CN105396549A - Preparation method for adsorption material used for treating dye waste water - Google Patents
Preparation method for adsorption material used for treating dye waste water Download PDFInfo
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- CN105396549A CN105396549A CN201510919577.7A CN201510919577A CN105396549A CN 105396549 A CN105396549 A CN 105396549A CN 201510919577 A CN201510919577 A CN 201510919577A CN 105396549 A CN105396549 A CN 105396549A
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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
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/12—Naturally occurring clays or bleaching earth
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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
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
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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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
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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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/42—Materials comprising a mixture of inorganic materials
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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
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4806—Sorbents characterised by the starting material used for their preparation the starting material being of inorganic character
-
- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Dispersion Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation method for an adsorption material used for treating dye waste water, belonging to the field of adsorption materials. According to the invention, since red mud contains a plurality of metal oxides and silicate, so the adsorption material can exert adsorption effect on specific pollutants; the red mud is used for activation and modification of bentonite so as to change the surface properties and interlayer structure of bentonite, so adsorption capacity, adsorption selectivity and adsorption stability are improved; and thus, the adsorption material has excellent treatment effect on dye waste water.
Description
Technical field
The invention discloses a kind of preparation method for the treatment of waste water from dyestuff sorbing material, belong to sorbing material field.
Background technology
In these mineral, calcite is that skeleton has again certain cementation, and sodium metasilicate plays cementing and filling effect.These chemical compositions of red mud, define distinctive cementing porous frame hollow structure, porosity is strong, tight ness rating is low, but it has good resistance to compression and bulk strength.Cementing and crystallization coordinator in red mud, makes red mud have firmly water stability bonding strength, can obtain good engineering property.Because red mud porosity is large, quality is light, compressibility is low, Stability Analysis of Structures, permeability are weak, be carry, the ideal raw material of impervious class building materials.The Multimetal oxide contained in red mud and baby's hydrochlorate composition, can play suction-operated to specific pollutants.The physicochemical property that current numerous scholar utilizes red mud intrinsic, adopt the means such as thermal activation or chemistry for activation to its modification, the adsorbent of preparation has Adsorption effect to multiple pollutant in water body.Because red mud has porous, it can realize absorption example to the large molecule of gas chromatography after modification.
Surperficial silica and the alumina structure of natural montmorillonite make it have extremely strong hydrophily, and the existence of the exchangeable cationic type between layer aquation, all make it can not effective organics removal; The permanent negative electrical charge existed between bentonite bed, also makes it not remove anionic pollutant; Bentonite has suction-operated, but easily desorb, be difficult to thoroughly remove from water body.So bentonite through overactivation, modification or compound, will change its surface nature and interlayer structure, adsorption capacity, adsorptive selectivity and absorption stability are improved, and just can be used to actual waste water process.Front China produces dyestuff per year more than 9 × l0
5ton, occupies first place in the world, accounts for Gross World Product 45%, according to statistics, about have the dyestuff of 1 ~ 2% and 1 ~ 10% to enter water body with waste water in DYE PRODUCTION process and dyeing course respectively.The colourity of dyestuff and COD not only produce negative effect to environment, and have potential hazard to human health and growth and development of plants and animals.In anthraquinone dye, azo dyes, kiton colors, be it is found that the kind with carcinogenesis and mutagenicity.Mostly product after dye degrades is the aromatic compounds of the carcinogenicity such as some benzidine, if azo dyes deoxidization, degradation product is carcinogenic substance---the aromatic amine that morning, oneself was known.
