CN106111071A - A kind of sulfhydryl modified magnetic mesoporous SiO cutting down heavy metal in waste water cadmium2preparation method - Google Patents
A kind of sulfhydryl modified magnetic mesoporous SiO cutting down heavy metal in waste water cadmium2preparation method Download PDFInfo
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- CN106111071A CN106111071A CN201610635174.4A CN201610635174A CN106111071A CN 106111071 A CN106111071 A CN 106111071A CN 201610635174 A CN201610635174 A CN 201610635174A CN 106111071 A CN106111071 A CN 106111071A
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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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
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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
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
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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
- B01J20/28009—Magnetic properties
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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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- 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
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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
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
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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
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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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
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
Present invention relates particularly to a kind of sulfhydryl modified magnetic mesoporous SiO cutting down heavy metal in waste water cadmium2Preparation method.Sulfhydryl modified magnetic mesoporous silicon dioxide can remove heavy metal cadmium ion by active adsorption.Its step method is the preparation of (1) rice hull ash solution；(2) with Fe3O4For magnetic material synthesizing magnetic mesoporous silicon oxide；(3) with 3 mercaptopropyl trimethoxysilanes as silane coupler, sulfydryl is grafted to magnetic mesoporous silica surface；(4) sulfhydryl modified magnetic mesoporous silicon dioxide is used for Adsorption heavy metal cadmium ion as adsorbent.Preparation technology of the present invention is simple, low raw-material cost, and the sulfhydryl modified magnetic mesoporous silica surface thiol concentration of gained is high, can effectively cut down the heavy metal cadmium ion in water body, and be prone to separate with waste water, and recycling rate of waterused is high.
Description
Technical field
The present invention relates to fine inorganic chemical field, be specifically related to the system of a kind of mercapto-functionalized magnetic mesoporous silicon dioxide
Standby.
Background technology
After environment is by cadmium pollution, cadmium can be enriched with in vivo, enters human body by food chain and causes chronic poisoning.
After cadmium is absorbed by the body, forms cadmium sulfoprotein in vivo, optionally accumulate in liver, kidney.Wherein, the absorbable entrance of kidney is internal
The cadmium of nearly 1/3, is cadmium poisoning " target organ ".Water is the material base that the mankind depend on for existence and development, and heavy metal cadmium is water ring
One of major pollutants in border.In view of poisoning and the present situation of heavy metal pollution in current environmental pollution of heavy metal, it is necessary to adopt
Taking corresponding solution, absorption method is a kind of important method of abatement heavy metal in waste water cadmium.
Owing to the main component of rice hull ash is carbon and silicon, and there is higher specific surface area and abundant duct, therefore
Being used as adsorbent, both achieved the recycling of refuse, environmental pollution also has certain process simultaneously.Heavy metal is given up
The administering method of water mainly has chemical precipitation method, electrochemical process, absorption method and membrane separation process etc..Absorption method is as a kind of important
The method processing heavy metal wastewater thereby, has the advantages such as simple to operate, cheap and easy to get, is widely used.But because of current adsorbent
Prevailing price is expensive, therefore exploitation is cheap, high efficiency, pollution-free, can again with adsorbent will be heavy metal ion adsorbed
The Main way of research.
The synthesis of magnetic mesoporous silicon dioxide, generally with expensive tetraethyl orthosilicate (TEOS) or Ludox as silicon
Source.Rice hull ash is the product after combusting rice hull energy supply, is mainly composed of SiO2.Active group can be introduced mesoporous by functional modification
SiO2, increase its avtive spot.By to mesoporous SiO2Surfaces externally and internally or hole wall skeleton to carry out functional modification modified, effectively
Improve its surface nature and pore structure, strengthen its absorbability.Good suction based on sulfhydryl modified magnetic mesoporous silicon dioxide
Attached, stalling characteristic, preparation can the mercapto-functionalized magnetic mesoporous earth silicon material of efficient absorption cadmium.
