CN104261536B - For quickly removing the efficient flocculant of heavy metal in water - Google Patents

For quickly removing the efficient flocculant of heavy metal in water Download PDF

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CN104261536B
CN104261536B CN201410506618.5A CN201410506618A CN104261536B CN 104261536 B CN104261536 B CN 104261536B CN 201410506618 A CN201410506618 A CN 201410506618A CN 104261536 B CN104261536 B CN 104261536B
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parts
flocculant
water
mixture
heavy metal
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CN104261536A (en
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董志刚
张伟锋
席北斗
赵颖
刘文芳
李晓光
郭祎阁
彭星
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You Jingtian (beijing) International Water Environment Research Center Co Ltd
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You Jingtian (beijing) International Water Environment Research Center Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007Contaminated open waterways, rivers, lakes or ponds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The present invention relates to a kind of for quickly removing the efficient flocculant of heavy metal in water, including mixture A and mixture B, described mixture A includes several components of following mass parts: 100 parts of Hanggin 2# soil, soil bacteria 5~10 parts, activated carbon 15~25 parts, and described mixture B includes several components of following mass parts: ferrum oxide 10~20 parts, iron chloride 10~20 parts, aluminium polychlorid 20~50 parts, organic flocculant 2.5~5 parts, cement 25~50 parts and sodium thiosulfate 16~32 parts.The present invention is used can fast and effeciently to remove the various heavy such as the hydrargyrum in water, lead, chromium, cadmium, arsenic, copper, response time is short, and do not produce secondary pollution, directly add without dissolving in advance, using method is simple, can be widely applied to the removal of heavy metal in various industrial wastewater, the subsoil water of pollution, lake, river, reservoir.

Description

For quickly removing the efficient flocculant of heavy metal in water
Technical field
The present invention relates to a kind of for industrial wastewater, polluted underground water, lake, river, the efficient water treatment flocculant of reservoir.
Background technology
China Water body weight rnetal contamination problem is the most prominent, and the pollution rate of river,lake and reservior substrate is up to 80.1%.The basin sheet of ten large watersheds such as the Yellow River, Huaihe River, Song Hua River, the Liaohe River, the pollution level of heavy metals exceeding standard section is V class;In bottom mud in Taihu Lake, total Cu, total Pb, total Cd content are in slight pollution level;In the main stream of Huangpu River surface deposit, Cd surpasses background value 2 times, Pb surpasses 1 times;In Suzhou River, Pb all exceeds standard, Cd be 75% exceed standard, Hg is 62.5% to exceed standard.Urban river has the section of 35.11% to occur that total Hg surpasses surface water III class water body standard, and the total Cd in section of 18.46% is more than III class water body standard, and the total Pb in section of 25% has the sample exceeded standard to occur.The heavy metal contaminants total amount carried into sea by rivers such as the Changjiang river, the Zhujiang River, the Yellow River is about 3.4 ten thousand tons, and the contamination hazard to ocean water body is huge.In the sample of whole nation immediate offshore area seawater sampling, the exceeding standard rate of Pb reaches 62.9%, and maximum surpasses a class sea water standard 49.0 times.The Cd content overproof of Dalian Bay 60% survey station deposit, the content of Communities of The Jinzhou Bay part survey station sewage draining exit Marine Sediment Around Cd, Pb is more than the 3rd class marine sediment quality standard.
In water, the removal technology of heavy metal mainly includes flocculation sediment, absorption, ion exchange, membrance separation etc. at present.Flocculent precipitation is one of important method removing Heavy Metals in Waters.Flocculation sediment technology is mainly by by system pH value regulation extremely a certain suitable scope, so that heavy metal ion can form the floccules such as solid hydroxide and settle out from water.In water, the method such as feeding lime stone, lime cream or NaOH is common flocculation precipitation method.
