CN103182292B - Novel Cr (VI) adsorbent and preparation method thereof - Google Patents
Novel Cr (VI) adsorbent and preparation method thereof Download PDFInfo
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- CN103182292B CN103182292B CN201310119161.8A CN201310119161A CN103182292B CN 103182292 B CN103182292 B CN 103182292B CN 201310119161 A CN201310119161 A CN 201310119161A CN 103182292 B CN103182292 B CN 103182292B
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- steel slag
- slag
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 20
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000002893 slag Substances 0.000 claims abstract description 78
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 8
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000003607 modifier Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- ONCZQWJXONKSMM-UHFFFAOYSA-N dialuminum;disodium;oxygen(2-);silicon(4+);hydrate Chemical compound O.[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Na+].[Na+].[Al+3].[Al+3].[Si+4].[Si+4].[Si+4].[Si+4] ONCZQWJXONKSMM-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229940080314 sodium bentonite Drugs 0.000 claims description 2
- 229910000280 sodium bentonite Inorganic materials 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000002250 absorbent Substances 0.000 abstract description 2
- 230000002745 absorbent Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 26
- 238000010521 absorption reaction Methods 0.000 description 12
- 229910001385 heavy metal Inorganic materials 0.000 description 5
- 238000005554 pickling Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Furnace Details (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a novel Cr (VI) adsorbent which does not cause secondary pollution and can be recycled, and a preparation method thereof. The absorbent is prepared by modifying steel slag. The novel Cr (VI) adsorbent prepared with the method is added into waste water and undispersed, solid is separated from liquid after adsorption equilibrium, and the separated steel slag particles can be recycled by acid washing. The steel slag-industrial waste is recycled, so that the purpose of 'treating waste with waste' is achieved and good economic and environmental benefits are obtained.
Description
Technical field
The invention belongs to Industrial Wastewater Treatment and trade waste recycling field, be specifically related to a kind ofly not produce secondary pollution, novel C r (VI) adsorbent that can reuse and preparation method thereof.
Background technology
Along with industrial expansions such as plating, give off a large amount of chromate waste water, make the pollution sharp deterioration of Heavy Metals in Water Environment chromium, serious harm is caused to human health and ecological environment.And be the compound of Cr (VI) containing endangering maximum in the compound of chromium, it has carcinogenic danger.
Slag is that (in slag, main component is CaO, MgO, FeO, Fe to the waste residue produced in steelmaking process
2o
3deng), quantity is about 15% ~ 20% of output of steel.China's slag discharge capacity is very large, has accumulated more than 300,000,000 tons, and the discharge capacity of since two thousand three annual increase up to a million tons.But the utilization rate of slag is very low, only 13%, and be mainly used in building the road or as steel-making flux, all belong to low value-added utilization, large steel slag abandoned piles becomes large public hazards of contaminated environment.At present, the attached value of height of seeking slag utilizes, and has become the emphasis of numerous scholar's research.Slag itself is loose porous, has certain adsorption capacity, and slag density is large, and be easy to Separation of Solid and Liquid, slag is cheap in addition, wide material sources, so it has wide research, application prospect as adsorbent in heavy metal contaminants process.At present, slag is used as heavy metal Cr (VI) adsorbent, there is the problem of following two aspects:
study discovery by experiment, directly by the poor effect of slag adsorption treatment containing the effluent containing heavy metal ions of Cr (VI), its eliminating rate of absorption is about 30%;
the slag sorbing material of current exploitation is the feature utilizing slag density large substantially, in direct input waste water, the slag after absorption Cr (VI) is made to be deposited in the bottom, and do not do other any process, As time goes on, being adsorbed onto Cr (VI) in slag can stripping again, and the heavy metal ion such as iron, lead, mercury itself contained in slag also can stripping, causes secondary pollution.How make that slag is recyclable while its absorption Cr (VI) efficiency of raising even to be reused by carrying out process to slag, avoiding secondary pollution, is the important content studied as Cr (VI) adsorbent by slag at present.
Summary of the invention
Object of the present invention aims to provide and does not a kind ofly produce secondary pollution, novel C r (VI) adsorbent that can reuse and preparation method thereof.This adsorbent is prepared from through modification by slag, not only can increase substantially the Adsorption ability of slag to Cr (VI), and this adsorbent does not scatter in waste water, after reaching adsorption equilibrium, Separation of Solid and Liquid, isolated steel slag particle can reuse after pickling.
Concrete steps of the present invention are as follows:
(1) adopt jaw crusher or hand breaking that block steel slag is broken into fritter, then adopt vibromill by steel slag grinding, sieve, obtain average grain diameter at the slag of about 8 μm.
