CN102583630A - Method for treating antimony-containing waste water by modified bentonite - Google Patents
Method for treating antimony-containing waste water by modified bentonite Download PDFInfo
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- CN102583630A CN102583630A CN2012100514612A CN201210051461A CN102583630A CN 102583630 A CN102583630 A CN 102583630A CN 2012100514612 A CN2012100514612 A CN 2012100514612A CN 201210051461 A CN201210051461 A CN 201210051461A CN 102583630 A CN102583630 A CN 102583630A
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Abstract
The invention relates to the field of waste water treatment, and especially relates to a method for treating antimony-containing waste water by modified bentonite. The method provided by the invention solves the problems of treatment on high-concentration antimony-containing waste water. The method provided by the invention comprises the following steps of drying and crushing bentonite, carrying out fine grinding, carrying out boiling by a H2SO4 solution, washing, drying by an oven, grinding to obtain an adsorbent, adding the adsorbent into a reaction tank of antimony-containing waste water according to a weight ratio of 2.5%, mixing, adjusting a pH value of the mixture to a pH value of 5.5 to 6.5, stirring at a treatment temperature of 4 to 7 DEG C at a rate of 200 to 300r/min for 3 hours, and standing for 120 to 210 minutes for precipitation so that solid-liquid separation is realized and product water having low antimony content is obtained. The method provided by the invention has the advantages of high efficiency, low energy consumption, simple and easy processes, fast adsorption speed, large and full adsorption capacity, high clearance of antimony in waste water, low cost, good effects and wide application prospects, wherein through the method, the clearance of antimony in waste water can reach above 95%.
Description
Technical field
The present invention relates to field of waste water treatment, be specially the method that a kind of modified alta-mud is handled stibium-containing wastewater.
Background technology
Along with the improving constantly of Chinese economic development and industrialization degree, the antimony pollution in the environment just becomes increasingly conspicuous in recent years, and especially around smeltery and mining area, antimony pollution is particularly outstanding.On the other hand, antimony is similar with arsenic aspect toxicity and toxicity, so the antimony pollution in the environment has produced the great danger side of body over against human beings'health.Last decade comes; Antimony pollution in the environment just progressively causes the common concern of various countries, China newly revise " drinking water sanitary standard " that begin to carry out on July 1st, 2007 (GB5749-2006) in the newly-increased tap water the high-content standard of antimony be 5 μ g/L.Therefore, along with the increasing of country to the environment protection dynamics, the stibium-containing wastewater comprehensive regulation has become the brand-new problem of antimony industry.
For the heavy metal ion that has arsenic, copper, lead etc. in the waste water, the commonplace removal method that adopts at present is the flocculation agent with iron aluminium, methods such as activated carbon adsorption; And the shortcoming of a coexistence of these methods; The expense that is exactly wastewater treatment is higher, thus adopt these methods, when obtaining qualified effluent quality; The cost of Industrial Wastewater Treatment is also very high, and this often makes industrial cost increase.
The antimony ore reserves of China are abundant, and the tinnery that is positioned at the Hunan Lengshuijiang City is one of antimony ore the biggest in the world, and about 80% from China in world's antimony YO, is called as " world's antimony all ".Smelt in the mining action process and can produce a large amount of stibium-containing wastewaters, and if these waste water can not pass through the processing qualified discharge, bring very big harm will for local water surrounding, so antimony pollution and control problem more should attract great attention.
Antimony is not the essential element of organism.The antimony toxicity size order of different valence state is following: 0 valency >+3 (III) valency >+5 (V) valency>antimony organic.Wherein antimonious toxicity is than high ten times of quinquevalence antimonies.Based on toxicity research, think that the TLV of antimony is 3.5-5mg/kg in the soil to antimony.So the processing to the high density antimony pollution is exactly the current problem that must solve.
Existing method has: 1 chemical precipitation method refers to make the antimony in the water form the method that deposition is able to remove through outer adding medicine, and 2, electrochemical method, through handling, can make in the water antimony content reduce to 0.14mg/L by 28mg/L.
3, ion exchange method 4, also have document to report once that gac had fabulous absorption property to antimony.
Wilkinite once was used to plumbous removal, and " mineral products comprehensive utilization ", June calendar year 2001, " research of activated bentonite absorption Pb ionic ", a literary composition thinks that the bentonite in treatment lead waste water has obtained removal effect preferably.China's bentonite resource is very abundant, and produced quantity is about 2,000,000 tons now, and it is as the scavenging agent of water treatment aspect environment protection, and sorbent material has brought a new way to environment protection.Therefore, be the main material production sorbent material with the wilkinite ore, using in the processing that contains harmful metals ion waste water is a kind of cost-effective environmental protection new way.