The shortcomings such as traditional flocculant mainly includes low molecule flocculant such as aluminium salt system, iron salt system, and that they exist, and flocculation sediment speed is slow, flco loosens is broken, medicine consumption is high;High polymer coagulant such as aluminum chloride hydrocarbon complex (PAC), aluminium polychlorid, bodied ferric sulfate etc., it is relatively costly, narrow application range, is easily affected by water temperature, pH value;PDDA such as polyacrylamide flocculants etc., have strong neurotoxicity and certain carcinogenecity, can produce macromolecule residual, destroy aqueous bio chain, and then have influence on human health when big weight polyacrylamide is used for processing waste water.Meanwhile, the mud dissolution heavy metal unstable, easy that traditional flocculant produces, sludge incineration not only can produce dioxin when processing, and owing to containing unstable heavy metal flying dust, air can be caused new pollution.
Summary of the invention
In order to overcome the drawbacks described above under prior art, it is an object of the invention to provide a kind of for quickly removing the efficient flocculant (abbreviation flocculant) of heavy metal in water, it is all high efficiency can to remove heavy metal in water in the range of 4-9 at pH value, heavy metal is fixed on inside mud, it is difficult to be dissolved, flco is firm the most broken and sedimentation velocity fast, can directly be added in water body during use, easy to operation.
The technical scheme is that
A kind of for quickly removing the efficient flocculant of heavy metal in water, including mixture A and mixture B, described mixture A includes several components of following mass parts: 100 parts of Hanggin 2# soil, soil bacteria 5~10 parts, activated carbon 15~25 parts, and described mixture B includes several components of following mass parts: ferrum oxide 10~20 parts, iron chloride 10~20 parts, aluminium polychlorid 20~50 parts, organic flocculant 2.5~5 parts, cement 25~50 parts and sodium thiosulfate 16~32 parts.
Described Hanggin 2# soil preferably employs granularity less than 74um, specific surface area 650-880m2The Hanggin 2# soil of/g.
Described Hanggin 2# soil preferably employs wherein Paligorskite content and is not less than the Hanggin 2# soil of 28.1%.
Described activated carbon is preferably the activated carbon of the finer grain obtained after 100 mesh sieve screenings.
Described cement can be any one or the mixture of the most multiple arbitrary proportion in Portland cement, alumina cement, pulverized fuel ash cement and the cement (abbreviation aluminous cement) prepared for main material with calcium aluminate.
Described organic flocculant can use PDDA.
Described soil bacteria can be any one or the combination of the most multiple arbitrary proportion in hay bacterium, bacillus, green pus bacterium.
Described can use following steps for quickly removing the preparation of the efficient flocculant of heavy metal in water: (1) will each component mix homogeneously of the described mixture A of composition by respective mass parts;(2) each component mix homogeneously of described mixture B will be formed by respective mass parts;(3) described mixture A and described mixture B is uniformly mixed to get powder mixture.
Described include at least one in hydrargyrum, lead, chromium, cadmium, arsenic, copper for quickly removing the removable heavy metal of efficient flocculant of heavy metal in water.
During use, under conditions of being sufficiently stirred for, the dosage in sewage is 4-6%, the heavy metal in flocks removes water.
The cardinal principle of the present invention is: first with aoxidizing, reduce, adsorb, settle/and dissolubility heavy metal ion changes into the particulate form form of solid phase by coprecipitated degradation method, then by flocculant, it precipitates from water removal.This flocculant is the flocculant of powder, need not before using dissolve, after being directly appended in sewage, the effect of soil bacteria therein carries out the decomposition of pollutant, then Hanggin 2# soil, activated carbon through adding are modified reaction to flco, carry out the curing reaction that flocculates subsequently under the cement added, sodium thiosulfate, ferrum oxide, aluminium polychlorid effect.The PDDA being added thereto is carrying out decomposing with modified-reaction when, little by little dissolve and start flocculation and curing reaction, furthermore it is also possible to add basic metal carbonate in flocculant, to promote neutralization and the flocculation reaction of the free acid in sewage.
The invention have the benefit that due to sodium thiosulfate, ferrum oxide, the synergism of the compositions such as aluminium polychlorid and Hanggin 2# soil, can be effectively by cadmium, chromium, hydrargyrum, lead, arsenic, nickel, zinc, copper, the heavy metal such as manganese and vanadium is acted on by physical absorption and chemisorbed etc., and form the flocks with good separation characteristic, the heavy metal class that can remove is many, removal effect is high, water outlet degree of purification is high, sludge condensation after separation and dehydration are easily, water content is low, be conducive to subsequent treatment, such as according to the experiment of applicant, sludge press filtration processes in technique, moisture percentage in sewage sludge before filter pressing is more than 90%, moisture percentage in sewage sludge after filter pressing is about 50%.
