CN102976434A - Method for treating lead-containing wastewater - Google Patents
Method for treating lead-containing wastewater Download PDFInfo
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- CN102976434A CN102976434A CN2012105386381A CN201210538638A CN102976434A CN 102976434 A CN102976434 A CN 102976434A CN 2012105386381 A CN2012105386381 A CN 2012105386381A CN 201210538638 A CN201210538638 A CN 201210538638A CN 102976434 A CN102976434 A CN 102976434A
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- attapulgite
- waste water
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- amorphous silica
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Abstract
The invention discloses a method for treating lead-containing wastewater. The method is characterized in that an adsorbing material is prepared from the following raw materials in percent by mass: 20-50 percent of modified attapulgite, 20-40 percent of hydrotalcite and 30-40 percent of amorphous silicon dioxide, wherein the amorphous silicon dioxide is a silicon product obtained by treating silica lapilli tuff with water. The method has the advantages of simple process procedure, lower operation cost, no sludge generation, and remarkable lead removal effect, and is high in removal rate of above 99 percent because the concentration of the remained lead ions in water after being subjected to primary treatment is less than 0.6mg/L and is lower than a first-class emission standard specified by the state.
Description
Technical field
The present invention relates to a kind for the treatment of process of lead waste water, particularly process the waste water of lead concentration in 10～200mg/L scope, belong to field of waste water treatment in the environment protection.
Background technology
Lead is the very wide element of distributed in nature, also is one of normal element that uses in the industry, exist mainly with sulphided form at occurring in nature, and only be metallic state on a small quantity, and the elements such as normal and zinc, copper coexist.Lead and compound thereof are a kind of nondegradable environmental pollutant, can flow in a large number environment by waste water,waste gas and industrial residue, enter directly or indirectly human body by food chain, soil, water and air, the infringement hemopoietic system, cause anaemia, neural system peripheral nerve inflammation, also can flow into cerebral tissue with blood, infringement cerebellum and brain cortex cell, disturb metabolic activity, cause brain injury, and Toxicity of Lead is lasting, the transformation period reaches 10 years, be difficult for being discharged by human body, the Lead contamination of any degree all can have a negative impact to HUMAN HEALTH.Total lead in the waste water is first kind pollutent, and lead waste water such as need discharge, and total lead must reach first kind pollutent maximum permissible concentration emission standard at the workshop discharge outlet.
At present, process the heavy metal in waste water lead ion, industrial general employing chemical precipitation method, ion exchange method, electrolytic process.In addition, liquid-film method and biosorption process are the treatment processs of emerging lead waste water, are at present conceptual phase, are developing direction from now on.Chemical precipitation method equipment is simple, easy to operate, treatment effect is good, at present, the processing of the lead waste water of high density, large flow is used more general, but expense is high, treatment capacity is little, poor selectivity, sludge quantity are large, mud is difficult for processing, easily cause secondary pollution.Ion exchange method has that floor space is little, convenient management, lead ion decreasing ratio are high, and process the proper regenerated liquid that makes and reclaim as resource, can not cause secondary pollution to environment, but one-time investment is large, working cost is high, resin vulnerable to pollution or oxidation deactivation, regeneration is frequent, and also there is certain difficulty in the regeneration problem.The electrolytic process technical maturity has the clearance height, non-secondary pollution, and the heavy metal recoverable that precipitates, it is stronger that waste water quality is changed adaptability, and the reaction times is short, but energy consumption is large when processing a large amount of waste water, and the electrode metal consumption is large, is not suitable for high-concentration waste water.Liquid-film method has purified water quality, again enriching and recovering heavy metal, play double effects, but because the liquid film technology difficulty is large,, poor performance few for the preparation of the tensio-active agent kind of emulsifying agent liquid film, demulsification technology do not pass a test etc., have hindered the industrialization of this method.Biosorption process does not use chemical agent, sludge quantity is few, but non-secondary pollution, discharge water reuse, recyclable and the bacterium mud of metal can be used as fertilizer in the bacterium mud, microorganism is good to lead ion treatment effect under lower concentration, but is subject to pH value, temperature, concentration of metal ions, biomembranous culture condition, coexistence heavy metal ion etc. than multifactor impact.
Summary of the invention
The objective of the invention is: for overcoming the deficiencies in the prior art, a kind for the treatment of process of lead waste water is provided, this invented technology flow process is simple, running cost is low, obvious processing effect, after primary treatment in the water residual plumbum ion concentration less than 0.6mg/L, be lower than the first discharge standard of national regulation, clearance produces without precipitation up to more than 99%, can not cause secondary pollution.
The technical solution used in the present invention is: a kind for the treatment of process of lead waste water is the sorbing material that raw material is prepared into by attapulgite modified, hydrotalcite and amorphous silica, by quality ratio, attapulgite modified 20～50%, hydrotalcite 20～40%, amorphous silica 20～40%.