Summary of the invention
The technical problem that the present invention mainly solves: about have the dyestuff of 1 ~ 2% and 1 ~ 10% to enter water body with waste water in DYE PRODUCTION process and dyeing course respectively for current, the colourity of dyestuff and COD not only produce negative effect to environment, and human health and growth and development of plants and animals are had to the problem of potential hazard, provide a kind of preparation method for the treatment of waste water from dyestuff sorbing material, the present invention utilizes the Multimetal oxide and baby's hydrochlorate composition that contain in red mud, suction-operated can be played to specific pollutants, will through overactivation to bentonite with it, modification, change its surface nature and interlayer structure, adsorption capacity, adsorptive selectivity and absorption stability are improved, excellent treatment effect is had to waste water from dyestuff.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
(1) bentonite taking 150 ~ 180g allows in the beaker of 500mL, the sodium chloride solution that 200 ~ 240mL concentration is 0.6mol/L is added in cup, with glass bar mix and blend 5 ~ 8min, stratification 10min afterwards, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension;
(2) the above-mentioned suspension of 80 ~ 100mL is got in the beaker of 250mL, the magnesium chloride solution that 50 ~ 70mL concentration is 0.5mol/L is added again in beaker, 2 ~ 3h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 30 ~ 40min under the rotating speed of 6000 ~ 7000r/min, removing supernatant obtains sediment, by sediment constantly with distilled water cleaning 3 ~ 5 times, to be placed in the baking oven of 70 ~ 80 DEG C dry 4 ~ 5h, add after drying in pulverizer pulverize, sieve to obtain 300 ~ 400 object powder;
(3) the red mud sample getting 500 ~ 700g is put into distilled water and is carried out cleaning 3 ~ 5 times, remove bulk impurity, filter afterwards, obtain filter residue and put it in the baking oven of 100 ~ 110 DEG C dry, being added pulverizing in pulverizer after drying completely, sieve to obtain 100 ~ 120 order powder;
(4) getting the above-mentioned powder of 100 ~ 120g adds in beaker, and the powder added in cup in 50 ~ 60g step (1), after fully mixing, in beaker, distilled water is added by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then dry 1 ~ 2h in the baking oven of 80 ~ 90 DEG C is put it into, granulation is carried out after drying, obtain particle diameter 1 ~ 1.4mm particle, the particle obtained is moved into rapidly in tube furnace at 350 ~ 450 DEG C, carry out closed constant temperature roast 30 ~ 40min, dark brown speckles is taken out to obtain in cooling afterwards, .
Application process of the present invention is: adsorption particle the present invention obtained drops in waste water from dyestuff in the ratio of 30 ~ 50g/t, COD in first wastewater measurement is 1500 ~ 2500mg/L, under 300 ~ 600r/min rotating speed, stir 30 ~ 50min, then leave standstill, detecting COD in sewage is 60 ~ 80mg/L.
Beneficial effect of the present invention:
(1) the present invention utilizes the Multimetal oxide and baby's hydrochlorate composition that contain in red mud, can play suction-operated to specific pollutants;
(2) the present invention's red mud its through overactivation, modification, its surface nature and interlayer structure to be changed to bentonite, adsorption capacity, adsorptive selectivity and absorption stability are improved, and have excellent treatment effect to waste water from dyestuff.
Detailed description of the invention
First the bentonite taking 150 ~ 180g allows in the beaker of 500mL, the sodium chloride solution that 200 ~ 240mL concentration is 0.6mol/L is added, with glass bar mix and blend 5 ~ 8min, afterwards stratification 10min in cup, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension; Get 80 ~ 100mL suspension in the beaker of 250mL, the magnesium chloride solution that 50 ~ 70mL concentration is 0.5mol/L is added again in beaker, 2 ~ 3h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 30 ~ 40min under the rotating speed of 6000 ~ 7000r/min, removing supernatant obtains sediment, by sediment constantly with distilled water cleaning 3 ~ 5 times, to be placed in the baking oven of 70 ~ 80 DEG C dry 4 ~ 5h, add after drying in pulverizer pulverize, sieve to obtain 300 ~ 400 object powder; The red mud sample getting 500 ~ 700g is put into distilled water and is carried out cleaning 3 ~ 5 times, remove bulk impurity, filter afterwards, obtain filter residue and put it in the baking oven of 100 ~ 110 DEG C dry, being added pulverizing in pulverizer after drying completely, sieve to obtain 100 ~ 120 order powder; The powder getting 100 ~ 120g adds in beaker, and in cup, add the powder of 50 ~ 60g, after fully mixing, in beaker, distilled water is added by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then dry 1 ~ 2h in the baking oven of 80 ~ 90 DEG C is put it into, granulation is carried out after drying, obtain particle diameter 1 ~ 1.4mm particle, moved into rapidly by the particle obtained in tube furnace at 350 ~ 450 DEG C, carry out closed constant temperature roast 30 ~ 40min, dark brown speckles is taken out to obtain in cooling afterwards.
Example 1
First the bentonite taking 150g allows in the beaker of 500mL, the sodium chloride solution that 200mL concentration is 0.6mol/L is added, with glass bar mix and blend 5min, afterwards stratification 10min in cup, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension; Get 80mL suspension in the beaker of 250mL, the magnesium chloride solution that 50mL concentration is 0.5mol/L is added again in beaker, 2h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 30min under the rotating speed of 6000r/min, removing supernatant obtains sediment, and sediment is constantly cleaned 3 times with distilled water, be placed on dry 4h in the baking oven of 70 DEG C, add after drying in pulverizer pulverize, sieve to obtain 300 object powder; The red mud sample getting 500g is put into distilled water and is carried out cleaning 3 times, removes bulk impurity, filters afterwards, obtains filter residue and puts it in the baking oven of 100 DEG C dry, dry completely after added in pulverizer pulverize, sieve to obtain 100 order powder; The powder getting 100g adds in beaker, and in cup, add the powder of 50g, after fully mixing, in beaker, add distilled water by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then put it into dry 1h in the baking oven of 80 ~ 90 DEG C, after drying, carry out granulation, obtain particle diameter 1mm particle, moved into rapidly by the particle obtained in tube furnace at 350 DEG C, carry out closed constant temperature roast 30min, dark brown speckles is taken out to obtain in cooling afterwards.