Detailed description of the invention
The invention provides a kind of for quickly removing the efficient flocculant of heavy metal in water, including mixture A and mixture B, described mixture A includes several components of following mass parts: 100 parts of Hanggin 2# soil, soil bacteria 5~10 parts, activated carbon 15~25 parts, and described mixture B includes several components of following mass parts: ferrum oxide 10~20 parts, iron chloride 10~20 parts, aluminium polychlorid 20~50 parts, organic flocculant 2.5~5 parts, cement 25~50 parts and sodium thiosulfate 16~32 parts.
Hanggin 2# soil is the clay mineral that a kind of natural particle size is relatively thin, specific surface area is bigger from Inner Mongolia Autonomous Region.Its main component is Paligorskite (attapulgite), clinochlore, illite, calcite, quartz, Anhydrite etc..Hanggin 2# soil has bigger specific surface area, it not only has the ability of good Adsorption of Heavy Metals, and himself is possibly together with lot of trace mineral element and rare earth, these trace quantity mineral elements all can react with the dissolved oxygen in waste water, dissociation acid ion in acidity, alkalescence, neutral environment, carry out aoxidizing, reduce and separating by heavy metal, produce hydrophobic flocculate solids, thus water is played purification.Heretofore described Hanggin 2# soil preferred size is less than 74um, specific surface area 650-880m2/ g, preferably Paligorskite content is not less than 28.1%.
Described activated carbon is preferably the activated carbon of the finer grain obtained after 100 mesh sieve screenings.Its specific surface area is big, and avtive spot is many, has the function of Adsorption heavy metal.
Described cement can be any one or the mixture of the most multiple arbitrary proportion in Portland cement, alumina cement, pulverized fuel ash cement and the cement prepared with calcium aluminate for main material.The adsorbable foul smell of cement and harmful substance, by the reaction of cement Yu water, can improve floc strength and density, improve the hydrophobicity of flco, significantly shorten the sedimentation time, reduce the moisture content of the mud precipitated, strengthen flocculating effect.
Described organic flocculant can use PDDA, it would however also be possible to employ other have the organic flocculant of similar performance.
Described soil bacteria can be any one or the combination of the most multiple arbitrary proportion in hay bacterium, bacillus, green pus bacterium.The physical and chemical processes such as they can be exchanged by ion, complexation, carrier transdermal delivery realize the removal of heavy metal in water.
Described sodium thiosulfate produces reaction with heavy metal, forms insoluble thiosulfuric acid metal compound.Pollutant are flocculated by ferrum oxide, preferable catalysis is played in modification, can dramatically speed up the speed of flocculation reaction, shorten the flocculation reaction time.Iron chloride is hydrated ferric oxide. flco at dissociation in water, has the effect that flocculation is removed to the pollutant in water, and is obviously improved the dewatering of flocculating effect and mud.Aluminium polychlorid is soluble in sewage, and dissociates into aluminium polychlorid and sulphuric acid, and aluminium polychlorid can change into the aluminium hydroxide of colloidal and the aluminium hydroxide of the aluminium hydroxide polycondensation of band ion.The aluminium hydroxide of this polycondensation can reduce the interionic current potential of float in sewage.Cause the balance between contaminant ion to be destroyed, produce micropartical.Micropartical can make the material of organic metal class inorganization, adsorbs and fixes heavy metal ion, thus produce new flocculation and separation.
Described can use following steps for quickly removing the preparation of the efficient flocculant of heavy metal in water: (1) will each component mix homogeneously of the described mixture A of composition by respective mass parts;(2) each component mix homogeneously of described mixture B will be formed by respective mass parts;(3) described mixture A and described mixture B is uniformly mixed to get powder mixture.Thus not only contribute to utilize the cooperation between different component to realize being sufficiently mixed, increase mixing efficiency and the uniformity, but also achieve the optimization of flocculant internal microstructure, and then further improve flocculant use characteristic and decolorizing effect, laboratory observation according to applicant, the decolorising agent prepared by above-mentioned substep is mixed together the product made relative to whole components, mixing it is easier in water when adding, and flocculation rate is faster, the flocks sheet formed is bigger, and the ability of heavy metal pollutant absorption and the degree of purification of water outlet are higher.
