Dye adsorbent and preparation method and application thereof

A technology of adsorbents and dyes, applied in chemical instruments and methods, adsorption of water/sewage treatment, water pollutants, etc., can solve the problems of low adsorption efficiency, achieve the effect of improved removal rate, simple treatment method, and good benefits

Pending Publication Date: 2021-06-11
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only using untreated Pichia pastoris to directly treat dye wastewater, its adsorption efficiency is very low

Method used

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  • Dye adsorbent and preparation method and application thereof
  • Dye adsorbent and preparation method and application thereof
  • Dye adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a dye adsorbent specifically includes the steps of: drying Pichia slag at 60° C. for 12 hours to constant weight; mixing dry Pichia slag with 10-50 mmol / L CTAB solution in a mass-volume ratio of 1: After mixing evenly at a ratio of 10, the modified Pichia pastoris was obtained after being treated in a warm bath at 30°C for 24 hours; the modified Pichia pastoris was recovered by centrifugation, washed twice with distilled water, and the surfactant CTAB was washed away, and dried at 60°C for 12 hours to Constant weight and pulverization to prepare dye biosorbent for treating dye wastewater.

[0029] Take 1g of dye biosorbent and add it into 1L of reactive black dye wastewater with a concentration of 150mg / L while stirring. At normal temperature, pH 2-10 is adsorbed for 3-16h, and the maximum adsorption rate can reach 98.4%. The solid-liquid separation is carried out by centrifugation or precipitation separation, and the waste yeast residue is separ...

Embodiment 2

[0031] Take 1g of dye biosorbent and add it to 1L of reactive red dye wastewater with a concentration of 250mg / L while stirring. At normal temperature, pH2-10 carries out adsorption reaction for 1-16h, and the maximum adsorption rate can reach 97.8%. The solid-liquid separation is carried out by centrifugation or precipitation separation, and the waste yeast residue is separated to obtain treated effluent.

[0032] The preparation method of the dye biosorbent is the same as in Example 1.

Embodiment 3

[0034] Take 1g of dye biosorbent and add it into 1L of wastewater with a concentration of 50mg / L active orange dye while stirring. At room temperature, pH2-8 carries out adsorption reaction for 1-16h, and the maximum adsorption rate can reach 99.4%. The solid-liquid separation is carried out by centrifugation or precipitation separation, and the waste yeast residue is separated to obtain treated effluent.

[0035] The preparation method of the dye biosorbent is the same as in Example 1.

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Abstract

The invention belongs to the technical field of dye wastewater treatment, and particularly discloses a dye adsorbent and a preparation method and application thereof. The preparation method of the dye adsorbent comprises the following steps: uniformly mixing pichia pastoris residues dried to constant weight with a CTAB solution according to a certain proportion, carrying out chemical modification treatment to obtain modified pichia pastoris, and using the modified pichia pastoris as an adsorbent for treating dye wastewater; and adding the modified pichia pastoris into dye wastewater, and stirring for dye adsorption. The modified pichia pastoris has efficient adsorption and decolorization effects on dye wastewater, and the dye decolorization rate can reach 95% or above. According to the present invention, the industrial waste yeast residue is modified with the surfactant CTAB so that the excellent dye adsorption performance is provided, the dye adsorbent is used for adsorption decolorization of dye wastewater in printing and dyeing industry, the method is simple, the cost is low, the benefit is good, the purpose of treating the waste with the waste is achieved, the yeast is non-toxic and harmless to the environment, the degradation is easy, the secondary pollution is avoided, and wide application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of dye wastewater treatment, and in particular relates to a dye adsorbent and its preparation method and application. Background technique [0002] With the mass production of dyes every year and their extensive use in industries such as papermaking, textiles, leather, food, and cosmetics, a large amount of dye wastewater is produced. Dye wastewater has the characteristics of high chroma, high chemical oxygen demand (COD), high toxicity and difficult treatment. Most of the dyes are highly toxic. At present, there are many evidences that some commonly used dyes and their degradation products have the "three causes" of mutagenesis, sakiness, and carcinogenicity to aquatic organisms, which also bring harm to human survival and health. Big threat. The removal of dyes from aqueous solutions has received more and more attention, and the country has also established many strict standards to control the concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/30C02F103/30
CPCC02F1/286B01J20/24C02F2101/308C02F2103/30
Inventor 刘慧平邓毛程李静林淑云徐锦
Owner GUANGDONG IND TECHN COLLEGE
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