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Preparation method and application of sulfhydryl chitosan/activated carbon composite functional membrane

A composite function, activated carbon technology, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of complicated treatment process, unsatisfactory treatment effect, and increased treatment cost, and achieve mechanical strength. Good, cost-reduced, simple treatment process

Inactive Publication Date: 2014-01-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the existing technology requires specific pH conditions, and there must not be too many competitive anions, so as to have a better treatment effect, so the process includes pre-oxidation, pH adjustment before treatment and pH callback steps after treatment. It will inevitably complicate the treatment process and increase the treatment cost, and when the water source contains various competitive anions, the treatment effect is very unsatisfactory

Method used

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  • Preparation method and application of sulfhydryl chitosan/activated carbon composite functional membrane
  • Preparation method and application of sulfhydryl chitosan/activated carbon composite functional membrane
  • Preparation method and application of sulfhydryl chitosan/activated carbon composite functional membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0020] This example is the preparation of mercapto-chitosan / activated carbon composite functional membrane (CS-SH / C). The specific process is: add 10g chitosan (CS) to 240g of 0.50mol L -1 In the acetic acid aqueous solution, stirring and dissolving to obtain the chitosan acetic acid solution; take the powdered activated carbon, treat it with 10% nitric acid aqueous solution, heat and stir in a boiling water bath for 2 hours, filter, wash with deionized water until neutral, and dry at 120°C for 5 h, to obtain dry activated carbon; add 1 g of the treated dry activated carbon to the chitosan acetic acid solution, stir evenly to obtain the casting solution; take 6 mL of the casting solution and add it to a circular polypropylene mold with a diameter of 5 cm, and keep the temperature at 60 °C , when the volatilization weight loss is about 50%, soak the membrane in 1mol·L -1 NaOH aqueous solution coagulation bath, after coagulation in the coagulation bath for 24h, rinse the membra...

Embodiment 2

[0022] This example is the preparation of mercapto-chitosan / activated carbon composite functional membrane (CS-SH / C). The specific process is: add 10g chitosan (CS) to 300g of 0.50mol L -1 acetic acid aqueous solution, stirring and dissolving to obtain chitosan acetic acid solution; take powdered activated carbon, treat with 10% nitric acid, heat and stir in a boiling water bath for 3 hours, filter, wash with deionized water until neutral, and dry at 120°C for 5 h, to obtain dry activated carbon; add 2 g of the treated dry activated carbon to the chitosan acetic acid solution, and stir evenly to obtain a casting solution. Take 6mL of the casting solution and add it to a circular polypropylene mold with a diameter of 5cm, keep the temperature at 60°C, and when the volatilization loses about 50%, soak the film in 1mol·L -1NaOH aqueous solution coagulation bath, after coagulation in the coagulation bath for 24h, rinse the membrane with distilled water until neutral to obtain chi...

Embodiment 3

[0024] This example is the preparation of mercapto-chitosan / activated carbon composite functional membrane (CS-SH / C). The specific process is: add 10g chitosan (CS) to 400g of 0.50mol L -1 acetic acid aqueous solution, stir and dissolve to obtain chitosan acetic acid solution; take powdered activated carbon, treat it with 10% aqueous nitric acid solution, heat and stir in a boiling water bath for 3 hours, filter, wash with deionized water until neutral, and dry at 120°C 5 h to obtain dry activated carbon; add 2 g of the treated dry activated carbon to the chitosan acetic acid solution and stir evenly to obtain a casting solution. Take 6mL of the casting solution and add it to a circular polypropylene mold with a diameter of 5cm, keep the temperature at 60°C, and when the volatilization loses about 50%, soak the film in 1mol·L -1 NaOH aqueous solution coagulation bath, after coagulation in the coagulation bath for 24h, rinse the membrane with distilled water until neutral to o...

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Abstract

The invention relates to a preparation method and application of a sulfhydryl chitosan / activated carbon composite functional membrane, belonging to the technical fields of novel functional membrane material preparation and arsenic-polluted water treatment. The preparation method comprises the following steps: compounding chitosan and activated carbon into a membrane, adding epoxy chloropropane to carry out cross-linking to obtain a cross-linked chitosan / activated carbon composite membrane, modifying the cross-linked chitosan / activated carbon composite membrane with 2,3-dimercaptosuccinic acid, and introducing sulfhydryl group onto the chitosan framework, thereby obtaining the functional membrane. The novel functional membrane prepared by the method provided by the invention can display multiple synergic functions of chitosan, activated carbon and sulfhydryl group, is used for treating arsenic-polluted water, is applicable to wide pH range, does not need the step of preoxidation, can effectively remove As (III) and As (V), is free from the influence of coexistent competitive anions, has the advantages of favorable mechanical strength and simple treatment technique, can be used repeatedly, can greatly lower the cost, and is a new material and method having industrial application prospects.

Description

technical field [0001] A preparation method and application of a mercapto-chitosan / activated carbon composite functional membrane. The invention belongs to the technical field of preparation of new functional membrane materials and water treatment, and specifically relates to a preparation method of a mercapto-chitosan / activated carbon composite functional membrane and its use for treating arsenic Polluted water. Background technique [0002] Arsenic contamination in water is a global concern. The main cause of arsenic pollution is the use of arsenic-containing pesticides and chemicals, such as herbicides and wood preservatives. In addition, during the mining process of arsenic-containing minerals, arsenic enters the surface and underground water sources due to leaching, thereby causing arsenic pollution in water sources. Arsenic is a highly carcinogenic substance and has been identified as a Class I carcinogen by the US Centers for Disease Control and the International Ag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J5/18C08L5/08C08K9/02C08K3/04C02F1/62C02F1/28
Inventor 顾文秀毛小庆邹路易李磊王玉如王苗苗
Owner JIANGNAN UNIV
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