During use, the flocculant of the present invention need not dissolve in advance, can directly be added in sewage, and quick mixing speed is more than or equal to 300rpm, and quick mixing time is 5 minutes, it is not necessary to carries out low rate mixing, then rapid and natural sedimentation, and the time only needs 5 minutes.Described include at least one in hydrargyrum, lead, chromium, cadmium, arsenic, copper for quickly removing the removable heavy metal of efficient flocculant of heavy metal in water.
The flocculation reaction speed using the present invention is very fast, through quickly stirring 5 minutes, is then made without low rate mixing, and flco precipitates 5 minutes high density floccule bodys the most available and good separating effect.The hydrophobicity of the mud of flocculation separation is very strong, and state is the most stable, it is not easy to dispersion, re-dissolved.Meanwhile, the dehydration property of flocculation separation mud is very strong, and the abnormal smells from the patient of the mud after dehydration has reduced.Its soil property is modified as access expansion soil.Its contained heavy metal class material will not dissolution again.In mud, the organic putrefaction of residual also can be suppressed by soil bacteria, As time goes on, and can natural humification.Another advantage is that flocculant is made without dissolving, and directly just can add, use easily.
The following is several preparations of the present invention and the embodiment of heavy metals removal control experiment:
Embodiment 1:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 5kg, 15kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 10 kg, iron chloride 10 kg, aluminium polychlorid 20kg, organic flocculant (PDDA) 2.5kg, cement 25kg and sodium thiosulfate 16kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) chromic removal control experiment in water
Former water is trade effluent, in former water, chromic concentration is 2.5mg/L, under conditions of being sufficiently stirred for, the 5wt%(flocculant mass ratio relative to former water is added respectively in above-mentioned sewage, the flocculant of above-mentioned preparation the most together) and conventional flocculant PAC, after mixing through routine, flocculating, precipitate filtration, the detection method specified according to GB 8978-1996, record the chromic concentration of water outlet and be respectively 0.026mg/L, 2mg/L(.Cr VI aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB Chromic emission concentration standard 0.5mg/L in 8978-1996).
Embodiment 2:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 15kg, iron chloride 15kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 35kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) chromic removal control experiment in water
Former water is trade effluent, in former water, chromic concentration is 2.5mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 4wt% is added in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, records the chromic concentration of water outlet and is respectively 0.13mg/L, 2.0mg/L.Cr VI aqueous concentration after the flocculant of above-mentioned preparation processes is less than chromic emission concentration standard 0.5mg/L in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 3:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 5kg, 25kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 10kg, iron chloride 20kg, aluminium polychlorid 20kg, organic flocculant (PDDA) 2.5kg, cement 25kg and sodium thiosulfate 16kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of lead in water
Former water is trade effluent, in former water, the concentration of lead is 2.0mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 6wt% is added respectively in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet lead is respectively 0.10mg/L, 1.5mg/L.Lead aqueous concentration after the flocculant of above-mentioned preparation processes is less than the emission concentration standard 1.0mg/L of lead in " integrated wastewater discharge standard " (GB 8978-1996).
Embodiment 4:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 15 kg, iron chloride 15 kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 35kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of lead in water
Former water is trade effluent, in former water, the concentration of lead is 2mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet lead is respectively 0.05mg/L, 1.5mg/L.Lead aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 1.0mg/L of lead in 8978-1996).
Embodiment 5:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 10kg, 25kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 20 kg, iron chloride 20kg, aluminium polychlorid 50kg, organic flocculant (PDDA) 5kg, cement 50kg and sodium thiosulfate 32kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of arsenic in water
Former water is trade effluent, in former water, the concentration of arsenic is 2.0mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added respectively in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet arsenic is respectively 0.018mg/L, 1.6mg/L.Arsenic aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.5mg/L of arsenic in 8978-1996).