Summary of the invention
The problems referred to above existed for prior art, the invention provides a kind of mercapto cutting down heavy metal in waste water cadmium ion
The preparation method of base functional magnetic mesoporous silicon oxide adsorbent.Preparation technology of the present invention is simple, mild condition, cost of material
Cheap, it is suitable for industrialized production, the sulfhydryl modified magnetic mesoporous silica adsorbent sulfhydryl content of gained is high, can effectively cut down
Heavy metal cadmium ion in waste water, and be prone to separate with waste water, recycling rate of waterused is high.Technical scheme is as follows:
(1) preparation of rice hull ash solution: rice husk boils 1-3h, deionized water wash 2-3 with the hydrochloric acid of 1-2mol/L after pulverizing
Secondary, 50-80 DEG C is dried overnight, and after abundant carbonization, in Muffle furnace, 500-600 DEG C of high-temperature calcination 4-6h is solid rice hull ash.Press
Rice hull ash is that 0.8-2.4:1 weighs rice hull ash and sodium hydroxide respectively with the mass ratio of sodium hydroxide, and heating for dissolving is also settled to
In the volumetric flask of 250mL, standby as silicon source.
(2) synthesis of magnetic mesoporous silicon dioxide: accurately weigh 0.2-0.6g magnetic material Fe3O4It is 0.02-in concentration
In the cetyl trimethylammonium bromide (CTAB) of 0.04mol/L, ultrasonic 0.5-1h makes magnetic material dispersed, is placed in water-bath
Mechanical agitation be heated to 60-90 DEG C in Guo；Add 50-100mL rice hull ash solution, regulate pH to 3-12 with the HCl of 1mol/L；
Being centrifuged after constant temperature ageing 12-24h and abandon supernatant, deionized water wash 3 times, 50-80 DEG C is dried overnight, 500-600 DEG C of calcining 2-
6h, obtains magnetic mesoporous silicon dioxide.
(3) synthesis of sulfhydryl modified magnetic mesoporous silicon dioxide: accurately weigh the magnetic mesoporous silicon dioxide of 0.5g and be dissolved in
In the ultra-pure water of 0.5-1.0mL, after adding 30-40mL absolute methanol ultrasonic disperse 30-60min, add the glycerol of 30-40mL again
Ultrasonic 10-30min, is transferred to solution in 250mL there-necked flask.Measure the 3-mercaptopropyl trimethoxysilane of 0.3-1.0mL
Mix with the absolute methanol of 20-30mL, and pour in there-necked flask, add the catalyst ammonia water of 250-1000 μ L, in 60-90 DEG C
Lower stirring 6-12h.After having stirred, the debris in flask being poured out methanol to wash 2-4 time, be washed to neutrality, 50-80 DEG C is dried
Overnight, sulfhydryl modified magnetic mesoporous silicon dioxide is obtained.
(4) absorption of cadmium wastewater: accurately weigh the sulfhydryl modified magnetic mesoporous silicon dioxide of 20-100mg in 50-
200mL concentration is in the cadmium standard solution of 0.5-10mg/kg, adjusts in the shaking table of pH to 4-8,100-200rmp, permanent at 20-40 DEG C
Temperature vibration 2-10h, commercially available Magnet separates, and measures the concentration of cadmium in solution.
Use having the beneficial effects that of above-mentioned process program: the hydroxyl that the present invention is formed after being hydrolyzed by silane coupler with
The condensation reaction of the silicone hydroxyl on magnetic Nano silicon dioxide prepares sulfhydryl modified magnetic mesoporous silicon dioxide, preparation technology letter
Single, preparation condition is gentle；With rice hull ash for silicon source, low raw-material cost, improve the utilization rate of rice hull ash simultaneously；This sulfydryl changes
Property magnetic mesoporous silica adsorbent easy to use, can be achieved with solid after the cadmium in absorption waste water under the effect of externally-applied magnetic field
Liquid separates, and steeps through peracid after separation, and adsorbent can reuse again, cost-effective；The sulfhydryl modified magnetic mesoporous dioxy of gained
SiClx surface sulfhydryl content is high (0.1-0.3mmol/g), can effectively remove the heavy metal cadmium in waste water, and removal efficiency height can reach
90-97%, advances SiO2Material application in terms of processing heavy metal.
Detailed description of the invention
By the following examples the present invention is specifically described.