(2) take the slag obtained in 100g step 1 and mix 30 ~ 40% modifier As, compound is placed in agitated kettle and is uniformly mixed, then add the water mix of 30% ~ 40%, after mix is even, make 3 ~ 5mm steel slag particle.
(3) by after steel slag particle obtained in step (2) under field conditions (factors) more than slaking 48h, put into Muffle furnace and cool after roasting 3 ~ 5h at 600 DEG C ~ 800 DEG C, obtain steel slag particle, be i.e. novel C r (VI) adsorbent.
Adsorbent using method: take the steel slag particle that certain mass step (3) is obtained, be placed in containing Cr (VI) waste water solution reaction bulb, adopts and stirs fully mixing.After reaching adsorption equilibrium, Separation of Solid and Liquid, isolated steel slag particle, takes out after putting into hydrochloric acid (concentration is 6mol/L) the immersion 2h of 1:1, with distilled water drip washing 5 times, reusable after drying under being placed on drying box.
Slag in the present invention is converter slag.
Modifier A in the present invention is sodium bentonite.
The invention has the advantages that:
(1) this invention exploits the high value added utilization of this trade waste of slag, reach the object of " treatment of wastes with processes of wastes against one another ", make Comprehensive Utilization of Steel Slag, there is good economic benefit and environmental benefit.
(2) novel C r (VI) the absorbent preparation technique in the present invention is simple, the steel slag particle of the 3 ~ 5mm prepared, the ability of Adsorption Cr (VI) increases considerably (bringing up to 80% from 30%), repeatedly adsorb, in waste water, Cr (VI) concentration can reach industrial wastewater discharge requirement (Cr (VI) concentration≤0.1mg/L).
(3) novel C r (VI) adsorbent that prepared by the present invention does not scatter in waste water, recyclable, can reuse, can not cause secondary pollution to water body after pickling.
Detailed description of the invention
Below in conjunction with detailed description of the invention, only the invention will be further described, instead of limiting the scope of the invention.
embodiment 1
(1) adopt jaw crusher or hand breaking that block steel slag is broken into fritter, then adopt vibromill by after steel slag grinding, sieve, obtain average grain diameter at the slag powder of about 8 μm.
(2) take 100g slag and mix 30g modifier A, compound is placed in agitated kettle and is uniformly mixed, add 30g distilled water and mix and stir, after mix is even, make 3 ~ 5mm steel slag particle.
(3) by after steel slag particle obtained in step (2) under field conditions (factors) more than slaking 48h, put into Muffle furnace and cool after roasting 3h at 600 DEG C, the steel slag particle obtained, be i.e. novel C r (VI) adsorbent.
(4) take 3g steel slag particle in the beaker of 500mL, then to measure 100mL concentration be in 100mg/L Cr (VI) solution, reaction temperature is (25 ± 2) DEG C.After stirring 90min by electric blender respectively with constant speed, filter, sampling, adopt atomic absorption spectrophotometer to measure Cr (VI) concentration in solution.Now, steel slag particle goes the eliminating rate of absorption of Cr (VI) to be 85.6%.Steel slag particle reuses 2 times after reclaiming pickling, and it is 85.0% to the eliminating rate of absorption of Cr (VI).
embodiment 2
(1) adopt jaw crusher or hand breaking that block steel slag is broken into fritter, then adopt vibromill by steel slag grinding, sieve, obtain average grain diameter at the slag powder of about 8 μm.
(2) take 100g slag and mix 30g modifier A, compound is placed in agitated kettle and is uniformly mixed, add 35g distilled water, after mix is even, make 3 ~ 5mm steel slag particle.
(3) by after steel slag particle obtained in step (2) under field conditions (factors) more than slaking 48h, put into Muffle furnace and cool after roasting 4h at 700 DEG C, the steel slag particle obtained, be i.e. novel C r (VI) adsorbent.
(4) take 3g steel slag particle in the beaker of 500mL, then to measure 100mL concentration be in 100mg/L Cr (VI) solution, reaction temperature is (25 ± 2) DEG C.After stirring 90min by electric blender respectively with constant speed, filter, sampling, adopt atomic absorption spectrophotometer to measure Cr (VI) concentration in solution.Now, steel slag particle goes the eliminating rate of absorption of Cr (VI) to be 81.0%.Steel slag particle reuses 2 times after reclaiming pickling, and it is 80.3% to the eliminating rate of absorption of Cr (VI).
embodiment 3
(1) adopt jaw crusher or hand breaking that block steel slag is broken into fritter, then adopt vibromill by after steel slag grinding, sieve, obtain average grain diameter at the slag powder of about 8 μm.
