CN101780395A - Attapulgite water oil stain absorbent - Google Patents
Attapulgite water oil stain absorbent Download PDFInfo
- Publication number
- CN101780395A CN101780395A CN200910231813A CN200910231813A CN101780395A CN 101780395 A CN101780395 A CN 101780395A CN 200910231813 A CN200910231813 A CN 200910231813A CN 200910231813 A CN200910231813 A CN 200910231813A CN 101780395 A CN101780395 A CN 101780395A
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- CN
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- Prior art keywords
- concave
- attapulgite
- clay rod
- convex clay
- oil stain
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 229960000892 attapulgite Drugs 0.000 title claims abstract description 40
- 229910052625 palygorskite Inorganic materials 0.000 title claims abstract description 40
- 239000002250 absorbent Substances 0.000 title claims abstract description 35
- 230000002745 absorbent Effects 0.000 title claims abstract description 35
- 239000004927 clay Substances 0.000 claims abstract description 63
- 239000002699 waste material Substances 0.000 claims abstract description 19
- 229940010698 activated attapulgite Drugs 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000011347 resin Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 14
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims abstract description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 26
- 239000006260 foam Substances 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 16
- 229920003023 plastic Polymers 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 claims description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 230000020477 pH reduction Effects 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 6
- 239000011265 semifinished product Substances 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 3
- 239000001913 cellulose Substances 0.000 claims description 3
- 229920002678 cellulose Polymers 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 238000005065 mining Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 48
- 238000010521 absorption reaction Methods 0.000 abstract description 10
- 239000002480 mineral oil Substances 0.000 abstract description 5
- 235000010446 mineral oil Nutrition 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 238000001723 curing Methods 0.000 abstract description 2
- 239000000839 emulsion Substances 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002984 plastic foam Substances 0.000 abstract 1
- 230000007928 solubilization Effects 0.000 abstract 1
- 238000005063 solubilization Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 2
- 241000238557 Decapoda Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000013530 defoamer Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses an attapulgite water oil stain absorbent which comprises high-viscosity attapulgite clay, activated attapulgite clay, waste plastic foam, super oil absorbent resin and glycerin monostearate. The ingredients are added into a stirrer for stirring and then packaged into the finished product of the attapulgite water oil stain absorbent after being uniformly stirred. The attapulgite water oil stain absorbent has better emulsion, solubilization, purification, absorption and curing functions, and can rapidly absorb and clean the oil stains on the surface. The oil stains on the surface are absorbed by the attapulgite water oil stain absorbent and then converted into a gel matter which can be regenerated into a combustible mineral oil. The attapulgite water oil stain absorbent can not only eliminate the petrol pollution and protect the environment, but also can fully recycle the waste materials for saving resources. The attapulgite water oil stain absorbent is suitable for absorbing and cleaning the oil stains.
Description
Technical field
The present invention relates to adsorbent, be specifically related to a kind of attapulgite water oil stain absorbent.
Background technology
Along with the development of oil cause, oily substance is more and more serious to the pollution of water body, the seepage of admiralty fuel oil, and the various mineral oil of industry and domestic life discharging make the soul-stirring and very big concern of common people to sea area, environmental pollution that river waters caused.
Greasy dirt covers on the water surface, can completely cut off the oxygen of water body, the existence of fish and shrimp in the water and water plant is caused seriously influence, fish and shrimp meeting death because of anoxic, plant also can influence photosynthesis and death because of being hindered illumination, and this can exert an influence to water body purification.There are some poisonous and hazardous materials can the growth of aquatic animals and plants directly be worked the mischief in the greasy dirt.
Because greasy dirt is the floating water surface that is dispersed in, there not be fixing position, bring a difficult problem for the work of processing water oil stain, adopt chemical agent to make the greasy dirt accelerated decomposition mostly, formation can be melt into the small sphere in the water.The oil suction of the suction machine of employing is also arranged,, stop the greasy dirt diffusion with oily cable, but actual result of use is unsatisfactory with boom and skimmer frizing.
