CN107417004A - A kind of method of advanced treating acid waste water containing thallium - Google Patents

A kind of method of advanced treating acid waste water containing thallium Download PDF

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Publication number
CN107417004A
CN107417004A CN201710358414.5A CN201710358414A CN107417004A CN 107417004 A CN107417004 A CN 107417004A CN 201710358414 A CN201710358414 A CN 201710358414A CN 107417004 A CN107417004 A CN 107417004A
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China
Prior art keywords
waste water
thallium
advanced treating
solution
solid
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CN201710358414.5A
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Inventor
刘晨明
林晓
潘尹银
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Beijing Zhongke Environment Science And Technology Research Institute Co Ltd
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Beijing Zhongke Environment Science And Technology Research Institute Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C02F1/5245Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

The invention discloses a kind of method of advanced treating acid waste water containing thallium, this method is by after the neutralized precipitation of the waste water, advanced treating is carried out again, pH nertralizers are added to waste water, pH is adjusted to neutrality, adds precipitating reagent, then carry out separation of solid and liquid, supernatant carries out advanced treating after separation of solid and liquid, directly outer can be arranged after being filtered after processing;The present invention can effectively remove the heavy metal thallium in waste water, not only technological process is simple for this method by that alkali neutralization precipitation and advanced treating will be added to be combined, it is easy to operate, non-secondary pollution produces, the μ g/L of and thallium content in processed waste water≤0.1, can be back to production technology or directly outer arrange.

