CN106622105A - Method for preparing phosphorus and heavy metal adsorbent from alkaline leaching excess sludge and application method of phosphorus and heavy metal adsorbent - Google Patents
Method for preparing phosphorus and heavy metal adsorbent from alkaline leaching excess sludge and application method of phosphorus and heavy metal adsorbent Download PDFInfo
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- CN106622105A CN106622105A CN201611025612.1A CN201611025612A CN106622105A CN 106622105 A CN106622105 A CN 106622105A CN 201611025612 A CN201611025612 A CN 201611025612A CN 106622105 A CN106622105 A CN 106622105A
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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
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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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
- B01J20/06—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
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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
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- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
- B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes
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- 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
- C02F2101/105—Phosphorus compounds
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- 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
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a method for preparing phosphorus and a heavy metal adsorbent from alkaline leaching excess sludge and an application method of the phosphorus and the heavy metal adsorbent, and belongs to the field of adsorption materials for sewage treatment. According to the method and the application method disclosed by the invention, the alkaline leaching excess sludge is modified by using a heat treatment method, an internal structure of the sludge is changed, the specific surface area of the sludge is increased, the sludge is enabled to have better adsorptive property, and removal of the phosphorus and heavy metal ion in wastewater can be realized; in addition, the overall adsorbing capacity is higher. The alkaline leaching excess sludge serving as a preparation raw material is industrial waste, and is large in discharge amount; recycling of industrial wastes is realized, and a new idea is provided for dealing with waste by waste. The method disclosed by the invention has the advantages of simple preparation process, lower production cost and convenience in popularization and application.
Description
Technical field
The invention belongs to sewage disposal sorbing material field, more particularly, it relates to one kind is prepared with alkali leaching excess sludge
The method and its application process of phosphorus and heavy metal absorbent.
Background technology
With developing rapidly for industrial or agricultural, all kinds of quantity of wastewater effluent containing heavy metal are continuously increased, and water pollution is more tight
Weight.Heavy metal has high causing toxicity, bioconcentration and non-biodegradable, if heavy metal pollution of water body problem cannot get and time control
System, it will cause heavy metal enrichment in vivo, as food chain is propagated, greatly harm is brought to health.Together
When, as a large amount of nitrogenous, sanitary wastewaters of phosphorus nutrition material and trade effluent enter natural water, water body eutrophication degree adds
Deep, algal bloom seriously destroys water ecological setting, and health and hydrobiological existence is brought huge
Big threat.
The common method of waste water dephosphorization and heavy metal is chemical precipitation method, bioanalysis and absorption method, and absorption method is due to operation
Simply, adsorption efficiency is high and the advantages of being capable of achieving the removal of heavy metal with double effects are reclaimed, is widely used in water body weight
The removal of metal ion and phosphorus.Active carbon from coal as the main commercial adsorbent for waste water dephosphorization and heavy metal, due to it
Price is higher, and reclaiming product is with high costs after adsorption saturation, therefore such adsorbent and adsorption method are more difficult in water process neck
Domain is able to large-scale application.
Alkali leaching excess sludge is the industrial residue that pickling sludge is produced after alkali soaking technology, and discharge capacity is big, belongs to industry
How discarded object, rationally and effectively process and be always a urgent problem using such discarded object.Alkali leaching is remaining dirty
Mud has typically viscous soil characteristics, includes the elements such as higher Na, Fe and Ca, with stronger ion exchange, and the dirt
Mud surface is in loose structure, with certain specific surface area, possesses the potential quality as adsorbent.The sludge is at alkali soaking technology
Still contain certain heavy metal lead and zinc after reason, before and after calcining heat treatment, the Leaching of heavy metal is satisfied by sludge《It is dangerous
Waste judging standard-leaching characteristic identification》(GB5085.3-2007) limit value is required.Root according to research reports, to red mud
(a kind of alkaline mine tailings produced in production alumina process, non-sludge) carries out calcining thermal activation treatment and can preferably lift it
Absorption property.By red mud in 600 DEG C of roasting 30min, when the addition of red mud is 500mg/L, it is to Cd2+、Zn2+And Cu2+'s
Eliminating rate of absorption up to 98% (mitsui petrochemical industry. Japanese Laid-Open Patent Publication：Showa 50-01 [P] .1975).Red mud is from aluminium
The industrial solid wastes discharged after aluminum oxide are refined in native ore deposit, wherein the al oxide component containing more content, alkali leaching residue
Sludge is mainly derived from and processes steel wire sludge acid cleaning process using alkaline leaching and produce the residual form material that excess sludge is obtained, and red
The generation source of mud is entirely different, containing oxides such as more ferriferous oxides and calcium, containing less with red mud component difference substantially
The composition such as aluminium, silicon.