Described attapulgite modified be take attapulgite as raw material, the dignified limestone in volcano is activator, uses the hydrochloric acid acidleach, mixes metallic iron ion and magnesium ion again and is prepared from; Described hydrotalcite passes through the alkali cleaning acidleach, high-temperature activation again through being ground into 80 purpose particles; Described amorphous silica is to obtain siliceous product with the dignified limestone in water treatment silicon-dioxide volcano.
The method of modifying of described attapulgite is: take attapulgite as raw material, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is activator, through pulverizing, preparing burden, then be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration, preimpregnation, to the magnesium ion of the iron ion that wherein adds 2M and 1M, solid-liquid separation, solid matter formed through 800 ℃～900 ℃ high-temperature activations in 6～8 hours again.
The preparation method of described amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water, import the segregation that is hydrolyzed in the revolving drum machine, the ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
Application method of the present invention is: the attapulgite, hydrotalcite and the amorphous silica that prepare are re-dubbed deleading agent in mass ratio, regulating the pH value is 9.7～12.3, at normal temperature and pressure slurrying, preimpregnation 3～16h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 70～90 ℃, continue to leach 35～60min under normal pressure, joining lead tolerance is in 10～200mg/L waste water, stirs after 20～45min, and water outlet can reach national grade one discharge standard, and clearance is more than 99%.
The invention has the beneficial effects as follows:
(1) technical process is simple, and running cost is low;
(2) obvious processing effect, residual plumbum ion concentration is lower than the first discharge standard of national regulation less than 0.6mg/L in the water after primary treatment, and clearance is up to more than 99%;
(3) the present invention is when the heavy metal wastewater therebies such as acid, the alkali of processing various concentration is leaded, and the heavy metal content such as lead that all can guarantee water outlet stably are lower than the highest permission emission concentration of trade effluent and are near or below the concentration of Drinking Water matter standard code.
Embodiment
A kind for the treatment of process of lead waste water is the sorbing material that raw material is prepared into by attapulgite modified, hydrotalcite and amorphous silica, and is attapulgite modified 20～50% by quality ratio, hydrotalcite 20～40%, amorphous silica 20～40%.
Described attapulgite modified be take attapulgite as raw material, the dignified limestone in volcano is activator, uses the hydrochloric acid acidleach, mixes metallic iron ion and magnesium ion again and is prepared from; Described hydrotalcite passes through the alkali cleaning acidleach, high-temperature activation again through being ground into 80 purpose particles; Described amorphous silica is to obtain siliceous product with the dignified limestone in water treatment silicon-dioxide volcano.
The method of modifying of described attapulgite is: take attapulgite as raw material, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is activator, through pulverizing, preparing burden, then be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration, preimpregnation, to the magnesium ion of the iron ion that wherein adds 2M and 1M, solid-liquid separation, solid matter formed through 800 ℃～900 ℃ high-temperature activations in 6～8 hours again.
The preparation method of described amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water, import the segregation that is hydrolyzed in the revolving drum machine, the ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
Application method of the present invention is: the attapulgite, hydrotalcite and the amorphous silica that prepare are re-dubbed deleading agent in mass ratio, regulating the pH value is 9.7～12.3, at normal temperature and pressure slurrying, preimpregnation 3～16h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 70～90 ℃, continue to leach 35～60min under normal pressure, joining lead tolerance is in 10～200mg/L waste water, stirs after 20～45min, and water outlet can reach national grade one discharge standard, and clearance is more than 99%.
Example 1: choose the attapulgite 20%, 40% hydrotalcite and 40% amorphous silica that prepare and be re-dubbed in mass ratio deleading agent, regulating the pH value is 9.7, at normal temperature and pressure slurrying, preimpregnation 3h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 70 ℃, continue to leach 35min under normal pressure, joining zinc content is in the 200mg/L waste water, stirs after the 20min, and zinc content is 0.6mg/L in the water outlet, and clearance is 99.7%.
Example 2: choose the attapulgite 30%, 30% hydrotalcite and 40% amorphous silica that prepare and be re-dubbed in mass ratio deleading agent, regulating the pH value is 11.2, at normal temperature and pressure slurrying, preimpregnation 10h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 80 ℃, continue to leach 50min under normal pressure, joining zinc content is in the 150mg/L waste water, stirs after the 30min, and zinc content is 0.3mg/L in the water outlet, and clearance is 99.8%.
Example 3: choose 40% attapulgite, 40% hydrotalcite and 20% amorphous silica that prepare and be re-dubbed in mass ratio deleading agent, regulating the pH value is 12.3, at normal temperature and pressure slurrying, preimpregnation 16h, more this ore pulp is imported the protection against corrosion stirred leaching tank; Heat to 90 ℃, continue to leach 60min under normal pressure, joining zinc content is in the 50mg/L waste water, stirs after the 45min, and zinc content is 0.1mg/L in the water outlet, and clearance is 99.8%.