Description

A kind of method of advanced treating acid waste water containing thallium
Technical field
The present invention relates to the deep treatment method of field of industrial waste water treatment, more particularly to a kind of acid waste water containing thallium.
Background technology
Thallium(Tl)Belong to association in the metal sulfide such as rare and scatter element, Chang Tie, zinc, copper in the earth's crust, also with organic matter knot Conjunction form is present in coalfield and oil.The bio-toxicity of high intensity is presented in thallium and its compound, to the toxicity of mammal It is even stronger than heavy metals such as lead, mercury, easily accumulate in vivo, the exposure of human body excess can cause nervous system, digestive system, skin The permanent poisoning injury such as skin, hair.
In recent years, due to there occurs a lot of events about thallium poisoning, promoting State Environmental Protection Administration that thallium is included in into ring Border priority pollutant blacklist, and《Water environment quality standard》(GB 3838-2002)In in water quality thallium standard limit Value makes clear stipulaties, it is desirable to centralized Drinking Water earth surface water source in water body the concentration of thallium must not be higher than 0.1 μ g/L(Draw It is 0.5 μ g/L to play poisoning concentration).
The a large amount of heavy metal containing thallium is produced in the production process of gold hydrometallurgy, lead-zinc smelting and related Mineral Processing Enterprises Waste water.Found according to Field Research, waste water containing thallium is mainly derived from gold hydrometallurgy production process, gold wet smelting process All containing various heavies such as thalliums, it is former for caused 4 kinds of typical waste water, such as waste acid, raffinate, lean solution containing cyanogen and smart smelting waste water Tl contents in water are more than every liter tens to several hectogammas, or even a kilogamma.
The method of processing waste water containing thallium mainly has ion-exchange, extraction, natural evaporation method and chemistry to sink at present at present Shallow lake method, but be difficult to handle thallium element in waste water to below 0.1 μ g/L, still cause efflux wastewater severe overweight, and earth's surface Water(Cross section of river)Thallium pollution problem water hygiene is constituted a serious threat safely.
The processing method for the waste water containing thallium that patent CN1067229A is related to, it is that waste water is first adjusted into pH to 2~5, then uses oxygen Monovalence thallium is oxidized to trivalent thallium by agent, adds coprecipitator, generation thallium hydroxide precipitation, this method can only be by the thallium in waste water Element is down to 0.05mg/L, it is difficult to meets newest environmental requirement, poor processing effect, processed waste water can not be discharged directly, be needed Want further advanced treating.
Patent CN104773863A is related to a kind of process for deeper purifying of waste water containing thallium, and waste water containing thallium first adds excess Monovalence thallium is oxidized to trivalent thallium by oxidant, then wastewater pH is adjusted to 7~13, and separation of solid and liquid obtains supernatant, adds reduction Adsorption treatment is carried out after agent again, this method can be handled thallium content in waste water to 0.1 μ g/L, high treating effect, but work be present The shortcomings of skill flow is complicated, reagent cost is high, capital expenditure cost is big, treatment effect is unstable.
The content of the invention
In view of the shortcomings of the prior art, in order to solve the existing processing in the advanced treatment process of acid waste water containing thallium it is not up to standard with And the problems such as processing technological flow complexity, the present invention propose one kind by adding alkali neutralization precipitation and advanced treating United Technologies to locate Acid waste water containing thallium is managed, with optimizing process, processing cost, the toxicity of reduction waste water is saved, realizes the depth of heavy metal thallium Removing, the μ g/L of thallium content in processed waste water≤0.1.
For the above-mentioned purpose, the present invention adopts the following technical scheme that:
A kind of method of advanced treating acid waste water containing thallium, using acid waste water containing thallium as process object, utilize neutralization precipitation and depth Degree processing United Technologies are handled, and finally realize that standard water discharge is discharged.
Comprise the following steps:
(1)PH nertralizers are added into acid waste water containing thallium, wastewater pH is adjusted to neutrality;
(2)To step(1)Precipitating reagent is added after neutralization in waste water, then waste water is passed through solid-liquid separating equipment;
(3)Supernatant after separation of solid and liquid is subjected to advanced treating, further filtered through filter after processing, standard water discharge discharge.
Step(1)The pH nertralizers are carbide slag, milk of lime, magnesium hydroxide solution, sodium hydroxide solution, potassium hydroxide One or more in solution, sodium carbonate liquor or sodium bicarbonate solution;
Preferably, pH nertralizers are milk of lime;
The concentration 10%~30% of milk of lime;
Preferably, the concentration of milk of lime is 10%~25%.
Step(2)The precipitating reagent is polymeric ferrous sulphate solution, polyaluminium ferrous solution, liquor ferri trichloridi, ferric sulfate One or more in solution, liquor alumini chloridi or polymeric aluminum chlorides solution, precipitating reagent addition are 0.2%~5%, the reaction time For 0.5h~6h;
Preferably, precipitating reagent is polymeric ferrous sulphate solution or polyaluminium ferrous solution;
Preferably, the addition of precipitating reagent is 0.5~3%;
Preferably, the reaction time is 1h~6h.
Step(2)The solid-liquid separating equipment is gravitational settler, centrifugal settler, filter press or filter;
Preferably, solid-liquid separating equipment is filter press.
Step(3)The method of the advanced treating is membrane separation process, bioanalysis, electric flocculation method or absorption method;
Preferably, advanced treating is absorption method.
Adsorbent selected by the absorption method is activated carbon, molecular sieve, chitosan, kaolin, polyacrylamide, SK- One or more in Tl02 type resin sorbents;
Preferably, adsorbent is SK-Tl02 type resin sorbents.