Chinese patent application (application number 201510707753, Authorization Notice No. CN105251470A) discloses one kind to be used for
Process adsorbent of phosphorus and heavy metal and preparation method thereof.The adsorbent makes uniform mixing using iron salt solutions and lithium silica flour
Liquid, then adjusts pH standing separations and drying is prepared.Method preparation technology and operation are more complicated, relatively costly.It is Chinese special
Profit application (application number 201410089318.1, Authorization Notice No. CN103831080A) discloses a kind of for reclaiming weight in waste water
Nickel slag sorbing material of metal ion and preparation method thereof.The method is main with industrial waste nickel slag and analysis pure cerium hydroxide aluminium
Raw material, is obtained the nickel slag sorbing material of adsorption recovery heavy metal, the material after preprocessed, compressing, calcining and hydro-thermal process
Material has the features such as porosity is high, specific surface area is big, to Pb2+、Cu2+There is good absorption property etc. heavy metal ion.But
It is that the preparation method of the sorbing material is cumbersome, process is complicated, relatively costly.
The content of the invention
1. the problem to be solved
Have that preparation cost is higher, in the environment action effect is unstable, be also easy to produce secondary dirt for existing adsorbent
The problems such as dye, an object of the present invention is to provide one kind alkali leaching excess sludge and prepares phosphorus and heavy metal absorbent, is soaked with alkali
Excess sludge is dried according to removal of impurities, washing, grinding is sieved, be heat-treated the step such as modified prepares, and changes the inside of sludge
Structure, increases its specific surface area so as to more preferable absorption property.
There is a problem of that preparation cost is higher for existing adsorbent, it is a further object of the present invention to provide a kind of easy
Preparation method, sludge is carried out into high-temperature calcination heat treatment, the aperture of alkali leaching excess sludge becomes big, and microcellular structure further increases
Plus, improve the porosity and specific surface area of adsorbent.
Present invention also offers the application process of the adsorbent, for the removal of heavy metal ion in water, with abundant absorption
The species of agent simultaneously reduces the production cost of adsorbent, while realizing that recycling industrial waste alkaloids soak the mesh of excess sludge
Mark.
2. technical scheme
In order to solve the above problems, the technical solution adopted in the present invention is as follows：
A kind of alkali soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, comprises the following steps：
(1) alkali leaching excess sludge is added to the water and is stirred and evenly mixed, after centrifugation removal of impurities sludge is reclaimed；
(2) sludge processed through step (1) is washed to into eluate in neutrality, then drying sludge is processed into laggard
Row grinding is sieved；
(3) under the conditions of 400～600 DEG C, the sludge that will be processed through step (2) calcines 1-2h, obtains described suction
Attached dose.
Preferably, mixing speed is 100-300r/min, duration 10-20min in the step (1).
Preferably, baking temperature is 100～105 DEG C in the step (2), and drying time is 3～5h；Mistake after sludge grinding
80～200 mesh sieves.
Preferably, when the step (3) is calcined, when being warming up to beginning timing calcining after predetermined temperature with 10 DEG C/min speed
Between.
The adsorbent of a kind of phosphorus and heavy metal, is prepared by alkali leaching excess sludge according to above-mentioned method.
Above-mentioned phosphorus and heavy metal absorbent are used for the method for processing waste water, and its step is：Wastewater pH is adjusted to 3～7, plus
Enter above-mentioned adsorbent, 1～2h is vibrated under the conditions of 20～40 DEG C.