Case study on implementation 1
(1) preparation of rice hull ash solution: rice husk boils 3h with the hydrochloric acid of 2mol/L after pulverizing, deionized water wash 3 times, 80 DEG C
Being dried overnight, after abundant carbonization, in Muffle furnace, 550 DEG C of high-temperature calcination 4h obtain solid rice hull ash.By rice hull ash and sodium hydroxide
Mass ratio be that 0.8:1 weighs rice hull ash 6.4g and sodium hydroxide 8.0g respectively, heated and stirred 2h, sucking filtration, filtrate is settled to
In the volumetric flask of 250mL.
(2) synthesis of magnetic mesoporous silicon dioxide: weigh 1.5g CTAB and be dissolved in 100mL deionized water, adds and accurately claims
The 0.2g Fe taken3O4, ultrasonic 0.5h makes Fe3O4Dispersed, it is placed in water-bath mechanical agitation and is heated to 70 DEG C；Add
100mL rice hull ash solution, regulates pH to 3 with the HCl of 1mol/L；It is centrifuged after constant temperature ageing 12h and abandons supernatant, deionized water wash
3 times, 80 DEG C are dried overnight, 550 DEG C of calcining 2h, obtain magnetic mesoporous silicon dioxide.
(3) synthesis of sulfhydryl modified magnetic mesoporous silicon dioxide: accurately weigh the magnetic mesoporous silicon dioxide of 0.5g and be dissolved in
In the ultra-pure water of 0.5mL, after adding 30mL absolute methanol ultrasonic disperse 30min, add the most ultrasonic 10min of glycerol of 30mL,
Solution is transferred in 250mL there-necked flask.The absolute methanol of the 3-mercaptopropyl trimethoxysilane and 20mL that measure 0.5mL mixes
Close, and pour in there-necked flask, add the ammonia of 250 μ L, at 70 DEG C, stir 6h.By the debris in flask after having stirred
Pouring out methanol to wash 2 times, be washed to neutrality, 80 DEG C are dried overnight, and obtain sulfhydryl modified magnetic mesoporous silicon dioxide.
(4) absorption of cadmium wastewater: the sulfhydryl modified magnetic mesoporous silicon dioxide accurately weighing 50mg in 200mL concentration is
In the cadmium standard solution of 0.55mg/kg, adjust pH to 6, in the shaking table of 150rmp at 20 DEG C constant temperature oscillation 2h, commercially available Magnet divides
From, measure the concentration of cadmium in solution.After testing, data such as table 1.
Indices after table 1. adsorbent thiol concentration and addition water body thereof
Case study on implementation 2
(1) preparation of rice hull ash solution: rice husk boils 2h, deionized water wash with the hydrochloric acid of 2mol/L after pulverizing
3 times, 50 DEG C are dried overnight, and after abundant carbonization, in Muffle furnace, 550 DEG C of high-temperature calcination 6h obtain solid rice hull ash.Press
Rice hull ash is that 0.8:1 weighs rice hull ash 6.4g and sodium hydroxide 8.0g, heated and stirred 4h respectively with the mass ratio of sodium hydroxide, takes out
Filter, filtrate is settled in the volumetric flask of 250mL.
(2) synthesis of magnetic mesoporous silicon dioxide: weigh 0.75g CTAB and be dissolved in 100mL deionized water, adds accurately
The 0.2g Fe weighed3O4, ultrasonic 0.5h makes Fe3O4Dispersed, it is placed in water-bath mechanical agitation and is heated to 80 DEG C；Add
50mL rice hull ash solution, regulates pH to 11 with the HCl of 1mol/L；It is centrifuged after constant temperature ageing 24h and abandons supernatant, deionized water wash
3 times, 50 DEG C are dried overnight, 550 DEG C of calcining 4h, obtain magnetic mesoporous silicon dioxide.