After neutralized precipitation and advanced treating United Technologies processing, the μ g/L of thallium content in waste water≤0.1, life can be back to Production. art or qualified discharge.
Thallium content is 0.5~10mg/L in the acid waste water containing thallium, and pH is 0.1~2.
Step(1)Middle that pH nertralizers are added into acid waste water containing thallium, wastewater pH, which is adjusted to 7 or so, pH nertralizers, to be Carbide slag, milk of lime, magnesium hydroxide solution, sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor or sodium bicarbonate solution In one or more, to be cost-effective, preferably milk of lime, the concentration 10%~30% of milk of lime, preferably 10%~25%, example Such as it is 10%, 15%, 20%, 25%.
Step(2)It is middle that precipitating reagent is added into waste water after neutralization, then waste water is passed through solid-liquid separating equipment;Precipitating reagent can be with For polymeric ferrous sulphate solution, polyaluminium ferrous solution, liquor ferri trichloridi, ferrum sulfuricum oxydatum solutum, liquor alumini chloridi, aluminium polychloride One or more in solution, preferably polymeric ferrous sulphate solution or polyaluminium ferrous solution;Precipitating reagent addition be 0.2%~ 5%, preferably 0.5~3%, for example, 0.5%, 1%, 2%, 3% etc.;Reaction time is 0.5h~6h, preferably 1h~6h, is, for example, 1h, 2h, 3h, 4h, 5h, 6h etc.;Solid-liquid separating equipment can be gravitational settler, centrifugal settler, filter press or filter, be Optimization processing technique, preferably filter press.
Step(3)The supernatant that separation of solid and liquid is obtained carries out advanced treating, and processed waste water can be back to production technology Or direct qualified discharge, the method for advanced treating can be membrane separation process, bioanalysis, electric flocculation method or absorption method, membrane separation process It is the selective penetrated property using film, according to the difference of the mass transfer selectivity in film of each component in multicomponent fluid, by higher External pressure, to realize separation, classification, purification or the enrichment to it, micro-filtration, ultrafiltration, nanofiltration and anti-are divided into according to the big I of membrane aperture Infiltration;Bioanalysis produces a kind of material of flocculent structure similar to activated sludge by cultivating strain on defined medium, Fully contacted with waste water containing thallium, the flocculating setting with reference to thallium therein, then separate, reach except thallium effect;Electric flocculation method be with Iron plate or aluminium sheet are anode, and after logical direct current, anode loses electronics, forms metal cation Fe2+、Al3+, gold is generated with OH- Belong to hydroxide colloid flocculant, the larger flock of generation is combined with heavy metal in waste water, is removed after precipitation or air supporting;Absorption Method is mainly the powerful suction-operated using adsorbent activity surface area or adsorption group, with metal ion formation ionic bond, altogether Valence link, chelate etc., then it is filtered remove removing heavy metals reach absorption removing heavy metals purpose;Advanced treating is preferably to adsorb Method.
The adsorbent that absorption method is selected can be activated carbon, molecular sieve, chitosan, kaolin, polyacrylamide, SK- One or more in Tl02 type resin sorbents, preferably SK-Tl02 types resin sorbent.
Step(3)The μ g/L of thallium content in filter water outlet≤0.1, non-secondary pollution, production technology or directly can be back to Qualified discharge.
The preferred scheme of the present invention, comprises the following steps:
(1)Milk of lime is added into acid waste water containing thallium, the concentration of milk of lime is 10%~25%, and wastewater pH is adjusted to 7 or so;
(2)To step(1)Adding polymeric ferrous sulphate solution or polyaluminium ferrous solution in obtained waste water, addition is 0.5%~ 3%, 1h~6h is reacted, separation of solid and liquid is carried out through filter press;
(3)Supernatant after separation of solid and liquid is passed through in the adsorption column equipped with SK-Tl02 type resin sorbents, adsorption column water outlet is passed through Filter filters, and the μ g/L of thallium content≤0.1, can be back to production technology or qualified discharge.
Compared with prior art, the present invention has the effect that:
(1)The invention discloses a kind of new method of advanced treating acid waste water containing thallium, this method passes through neutralization precipitation and depth Joint processing technology is handled, realizes the deep removal of heavy metal in waste water thallium, waste water is realized while reducing wastewater toxicity Qualified discharge, and this method technological process is simple, cost is cheap;
(2)Adsorption column of the present invention, floor space is small, simple to operate, and disposal ability is strong, and usage range is wide, can not only be single Reason of staying alone waste water, can also support the use with other water treatment facilities, realize the deep removal of heavy metal, thallium contains in adsorption column water outlet Measure≤0.1 μ g/L, non-secondary pollution generation;
(3)SK-Tl02 type resin sorbents involved in the present invention are the selective absorbents that independent research is prepared, and for weight The selective removal of thallium optimizes, and has the features such as treating capacity is big, and adsorption capacity is strong, effect stability, and cost is cheap.
Brief description of the drawings
Fig. 1 is the process chart of the inventive method.
Embodiment
For the present invention is better described, technical scheme is readily appreciated, below to the present invention further specifically It is bright.But following embodiments is only the simple example of the present invention, the scope of the present invention is not represented or limits, Protection scope of the present invention is defined by claims.
Embodiment 1
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 6.2 mg/L, pH 1.1.Will be useless with 10% milk of lime Water pH is adjusted to 7 or so, adds 0.2% polyaluminium ferrous solution, reaction time 6h, waste water enters through sedimentation centrifuge after reaction Row separation of solid and liquid, putting-down machine water outlet enter the adsorption column equipped with SK-Tl02 type resin sorbents, and filter mistake is passed through in adsorption column water outlet Filter, thallium content is 0.06 μ g/L in waste water after filtering, can reuse or directly outer row.