The adsorbent of the present invention is used for into the removal of heavy metal ion in water, step is as follows：Taking 30～50mL, concentration is
In 100mL conical flasks, pH is 3～7 to 100～300mg/L heavy metal ion solution, and 0.2～1g adsorbents are added in solution,
1～2h is vibrated in the thermostatic control oscillator vibration of 20～40 DEG C of temperature, supernatant is taken, using ICP-AES heavy metal concentration is determined,
According to the initial concentration C of heavy metal ion in solution0With heavy metal ions concentration in solution C after absorptioneCalculate the absorption of heavy metal
Clearance.
The adsorbent of the present invention is used for into the removal of phosphorus in water, step is as follows：Take 30～50mL, content to contain for 1～6mg/L
In 100mL conical flasks, pH is 3～7 to phosphorus solution, 0.2～1g adsorbents is added in solution, in the constant temperature of 20～40 DEG C of temperature
1～2h is vibrated in water bath chader, take supernatant, using spectrophotometry phosphorus content, initially contained according to phosphorus in solution
Amount C0With phosphorus content C in solution after absorptioneCalculate the eliminating rate of absorption of phosphorus.
Preferably, the ratio of adsorbent and waste water is 1:(30～50).
Preferably, heavy metal ion Pb is contained in waste water2+、Zn2+Or Cu2+。
The principle of the present invention：Alkali leaching excess sludge inside has more pore structure, using the teaching of the invention it is possible to provide enough activity
Adsorption site, the sludge is carried out after high-temperature calcination heat treatment, and the most of crystallization water and constitution water inside sludge is removed, and makes
Obtain its crystal structure to be destroyed, skeleton structure occurs significantly change, therefore, the aperture change of adsorbent is big, and microcellular structure enters one
Step increases, and the porosity and specific surface area of adsorbent is improve, with preferable absorption property.Further, as absorption is held
The increase of amount and the enhancing of reactivity, the mud adsorbent heavy metal ion and phosphorus have preferable Adsorption ability.
A kind of alkali soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, and adsorbent obtained above is used to give up
The absorption of phosphorus and heavy metal in water is fixed, can effectively solving phosphor in sewage and heavy metal pollution problem, be a kind of excellent suction
Enclosure material.
3. beneficial effect
Compared to prior art, beneficial effects of the present invention are：
(1) using the modified alkali leaching excess sludge of heat-treating methods, the specific treatment conditions of the present invention are changed the present invention
The internal structure of sludge, increases its specific surface area so as to more preferable absorption property；
(2) adsorbent of the invention can realize the removal to Phosphorus From Wastewater and heavy metal ion, and overall adsorption amount compared with
Height, to there is important practical significance with the improvement of phosphorus-containing wastewater and the improvement of water environment containing heavy metal containing sewage；
(3) the method for the invention process is simple, production cost is less expensive, easy to utilize；
(4) preparing raw material alkali of the invention leaching excess sludge is trade waste, and discharge capacity is big, realizes trade waste
Recycling, provide new approaches for the treatment of wastes with processes of wastes against one another.
Description of the drawings
Fig. 1 is the schematic flow sheet that phosphorus and heavy metal high-efficiency adsorbent are prepared in the present invention.
Specific embodiment
By the following examples to dephosphorization of the present invention and the preparation method and applications of the adsorbent of heavy metal ion
It is described further, but protection scope of the present invention is not limited to embodiment.
Alkali leaching excess sludge used by example below contains the elements such as substantial amounts of Na, Fe and Ca, with general clay
Fundamental characteristics.Described lead waste water is with AR Pb (NO3)2Be configured to the lead storing solution of 500mg/L, using go from
Sub- water is diluted to after prescribed concentration and uses；Described zinc-containing water is to use AR ZnSO4·7H2O is configured to 500mg/L
Zinc storing solution, be diluted to after prescribed concentration using deionized water and used；Described waste water containing Cu is to use AR Cu
(NO3)2.2H2O is configured to the zinc storing solution of 500mg/L, is diluted to after prescribed concentration using deionized water and is used；Described is phosphorous
Waste water is to use AR KH2PO410mg/L phosphorus storing solutions are configured to, are diluted to after prescribed concentration using deionized water and are used.
