CN104275163A - Adsorbent for removing arsenic from drinking water, and preparation method of adsorbent - Google Patents
Adsorbent for removing arsenic from drinking water, and preparation method of adsorbent Download PDFInfo
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- CN104275163A CN104275163A CN201410507171.3A CN201410507171A CN104275163A CN 104275163 A CN104275163 A CN 104275163A CN 201410507171 A CN201410507171 A CN 201410507171A CN 104275163 A CN104275163 A CN 104275163A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
- B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
- B01J20/0251—Compounds of Si, Ge, Sn, Pb
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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Abstract
The invention relates to an adsorbent for removing arsenic from drinking water, and a preparation method of the adsorbent, belonging to the technical field of water treatment. The adsorbent comprises the following components in parts by weight: 2-5 parts of nano aluminium oxide, 1-3 parts of cationic polyacrylamide, 60-80 parts of bone charcoal, 30-50 parts of seaweed powder, 0.1-0.5 part of poly silicate aluminum ferric and 2-4 parts of polyvinyl acetal. The adsorbent is high in removal rate of arsenic in water, is good in particle strength and free from secondary pollution, and meets the demand of removing arsenic from water to reach the standard in China at present; furthermore, seaweed is taken as the raw material for preparing the adsorbent for removing arsenic, so that waste is recycled, the production cost is lowered, and the biologic chain in a sea water environment can be better protected; therefore, the adsorbent has important economic benefit and environmental benefit.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of Removal of Arsenic in Drinking Water adsorbent and preparation method thereof.
Background technology
The source that in water, arsenic pollutes has: (1) natural source: mineral and atmospheric disintegration of rocks, the eruption in volcano, the upper spilling water of hot spring; (2) artificial source: the exploitation of arsenide and smelting.These factors all cause very large pollution to underground water and drinking water.High arsenic drinking-water is mainly underground water.China drinks high arsenic water area and relates to 10 provinces such as Taiwan, Xinjiang, Inner Mongol, Tibet, Yunnan, Guizhou, Shanxi, Jilin, Yue30Ge county, and Endemic Arsenism Patients has appearred in these areas, and be mostly less, limit, poor and lack low arsenic water source area.
In natural stream networks, arsenic is mainly with Inorganic arsenates AsO4
3-with arsenite AsO3
3-two kinds of forms exist, or exist with the form of methylated arsenic compound, and the content of the organic compound of arsenic is general all very low.The arsenic compound of these different shapes occurs mutually to transform by chemistry and biological oxidation, the methylating of reduction and biology, demethylation.
The order that the toxicity size of all kinds of arsenic is successively decreased successively is: arsine (As
3-) > organo-arsenicization three hydroperoxide derivative (As
3-) the inorganic arsenite (As of >
3+) > organoarsenium compound (As
3+) > arsenic oxide arsenoxide (As
3+) > Inorganic arsenates (As
5+) > organoarsenium compound (As
5+) > metallic arsenic (As
0).
Arsenic compound has severe toxicity, easily at people's cylinder accumulation, causes arsenicalism.Domestic data is withered and is tabled look-up bright, and drinking arsenic content is for a long time in the crowd of 0.6mg/L water, and arsenic poisoning illness rate is up to 47.2%; Drinking arsenic content is for a long time in the crowd of 0.3 ~ 0.6mg/L water, and arsenic poisoning illness rate reaches 28.3%; Drinking arsenic content is for a long time in the crowd of 0.1 ~ 0.3mg/L water, and arsenic poisoning illness rate reaches 21.7%; Drinking arsenic content is for a long time that in the crowd of 0.1 below mg/L water, arsenic poisoning illness rate reaches 15.9 9/5; In arsenicalism patient, canceration rate is up to 15%.The highest standard for drinking value of the arsenic in water body of world health organisation recommendations is 0.0lmg/L, and the highest standard for drinking value of China is 0.05mg/L.According to the water arsenic standard of WHO, the exposure people of Chinese arsenic poisoning harm lesion is up to 1,500 ten thousand more than; Patient diagnosed exceedes tens of thousands of people.Therefore Arsenic Removal from Drinking Water is the key measure of control endemic arsenic poisoning.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, there is provided a kind of Removal of Arsenic in Drinking Water adsorbent and preparation method thereof, the clearance of this Removal of Arsenic in Drinking Water adsorbent to arsenic in water body is high, and granule strength is good, non-secondary pollution, meets the needs that current removal water body arsenic is up to state standards.
The technical solution used in the present invention is as follows:
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 2-5 part, PAMC 1-3 part, bone carbon 60-80 part, seawood meal 30-50 part, polymeric aluminium ferrum silicate 0.1-0.5 part, Pioloform, polyvinyl acetal 2-4 part;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 65-80 DEG C of water 3-8h together, dry at 50-70 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 20-30min, then be washed to neutrality, dry, to obtain final product.
Further preferably described Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 3 parts, PAMC 1.8 parts, 75 parts, bone carbon, seawood meal 40 parts, polymeric aluminium ferrum silicate 0.4 part, Pioloform, polyvinyl acetal 3 parts.