Summary of the invention
The objective of the invention is to overcome weak point in the prior art, a kind of attapulgite water oil stain absorbent is provided.
Attapulgite water oil stain absorbent is made up of the sticking Concave-convex clay rod of height, activated attapulgite, waste or used plastics foam, high oil-absorbing resin and glycerin monostearate.
Concave-convex clay rod has higher plasticity under moisture situation, good stability in high temperature and salt solution, density is little, Concave-convex clay rod is viscosity when moist, its viscosity can reach more than the 3000mPas, the dry post-shrinkage ratio of Concave-convex clay rod is little, and does not produce be full of cracks, and the hardness of Concave-convex clay rod is Mohs 2～3 degree.
High sticking Concave-convex clay rod is the Concave-convex clay rod that adopts the processing technology production that improves viscosity of attapulgite clay, high sticking Concave-convex clay rod is used for the gel object that the present invention helps forming behind sump oil on the water surface and the sewage and adheres to each other, and is convenient to focus on.
Activated attapulgite, being to add in the Concave-convex clay rod raw ore with sulfuric acid to carry out acidifying, is activated attapulgite through high-temperature roasting, after the acidified modified processing of Concave-convex clay rod again, have absorption and decoloration performance preferably, help purifying the quality of the water surface.
The waste or used plastics foam has light weight and excellent water tolerance, can swim in for a long time on the water surface, be used for when of the present invention, help expanding the oil suction scope of high oil-absorbing resin, accelerate the speed and the oil absorption of attapulgite water oil stain absorbent absorption greasy dirt, the waste or used plastics foam can also the regenerative process after attapulgite water oil stain absorbent adsorbs greasy dirt in, improve the output and the quality of reclaimed oil.
High oil-absorbing resin has, and but the strong oil suction kind of oil absorption is many, heat endurance and the good characteristics of guarantor's oiliness energy, help the convenient greasy dirt that reclaims, because the high oil-absorbing resin quality is too light, when simple use high oil-absorbing resin adsorbs water oil stain, high oil-absorbing resin can be blown to four winds, do not reach desirable effect, be used for when of the present invention, high oil-absorbing resin is mixed into one with high sticking Concave-convex clay rod, activated attapulgite, waste or used plastics foam and glycerin monostearate, and the sump oil on the water surface being absorbed rapidly expands is converted into the gel object.
Glycerin monostearate is the waxy solid of a kind of pure white to light lacteous, performance with defoamer, dispersant, thickener, wetting agent and emulsifying agent, be water-in-oil emulsifier, can be dissolved in the mineral oil, effect by means of hydrodynamic force or mechanical force, impel mineral oil emulsification to be dispersed into fine particle, be beneficial to improve the ability of attapulgite water oil stain absorbent absorption greasy dirt.
The present invention is achieved by following technical proposals:
The batching of attapulgite water oil stain absorbent is made up of following component by weight percentage: high sticking Concave-convex clay rod 30～45%, activated attapulgite 20～35%, waste or used plastics foam 15～25%, high oil-absorbing resin 1～30% and glycerin monostearate 0.1～5%;
The production method of attapulgite water oil stain absorbent: stir in the batching input mixer with attapulgite water oil stain absorbent, be packaged as the finished product of attapulgite water oil stain absorbent after stirring.