Embodiment 1
As shown in figure 1, a kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its
Preparation method comprises the steps：
(1) alkali leaching excess sludge is added in deionized water, the uniform stirring 20min under the rotating speed of 200r/min, at a high speed
Sludge is reclaimed after centrifugation removal of impurities；
(2) sludge processed through step (1) is washed to into eluate in neutrality, and is placed on 100 DEG C and be dried 5h,
Then by ground 100 mesh sieve of sludge after dried process；
(3) temperature programming stove starts timing after being warming up to 400 DEG C with 10 DEG C/min speed, to processing through step (2)
The sludge crossed carries out calcining 1h, and obtained adsorbent is preserved under hermetically drying environment.
Lead, zinc, copper three that the adsorbent prepared in 1g the present embodiment is placed in 50mL, 100mg/L is containing concentration are taken respectively
During waste water and 50mL, the concentration of heavy metal species ion are for the phosphorus-containing wastewater of 5mg/L, pH value of waste water is 5, in 20 DEG C of water bath with thermostatic control
2h is vibrated in oscillator, supernatant is taken and is surveyed its heavy metal concentration and phosphorus content, calculate clearance.Adsorption effect shows, this enforcement
The adsorbent prepared in example is respectively 85.1%, 88.3% and 90.2% to the clearance of lead, zinc, the heavy metal species ion of copper three,
The eliminating rate of absorption for aligning phosphate radical is 92.6%, and compared to other sorbing materials, the adsorbent can simultaneously realize heavy metal
The efficient removal of lead, zinc and copper and phosphorus.
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge of the present invention is asked while solving two
Topic：
1. it is heat-treated modified alkali leaching excess sludge and high-efficiency adsorbent is obtained, controls with heavy metal ion-containing waste water for phosphorous
Reason, can in effectively solving stain disease phosphorus and heavy metal pollution problem.
2. alkali leaching excess sludge for maximum discharge amount trade waste, be used as sorbing material process it is phosphorous and containing a huge sum of money
Category waste water, the treatment of wastes with processes of wastes against one another realizes the purpose of recycling trade waste.
Embodiment 2
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its preparation method bag
Include following steps：
(1) essentially identical with the step of embodiment 1 (1), except for the difference that mixing speed is 100r/min, duration 15min；
(2) essentially identical with the step of embodiment 1 (2), except for the difference that baking temperature is 105 DEG C, and drying time is 3h；Sludge
200 mesh sieves are crossed after grinding；
(3) temperature programming stove starts timing after being warming up to 500 DEG C with 10 DEG C/min speed, will process through step (2)
Sludge calcining 2h, obtained adsorbent is preserved under hermetically drying environment.
Lead, zinc, copper that the adsorbent prepared in 0.5g the present embodiment is placed in 30mL, 300mg/L is containing concentration are taken respectively
During the waste water and 30mL, concentration of three heavy metal species ions is for the phosphorus-containing wastewater of 6mg/L, pH value of waste water is 7, in 30 DEG C of thermostatted water
1h is vibrated in bath oscillator, supernatant is taken and is surveyed its heavy metal concentration and phosphorus content, calculate clearance.Adsorption effect shows, this reality
Apply the adsorbent prepared in example and 87.5%, 89.8% and is respectively to the clearance of lead, zinc, the heavy metal species ion of copper three
93.3%, the eliminating rate of absorption for aligning phosphate radical is 94.5%.Compared to other sorbing materials, it is right that the adsorbent can be realized simultaneously
The efficient removal of heavy metal lead, zinc and copper and phosphorus.
Embodiment 3
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its preparation method bag
Include following steps：
(1) essentially identical with the step of embodiment 1 (1), except for the difference that mixing speed is 300r/min, duration 10min；
(2) essentially identical with the step of embodiment 1 (2), except for the difference that baking temperature is 105 DEG C, and drying time is 4h；Sludge
80 mesh sieves are crossed after grinding；
(3) temperature programming stove starts timing after being warming up to 600 DEG C with 10 DEG C/min speed, will process through step (2)
Sludge calcining 1h, obtained adsorbent is preserved under hermetically drying environment.