Summary of the invention
The present invention provides a kind of modified alta-mud to handle the method for stibium-containing wastewater in order to solve the handling problem of high density stibium-containing wastewater.
The present invention is realized that by following technical scheme a kind of modified alta-mud is handled the method for stibium-containing wastewater, and wilkinite is levigate to 200 orders after drying and crushing is handled, with the H of 1 mol/L
2SO
4Solution boils wilkinite, and boiling time is 1 hour, and solid-to-liquid ratio is 10-20 g/100 mL, filter, and washing, after the oven dry, abrasive flour becomes sorbent material;
Ratio according to 2.5% weight percentage in the reaction tank of stibium-containing wastewater adds above-mentioned sorbent material, after the mixing, and the pH value of mixed solution is transferred to 5.5-6.5; Treatment temp is 4-7 ℃, stirs 3 hours with the speed of 200-300 r/min, leaves standstill 120-210 minute; Deposition makes solid-liquid separation.Can reach and contain the less water outlet of antimony concentration.
This sorbent material is applicable to the highly acid stibium-containing wastewater of high density, present method efficient low-consume, and method is simple, and rate of adsorption is fast; Absorption is complete, and loading capacity is big, and the clearance of antimony reaches as high as more than 90% in the water; It is low to have cost, and good effectiveness has broad application prospects.
Embodiment
The mine stibium-containing wastewater in somewhere, wherein the starting point concentration of difference sampling antimony is followed successively by 5 mg/L, 10 mg/L, 15 mg/L, 20 mg/L, 30 mg/L, 40 mg/L, natural montmorillonite is levigate to 200 orders after drying and crushing is handled, with the H of 1 mol/L
2SO
4Solution boils 1 hour (solid-to-liquid ratio is 15 g/100 mL) with wilkinite, filters, and washing, after the oven dry, abrasive flour becomes sorbent material;
Embodiment 1
The ratio of the weight percentage in 2.5% adds above-mentioned bentone adsorbent in stibium-containing wastewater, regulate the pH value and be respectively 6, and temperature of reaction is followed successively by 5 ℃, 25 ℃; 50 ℃, stirred 3 hours with the speed of 250r/min, left standstill 200 minutes; Deposition, make solid-liquid separation after, the concentration of the Antimony in Waste Water after measure handling; Under the different reaction conditions, the clearance that obtains is as shown in table 1 below, on average reaches more than 95%.
Table 1, under 5 ℃ of reaction conditionss, the clearance of stibium-containing wastewater after the bentonite in treatment after the modification
| Starting point concentration | 5mg/L | 10 mg/L | 15 mg/L | 20 mg/L | 30 mg/L | 40 mg/L |
| Handle back concentration | 0.2 mg/L | 0.5 mg/L | 0.75 mg/L | 0.6 mg/L | 1.5 mg/L | 1.6 mg/L |
| Clearance | 96% | 95% | 95% | 97% | 95% | 96% |
Embodiment 2
The ratio of the weight percentage in 2.5% adds above-mentioned bentone adsorbent in stibium-containing wastewater, regulate the pH value and be respectively 6, and temperature of reaction is followed successively by 5 ℃; 25 ℃, 50 ℃, stirred 3 hours with the speed of 300r/min; Left standstill 120-210 minute, the deposition, make solid-liquid separation after; Measure the concentration of the Antimony in Waste Water after handling, under the different reaction conditions, the clearance that obtains is as shown in table 2 below.
Under 25 ℃ of reaction conditionss of table 2., the clearance of stibium-containing wastewater after the bentonite in treatment after the modification
| Starting point concentration | 5 mg/L | 10 mg/L | 15 mg/L | 20 mg/L | 30 mg/L | 40 mg/L |
| Handle back concentration | 0.45 mg/L | 0.9 mg/L | 1.35 mg/L | 2 mg/L | 3 mg/L | 4 mg/L |
| Clearance | 91% | 91% | 91% | 90% | 90% | 90% |
Embodiment 3
The ratio of the weight percentage in 2.5% adds above-mentioned bentone adsorbent in stibium-containing wastewater, regulate the pH value and be respectively 6, and temperature of reaction is followed successively by 5 ℃; 25 ℃, 50 ℃, stirred 3 hours with the speed of 200r/min; Left standstill 120-210 minute, the deposition, make solid-liquid separation after; Measure the concentration of the Antimony in Waste Water after handling, under the different reaction conditions, the clearance that obtains is as shown in table 3 below.