Claims (4)
1. the treatment process of a lead waste water, it is characterized in that: be the sorbing material that raw material is prepared into by attapulgite modified, hydrotalcite and amorphous silica, by quality ratio, attapulgite modified 20～50%, hydrotalcite 20～40%, amorphous silica 20～40%.
2. the treatment process of described a kind of lead waste water according to claim 1 is characterized in that: described attapulgite modified be take attapulgite as raw material, the dignified limestone in volcano is activator, uses the hydrochloric acid acidleach, mixes metallic iron ion and magnesium ion again and is prepared from; Described hydrotalcite passes through the alkali cleaning acidleach, high-temperature activation again through being ground into 80 purpose particles; Described amorphous silica is to obtain siliceous product with the dignified limestone in water treatment silicon-dioxide volcano.
3. the treatment process of a kind of lead waste water according to claim 1, it is characterized in that: the method for modifying of attapulgite is: take attapulgite as raw material, the dignified limestone in siliceous volcano that adds ore amount 1/10～1/5 is activator, through pulverizing, preparing burden, then be slurrying in the aqueous hydrochloric acid of 100～200mg/L in mass concentration, preimpregnation, to the magnesium ion of the iron ion that wherein adds 2M and 1M, solid-liquid separation, solid matter formed through 800 ℃～900 ℃ high-temperature activations in 6～8 hours again.
4. the treatment process of a kind of lead waste water according to claim 1, it is characterized in that: the preparation method of amorphous silica is: " the dignified limestone in siliceous volcano " protolith of extraction is sieved, fetches water, import the segregation that is hydrolyzed in the revolving drum machine, the ore discharge of cylindrical machine, silicon are starched in the rock slag and are separated, and silicon slurry part is through precipitating, dewater, be drying to obtain product.
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| CN201210538638.1A CN102976434B (en) | 2012-12-11 | 2012-12-11 | Method for treating lead-containing wastewater |
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| CN201210538638.1A CN102976434B (en) | 2012-12-11 | 2012-12-11 | Method for treating lead-containing wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150238928A1 (en) * | 2012-06-21 | 2015-08-27 | Ftu Gmbh Forschung Und Technische Entwicklung Im Umweltschutz | Modified trass and process for its preparation |
| US10058814B2 (en) | 2014-09-22 | 2018-08-28 | Ftu Gmbh | Process for purifying fluids |
| CN115155508A (en) * | 2022-07-06 | 2022-10-11 | 上海交通大学 | FeS/LDH nano adsorbent and synthetic method and application thereof |
| CN116116881A (en) * | 2023-01-29 | 2023-05-16 | 西部矿业股份有限公司 | Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues |
| CN116444054A (en) * | 2023-06-14 | 2023-07-18 | 济南山源环保科技有限公司 | Boiler water treatment agent and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150238928A1 (en) * | 2012-06-21 | 2015-08-27 | Ftu Gmbh Forschung Und Technische Entwicklung Im Umweltschutz | Modified trass and process for its preparation |
| US9597654B2 (en) * | 2012-06-21 | 2017-03-21 | FTU GmbH Forschung und Technische Entwicklung im Umweitschutz | Modified trass and process for its preparation |
| US10058814B2 (en) | 2014-09-22 | 2018-08-28 | Ftu Gmbh | Process for purifying fluids |
| CN115155508A (en) * | 2022-07-06 | 2022-10-11 | 上海交通大学 | FeS/LDH nano adsorbent and synthetic method and application thereof |
| CN115155508B (en) * | 2022-07-06 | 2024-01-05 | 上海交通大学 | FeS/LDH nano adsorbent and synthetic method and application thereof |
| CN116116881A (en) * | 2023-01-29 | 2023-05-16 | 西部矿业股份有限公司 | Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues |
| CN116116881B (en) * | 2023-01-29 | 2024-02-23 | 西部矿业股份有限公司 | Method for cooperatively treating lead-containing wastewater by utilizing modified stone coal vanadium extraction smelting waste residues |
| CN116444054A (en) * | 2023-06-14 | 2023-07-18 | 济南山源环保科技有限公司 | Boiler water treatment agent and preparation method thereof |
| CN116444054B (en) * | 2023-06-14 | 2023-08-29 | 济南山源环保科技有限公司 | Boiler water treatment agent and preparation method thereof |
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| CN102976434B (en) | 2014-01-15 |
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Effective date of registration: 20160129 Address after: 516323 Guangdong County of Huidong Province town of Liang stone Liao Nan Keng Patentee after: Huizhou Dongjiang Veolia Environmental Service Co., Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Patentee before: Changzhou University |