CN102600803A - Preparation method for adsorbent for treating wastewater containing heavy metal - Google Patents
Preparation method for adsorbent for treating wastewater containing heavy metal Download PDFInfo
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- CN102600803A CN102600803A CN2012100730927A CN201210073092A CN102600803A CN 102600803 A CN102600803 A CN 102600803A CN 2012100730927 A CN2012100730927 A CN 2012100730927A CN 201210073092 A CN201210073092 A CN 201210073092A CN 102600803 A CN102600803 A CN 102600803A
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- adsorbent
- heavy metal
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- wastewater treatment
- containing wastewater
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 56
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002351 wastewater Substances 0.000 title abstract description 10
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000010865 sewage Substances 0.000 claims abstract description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 239000011651 chromium Substances 0.000 claims abstract description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 238000012869 ethanol precipitation Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 24
- 238000004065 wastewater treatment Methods 0.000 claims description 23
- 239000006228 supernatant Substances 0.000 claims description 17
- 238000001179 sorption measurement Methods 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 238000002386 leaching Methods 0.000 claims description 11
- 230000001133 acceleration Effects 0.000 claims description 9
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052785 arsenic Inorganic materials 0.000 claims description 3
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000008021 deposition Effects 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 238000003723 Smelting Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 2
- 230000000274 adsorptive effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000007385 chemical modification Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 206010013786 Dry skin Diseases 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- 239000011656 manganese carbonate Substances 0.000 description 1
- 235000006748 manganese carbonate Nutrition 0.000 description 1
- 229940093474 manganese carbonate Drugs 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- 229910000016 manganese(II) carbonate Inorganic materials 0.000 description 1
- XMWCXZJXESXBBY-UHFFFAOYSA-L manganese(ii) carbonate Chemical compound [Mn+2].[O-]C([O-])=O XMWCXZJXESXBBY-UHFFFAOYSA-L 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229960001763 zinc sulfate Drugs 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a preparation method for an adsorbent for treating wastewater containing heavy metal. The adsorbent for treating wastewater containing heavy metal is prepared according to the following steps of: taking dewatered sludge of an urban domestic sewage treatment plant as a raw material, and then performing alkali liquor extraction, ethanol precipitation, centrifugal separation, low-temperature drying, and the like. The adsorbent has higher adsorptive capacity for heavy metal, such as mercury, cadmium, chromium, lead, and the like, in the wastewater; the adsorbent is applied to the treatment for the wastewater containing heavy metal in the industries, such as nonferrous metal selecting and separating, smelting, chemicals preparing and processing, and the like; the adsorbent has the advantages of low cost and excellent treating effect; and the adsorbent has significance in realizing the standard discharging and recycling of the wastewater containing heavy metal and has excellent popularizing and applying prospect.
Description
Technical field
The present invention relates to a kind of preparation of sorbing material of heavy metal-containing wastewater treatment, relate in particular to a kind of preparation of adsorbent method that is used for heavy metal-containing wastewater treatment.
Background technology
The dewatered sludge of city domestic sewage treatment plant has the advantages that output is big, content of organics is high, is that a kind of good adsorbent prepares raw material.Because the prepared adsorbent that obtains of dewatered sludge has stronger heavy metal adsorption capacity, and it is cheap, therefore, becomes the new focus of heavy metal containing wastewater treatment technical research in recent years.
At present, with the dewatered sludge be the mainly preparation of the method through chemical modification of heavy metal containing wastewater treatment adsorbent of raw material.Through in dewatered sludge, adding medicaments such as certain density NaOH, manganese carbonate, manganese acetate, zinc sulfate, dewatered sludge is carried out surface modification, make it possess heavy metal ion adsorbed ability.Yet there are some common defectives in existing dewatered sludge chemical modification method.At first, it is low that the adsorbent for preparing through these method of modifying has an effective component content, the problem that sludge yield is big.These adsorbents are the dewatered sludge residues through obtaining after the chemical modification; During mainly forming, it contains the inorganic matter lower than the multi-metal adsorption capacity; Cause the dewatered sludge residue to be applied to have the big problem of sludge containing heavy metal output in the actual heavy metal-containing wastewater treatment process as adsorbent, the treatment and disposal that is enriched with the adsorbent of heavy metal in a large number has higher secondary pollution risk.Secondly, the absorption of the prepared ABSORBENTS ABSORPTION metal ion that obtains of existing chemical modification method removal ability also remains further to be improved.
Summary of the invention
The purpose of this invention is to provide a kind of efficient, preparation of adsorbent method that is used for heavy metal-containing wastewater treatment that cost is low.