The sticking Concave-convex clay rod of described height is the Concave-convex clay rod that adopts the processing technology production that improves viscosity of attapulgite clay, it is characterized in that, and from the Concave-convex clay rod of mining area exploitation, need be through 30～120 days natural weathering; Modification processing method is: calculate by weight percentage, take from the Concave-convex clay rod 94～98% after the right weathering, evenly add 2～6% sodium carbonate, import jointly in the fermentation vat, add clear water and soak ageing, soak time is 72～120 hours; Get the Concave-convex clay rod after the immersion, stir in the input mixer, and the Concave-convex clay rod after will stirring, be extruded into thin slice through extruder, its THICKNESS CONTROL is at 0.5～2 millimeter, with the Concave-convex clay rod thin slice, carry out airing, the Concave-convex clay rod thin slice after the airing, its water content≤15%; Batching is calculated by weight percentage: the Concave-convex clay rod 94～98% after the airing, high hydroscopic resin 0.5～5% and cellulose 0.5～3%, above-mentioned batching is stirred, and carry out abrasive dust in the back input grinding machine that stirs, grain fineness≤0.074 millimeter.
Above-mentioned production technology is to adopt " improving the processing technology of viscosity of attapulgite clay " in application on June 20th, 2005 by the inventor, and the Chinese patent Granted publication number is: CN 1317067C, Granted publication day: on May 23rd, 2007.
The production method of described activated attapulgite is: the 1. preparation of dilute sulfuric acid, form by following component by weight percentage: the sulfuric acid 3～5% of concentration 98%, water 95～97%; 2. the batching of acidification, form by following component by weight percentage: Concave-convex clay rod raw ore 55～65%, dilute sulfuric acid 35～45% slowly adds dilute sulfuric acid and to carry out acidification in the Concave-convex clay rod raw ore; 3. extruding: with the Concave-convex clay rod after the acidifying, push by extruder and to be tablet, the thickness of tablet≤3 millimeter; 4. roasting: the tablet of Concave-convex clay rod is transported to and carries out roasting in the roaster, and roasting time is 1.5～3 hours, and sintering temperature is controlled at 320～450 ℃, and the Concave-convex clay rod tablet after the roasting is the activated attapulgite semi-finished product; 5. will the activated attapulgite semi-finished product carry out abrasive dust in the input grinding machine, grain fineness≤0.074 millimeter.
The processing method of described waste or used plastics foam: will the waste or used plastics foam pulverize grain fineness≤0.15 millimeter in the input waste or used plastics foam pulverizer.
Attapulgite water oil stain absorbent is dispensed onto needs to be handled by on the water surface of oil pollution, use the external force effect, allow greasy dirt contacts fully on attapulgite water oil stain absorbent and the water surface, be beneficial to the speed accelerating to adsorb, greasy dirt changes a kind of gel object into after being adsorbed by attapulgite water oil stain absorbent, gel object after the collection adsorption treatment is finished the absorption and the cleaning work of the greasy dirt water surface.
Attapulgite water oil stain absorbent has the effect of good emulsification, solubilising, purification, absorption and curing to greasy dirt, can be fast with the greasy dirt absorption of the water surface with clean out.
Water oil stain changes a kind of gel object into after being adsorbed by attapulgite water oil stain absorbent, and this gel object can carry out a kind of flammable mineral oil of regeneration.
Because attapulgite water oil stain absorbent is a kind of powder, and is easy to use, both can solve oil pollution, the protection environment can fully be recycled the waste and old material energy savings again, reduces white pollution, kills two birds with one stone.
Attapulgite water oil stain absorbent is applicable to absorption and cleaning water oil stain.
The specific embodiment
The invention will be further described below in conjunction with embodiment:
The batching of attapulgite water oil stain absorbent is made up of following component by weight percentage: high sticking Concave-convex clay rod 36%, activated attapulgite 28%, waste or used plastics foam 20%, high oil-absorbing resin 14% and glycerin monostearate 2%;
The production method of attapulgite water oil stain absorbent: stir in the batching input mixer with attapulgite water oil stain absorbent, be packaged as the finished product of attapulgite water oil stain absorbent after stirring.