Table 3, under 50 ℃ of reaction conditionss, the clearance of stibium-containing wastewater after the bentonite in treatment after the modification
| Starting point concentration | 5 mg/L | 10 mg/L | 15 mg/L | 20 mg/L | 30 mg/L | 40 mg/L |
| Handle back concentration | 0.55 mg/L | 1.1 mg/L | 1.65 mg/L | 2.2 mg/L | 3.9 mg/L | 5.2 mg/L |
| Clearance | 89% | 89% | 89% | 89% | 87% | 87% |
Claims (2)
1. a modified alta-mud is handled the method for stibium-containing wastewater, it is characterized in that wilkinite levigate to 200 orders after drying and crushing is handled, with the H of 1 mol/L
2SO
4Solution boils wilkinite 1 hour, and solid-to-liquid ratio is 10-20 g/100 mL, filters, and washing after the oven dry, is ground and is sorbent material; Part by weight according to 2.5% in the reaction tank of stibium-containing wastewater adds above-mentioned sorbent material, after the mixing, and the pH value of mixed solution is transferred to 5.5-6.5; Treatment temp is 4-7 ℃, stirs 3 hours with the speed of 200-300 r/min, leaves standstill 120-210 minute; Deposition makes solid-liquid separation.
2. modified alta-mud according to claim 1 is handled the method for stibium-containing wastewater, it is characterized in that wilkinite levigate to 200 orders after drying and crushing is handled, with the H of 1 mol/L
2SO
4Solution boils wilkinite 1 hour, and solid-to-liquid ratio is 15g/100 mL, filters, and washing after the oven dry, is ground and is sorbent material; Part by weight according to 2.5% in the reaction tank of stibium-containing wastewater adds above-mentioned sorbent material, after the mixing, and the pH value of mixed solution is transferred to 6, and treatment temp is 5 ℃, stirs 3 hours with the speed of 250r/min, leaves standstill 200 minutes, and deposition makes solid-liquid separation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084451A (en) * | 2015-08-21 | 2015-11-25 | 中国环境科学研究院 | Method for treating antimonous wastewater with modified blue-green algae |
| CN105984977A (en) * | 2016-05-12 | 2016-10-05 | 浙江海洋大学 | Treatment process of cupriferous waste water |
| CN112246216A (en) * | 2020-09-28 | 2021-01-22 | 池秀珠 | Preparation method of modified bentonite applied to antimony-containing wastewater treatment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52126065A (en) * | 1976-04-15 | 1977-10-22 | Sekisui Chem Co Ltd | Process for treating waste water of a paper factory |
| CN102151544A (en) * | 2011-02-15 | 2011-08-17 | 湖南化工研究院 | Organic wastewater modified bentonite adsorbent and preparation method thereof |
-
2012
- 2012-03-01 CN CN2012100514612A patent/CN102583630A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52126065A (en) * | 1976-04-15 | 1977-10-22 | Sekisui Chem Co Ltd | Process for treating waste water of a paper factory |
| CN102151544A (en) * | 2011-02-15 | 2011-08-17 | 湖南化工研究院 | Organic wastewater modified bentonite adsorbent and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| JIANHONG XI ET AL: "Adsorption of antimony(III) and antimony(V) on bentonite: Kinetics, thermodynamics and anion competition", 《MICROCHEMICAL JOURNAL》, vol. 97, no. 1, 4 June 2010 (2010-06-04) * |
| 胡恭任等: "酸改性膨润土处理含铅废水", 《中国矿业》, vol. 16, no. 2, 15 February 2007 (2007-02-15) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105084451A (en) * | 2015-08-21 | 2015-11-25 | 中国环境科学研究院 | Method for treating antimonous wastewater with modified blue-green algae |
| CN105084451B (en) * | 2015-08-21 | 2018-07-31 | 中国环境科学研究院 | A kind of method of modified cyanobacteria processing waste water containing trivalent antimony |
| CN105984977A (en) * | 2016-05-12 | 2016-10-05 | 浙江海洋大学 | Treatment process of cupriferous waste water |
| CN112246216A (en) * | 2020-09-28 | 2021-01-22 | 池秀珠 | Preparation method of modified bentonite applied to antimony-containing wastewater treatment |
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Application publication date: 20120718 |