The objective of the invention is to realize through following technical scheme:
The preparation of adsorbent method that is used for heavy metal-containing wastewater treatment of the present invention comprises step:
A, choosing moisture content that city domestic sewage treatment plant produced, to be lower than 80% dewatered sludge be raw material;
B, said dewatered sludge is used aqueous slkali soaking, obtain the leaching mixture, be used for effective adsorption component of said dewatered sludge is extracted;
C, said leaching mixture is centrifugalized, choose centrifuged supernatant, be used for being further purified effective adsorption component;
D, employing ethanol precipitation obtain the adsorbent suspension with the effective adsorption component deposition in the said centrifuged supernatant;
E, said adsorbent suspension is further centrifugalized processing, abandoning supernatant obtains the adsorbent sediment;
F, said adsorbent sediment is carried out dried, the material that drying obtains is the adsorbent that finally prepares.
Technical scheme by the invention described above provides can be found out; The preparation of adsorbent method that is used for heavy metal-containing wastewater treatment provided by the invention; Because choosing moisture content that city domestic sewage treatment plant produced, to be lower than 80% dewatered sludge be raw material; Through processing such as aqueous slkali soaking, precipitation with alcohol, centrifugation, dryings, obtain final adsorbent.Can realize in the dewatered sludge heavy metal ion is had the recovery of the active ingredient of adsorption capacity to greatest extent, improve content of effective in the adsorbent.This adsorbent has stronger adsorption capacity to heavy metals such as Mercury in Wastewater, cadmium, chromium, lead; Can be applied to the heavy metal-containing wastewater treatment of industries such as non-ferrous metal selecting and purchasing, smelting, chemicals manufacturing and processing; It is low to have cost; The advantage that treatment effect is good, significant for the qualified discharge and the reuse that realize heavy metal-containing waste water, have good popularizing application prospect.
The specific embodiment
To do to describe in detail further to the embodiment of the invention below.
The preparation of adsorbent method that is used for heavy metal-containing wastewater treatment of the present invention, its preferable specific embodiment comprises step:
A, choosing moisture content that city domestic sewage treatment plant produced, to be lower than 80% dewatered sludge be raw material;
B, said dewatered sludge is used aqueous slkali soaking, obtain the leaching mixture, be used for effective adsorption component of said dewatered sludge is extracted;
C, said leaching mixture is centrifugalized, choose centrifuged supernatant, be used for being further purified effective adsorption component;
D, employing ethanol precipitation obtain the adsorbent suspension with the effective adsorption component deposition in the said centrifuged supernatant;
E, said adsorbent suspension is further centrifugalized processing, abandoning supernatant obtains the adsorbent sediment;
F, said adsorbent sediment is carried out dried, the material that drying obtains is the adsorbent that finally prepares.
In the described steps A, various content of beary metal limit values are in the said dewatered sludge:
Cadmium≤5mg/Kg, mercury≤5mg/Kg, lead≤200mg/Kg, chromium≤100mg/Kg, arsenic≤25mg/Kg, copper≤100mg/Kg, zinc≤100mg/Kg, nickel≤100mg/Kg.
Among the described step B; Said aqueous slkali is NaOH or potassium hydroxide solution; The mass concentration of said NaOH or potassium hydroxide solution is 0.5%～30%g/g, and the mass ratio of said dewatered sludge and aqueous slkali is 1: 4～7, and reaction temperature is 15～50 ℃.Preferably: the mass concentration of said NaOH or potassium hydroxide solution is 5%g/g, and the mass ratio of said dewatered sludge and aqueous slkali is 1: 5, and reaction temperature is 25 ℃.
Among the described step C, the centrifugal acceleration of leaching mixture is 5000 * g (g=9.8m/s
2, down with), temperature is that 4～25 ℃, centrifugation time are 15～25min.The centrifuging temperature of preferred leaching mixture is 4 ℃.
Among the described step D, the volume ratio of the ethanol of centrifuged supernatant and mass content>=95% is 1: 3～5, temperature≤25 ℃ of control mixed liquor.The volume ratio of the ethanol of preferred centrifuged supernatant and mass content >=95% is 1: 4.
In the described step e, centrifugal acceleration is 6000～8000 * g, and operating temperature is 4～25 ℃.Preferred centrifugal acceleration 6000 * g.
In the described step F, baking temperature is 15～55 ℃.Preferred baking temperature is 25 ℃.