Lead, zinc, copper three that the adsorbent prepared in 1g the present embodiment is placed in 40mL, 200mg/L is containing concentration are taken respectively
During waste water and 40mL, the concentration of heavy metal species ion are for the phosphorus-containing wastewater of 1mg/L, pH value of waste water is 3, in 20 DEG C of thermostatted water
2h is vibrated in bath oscillator, supernatant is taken and is surveyed its heavy metal concentration and phosphorus content, calculate clearance.Adsorption effect shows, this reality
Apply the adsorbent prepared in example and 90.2%, 90.8% and is respectively to the clearance of lead, zinc, the heavy metal species ion of copper three
98.6%, the eliminating rate of absorption for aligning phosphate radical is 98.9%.Compared to other sorbing materials, it is right that the adsorbent can be realized simultaneously
The efficient removal of heavy metal lead, zinc and copper and phosphorus.
Embodiment 4
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its preparation method bag
Include following steps：
(1) it is identical with the step of embodiment 1 (1)；
(2) it is identical with the step of embodiment 1 (2)；
(3) under the conditions of 500 DEG C, the sludge that will be processed through step (2) calcines 2h, preserves under hermetically drying environment
Obtained adsorbent.
Lead, zinc, copper that the adsorbent prepared in 0.5g the present embodiment is placed in 50mL, 100mg/L is containing concentration are taken respectively
During the waste water and 50mL, concentration of three heavy metal species ions is for the phosphorus-containing wastewater of 5mg/L, shake in 20 DEG C of thermostatic control oscillator vibration
2h is swung, supernatant is taken and is surveyed its heavy metal concentration and phosphorus content, calculate clearance.Adsorption effect shows, prepares in the present embodiment
Adsorbent is respectively 92.5%, 92.3% and 99.5% to the clearance of lead, zinc, the heavy metal species ion of copper three, aligns phosphate radical
Eliminating rate of absorption be 99.7%.Compared to other sorbing materials, the adsorbent can simultaneously realize heavy metal lead, zinc and copper with
And the efficient removal of phosphorus.
Embodiment 5
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its preparation method bag
Include following steps：
(1) it is identical with the step of embodiment 1 (1)；
(2) it is identical with the step of embodiment 1 (2)；
(3) under the conditions of 600 DEG C, the sludge that will be processed through step (2) calcines 1h, preserves under hermetically drying environment
Obtained adsorbent.
Lead, zinc, copper three that the adsorbent prepared in 1g the present embodiment is placed in 50mL, 100mg/L is containing concentration are taken respectively
During waste water and 50mL, the concentration of heavy metal species ion are for the phosphorus-containing wastewater of 5mg/L, vibrate in 20 DEG C of thermostatic control oscillator vibration
2h, takes supernatant and surveys its heavy metal concentration and phosphorus content, calculates clearance.Adsorption effect shows, the suction prepared in the present embodiment
The attached dose of clearance to lead, zinc, the heavy metal species ion of copper three is respectively 90.6%, 89.8% and 96.5%, aligns phosphate radical
Eliminating rate of absorption is 96.6%.Compared to other sorbing materials, the adsorbent can realize simultaneously heavy metal lead, zinc and copper and
The efficient removal of phosphorus.
Embodiment 6
A kind of method for preparing phosphorus and heavy metal absorbent with alkali leaching excess sludge that the present invention is provided, its preparation method bag
Include following steps：
(1) it is identical with the step of embodiment 1 (1)；
(2) it is identical with the step of embodiment 1 (2)；
(3) under the conditions of 600 DEG C, the sludge that will be processed through step (2) calcines 2h, preserves under hermetically drying environment
Obtained adsorbent.