The sticking Concave-convex clay rod of described height is the Concave-convex clay rod that adopts the processing technology production that improves viscosity of attapulgite clay, it is characterized in that, and from the Concave-convex clay rod of mining area exploitation, need be through 100 days natural weathering; Modification processing method is: calculate by weight percentage, take from the Concave-convex clay rod 97% after the right weathering, evenly add 3% sodium carbonate, import jointly in the fermentation vat, add clear water and soak ageing, soak time is 72 hours; Get the Concave-convex clay rod after the immersion, stir in the input mixer, and the Concave-convex clay rod after will stirring, be extruded into thin slice through extruder, its THICKNESS CONTROL is at 0.5～2 millimeter, with the Concave-convex clay rod thin slice, carry out airing, the Concave-convex clay rod thin slice after the airing, its water content≤15%; Batching is calculated by weight percentage: the Concave-convex clay rod 96% after the airing, high hydroscopic resin 2.5% and cellulose 1.5%, above-mentioned batching is stirred, and carry out abrasive dust in the back input grinding machine that stirs, grain fineness≤0.074 millimeter.
The production method of described activated attapulgite is: the 1. preparation of dilute sulfuric acid, form by following component by weight percentage: the sulfuric acid 3% of concentration 98%, water 97%; 2. the batching of acidification, form by following component by weight percentage: Concave-convex clay rod raw ore 58%, dilute sulfuric acid 42% slowly adds dilute sulfuric acid and to carry out acidification in the Concave-convex clay rod raw ore; 3. extruding: with the Concave-convex clay rod after the acidifying, push by extruder and to be tablet, the thickness of tablet≤3 millimeter; 4. roasting: the tablet of Concave-convex clay rod is transported to and carries out roasting in the roaster, and roasting time is 2 hours, and sintering temperature is controlled at 320～350 ℃, and the Concave-convex clay rod tablet after the roasting is the activated attapulgite semi-finished product; 5. will the activated attapulgite semi-finished product carry out abrasive dust in the input grinding machine, grain fineness≤0.074 millimeter.
The processing method of described waste or used plastics foam: will the waste or used plastics foam pulverize grain fineness≤0.15 millimeter in the input waste or used plastics foam pulverizer.
Claims (1)
1. attapulgite water oil stain absorbent, it is characterized in that the batching of attapulgite water oil stain absorbent is made up of following component by weight percentage: high sticking Concave-convex clay rod 30～45%, activated attapulgite 20～35%, waste or used plastics foam 15～25%, high oil-absorbing resin 1～30% and glycerin monostearate 0.1～5%;
The production method of described attapulgite water oil stain absorbent: stir in the batching input mixer with attapulgite water oil stain absorbent, be packaged as the finished product of attapulgite water oil stain absorbent after stirring;
The sticking Concave-convex clay rod of described height is the Concave-convex clay rod that adopts the processing technology production that improves viscosity of attapulgite clay, it is characterized in that, and from the Concave-convex clay rod of mining area exploitation, need be through 30～120 days natural weathering; Modification processing method is: calculate by weight percentage, take from the Concave-convex clay rod 94～98% after the right weathering, evenly add 2～6% sodium carbonate, import jointly in the fermentation vat, add clear water and soak ageing, soak time is 72～120 hours; Get the Concave-convex clay rod after the immersion, stir in the input mixer, and the Concave-convex clay rod after will stirring, be extruded into thin slice through extruder, its THICKNESS CONTROL is at 0.5～2 millimeter, with the Concave-convex clay rod thin slice, carry out airing, the Concave-convex clay rod thin slice after the airing, its water content≤15%; Batching is calculated by weight percentage: the Concave-convex clay rod 94～98% after the airing, high hydroscopic resin 0.5～5% and cellulose 0.5～3%, above-mentioned batching is stirred, and carry out abrasive dust in the back input grinding machine that stirs, grain fineness≤0.074 millimeter;
