Method for treating dye wastewater by utilizing modified straws

A technology for modifying straw and dye wastewater, applied in water/sewage treatment, chemical instruments and methods, textile industry wastewater treatment, etc. Strong ability, good cohesion effect, easy to use effect

Inactive Publication Date: 2015-01-28
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, dyes play an essential role, but due to the use of dyes in the printing and dyeing process, the printing and dyeing wastewater has the characteristics of complex components, large chroma, high concentration and many biodegradable substances

Method used

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  • Method for treating dye wastewater by utilizing modified straws
  • Method for treating dye wastewater by utilizing modified straws
  • Method for treating dye wastewater by utilizing modified straws

Examples

Experimental program
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Embodiment 1

[0025] 1. Preparation of modified straw

[0026] (1) Rice straw pretreatment

[0027] Weigh 10g of rice straw passed through a 20-mesh sieve and 20g of sodium hydroxide into a 1000ml beaker, add 200ml of distilled water and 100ml of 3% hydrogen peroxide at the same time, place the beaker on a magnetic stirrer, control the stirring rate to 300r / min, and the temperature at Stir at 5-10°C for 5-6h, then filter, rinse the product with distilled water until it is nearly neutral, and dry it at 60°C to constant weight.

[0028] (2) Rice straw modification

[0029] ①Weigh 2g of the straw treated by (1), weigh 0.6g, 1g, 2g, 4g, and 6g of the modifier tetradecyltrimethylammonium chloride respectively and place them in a 1000ml beaker, add 200ml distilled water and 100ml concentration 3% hydrogen peroxide, put the beaker on a magnetic stirrer, filter at pH=7, temperature=60°C, stirring rate=500r / min, stirring time 4h, rinse the product with distilled water until neutral, Dry at 60°C t...

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Abstract

The invention belongs to the technical field of water treatment in water pollution prevention and control, and relates to the treatment of dye wastewater, in particular to a method for treating dye wastewater by utilizing modified straws. The method comprises the following steps of performing straw modification by virtue of a two-step method, namely pre-treating rice straws by virtue of sodium hydroxide, and performing modification reaction on the pre-treated rice straws and tetradecyl trimethyl ammonium chloride; removing orange yellow II, methylene blue and eriochrome black T dyes from a water body to finally realize the treatment of the dye wastewater by virtue of the modified straws. The modified rice straws and tetradecyl trimethyl ammonium chloride are subjected to mixed reaction according to a mass ratio of 1:1 to 1:1.5; the content of sodium hydroxide is 10 to 30 mass percent. According to the technical scheme, the good coagulation effects, high decolorization capability and convenience in use are achieved, and the cost is lowered; agricultural straws can be recycled, and meanwhile, the dye wastewater can be decolored.

Description

technical field [0001] The invention belongs to the technical field of water treatment in water pollution prevention and control, and in particular relates to the treatment of dye wastewater, in particular to a method for treating dye wastewater by using modified straw. Background technique [0002] my country is a large agricultural production country, and a large amount of agricultural straw is produced every year. According to statistics, there are more than 600 million tons of crop straw produced in my country every year. Crop stalks not only contain various nutrients needed for plant growth, but also rich in organic matter. It can be used not only as a feed resource, but also as a source of soil organic matter. At present, the utilization rate of straw in our country is only 33%, of which only about 2.6% have been processed by technology. [0003] With the continuous improvement of rural living standards, energy sources such as coal and natural gas have gradually repl...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/58
CPCC02F1/56C02F2103/30
Inventor 伍钧杨刚赵旭赵丹黄常红张小洪李黎彭宏蔺丽丽肖鸿
Owner SICHUAN AGRI UNIV
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