Further preferably described Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 4 parts, PAMC 2.5 parts, 63 parts, bone carbon, seawood meal 37 parts, polymeric aluminium ferrum silicate 0.2 part, Pioloform, polyvinyl acetal 2.5 parts.
The present invention also provides a kind of preparation method of Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), activates 2-3h by bone carbon and seawood meal at 380-420 DEG C;
Step (2), drips ethanol and constantly stirs, dissolving completely, obtain glue to Pioloform, polyvinyl acetal in Pioloform, polyvinyl acetal;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 50-70 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Mixing speed in technique scheme described in step (2) is 100-200r/min.
compared with prior art, its beneficial effect is in the present invention:(1) clearance of Removal of Arsenic in Drinking Water adsorbent of the present invention to arsenic in water body is high, and granule strength is good, wear-resistant, non-secondary pollution, meets the needs that current removal water body arsenic is up to state standards; (2) utilize marine alga as the raw material preparing arsenic-removing adsorption agent, achieve twice laid, reduce production cost, be conducive to biological chain in protection ocean water environment, there is important economic benefit and environmental benefit; (3) preparation method of the present invention is simple, is easy to apply.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 2 parts, PAMC 1 part, 60 parts, bone carbon, seawood meal 30 parts, polymeric aluminium ferrum silicate 0.1 part, Pioloform, polyvinyl acetal 2 parts;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 65 DEG C of water 8h together, dry at 50 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 20min, then be washed to neutrality, dry, to obtain final product;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon and seawood meal, at 420 DEG C, activates 3h;
Step (2), in above-mentioned Pioloform, polyvinyl acetal, drip ethanol and constantly stir, mixing speed is 200r/min, dissolves completely to Pioloform, polyvinyl acetal, obtains glue;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 70 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Embodiment 2
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 5 parts, PAMC 3 parts, 80 parts, bone carbon, seawood meal 50 parts, polymeric aluminium ferrum silicate 0.5 part, Pioloform, polyvinyl acetal 4 parts;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 80 DEG C of water 3h together, dry at 70 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 30min, then be washed to neutrality, dry, to obtain final product;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon and seawood meal, at 420 DEG C, activates 3h;
Step (2), in above-mentioned Pioloform, polyvinyl acetal, drip ethanol and constantly stir, mixing speed is 200r/min, dissolves completely to Pioloform, polyvinyl acetal, obtains glue;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 70 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Embodiment 3
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 3 parts, PAMC 1.8 parts, 75 parts, bone carbon, seawood meal 40 parts, polymeric aluminium ferrum silicate 0.4 part, Pioloform, polyvinyl acetal 3 parts;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 70 DEG C of water 5h together, dry at 60 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 25min, then be washed to neutrality, dry, to obtain final product;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon and seawood meal, at 400 DEG C, activates 2.4h;
Step (2), in above-mentioned Pioloform, polyvinyl acetal, drip ethanol and constantly stir, mixing speed is 180r/min, dissolves completely to Pioloform, polyvinyl acetal, obtains glue;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 60 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Embodiment 4
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 4 parts, PAMC 2.5 parts, 63 parts, bone carbon, seawood meal 37 parts, polymeric aluminium ferrum silicate 0.2 part, Pioloform, polyvinyl acetal 2.5 parts;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 73 DEG C of water 6h together, dry at 65 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 27min, then be washed to neutrality, dry, to obtain final product;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon and seawood meal, at 390 DEG C, activates 2.6h;
Step (2), in above-mentioned Pioloform, polyvinyl acetal, drip ethanol and constantly stir, mixing speed is 130r/min, dissolves completely to Pioloform, polyvinyl acetal, obtains glue;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 55 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Comparative example 1
Comparative example 1 is with the difference of embodiment 4: not containing seawood meal.
Specific as follows:
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 4 parts, PAMC 2.5 parts, 63 parts, bone carbon, polymeric aluminium ferrum silicate 0.2 part, Pioloform, polyvinyl acetal 2.5 parts;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon, at 390 DEG C, activates 2.6h;
Step (2), in above-mentioned Pioloform, polyvinyl acetal, drip ethanol and constantly stir, mixing speed is 130r/min, dissolves completely to Pioloform, polyvinyl acetal, obtains glue;
Step (3), the bone carbon that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 55 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Comparative example 2
Comparative example 2 is with the difference of embodiment 4: not containing Pioloform, polyvinyl acetal.