Embodiment 6:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 20kg, iron chloride 15kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 35kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of arsenic in water
Former water is trade effluent, in former water, the concentration of arsenic is 2.0mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 6wt% is added in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet arsenic is respectively 0.08mg/L, 1.6mg/L.Arsenic aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.5mg/L of arsenic in 8978-1996).
Embodiment 7:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 5kg, 15kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 10kg, iron chloride 10kg, aluminium polychlorid 20kg, organic flocculant (PDDA) 2.5kg, cement 25kg and sodium thiosulfate 16kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of hydrargyrum in water
Former water is trade effluent, in former water, the concentration of hydrargyrum is 0.5mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 4wt% is added respectively in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet hydrargyrum is respectively 0.026mg/L, 0.35mg/L.Hydrargyrum aqueous concentration after the flocculant of above-mentioned preparation is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.05mg/L of hydrargyrum in 8978-1996).
Embodiment 8:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 15kg, iron chloride 15kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 50kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of hydrargyrum in water
Former water is trade effluent, in former water, the concentration of hydrargyrum is 0.5mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet hydrargyrum is respectively 0.015mg/L, 0.35mg/L.Hydrargyrum aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.05mg/L of hydrargyrum in 8978-1996).
Embodiment 9:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 5kg, 15kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 10kg, iron chloride 10kg, aluminium polychlorid 20kg, organic flocculant (PDDA) 2.5kg, cement 25kg and sodium thiosulfate 16kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of cadmium in water
Former water is trade effluent, in former water, the concentration of cadmium is 1.5mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 6wt% is added respectively in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet cadmium is respectively 0.05mg/L, 0.9mg/L.Cadmium aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.1mg/L of cadmium in 8978-1996).
Embodiment 10:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 15kg, iron chloride 15kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 35kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of cadmium in water
Former water is trade effluent, in former water, the concentration of lead is 1.5mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet cadmium is respectively 0.03mg/L, 0.9mg/L.Cadmium aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.1mg/L of cadmium in 8978-1996).
Embodiment 11:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 5kg, 15kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 10kg, iron chloride 10kg, aluminium polychlorid 20kg, organic flocculant (PDDA) 2.5kg, cement 25kg and sodium thiosulfate 16kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of copper in water
Former water is trade effluent, in former water, the concentration of copper is 1.8mg/L, under conditions of being sufficiently stirred for, flocculant and the conventional flocculant PAC of the above-mentioned preparation of 5wt% is added respectively in above-mentioned sewage, mix through routine, flocculate, precipitate filtration after, the detection method specified according to GB 8978-1996, the concentration recording water outlet copper is respectively 0.03mg/L, 1.1mg/L.Copper aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.5mg/L of copper in 8978-1996).
Embodiment 12:
(1) preparation of flocculant
1) take Hanggin 2# soil 100kg, be added to the activated carbon of the soil bacteria of 8kg, 20kg, mix homogeneously, be configured to mixture A;
2) take ferrum oxide 15kg, iron chloride 15kg, aluminium polychlorid 35kg, organic flocculant (PDDA) 4kg, cement 35kg and sodium thiosulfate 24kg, mix homogeneously respectively, be configured to mixture B;
3) mixture A and mixture B is uniformly mixed i.e. it is configured to described flocculant.
(2) the removal control experiment of copper in water
Former water is trade effluent, in former water, the concentration of lead is 1.8mg/L, under conditions of being sufficiently stirred for, add in above-mentioned sewage, the flocculant of the above-mentioned preparation of 4.5wt% and conventional flocculant PAC, after mixing through routine, flocculating, precipitate filtration, the detection method specified according to GB 8978-1996, the concentration recording water outlet copper is respectively 0.02mg/L, 1.1mg/L.Copper aqueous concentration after the flocculant of above-mentioned preparation processes is less than " integrated wastewater discharge standard " (GB The emission concentration standard 0.5mg/L of copper in 8978-1996).
Under above-described embodiment, replacement experiment display through multiple concrete composition, described cement can use the most common cement or other adaptation cement, for example with Portland cement, alumina cement, any one or the mixture replacing of the most multiple arbitrary proportion in pulverized fuel ash cement and aluminous cement, identical or similar effect can be obtained, described PDDA can use other organic flocculants with identical or similar characterization of adsorption to substitute, identical or similar effect can be obtained, described soil bacteria uses hay bacterium, bacillus, in green pus bacterium any one or the most multiple, identical or similar effect can be obtained.
