Preparation process of green environmentally-friendly high-adsorption-active adsorbent for printing and dyeing wastewater

A printing and dyeing wastewater, green and environmental protection technology, applied in the direction of adsorption water/sewage treatment, textile industry wastewater treatment, water/sewage treatment, etc., can solve the problem of affecting the growth of aquatic organisms and microorganisms, the adsorption activity can not meet the demand, the environment and human health threats, etc. problem, achieve excellent physical adsorption performance, simple and feasible preparation process, and solve the effect of decolorization problem

Inactive Publication Date: 2018-06-19
ANHUI WANFANG WEAVE & DYE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the remarkable characteristics of printing and dyeing wastewater is that the wastewater has a high chroma and poor water transparency, which seriously affects the growth of aquatic organisms and microorganisms, and is not conducive to self-purification of the water body.
Even some dyes will decompose under reducing conditions to produce carcinogenic aromatic amines, which pose a serious threat to the environment and human health
Therefore, decolorization is an important link in the treatment of printing and dyeing wastewater. Adsorption is a conventional process for decolorizing printing and dyeing wastewater. The most commonly used adsorbents are mainly porous substances such as activated carbon and clay, but there is a phenomenon that the adsorption process is prone to loosening, and the adsorption The technical problem that the activity cannot meet the demand needs to be solved urgently

Method used

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  • Preparation process of green environmentally-friendly high-adsorption-active adsorbent for printing and dyeing wastewater
  • Preparation process of green environmentally-friendly high-adsorption-active adsorbent for printing and dyeing wastewater
  • Preparation process of green environmentally-friendly high-adsorption-active adsorbent for printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation technology of the adsorbent for printing and dyeing wastewater with green environmental protection and high adsorption activity comprises the following steps:

[0020] S1. Stir 30g of fly ash, 12g of bentonite, and 200g of concentrated sulfuric acid at a temperature of 65°C for 2 hours, filter, wash, and dry, add 5g of β-type hemihydrate gypsum, 1g of manganese oxide, and 3g of iron oxide and mix evenly to obtain a fly ash compound thing;

[0021] S2. Mix and stir 10g carbon nanotubes and 40g spherical alumina evenly, add 100g concentration of 48wt% ethanol solution and stir for 20min at a stirring speed of 1200r / min, add 35g microcrystalline cellulose, stir at a temperature of 130°C for 20min, filter, Washing to obtain a carbon nanotube composite;

[0022] S3. Mix 10g of sodium hexametaphosphate and 60g of water evenly, add 100g of fly ash compound and 20g of carbon nanotube compound, mix evenly, put it into a mold, dry it in an oven at a tempera...

Embodiment 2

[0031] A preparation process of an environmentally friendly and highly active printing and dyeing wastewater adsorbent, comprising the following steps:

[0032] S1. Stir 50g of fly ash, 4g of bentonite, and 400g of concentrated sulfuric acid at a temperature of 45°C for 4 hours, filter, wash, and dry, add 1g of β-type hemihydrate gypsum, 4g of manganese oxide, and 1g of iron oxide and mix evenly to obtain a fly ash compound thing;

[0033] S2. Mix and stir 20g carbon nanotubes and 20g spherical alumina evenly, add 140g concentration of 40wt% ethanol solution and stir for 30min at a stirring speed of 1000r / min, add 45g microcrystalline cellulose, stir at a temperature of 120°C for 40min, filter, Washing to obtain a carbon nanotube composite;

[0034] S3. Mix 4g of sodium hexametaphosphate and 80g of water evenly, add 60g of fly ash compound and 40g of carbon nanotube compound, mix evenly, put it into the mold, dry it in an oven at a temperature of 50°C, demould, and form the m...

Embodiment 3

[0042] A kind of preparation technology of the adsorbent for printing and dyeing wastewater with green environmental protection and high adsorption activity comprises the following steps:

[0043] S1. Stir 35g of fly ash, 6g of bentonite, and 240g of concentrated sulfuric acid at a temperature of 50°C for 2.5 hours, filter, wash, and dry, add 2g of β-type hemihydrate gypsum, 1.5g of manganese oxide, and 1.2g of iron oxide and mix evenly to obtain powder coal ash compound;

[0044] S2. Mix and stir 14g carbon nanotubes and 22g spherical alumina evenly, add 110g concentration of 42wt% ethanol solution and stir for 24min at a stirring speed of 1100r / min, add 38g microcrystalline cellulose, stir at a temperature of 124°C for 25min, filter, Washing to obtain a carbon nanotube composite;

[0045] S3. Mix 6g of sodium hexametaphosphate and 63g of water evenly, add 80g of fly ash compound and 26g of carbon nanotube compound, mix evenly, put it into a mold, dry it in an oven at a temp...

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Abstract

The invention discloses a preparation process of a green environmentally-friendly high-adsorption-active adsorbent for printing and dyeing wastewater. The process comprises the following steps: mixingfly ash, bentonite and concentrated sulfuric acid, stirring, filtering, washing, drying, adding beta-type hemihydrate gypsum, manganese oxide and iron oxide, and uniformly mixing to obtain a fly ashcomposite; mixing carbon nanotubes and spherical alumina, stirring uniformly, adding an ethanol solution, stirring, adding microcrystalline cellulose, stirring, and washing to obtain a carbon nanotubecomposite; mixing sodium hexametaphosphate and water uniformly, adding the fly ash composite and the carbon nanotube composite, uniformly mixing, sending into a mold, drying in an oven, demolding, sending a molded blank body into a muffle furnace for roasting, and cooling to obtain the green environmentally-friendly high-adsorption-active adsorbent for the printing and dyeing wastewater. The preparation process is basically non-polluting, green and environmentally friendly, a product is not easy to loose in the adsorption process, the adsorption activity is high, adsorbed materials not only includes dyes in the printing and dyeing wastewater, but also includes some metal ions, the adsorption effect is better, and the problem of decolorization of the printing and dyeing wastewater is solved.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a preparation process of an environmentally friendly and highly active adsorbent for printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater refers to the wastewater discharged during the pretreatment, dyeing, printing and finishing processes of cotton, wool, chemical fiber and other textile products. It is estimated that the production of textile dyes in the world is more than 400,000 tons, and about 10-20% of the dyes are discharged as wastewater during the printing and dyeing process and enter rivers, lakes, seas and ground water. [0003] At present, the discharge of printing and dyeing wastewater ranks fifth in the national industrial wastewater discharge, accounting for 80% of the textile industry wastewater discharge. One of the notable features of printing and dyeing wastewater is that the chroma of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F103/30
CPCB01J20/06B01J20/08B01J20/12B01J20/205C02F1/283C02F2103/30
Inventor 张剑林觐奎周锡奎张国平晋吉
Owner ANHUI WANFANG WEAVE & DYE CO LTD
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