(3) synthesis of sulfhydryl modified magnetic mesoporous silicon dioxide: accurately weigh the magnetic mesoporous silicon dioxide of 0.5g and be dissolved in
In the ultra-pure water of 0.625mL, after adding 37.5mL absolute methanol ultrasonic disperse 30min, the glycerol adding 37.5mL is the most ultrasonic
10min, is transferred to solution in 250mL there-necked flask.Measure the 3-mercaptopropyl trimethoxysilane of 0.3mL and the anhydrous of 20mL
Methanol mixed, and pour in there-necked flask, add the ammonia of 500 μ L, at 80 DEG C, stir 8h.By in flask after having stirred
Debris is poured out methanol and is washed 2 times, is washed to neutrality, and 50 DEG C are dried overnight, and obtains sulfhydryl modified magnetic mesoporous silicon dioxide.
(4) absorption of cadmium wastewater: accurately weigh the sulfhydryl modified magnetic mesoporous silicon dioxide of 100mg in 200mL concentration
For in the cadmium standard solution of 1.60mg/kg, adjust pH to 6, in the shaking table of 150rmp at 25 DEG C constant temperature oscillation 5h, commercially available Magnet divides
From, measure the concentration of cadmium in solution.After testing, data such as table 2.
Indices after table 2. adsorbent thiol concentration and addition water body thereof
Case study on implementation 3
(1) preparation of rice hull ash solution: rice husk boils 2h with the hydrochloric acid of 2mol/L after pulverizing, deionized water wash 3 times, 50 DEG C
Being dried overnight, after abundant carbonization, in Muffle furnace, 550 DEG C of high-temperature calcination 6h obtain solid rice hull ash.By rice hull ash and sodium hydroxide
Mass ratio be that 1:1 weighs rice hull ash 8.0g and sodium hydroxide 8.0g respectively, heated and stirred 5h, sucking filtration, filtrate is settled to 250mL
Volumetric flask in.
(2) synthesis of magnetic mesoporous silicon dioxide: weigh 0.75g CTAB and be dissolved in 100mL deionized water, adds accurately
The 0.2g Fe weighed3O4, ultrasonic 1h makes Fe3O4Dispersed, it is placed in water-bath mechanical agitation and is heated to 80 DEG C；Add
50mL rice hull ash solution, regulates pH to 10 with the HCl of 1mol/L；It is centrifuged after constant temperature ageing 24h and abandons supernatant, deionized water wash
3 times, 50 DEG C are dried overnight, 550 DEG C of calcining 4h, obtain magnetic mesoporous silicon dioxide.
(3) synthesis of sulfhydryl modified magnetic mesoporous silicon dioxide: accurately weigh the magnetic mesoporous silicon dioxide of 0.5g and be dissolved in
In the ultra-pure water of 1.0mL, after adding 40mL absolute methanol ultrasonic disperse 30min, add the most ultrasonic 10min of glycerol of 40mL,
Solution is transferred in 250mL there-necked flask.The absolute methanol of the 3-mercaptopropyl trimethoxysilane and 20mL that measure 1.0mL mixes
Close, and pour in there-necked flask, add the ammonia of 750 μ L, at 80 DEG C, stir 10h.By the residual in flask after having stirred
Liquid is poured out methanol and is washed 2 times, is washed to neutrality, and 50 DEG C are dried overnight, and obtains sulfhydryl modified magnetic mesoporous silicon dioxide.
(4) absorption of cadmium wastewater: accurately weigh the sulfhydryl modified magnetic mesoporous silicon dioxide of 100mg in 200mL concentration
For in the cadmium standard solution of 5mg/kg, adjust pH to 5, in the shaking table of 150rmp at 30 DEG C constant temperature oscillation 5h, commercially available Magnet separates,
Measure the concentration of cadmium in solution.After testing, data such as table 3.