(2) take 100g slag and mix 35g modifier A, compound is uniformly mixed in agitated kettle, add 40g distilled water, after mix is even, make 3 ~ 5mm steel slag particle.
(3) by after steel slag particle obtained in step (2) under field conditions (factors) more than slaking 48h, put into Muffle furnace and cool after roasting 4h at 600 DEG C, the steel slag particle obtained, be i.e. novel C r (VI) adsorbent.
(4) take 3g steel slag particle in the beaker of 500mL, then to measure 100mL concentration be in 100mg/L Cr (VI) solution, reaction temperature is (25 ± 2) DEG C.After stirring 90min by electric blender respectively with constant speed, filter, sampling, adopt atomic absorption spectrophotometer to measure Cr (VI) concentration in solution.Now, steel slag particle goes the eliminating rate of absorption of Cr (VI) to be 83.2%.Steel slag particle reuses 2 times after reclaiming pickling, and it is 82.5% to the eliminating rate of absorption of Cr (VI).
Claims (1)
1. a preparation method for Cr (VI) adsorbent, is characterized in that the method mainly comprises the following steps:
(1) adopt jaw crusher or hand breaking that block steel slag is broken into fritter, then adopt vibromill by steel slag grinding, sieve, obtain average grain diameter at the slag of about 8 μm;
(2) take the slag obtained in 100g step 1 and mix 30 ~ 40% modifier As, compound is placed in agitated kettle and is uniformly mixed, then add the water mix of 30 ~ 40%, after mix is even, make 3 ~ 5mm steel slag particle;
(3) by after steel slag particle obtained in step (2) under field conditions (factors) more than slaking 48h, put into Muffle furnace and cool after roasting 3-5h at 600 DEG C ~ 800 DEG C, obtain steel slag particle, be i.e. novel C r (VI) adsorbent;
Adsorbent using method: take the steel slag particle that certain mass step (3) is obtained, be placed in containing Cr (VI) waste water solution reaction bulb, adopt and stir fully mixing, after reaching adsorption equilibrium, Separation of Solid and Liquid, isolated steel slag particle, the concentration putting into 1:1 is take out after the hydrochloric acid of 6mol/L soaks 2h, with distilled water drip washing 5 times, reusable after drying under being placed on drying box; Described modifier A is sodium bentonite; Described slag is converter slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119161.8A CN103182292B (en) | 2013-04-08 | 2013-04-08 | Novel Cr (VI) adsorbent and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310119161.8A CN103182292B (en) | 2013-04-08 | 2013-04-08 | Novel Cr (VI) adsorbent and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103182292A CN103182292A (en) | 2013-07-03 |
| CN103182292B true CN103182292B (en) | 2014-12-17 |
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| CN201310119161.8A Expired - Fee Related CN103182292B (en) | 2013-04-08 | 2013-04-08 | Novel Cr (VI) adsorbent and preparation method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105251446B (en) * | 2015-11-11 | 2018-02-02 | 中国电建集团中南勘测设计研究院有限公司 | A kind of underground water Compound Heavy Metals repair materials |
| CN106824051B (en) * | 2017-02-27 | 2019-03-29 | 北京科技大学 | A kind of preparation method of nitrate adsorbent |
| CN106943991A (en) * | 2017-04-21 | 2017-07-14 | 河北大学 | A kind of dephosphorization modified steel scoria haydite and preparation method and application |
| CN108854940A (en) * | 2018-07-16 | 2018-11-23 | 南华大学 | A kind of modified steel scoria adsorbent and application for uranium-containing waste water processing |
| CN113457616A (en) * | 2021-06-28 | 2021-10-01 | 句容康泰膨润土有限公司 | Preparation of bentonite-steel slag adsorbent and method for treating heavy metal ions by using bentonite-steel slag adsorbent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716487A (en) * | 2009-12-31 | 2010-06-02 | 成都信息工程学院 | Steel slag composite adsorbing agent and method for processing printing and dyeing wastewater |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716487A (en) * | 2009-12-31 | 2010-06-02 | 成都信息工程学院 | Steel slag composite adsorbing agent and method for processing printing and dyeing wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 钢渣颗粒对水中Cr(Ⅵ)的吸附与还原作用;杨慧芬等;《过程工程学报》;20080630;第8卷(第3期);499-503 * |
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| CN103182292A (en) | 2013-07-03 |
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