Adsorption particle the present invention obtained drops in waste water from dyestuff in the ratio of 30g/t, and the COD in first wastewater measurement is 1500mg/L, stirs 30min, then leave standstill under 300r/min rotating speed, and detecting COD in sewage is 80mg/L.
Example 2
First the bentonite taking 160g allows in the beaker of 500mL, the sodium chloride solution that 220mL concentration is 0.6mol/L is added, with glass bar mix and blend 7min, afterwards stratification 10min in cup, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension; Get 90mL suspension in the beaker of 250mL, the magnesium chloride solution that 60mL concentration is 0.5mol/L is added again in beaker, 2.5h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 35min under the rotating speed of 6500r/min, removing supernatant obtains sediment, and sediment is constantly cleaned 4 times with distilled water, be placed on dry 4.5h in the baking oven of 75 DEG C, add after drying in pulverizer pulverize, sieve to obtain 350 object powder; The red mud sample getting 600g is put into distilled water and is carried out cleaning 4 times, removes bulk impurity, filters afterwards, obtains filter residue and puts it in the baking oven of 105 DEG C dry, dry completely after added in pulverizer pulverize, sieve to obtain 110 order powder; The powder getting 110g adds in beaker, and in cup, add the powder of 55g, after fully mixing, in beaker, add distilled water by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then put it into dry 1.5h in the baking oven of 85 DEG C, after drying, carry out granulation, obtain particle diameter 1.3mm particle, moved into rapidly by the particle obtained in tube furnace at 400 DEG C, carry out closed constant temperature roast 35min, dark brown speckles is taken out to obtain in cooling afterwards.
Adsorption particle the present invention obtained drops in waste water from dyestuff in the ratio of 40g/t, and the COD in first wastewater measurement is 2000mg/L, stirs 40min, then leave standstill under 450r/min rotating speed, and detecting COD in sewage is 70mg/L.
Example 3
First the bentonite taking 180g allows in the beaker of 500mL, the sodium chloride solution that 240mL concentration is 0.6mol/L is added, with glass bar mix and blend 8min, afterwards stratification 10min in cup, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension; Get 100mL suspension in the beaker of 250mL, the magnesium chloride solution that 70mL concentration is 0.5mol/L is added again in beaker, 3h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 40min under the rotating speed of 7000r/min, removing supernatant obtains sediment, and sediment is constantly cleaned 5 times with distilled water, be placed on dry 5h in the baking oven of 80 DEG C, add after drying in pulverizer pulverize, sieve to obtain 400 object powder; The red mud sample getting 700g is put into distilled water and is carried out cleaning 5 times, removes bulk impurity, filters afterwards, obtains filter residue and puts it in the baking oven of 110 DEG C dry, dry completely after added in pulverizer pulverize, sieve to obtain 120 order powder; The powder getting 120g adds in beaker, and in cup, add the powder of 60g, after fully mixing, in beaker, add distilled water by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then put it into dry 2h in the baking oven of 90 DEG C, after drying, carry out granulation, obtain particle diameter 1.4mm particle, moved into rapidly by the particle obtained in tube furnace at 450 DEG C, carry out closed constant temperature roast 40min, dark brown speckles is taken out to obtain in cooling afterwards.
Adsorption particle the present invention obtained drops in waste water from dyestuff in the ratio of 50g/t, and the COD in first wastewater measurement is 2500mg/L, stirs 50min, then leave standstill under 600r/min rotating speed, and detecting COD in sewage is 60mg/L.