The production method of described activated attapulgite is: the 1. preparation of dilute sulfuric acid, form by following component by weight percentage: the sulfuric acid 3～5% of concentration 98%, water 95～97%; 2. the batching of acidification, form by following component by weight percentage: Concave-convex clay rod raw ore 55～65%, dilute sulfuric acid 35～45% slowly adds dilute sulfuric acid and to carry out acidification in the Concave-convex clay rod raw ore; 3. extruding: with the Concave-convex clay rod after the acidifying, push by extruder and to be tablet, the thickness of tablet≤3 millimeter; 4. roasting: the tablet of Concave-convex clay rod is transported to and carries out roasting in the roaster, and roasting time is 1.5～3 hours, and sintering temperature is controlled at 320～450 ℃, and the Concave-convex clay rod tablet after the roasting is the activated attapulgite semi-finished product; 5. will the activated attapulgite semi-finished product carry out abrasive dust in the input grinding machine, grain fineness≤0.074 millimeter;
The processing method of described waste or used plastics foam: will the waste or used plastics foam pulverize grain fineness≤0.15 millimeter in the input waste or used plastics foam pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102318130A CN101780395B (en) | 2009-12-08 | 2009-12-08 | Attapulgite water oil stain absorbent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102318130A CN101780395B (en) | 2009-12-08 | 2009-12-08 | Attapulgite water oil stain absorbent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101780395A true CN101780395A (en) | 2010-07-21 |
| CN101780395B CN101780395B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102318130A Expired - Fee Related CN101780395B (en) | 2009-12-08 | 2009-12-08 | Attapulgite water oil stain absorbent |
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| Country | Link |
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| CN (1) | CN101780395B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211135A (en) * | 2014-08-17 | 2014-12-17 | 青岛蓬勃石油技术服务有限公司 | Sea surface floating oil detersive and preparation method thereof |
| CN106378107A (en) * | 2016-09-21 | 2017-02-08 | 苏州佰思科节能环保科技有限公司 | Composite material for rapidly absorbing petroleum pollutant and preparation method thereof |
| CN109304148A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | A kind of oil spilling adsorption production based on catalytic cracking spent catalyst |
| CN114949939A (en) * | 2022-04-29 | 2022-08-30 | 广州安达净水材料有限公司 | Defoaming agent for landfill leachate evaporation and preparation method thereof |
| CN115888634A (en) * | 2022-12-31 | 2023-04-04 | 常州纳欧新材料科技有限公司 | High-strength water-resistant adsorbent and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1597088A (en) * | 2004-07-17 | 2005-03-23 | 兰州理工大学 | Preparation method of concave convex rod stone clay desulfur adsorption catalyst |
| CN1693425A (en) * | 2005-05-19 | 2005-11-09 | 许庆华 | Process for purifying waste diesel oil |
-
2009
- 2009-12-08 CN CN2009102318130A patent/CN101780395B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211135A (en) * | 2014-08-17 | 2014-12-17 | 青岛蓬勃石油技术服务有限公司 | Sea surface floating oil detersive and preparation method thereof |
| CN106378107A (en) * | 2016-09-21 | 2017-02-08 | 苏州佰思科节能环保科技有限公司 | Composite material for rapidly absorbing petroleum pollutant and preparation method thereof |
| CN109304148A (en) * | 2017-11-16 | 2019-02-05 | 中国石油化工股份有限公司 | A kind of oil spilling adsorption production based on catalytic cracking spent catalyst |
| CN114949939A (en) * | 2022-04-29 | 2022-08-30 | 广州安达净水材料有限公司 | Defoaming agent for landfill leachate evaporation and preparation method thereof |
| CN114949939B (en) * | 2022-04-29 | 2023-10-03 | 广州安达净水材料有限公司 | Defoaming agent for landfill leachate evaporation and preparation method thereof |
| CN115888634A (en) * | 2022-12-31 | 2023-04-04 | 常州纳欧新材料科技有限公司 | High-strength water-resistant adsorbent and preparation method thereof |
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|---|---|
| CN101780395B (en) | 2011-07-20 |
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