Embodiment 2
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 10 mg/L, pH 0.8.Will with 2 g/L NaOH solutions Wastewater pH is adjusted to 7 or so, adds 1% bodied ferric sulfate, reaction time 3h, waste water is delivered in filter press and carries out solid-liquid Separation, filter press water outlet enter electric flocculation removing heavy metals device, and water outlet is filtered, and thallium content is in waste water after filtering 0.08 μ g/L, can reuse or directly outer row.
Embodiment 3
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 4.8 mg/L, pH 1.6.Will be useless with 15% milk of lime Water pH is adjusted to 7 or so, adds 3% bodied ferric sulfate and the mixture solution of poly-ferric chloride, reaction time 2h, by waste water It is delivered in gravitational settler and carries out separation of solid and liquid, settler water outlet enters the adsorption column equipped with activated carbon, adsorption column water outlet warp Filter filters, and thallium content is 0.05 μ g/L in waste water after filtering, can reuse or directly outer row.
Embodiment 4
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 2.3 mg/L, pH 1.4.Will with 2 g/L KOH solutions Wastewater pH is adjusted to 7 or so, adds 5% polymeric ferrous sulphate solution, reaction time 1h, waste water is delivered in filter press and carried out Separation of solid and liquid, through nanofiltration membrane, thallium content is 0.12 μ g/L in waste water after filtering, can reuse or directly outer for filter press water outlet Row.
Embodiment 5
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 1.5 mg/L, pH 2.With 5% milk of lime by waste water PH is adjusted to 7 or so, adds 0.5% ferrum sulfuricum oxydatum solutum, reaction time 5h, waste water is delivered in gravitational settler and consolidated Liquid is separated, and settler water outlet enters the adsorption column equipped with SK-Tl02 type resin sorbents, and adsorption column water outlet is filtered, Thallium content is 0.02 μ g/L in waste water after filtering, can reuse or directly outer row.
Embodiment 6
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 1.5 mg/L, pH 2.With 20% milk of lime by waste water PH is adjusted to 7 or so, adds 1% liquor ferri trichloridi, reaction time 3h, waste water is delivered in filter and carries out solid-liquid point From filter water outlet enters the adsorption column equipped with molecular sieve, and adsorption column water outlet is filtered, thallium content in waste water after filtering , can reuse or directly outer row for 0.03 μ g/L.
Embodiment 7
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 0.5 mg/L, pH 1.6.With 6 g/L Mg (OH)2It is molten Wastewater pH is adjusted to 7 or so by liquid, is added 3% polymeric ferrous sulphate solution, reaction time 3h, waste water is delivered in filter press Separation of solid and liquid is carried out, filter press water outlet enters the adsorption column equipped with SK-Tl02 type resin sorbents, and filter is passed through in adsorption column water outlet Filtering, thallium content is 0.01 μ g/L in waste water after filtering, can reuse or directly outer row.
Embodiment 8
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 4.6 mg/L, pH 1.3.With 2 g/L NaHCO3It is molten Wastewater pH is adjusted to 7 or so by liquid, is added 2% ferrum sulfuricum oxydatum solutum, reaction time 4h, waste water is delivered in filter press and carried out Separation of solid and liquid, filter press water outlet enter the adsorption column equipped with polyacrylamide, and adsorption column water outlet is filtered, and are given up after filtering Thallium content is 0.01 μ g/L in water, can reuse or directly outer row.
Embodiment 9
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 7.5 mg/L, pH 1.1.Will be useless with 30% milk of lime Water pH is adjusted to 7 or so, adds 5% polymeric aluminum chlorides solution, reaction time 0.5h, waste water is delivered in filter press and carried out Separation of solid and liquid, filter press water outlet enter the adsorption column equipped with activated carbon and SK-Tl02 type resin sorbents, and adsorption column water outlet is passed through Filter filters, and thallium content is 0.04 μ g/L in waste water after filtering, can reuse or directly outer row.
Embodiment 10
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 8.2 mg/L, pH 0.9.With carbide slag by wastewater pH 7 or so are adjusted to, adds 1% liquor alumini chloridi, reaction time 5h, waste water, which is delivered in filter, after reaction carries out solid-liquid point From filter water outlet, which enters, is equipped with kaolinic adsorption column, and adsorption column water outlet is filtered, thallium content in waste water after filtering , can reuse or directly outer row for 0.15 μ g/L.
Embodiment 11
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 6.4 mg/L, pH 1.4.Will be useless with 15% milk of lime Water pH is adjusted to 7 or so, adds 2% polymeric ferrous sulphate solution, reaction time 4h, waste water is delivered in gravitational settler Row separation of solid and liquid, settler water outlet enter activated sludge tank, are separated after 10h is stopped in activated sludge tank through precipitation, supernatant Middle thallium content is 0.08 μ g/L, can reuse or directly outer row.
Embodiment 12
Certain factory provides a kind of acid waste water containing thallium, and wherein thallium content is 6.4 mg/L, pH 1.4.With 4 g/L Na2CO3It is molten Wastewater pH is adjusted to 7 or so by liquid, is added 3% polymeric aluminum chlorides solution, reaction time 1h, waste water is delivered in filter press Separation of solid and liquid is carried out, filter press water outlet enters the adsorption column equipped with chitosan, and adsorption column water outlet is filtered, and is given up after filtering Thallium content is 0.09 μ g/L in water, can reuse or directly outer row.
Applicant's statement, the method for the invention that the present invention is illustrated by above-described embodiment, but the invention is not limited in Aforesaid operations step, that is, do not mean that the present invention has to rely on aforesaid operations step and could implemented.The technology of art Personnel it will be clearly understood that any improvement in the present invention, the addition of equivalence replacement and auxiliary element to raw material selected by the present invention, Selection of concrete mode etc., within the scope of all falling within protection scope of the present invention and disclosing.