Claims (1)
1., for the treatment of a preparation method for waste water from dyestuff sorbing material, it is characterized in that concrete preparation process is:
(1) bentonite taking 150 ~ 180g allows in the beaker of 500mL, the sodium chloride solution that 200 ~ 240mL concentration is 0.6mol/L is added in cup, with glass bar mix and blend 5 ~ 8min, stratification 10min afterwards, remove the sediment of supernatant liquor and bottom, obtain middle bentonite suspension;
(2) the above-mentioned suspension of 80 ~ 100mL is got in the beaker of 250mL, the magnesium chloride solution that 50 ~ 70mL concentration is 0.5mol/L is added again in beaker, 2 ~ 3h is stirred under magnetic stirring apparatus, stratification 10min after stirring, pour into afterwards in centrifugation and carry out separation 30 ~ 40min under the rotating speed of 6000 ~ 7000r/min, removing supernatant obtains sediment, by sediment constantly with distilled water cleaning 3 ~ 5 times, to be placed in the baking oven of 70 ~ 80 DEG C dry 4 ~ 5h, add after drying in pulverizer pulverize, sieve to obtain 300 ~ 400 object powder;
(3) the red mud sample getting 500 ~ 700g is put into distilled water and is carried out cleaning 3 ~ 5 times, remove bulk impurity, filter afterwards, obtain filter residue and put it in the baking oven of 100 ~ 110 DEG C dry, being added pulverizing in pulverizer after drying completely, sieve to obtain 100 ~ 120 order powder;
(4) getting the above-mentioned powder of 100 ~ 120g adds in beaker, and the powder added in cup in 50 ~ 60g step (1), after fully mixing, in beaker, distilled water is added by solid-to-liquid ratio 1:1, stir while stirring, until form the pureed with certain viscosity, then dry 1 ~ 2h in the baking oven of 80 ~ 90 DEG C is put it into, granulation is carried out after drying, obtain particle diameter 1 ~ 1.4mm particle, the particle obtained is moved into rapidly in tube furnace at 350 ~ 450 DEG C, carry out closed constant temperature roast 30 ~ 40min, dark brown speckles is taken out to obtain in cooling afterwards, .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510919577.7A CN105396549A (en) | 2015-12-12 | 2015-12-12 | Preparation method for adsorption material used for treating dye waste water |
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| CN201510919577.7A CN105396549A (en) | 2015-12-12 | 2015-12-12 | Preparation method for adsorption material used for treating dye waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345296A (en) * | 2021-12-28 | 2022-04-15 | 淮阴工学院 | Preparation method of magnetic activated carbon-red mud composite adsorbent |
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| CN102309953A (en) * | 2011-04-04 | 2012-01-11 | 上海丰信环保科技有限公司 | Method for preparing reagent for removing printing and dyeing waste water COD (Chemical Oxygen Demand) and chroma |
| CN102716723A (en) * | 2012-07-12 | 2012-10-10 | 济南大学 | Method for preparing environment-friendly starch/bentonite composite material |
| CN102849833A (en) * | 2012-09-28 | 2013-01-02 | 天津莱特化工有限公司 | High performance flocculant for wastewater treatment |
| CN102897856A (en) * | 2012-09-25 | 2013-01-30 | 薛华 | Special treatment agent for printing and dyeing wastewater |
| CN103723807A (en) * | 2013-12-04 | 2014-04-16 | 江苏双圆袋鼠服饰有限公司 | Preparation method of flocculating agent for dyeing wastewater treatment |
| CN104525206A (en) * | 2014-12-04 | 2015-04-22 | 格丰科技材料有限公司 | Porous ozone catalyst for removing COD from waste water and preparation method thereof |
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2015
- 2015-12-12 CN CN201510919577.7A patent/CN105396549A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1506315A (en) * | 2002-12-10 | 2004-06-23 | 合肥工业大学 | Prepn of laminated dihydrogen oxide and its derivative quasi-periclase |
| CN102309953A (en) * | 2011-04-04 | 2012-01-11 | 上海丰信环保科技有限公司 | Method for preparing reagent for removing printing and dyeing waste water COD (Chemical Oxygen Demand) and chroma |
| CN102716723A (en) * | 2012-07-12 | 2012-10-10 | 济南大学 | Method for preparing environment-friendly starch/bentonite composite material |
| CN102897856A (en) * | 2012-09-25 | 2013-01-30 | 薛华 | Special treatment agent for printing and dyeing wastewater |
| CN102849833A (en) * | 2012-09-28 | 2013-01-02 | 天津莱特化工有限公司 | High performance flocculant for wastewater treatment |
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| CN104525206A (en) * | 2014-12-04 | 2015-04-22 | 格丰科技材料有限公司 | Porous ozone catalyst for removing COD from waste water and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345296A (en) * | 2021-12-28 | 2022-04-15 | 淮阴工学院 | Preparation method of magnetic activated carbon-red mud composite adsorbent |
| CN114345296B (en) * | 2021-12-28 | 2023-06-30 | 淮阴工学院 | Preparation method of magnetic activated carbon-red mud composite adsorbent |
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Application publication date: 20160316 |