Advantage of the present invention and meaning are:
(1) through the combining of processing modes such as alkali lye lixiviate processing, precipitation with alcohol and centrifugation, realized in the dewatered sludge heavy metal ion is had the recovery of the active ingredient of adsorption capacity to greatest extent, improved content of effective in the adsorbent.
(2) this adsorbent has the characteristics of active constituent content height, high adsorption capacity; Reduced the use amount of adsorbent; Reduced adsorbent at the sludge yield that is used for actual heavy metal-containing wastewater treatment process; Reduced the Treatment of Sludge expense, and sludge containing heavy metal is disposed the secondary pollution risk that exists.
(3) this adsorbent has stronger adsorption capacity to heavy metals such as Mercury in Wastewater, cadmium, chromium, lead; Can be applied to the heavy metal-containing wastewater treatment of industries such as non-ferrous metal selecting and purchasing, smelting, chemicals manufacturing and processing; It is low to have cost; The advantage that treatment effect is good, significant for the qualified discharge and the reuse that realize heavy metal-containing waste water.
Specific embodiment:
May further comprise the steps:
(1) choosing moisture content that city domestic sewage treatment plant produced, to be lower than 80% dewatered sludge be raw material, and various content of beary metal limit values are cadmium≤5mg/Kg, mercury≤5mg/Kg, lead≤200mg/Kg, chromium≤100mg/Kg, arsenic≤25mg/Kg, copper≤100mg/Kg, zinc≤100mg/Kg, nickel≤100mg/Kg in the dewatered sludge.
(2) constitutive property can be reached desired dewatered sludge is added in the NaOH or potassium hydroxide solution that mass concentration is 0.5%～30% (g/g) in the step (1), the mass ratio of dewatered sludge and aqueous slkali is 1: 4～7.Then with this mixture under 15～50 ℃ temperature conditions, soak 24h, obtain leaching mixture.
(3) will leach mixture is that 5000 * g, temperature are to carry out centrifugal treating under 4～25 ℃ the condition in centrifugal acceleration, and centrifugation time is 15～25min.Getting the centrifugal supernatant that obtains is used to be further purified.
(4) centrifuged supernatant that step (3) is obtained is slowly mixed according to the ratio of volume ratio 1: 3～5 with the ethanol of content>=95%, and temperature≤25 ℃ of control mixed liquor obtain the adsorbent suspension in the mixed process.
(5) the adsorbent suspension is carried out centrifugal treating once more, centrifugal acceleration is that 6000～8000 * g, temperature are 4～25 ℃, discards centrifuged supernatant, and taking precipitate is used for dried.
(6) centrifugal sediment is placed under the condition of 15～55 ℃ of temperature carry out dried, the dried dry that finally obtains is adsorbent.
The mass concentration of NaOH or potassium hydroxide solution is between 0.5%～30% (g/g) in the step (2), preferred 5% (g/g); The mass ratio of dewatered sludge and aqueous slkali is between 1: 4～7, preferred 1: 5; Reaction temperature is between 15～50 ℃, preferred 25 ℃.
The centrifuging temperature condition can be between 4～25 ℃ in the step (3), preferred 4 ℃.
The volume ratio of centrifuged supernatant and ethanol can be between 1: 3～5 in the step (4), preferred 1: 4.
Centrifugal acceleration is 6000～8000 * g, preferred 6000 * g in the step (5).
Baking temperature is between 15～55 ℃ in the step (6), preferred 25 ℃.
The above; Be merely the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. a preparation of adsorbent method that is used for heavy metal-containing wastewater treatment is characterized in that, comprises step:
A, choosing moisture content that city domestic sewage treatment plant produced, to be lower than 80% dewatered sludge be raw material;
B, said dewatered sludge is used aqueous slkali soaking, obtain the leaching mixture, be used for effective adsorption component of said dewatered sludge is extracted;
C, said leaching mixture is centrifugalized, choose centrifuged supernatant, be used for being further purified effective adsorption component;
D, employing ethanol precipitation obtain the adsorbent suspension with the effective adsorption component deposition in the said centrifuged supernatant;
E, said adsorbent suspension is further centrifugalized processing, abandoning supernatant obtains the adsorbent sediment;
F, said adsorbent sediment is carried out dried, the material that drying obtains is the adsorbent that finally prepares.
2. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 1 is characterized in that, in the described steps A, various content of beary metal limit values are in the said dewatered sludge:
Cadmium≤5mg/Kg, mercury≤5mg/Kg, lead≤200mg/Kg, chromium≤100mg/Kg, arsenic≤25mg/Kg, copper≤100mg/Kg, zinc≤100mg/Kg, nickel≤100mg/Kg.
3. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 1; It is characterized in that; Among the described step B, said aqueous slkali is NaOH or potassium hydroxide solution, and the mass concentration of said NaOH or potassium hydroxide solution is 0.5%～30%g/g; The mass ratio of said dewatered sludge and aqueous slkali is 1: 4～7, and reaction temperature is 15～50 ℃.
4. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 3; It is characterized in that; Among the described step B; The mass concentration of said NaOH or potassium hydroxide solution is 5%g/g, and the mass ratio of said dewatered sludge and aqueous slkali is 1: 5, and reaction temperature is 25 ℃.
5. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 1; It is characterized in that; Among the described step C, the centrifugal acceleration that the leaching mixture is carried out centrifugal treating is that 5000 * g, temperature are that 4～25 ℃, centrifugation time are 15～25min.
6. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 5 is characterized in that, among the described step C, the centrifugal operating temperature of leaching mixture is 4 ℃.
7. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 1 is characterized in that, among the described step D, the volume ratio of the ethanol of centrifuged supernatant and mass content>=95% is 1: 3～5, temperature≤25 ℃ of control mixed liquor.
8. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 7 is characterized in that, among the described step D, the volume ratio of the ethanol of centrifuged supernatant and mass content >=95% is 1: 4.
9. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 1 is characterized in that, in the described step e, centrifugal acceleration is 6000～8000 * g, and operating temperature is 4～25 ℃;
In the described step F, baking temperature is 15～55 ℃.
10. the preparation of adsorbent method that is used for heavy metal-containing wastewater treatment according to claim 9 is characterized in that, in the described step e, centrifugal acceleration is 6000 * g;
In the described step F, baking temperature is 25 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100730927A CN102600803A (en) | 2012-03-19 | 2012-03-19 | Preparation method for adsorbent for treating wastewater containing heavy metal |
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| CN2012100730927A CN102600803A (en) | 2012-03-19 | 2012-03-19 | Preparation method for adsorbent for treating wastewater containing heavy metal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611498A (en) * | 2013-12-11 | 2014-03-05 | 南通大学 | Novel adsorbent for absorbing multiple heavy metals and preparation method thereof |
| CN109759003A (en) * | 2017-11-09 | 2019-05-17 | 湖南永清环保研究院有限责任公司 | Application of the haydite adsorbent material in processing arsenic-containing waste water |
| CN111905693A (en) * | 2020-06-23 | 2020-11-10 | 华南理工大学 | Two-dimensional nitrogen-doped magnetic Fe based on dewatered sludge3C/C adsorbent and preparation thereof |
| CN112875848A (en) * | 2021-01-14 | 2021-06-01 | 华南理工大学 | Alkali pretreatment activated sludge adsorbent and preparation method and application thereof |
-
2012
- 2012-03-19 CN CN2012100730927A patent/CN102600803A/en active Pending
Non-Patent Citations (4)
| Title |
|---|
| 《上海交通大学博士学位论文》 20091231 郑燕 "含重金属废水、低浊度废水净化剂的制备及应用研究" , * |
| 《哈尔滨工业大学博士学位论文》 20070531 郑蕾 "活性污泥胞外聚合物吸附重金属效能与机制研究" , * |
| 郑燕: ""含重金属废水、低浊度废水净化剂的制备及应用研究"", 《上海交通大学博士学位论文》 * |
| 郑蕾: ""活性污泥胞外聚合物吸附重金属效能与机制研究"", 《哈尔滨工业大学博士学位论文》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611498A (en) * | 2013-12-11 | 2014-03-05 | 南通大学 | Novel adsorbent for absorbing multiple heavy metals and preparation method thereof |
| CN103611498B (en) * | 2013-12-11 | 2015-09-09 | 南通清波环保科技有限公司 | The new adsorbent and preparation method thereof of various heavy in a kind of adsorbed water |
| CN109759003A (en) * | 2017-11-09 | 2019-05-17 | 湖南永清环保研究院有限责任公司 | Application of the haydite adsorbent material in processing arsenic-containing waste water |
| CN111905693A (en) * | 2020-06-23 | 2020-11-10 | 华南理工大学 | Two-dimensional nitrogen-doped magnetic Fe based on dewatered sludge3C/C adsorbent and preparation thereof |
| CN112875848A (en) * | 2021-01-14 | 2021-06-01 | 华南理工大学 | Alkali pretreatment activated sludge adsorbent and preparation method and application thereof |
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Application publication date: 20120725 |