Specific as follows:
A kind of Removal of Arsenic in Drinking Water adsorbent, comprises the following component according to weight parts:
Nano-aluminium oxide 4 parts, PAMC 2.5 parts, 63 parts, bone carbon, seawood meal 37 parts, polymeric aluminium ferrum silicate 0.2 part;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 73 DEG C of water 6h together, dry at 65 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the NaOH being placed in 0.1mol/L soaks 27min, then be washed to neutrality, dry, to obtain final product;
The preparation method of the present embodiment Removal of Arsenic in Drinking Water adsorbent, comprises the steps:
Step (1), is placed in conventional Muffle furnace by above-mentioned bone carbon and seawood meal, at 390 DEG C, activates 2.6h;
Step (2), the bone carbon obtain step (1) and seawood meal add with the ethanol of embodiment 4 equivalent, be stirred to after mixing, continue to add above-mentioned nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 55 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
Carry out Performance Detection to embodiment of the present invention 1-4 product and comparative example 1-2 product, result is as shown in table 1.
Wherein dearsenicating method is: in arsenic-containing water, add quality is its adsorbent of 0.8%, vibrates in water bath with thermostatic control oscillator, and rotating speed is 150r/min, under 25 DEG C of conditions, and standing sedimentation after 12 hours.Described arsenic-containing water sample 1 is for containing trivalent arsenic (As (III)) 5000 μ g/L, Na
+the pending water sample of=0.01mol/L, pH=6.8; Sample 2 is for containing pentavalent arsenic ((As (V)) 5000 μ g/L, Na
+the pending water sample of=0.01mol/L, pH=6.8.
Table 1
From table 1, embodiment 1-4 product all has good arsenic removal effect, and is all better than comparative example; Embodiment 4 is the optimum embodiment of the present invention.Meanwhile, from table, together with other components of seawood meal and the present invention, there is good synergy, and Pioloform, polyvinyl acetal has great influence for the intensity of adsorbent of the present invention.
Claims (5)
1. a Removal of Arsenic in Drinking Water adsorbent, is characterized in that comprising the following component according to weight parts:
Nano-aluminium oxide 2-5 part, PAMC 1-3 part, bone carbon 60-80 part, seawood meal 30-50 part, polymeric aluminium ferrum silicate 0.1-0.5 part, Pioloform, polyvinyl acetal 2-4 part;
The preparation method of described seawood meal is: get sargassum thunbergii that mass ratio is 5:3:2, Irish moss and agar, after sterilization, be placed in 65-80 DEG C of water 3-8h together, dry at 50-70 DEG C after taking-up, then pulverize, after mixing with airslide disintegrating mill, the sodium hydroxide solution being placed in 0.1mol/L soaks 20-30min, then be washed to neutrality, dry, to obtain final product.
2. Removal of Arsenic in Drinking Water adsorbent according to claim 1, is characterized in that comprising the following component according to weight parts:
Nano-aluminium oxide 3 parts, PAMC 1.8 parts, 75 parts, bone carbon, seawood meal 40 parts, polymeric aluminium ferrum silicate 0.4 part, Pioloform, polyvinyl acetal 3 parts.
3. Removal of Arsenic in Drinking Water adsorbent according to claim 1, is characterized in that comprising the following component according to weight parts:
Nano-aluminium oxide 4 parts, PAMC 2.5 parts, 63 parts, bone carbon, seawood meal 37 parts, polymeric aluminium ferrum silicate 0.2 part, Pioloform, polyvinyl acetal 2.5 parts.
4. the preparation method of Removal of Arsenic in Drinking Water adsorbent according to claim 1, is characterized in that comprising the steps:
Step (1), activates 2-3h by bone carbon and seawood meal at 380-420 DEG C;
Step (2), drips ethanol and constantly stirs, dissolving completely, obtain glue to Pioloform, polyvinyl acetal in Pioloform, polyvinyl acetal;
Step (3), bone carbon and seawood meal that step (1) obtains is added in the glue of step (2), be stirred to after mixing, continue to add nano-aluminium oxide, PAMC and polymeric aluminium ferrum silicate at 50-70 DEG C, after continuing to be stirred to and mixing, wet method extruder grain, dries, to obtain final product.
5. the preparation method of Removal of Arsenic in Drinking Water adsorbent according to claim 4, is characterized in that the mixing speed described in step (2) is 100-200r/min.
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Cited By (6)
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|---|---|---|---|---|
| CN105195109A (en) * | 2015-10-13 | 2015-12-30 | 桂林市春晓环保科技有限公司 | Arsenic removal adsorbent for drinking water |
| CN105439220A (en) * | 2016-01-19 | 2016-03-30 | 张锐 | Sewage treatment agent and preparing method thereof |
| CN105481044A (en) * | 2016-01-19 | 2016-04-13 | 张锐 | Efficient sewage treating tablets and preparation method thereof |
| CN105561921A (en) * | 2015-12-12 | 2016-05-11 | 浙江省农业科学院 | Biochar adsorbent for efficiently adsorbing rare earth lanthanum element |
| CN112410579A (en) * | 2020-10-21 | 2021-02-26 | 中南大学 | Method for extracting rubidium and co-producing As (III) adsorption material from rubidium-containing biotite, As (III) adsorption material and application |
| CN112791711A (en) * | 2020-12-29 | 2021-05-14 | 山东国大黄金股份有限公司 | Recycled circulating water composite adsorbent for slag smelting and preparation method thereof |
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