Lead, zinc, copper that the adsorbent prepared in 0.4g the present embodiment is placed in 50mL, 100mg/L is containing concentration are taken respectively
During the waste water and 50mL, concentration of three heavy metal species ions is for the phosphorus-containing wastewater of 5mg/L, shake in 20 DEG C of thermostatic control oscillator vibration
2h is swung, supernatant is taken and is surveyed its heavy metal concentration and phosphorus content, calculate clearance.Adsorption effect shows, prepares in the present embodiment
Adsorbent is respectively 86.4%, 85.2% and 88.2% to the clearance of lead, zinc, the heavy metal species ion of copper three, aligns phosphate radical
Eliminating rate of absorption be 89.7%.Compared to other sorbing materials, the adsorbent can simultaneously realize heavy metal lead, zinc and copper with
And the efficient removal of phosphorus.
Below schematically to the present invention and embodiments thereof be described, the description does not have restricted, so, if
One of ordinary skill in the art is enlightened by it, in the case of without departing from the invention objective, without creative design
Go out the preparation method and embodiment similar to the technical scheme, protection scope of the present invention all should be belonged to.
Claims (8)
1. a kind of alkali soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, comprises the following steps：
(1) alkali leaching excess sludge is added to the water and is stirred and evenly mixed, after centrifugation removal of impurities sludge is reclaimed；
(2) sludge processed through step (1) is washed to into eluate in neutrality, is ground after then drying sludge is processed
Honed sieve；
(3) under the conditions of 400～600 DEG C, the sludge that will be processed through step (2) calcines 1-2h, obtains described adsorbent.
2. a kind of alkali according to claim 1 soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, its feature
It is：Mixing speed is 100-300r/min, duration 10-20min in the step (1).
3. a kind of alkali according to claim 1 soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, its feature
It is：Baking temperature is 100～105 DEG C in the step (2), and drying time is 3～5h；80～200 mesh are crossed after sludge grinding
Sieve.
4. a kind of alkali according to claim 1 soaks the method that excess sludge prepares phosphorus and heavy metal absorbent, its feature
It is：When the step (3) is calcined, beginning timing calcination time after predetermined temperature is warming up to 10 DEG C/min speed.
5. the adsorbent of a kind of phosphorus and heavy metal, it is characterised in that：Excess sludge is soaked according to the side described in claim 1 by alkali
Method is prepared.
6. phosphorus described in claim 5 and heavy metal absorbent are used for the method for processing waste water, and its step is：Wastewater pH is adjusted
To 3～7, the adsorbent described in claim 5 is added, 1～2h is vibrated under the conditions of 20～40 DEG C.
7. phosphorus according to claim 6 and heavy metal absorbent are used for the method for processing waste water, it is characterised in that：Adsorbent
It is 1 with the ratio of waste water:(30～50).
8. phosphorus according to claim 6 and heavy metal absorbent are used for the method for processing waste water, it is characterised in that：In waste water
Containing heavy metal ion Pb2+、Zn2+Or Cu2+。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025612.1A CN106622105A (en) | 2016-11-22 | 2016-11-22 | Method for preparing phosphorus and heavy metal adsorbent from alkaline leaching excess sludge and application method of phosphorus and heavy metal adsorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611025612.1A CN106622105A (en) | 2016-11-22 | 2016-11-22 | Method for preparing phosphorus and heavy metal adsorbent from alkaline leaching excess sludge and application method of phosphorus and heavy metal adsorbent |
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| CN110104821A (en) * | 2019-04-15 | 2019-08-09 | 杭州师范大学 | A kind of municipal sewage phosphorus ligands and recovery method |
| CN111039345A (en) * | 2020-01-06 | 2020-04-21 | 北京科技大学 | High-added-value resource utilization method of oil sludge pyrolysis slag |
| CN113083216A (en) * | 2021-04-23 | 2021-07-09 | 江苏大学 | Two-dimensional nickel-based composite metal oxide adsorbent, preparation method and application for removing phosphate radical |
| CN115739019A (en) * | 2022-11-17 | 2023-03-07 | 武汉大学 | Functionalized biochar based on high-toxicity excess sludge, and preparation method and application thereof |
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| CN115739019A (en) * | 2022-11-17 | 2023-03-07 | 武汉大学 | Functionalized biochar based on high-toxicity excess sludge, and preparation method and application thereof |
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Application publication date: 20170510 |