in mass ratio 1:3~4h is infiltrated after 4 mixing, is divided in ultrasonic environment Mixed liquor is made in scattered stirring, by the mixed liquor and pure water in mass ratio 1:4 mixing, extract supernatant after staticly settling, dry It is dry to obtain soil clay particle level organic mineral complex；
S2, the remaining loess residues of step S1 are used into the Huang after Adlerika, liquor zinci chloridi and pure water washing impurity elimination successively Earth sample, removes loess organic matter and soluble-salt, then air-dries the sample after flushing, after sieving that screenings is levigate dry It is dry, it is kept in dark place standby, obtains loess iron-manganese concretion；
S3, by step S2 sieve after oversize add sodium carbonate liquor, Tu Heshui in mass ratio 1:10 are placed in supersonic oscillations Disperse 6~24h in device, use H2O2The attachment on clay mineral surface is removed, loess clay pit is obtained after drying, grinding, sieving Thing；
S4, the loess organic mineral complex, loess iron-manganese concretion and the loess clay mineral for preparing step S1, S2 and S3 It is placed in comminutor and granulates in proportion, and gypsum solution is added in granulation process, granulated sorbent is made is had for adsorption treatment Machine inorganic pollution leached soil solutions.
2. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, in step S1, in the ultrasound environments, adds appropriate amount of purified water, ultrasonic power is 100w, the time is 15~ 20min。
3. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, described to staticly settle the time for 6~8h in step S1, drying temperature is 80~100 DEG C.
4. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, in step S4, the mass percent of the organic mineral complex, loess iron-manganese concretion and loess clay mineral is (10~40%)：(10~40%)：(10~40%).
5. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 4, its It is characterised by, the granulation controls temperature to be room temperature~40 DEG C.
6. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, in step S4, the concentration of the gypsum solution is 5~20%, is made up of gypsum and solvent.
7. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 6, its It is characterised by, the solvent is gel solution, 1 is pressed by flyash and sewage plant reclaimed water:Obtained after 5~20 ratio mixing.
8. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, in step S4, the organic-inorganic contaminated soil leacheate type is that loess contaminated soil is collected after elution.
9. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 8, its It is characterised by, the leached soil solutions are the solution that organic chlorine pyrazothion agricultural chemicals and inorganic heavy metal Pb/Cd pollute.
10. processing and the reuse method of a kind of organo-mineral complexing Contaminated Loess leacheate according to claim 1, its It is characterised by, in step S4, the granulated sorbent mesocomplex precipitated by organic complex, tuberculosis by oxidization-reduction, Clay is adsorbed by charge differences.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109174145A (en) * 2018-10-08 2019-01-11 陕西科技大学 A kind of dimolybdenum carbide/titanium dioxide composite photocatalyst and its preparation method and application
RU2683835C1 (en) * 2018-08-07 2019-04-02 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Method of wastewater treatment from heavy metal ions
RU2685673C1 (en) * 2018-08-07 2019-04-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Method of sewage treatment from heavy metal ions
WO2023077631A1 (en) * 2021-11-02 2023-05-11 浙江大学台州研究院 Method for treating heavy metal leaching wastewater by using multi-walled carbon nanotube cross-linked natural latex adsorbent

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103739033A (en) * 2013-12-27 2014-04-23 陕西科技大学 Method for removing chlorpyrifos from water body through adsorption of loess and clay minerals in dry farmland
CN103754973A (en) * 2013-12-30 2014-04-30 陕西科技大学 Method for treating chlorpyrifos wastewater by using loess organic/inorganic compound adsorbent
CN105170640A (en) * 2015-08-31 2015-12-23 陕西科技大学 Ecological method for in-situ passivating soil heavy mental without additional exterior component

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103739033A (en) * 2013-12-27 2014-04-23 陕西科技大学 Method for removing chlorpyrifos from water body through adsorption of loess and clay minerals in dry farmland
CN103754973A (en) * 2013-12-30 2014-04-30 陕西科技大学 Method for treating chlorpyrifos wastewater by using loess organic/inorganic compound adsorbent
CN105170640A (en) * 2015-08-31 2015-12-23 陕西科技大学 Ecological method for in-situ passivating soil heavy mental without additional exterior component

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2683835C1 (en) * 2018-08-07 2019-04-02 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Method of wastewater treatment from heavy metal ions
RU2685673C1 (en) * 2018-08-07 2019-04-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Петербургский государственный университет путей сообщения Императора Александра I" Method of sewage treatment from heavy metal ions
CN109174145A (en) * 2018-10-08 2019-01-11 陕西科技大学 A kind of dimolybdenum carbide/titanium dioxide composite photocatalyst and its preparation method and application
CN109174145B (en) * 2018-10-08 2021-04-20 陕西科技大学 Dimolybdenum carbide/titanium dioxide composite photocatalyst and preparation method and application thereof
WO2023077631A1 (en) * 2021-11-02 2023-05-11 浙江大学台州研究院 Method for treating heavy metal leaching wastewater by using multi-walled carbon nanotube cross-linked natural latex adsorbent

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