Claims (9)

  1. A kind of 1. method of advanced treating acid waste water containing thallium, it is characterised in that using acid waste water containing thallium as process object, utilize Neutralization precipitation and advanced treating United Technologies are handled, and finally realize that standard water discharge is discharged.
  2. 2. the method as described in claim 1, it is characterised in that comprise the following steps:
    (1)PH nertralizers are added into acid waste water containing thallium, wastewater pH is adjusted to neutrality;
    (2)To step(1)Precipitating reagent is added after neutralization in waste water, then waste water is passed through solid-liquid separating equipment;
    (3)Supernatant after separation of solid and liquid is subjected to advanced treating, further filtered through filter after processing, standard water discharge discharge.
  3. 3. method as claimed in claim 2, it is characterised in that step(1)The pH nertralizers are carbide slag, milk of lime, hydrogen One or more in magnesium oxide solution, sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor or sodium bicarbonate solution;
    Preferably, pH nertralizers are milk of lime;
    The concentration 10%~30% of milk of lime;
    Preferably, the concentration of milk of lime is 10%~25%.
  4. 4. method as claimed in claim 3, it is characterised in that step(2)The precipitating reagent is polymeric ferrous sulphate solution, polymerization One or more in ferric chloride solution, liquor ferri trichloridi, ferrum sulfuricum oxydatum solutum, liquor alumini chloridi or polymeric aluminum chlorides solution, Precipitating reagent addition is 0.2%~5%, and the reaction time is 0.5h~6h;
    Preferably, precipitating reagent is polymeric ferrous sulphate solution or polyaluminium ferrous solution;
    Preferably, the addition of precipitating reagent is 0.5~3%;
    Preferably, the reaction time is 1h~6h.
  5. 5. method as claimed in claim 4, it is characterised in that step(2)The solid-liquid separating equipment be gravitational settler, from Heart settler, filter press or filter;
    Preferably, solid-liquid separating equipment is filter press.
  6. 6. method as claimed in claim 5, it is characterised in that step(3)The method of the advanced treating is membrane separation process, life Thing method, electric flocculation method or absorption method;
    Preferably, advanced treating is absorption method.
  7. 7. method as claimed in claim 6, it is characterised in that the adsorbent selected by the absorption method is activated carbon, molecule One or more in sieve, chitosan, kaolin, polyacrylamide, SK-Tl02 type resin sorbents;
    Preferably, adsorbent is SK-Tl02 type resin sorbents.
  8. 8. the method as described in any claim in claim 1-7, it is characterised in that neutralized precipitation and advanced treating connection After closing technical finesse, the μ g/L of thallium content in waste water≤0.1, production technology or qualified discharge can be back to.
  9. 9. method as claimed in claim 8, it is characterised in that thallium content is 0.5~10mg/L in the acid waste water containing thallium, PH is 0.1~2.
CN201710358414.5A 2017-05-19 2017-05-19 A kind of method of advanced treating acid waste water containing thallium Pending CN107417004A (en)

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CN108840422A (en) * 2018-05-23 2018-11-20 四川川能环保科技有限公司 A kind of industrial sewage process method
CN110183020A (en) * 2019-06-06 2019-08-30 福建兴万祥建设集团有限公司 A kind of processing method for heavy metal wastewater thereby of digging up mine
CN110776184A (en) * 2019-11-07 2020-02-11 广东先导稀材股份有限公司 Advanced treatment method of thallium-containing wastewater
CN113636627A (en) * 2021-10-14 2021-11-12 北京中关村国际环保产业促进中心有限公司 Device and method for removing thallium pollution in wastewater

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