Indices after table 3. adsorbent thiol concentration and addition water body thereof
Claims (6)
1. the sulfhydryl modified magnetic mesoporous SiO cutting down heavy metal in waste water cadmium2Preparation method,
It is characterized in that, the processing step through the most concrete:
(1) preparation of rice hull ash solution: rice husk boils 1-3h with the hydrochloric acid of 1-2mol/L after pulverizing, deionized water wash 2-3 time,
50-80 DEG C is dried overnight, and after abundant carbonization, in Muffle furnace, 500-600 DEG C of high-temperature calcination 4-6h is solid rice hull ash；By rice
Shell ash is that 0.8-2.4:1 weighs rice hull ash and sodium hydroxide respectively with the mass ratio of sodium hydroxide, and heating for dissolving is also settled to
In the volumetric flask of 250mL, standby as silicon source；
(2) synthesis of magnetic mesoporous silicon dioxide: accurately weigh 0.2-0.6g magnetic material in concentration be 0.02-0.04mol/L
Surfactant in, ultrasonic 0.5-1h makes magnetic material dispersed, is placed in water-bath mechanical agitation and is heated to 60-90
℃；Add 50-100mL rice hull ash solution, regulate pH to 3-12 with the HCl of 1mol/L；It is centrifuged after constant temperature ageing 12-24h and abandons
Clear liquid, deionized water wash 3 times, 50-80 DEG C is dried overnight, 500-600 DEG C of calcining 2-6h, obtains magnetic mesoporous silicon dioxide；
(3) synthesis of sulfhydryl modified magnetic mesoporous silicon dioxide: accurately weigh the magnetic mesoporous silicon dioxide of 0.5g and be dissolved in 0.5-
In the ultra-pure water of 1.0mL, after adding 30-40mL absolute methanol ultrasonic disperse 30-60min, the glycerol adding 30-40mL is the most ultrasonic
10-30min, is transferred to solution in 250mL there-necked flask；Measure the silane coupler of 0.3-1.0mL and the anhydrous of 20-30mL
Methanol mixed, and pour in there-necked flask, add the catalyst of 250-1000 μ L, at 60-90 DEG C, stir 6-12h；Stir
After one-tenth, the debris in flask being poured out methanol to wash 2-4 time, be washed to neutrality, 50-80 DEG C is dried overnight, and obtains sulfhydryl modified magnetic
Property mesoporous silicon oxide；
(4) absorption of cadmium wastewater: the sulfhydryl modified magnetic mesoporous silicon dioxide accurately weighing 20-100mg is dense in 50-200mL
In the cadmium standard solution that degree is 0.5-10mg/kg, constant temperature oscillation 2-at 20-40 DEG C in the shaking table of tune pH to 4-8,100-200rmp
10h, commercially available Magnet separates, the concentration of cadmium in Solution by Atomic Absorption Spectrophotometry.
Preparation method the most according to claim 1, it is characterised in that the magnetic material described in step (2) is Fe3O4, Fe2O3。
Preparation method the most according to claim 1, it is characterised in that the surfactant described in step (2) is cetyl
Trimethylammonium bromide (CTAB) aqueous solution.
Preparation method the most according to claim 1, it is characterised in that the silane coupler described in step (3) is 3-mercapto propyl group
Trimethoxy silane, 3-mercaptopropyltriethoxysilane.
Preparation method the most according to claim 1, it is characterised in that the catalyst described in step (3) is ammonia.
Preparation method the most according to claim 1, it is characterised in that the configuration cadmium standard solution described in step (4) is used
Solute be CdCl2·2.5H2O, Cd (NO3)2·2.5H2O。
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| CN107697997A (en) * | 2017-10-24 | 2018-02-16 | 江汉大学 | A kind of hydrophobic metals trapping agent and preparation method thereof |
| CN109529781A (en) * | 2018-12-27 | 2019-03-29 | 沈阳建筑大学 | A kind of sewage removal of mercury quartz sand modified load sulfydryl material and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824112A (en) * | 2017-03-06 | 2017-06-13 | 济南大学 | A kind of preparation of 2 mercaptopyrimidine modified magnetic cotton stalk skins adsorbent |
| CN107697997A (en) * | 2017-10-24 | 2018-02-16 | 江汉大学 | A kind of hydrophobic metals trapping agent and preparation method thereof |
| CN107697997B (en) * | 2017-10-24 | 2021-03-23 | 江汉大学 | Hydrophobic metal trapping agent and preparation method thereof |
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Inventor after: Chen Zhengxing Inventor after: Zhou Lifeng Inventor after: Wang Ren Inventor after: Wang Li Inventor after: Li Juan Inventor after: Luo Xiaohu Inventor before: Chen Zhengxing Inventor before: Wang Ren Inventor before: Wang Li Inventor before: Li Juan Inventor before: Luo Xiaohu |
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Application publication date: 20161116 |