In any of the above-described embodiment, all can add the mixture a kind of raw material as mixture B of any one or the most several arbitrary proportion in sodium carbonate, calcium carbonate, magnesium carbonate and dolomite, after adding this composition, contribute to the reaction condition providing the most suitable for the composition that effectively flocculates in flocculant, improve the dewatering of flocculating effect and sewage sludge further.
According to applicant, the heavy metal related in the trade effluents such as paint, coating, accumulator, smelting, five metals, machinery, plating, cosmetics, hair dye and muffle painting dishes is processed, amount to 101 experiments, the flocculant of the present invention is when applied amount (flocculant is relative to the mass ratio of former water) is 4-5.5%, according to above-mentioned processing mode, the clearance of heavy metal pollutant is:
Chromium: 71-76%;
Cadmium: 83-89.5%;
Hydrargyrum: 79-83%;
Lead: 62-71%;
Arsenic: 88.5-92%;
Nickel: 86.5-90.5%;
Zinc: 72-78%;
Copper: 81-89%,
And all reach relative national standards.
According to identical mechanism, can deduce that the present invention is also adapted to the removal of other heavy metal contaminants equally.
nullThe present invention is used as the described soil bacteria of raw material and refers to that the soil bacteria goods containing this soil bacteria (refer to the compounding substances containing corresponding soils bacterium,Preferably in powdery),Can be using presently commercially available corresponding soils bacterium goods as the raw material preparing mixture A,Mixture A together it is mixed to form with other components of mixture A,Corresponding soil bacteria strain can also be extracted from the sewage sludge related to according to prior art,Or rely on other strains to originate,Cultivate according to normal fermentation or other suitable training methods prepare corresponding soil bacteria goods,For use as the corresponding raw material preparing mixture A,Generally,Viable bacteria content in soil bacteria goods is preferably no less than 10,000,000,000/g,The proportioning of soil bacteria of the present invention is based on having what above-mentioned viable bacteria content calculated,If the soil bacteria product content used in Shi Jian is less than above-mentioned content,Should be converted to that there is above-mentioned content (minimum content,I.e. 10,000,000,000/g) soil bacteria goods,To determine actual amount.

Claims (9)

1. the efficient flocculant of heavy metal in quickly removal water, it is characterized in that including mixture A and mixture B, described mixture A includes several components of following mass parts: native 100 parts of Hanggin 2#, soil bacteria 5~10 parts, activated carbon 15~25 parts, described mixture B includes several components of following mass parts: ferrum oxide 10~20 parts, iron chloride 10~20 parts, aluminium polychlorid 20~50 parts, organic flocculant 2.5~5 parts, cement 25~50 parts and sodium thiosulfate 16~32 parts, it uses following steps to prepare: (1) will form each component mix homogeneously of described mixture A by respective mass parts;(2) each component mix homogeneously of described mixture B will be formed by respective mass parts;(3) described mixture A and described mixture B is uniformly mixed to get powder mixture.
2. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that the granularity of described Hanggin 2# soil is less than 74um, specific surface area 650-880m2/g。
3. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described Hanggin 2# soil is the Hanggin 2# soil that wherein Paligorskite content is not less than 28.1%.
4. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described activated carbon is the activated carbon of the finer grain obtained after 100 mesh sieve screenings.
5. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described cement is any one or the mixture of the most multiple arbitrary proportion in Portland cement, alumina cement, pulverized fuel ash cement and the cement prepared with calcium aluminate for main material.
6. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described organic flocculant uses PDDA.
7. as claimed in claim 1 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described soil bacteria is any one or the combination of the most multiple arbitrary proportion in hay bacterium, bacillus, green pus bacterium.
8. in claim 1-7 as described in any one for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that described heavy metal includes at least one in hydrargyrum, lead, chromium, cadmium, arsenic, copper.
9. as claimed in claim 8 for quickly removing the efficient flocculant of heavy metal in water, it is characterised in that its using method is: under conditions of being sufficiently stirred for, and the dosage in sewage is mass percent 4-6%, the heavy metal in water is removed in flocculation.
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