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Dye adsorbent for purifying printing and dying waste water, and adsorption method of dye adsorbent

A printing and dyeing wastewater and adsorbent technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, inorganic chemistry, etc., can solve problems such as printing and dyeing wastewater purification, and achieve the effects of easy operation, realization of process conditions, and easy process conditions.

Inactive Publication Date: 2017-02-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dye adsorbent and its adsorption method for purifying printing and dyeing wastewater, solve the problem of printing and dyeing wastewater purification, and develop new applications of natural cellulose nanofibers at the same time

Method used

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Effect test

Embodiment 1

[0029] A dye adsorbent for purifying printing and dyeing wastewater is composed of natural cellulose nanofiber precipitates, and the preparation method of the natural cellulose nanofiber precipitates is as follows:

[0030] (1) Treating the plant raw material through pre-oxidation treatment and biphasic aqueous solution:

[0031] First put the Ulagrass in the H 2 o 2 The concentration is 10wt%, the NaOH concentration is 5wt%, and the JFC concentration is 3wt%. The bath ratio is 1:20, the treatment temperature is 60°C, and the treatment time is 1h. Take it out and wash it, and dry it in a vacuum oven. to constant weight; then placed in the two-phase aqueous solution system obtained by mixing the polyethylene glycol-2000 (PEG-2000) solution and the inorganic salt solution according to the ratio of 1:1 in mass ratio for processing, the concentration of the PEG-2000 solution is 30wt%, the ratio of inorganic salt solution is: NaOH concentration is 2wt%, NaOH 2 SO 3 Concentratio...

Embodiment 2

[0043] A dye adsorbent for purifying printing and dyeing wastewater is composed of natural cellulose nanofiber precipitates, and the preparation method of the natural cellulose nanofiber precipitates is as follows:

[0044] (1) Treating the plant raw material through pre-oxidation treatment and biphasic aqueous solution:

[0045] First put the Ulagrass in the H 2 o 2 The concentration is 15wt%, the NaOH concentration is 2wt%, and the JFC concentration is 2wt%. The bath ratio is 1:30, the treatment temperature is 50°C, and the treatment time is 1h. Take it out, wash it, and dry it to constant weight; Then place it in the two-phase aqueous solution system obtained by mixing polyethylene glycol-2000 (PEG-2000) solution and inorganic salt solution according to the ratio of 1: 1 for processing, and the concentration of PEG-2000 solution is 10wt%. The ratio of salt solution is: NaOH concentration is 4wt%, Na 2 SO 3 Concentration is 3wt%, Na 2 CO 3 The concentration is 2wt%, th...

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Abstract

The invention provides a dye adsorbent for purifying printing and dying waste water, and an adsorption method of the dye adsorbent. The dye adsorbent is characterized by comprising natural cellulose nano-fiber precipitate, wherein a preparation method of the natural cellulose nano-fiber precipitate comprises the steps of: performing pre-oxidation treatment and double-phase aqueous solution treatment on plant raw materials; performing mechanical pulverization to obtain fiber powder; putting the fiber power into dimethyl sulfoxide and performing pretreatment; performing TEMPO oxidation treatment on the pretreated powder to obtain fiber powder suspension liquid; and performing centrifugal treatment to obtain the natural cellulose nano-fiber precipitate. The dye adsorbent provided by the invention is ecological and environmentally-friendly, and the adopted adsorption method is simple in process and suitable for industrialized production; and the adopted plant raw materials can be weed, cotton straw skin and the like, and the raw materials have wide source and low cost, so the problem of environmental pollution is solved and the plant resources are completely utilized.

Description

technical field [0001] The invention relates to the application of natural cellulose nanofibers in the purification of printing and dyeing wastewater, belonging to the technical field of textile materials. Background technique [0002] Dyestuffs are widely used in the printing and dyeing industry. During the printing and dyeing process, a large amount of printing and dyeing wastewater will be generated. The printing and dyeing wastewater has complex components, dark colors, and strong toxicity, which is extremely harmful to the environment and human body. Therefore, it has become an urgent problem to be solved in the current environmental governance to purify the printing and dyeing wastewater and realize the discharge or recycling of the wastewater up to the standard. At present, the common printing and dyeing wastewater purification methods include physical methods, chemical methods, and biological methods. The method proposed by the present invention belongs to the physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B01J20/28C02F1/28C02F101/30C02F101/36C02F101/38
CPCB01J20/24B01J20/28007B01J20/28023B01J2220/4825C02F1/286C02F2101/308C02F2101/36C02F2101/38C02F2101/40C02F2209/08
Inventor 刘丽芳刘慧杨雪赵艳娇陈霜韩阜益李莉降帅
Owner DONGHUA UNIV
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