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A method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater

An organic wastewater, adsorption and catalysis technology, applied in the directions of oxidized water/sewage treatment, adsorbed water/sewage treatment, chemical instruments and methods, etc., can solve the problems of high energy consumption, limited effect, high cost, and achieve simple phase composition, Time saving and low cost effect

Active Publication Date: 2022-05-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of high cost, high energy consumption and limited effect of existing methods for degrading Congo red, and provide a method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater

Method used

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  • A method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater
  • A method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater
  • A method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater

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specific Embodiment approach 1

[0035] Specific embodiment one: a kind of rapid adsorption catalytic oxidation of Congo red of the present embodiment is carried out according to the following steps:

[0036] 1. Preparation of zero-valent iron biochar: crush rice straw and pass it through a 100-mesh sieve, then wash it twice with ultrapure water, then dry it in an oven at 60°C to constant weight, then take 5g of crushed rice straw and add it to 100mL In a mixed aqueous solution of polyethylene glycol 400 and ferric chloride hexahydrate, react in an oil bath at 100°C for 30 minutes under magnetic stirring. Raise the temperature to 700°C at a heating rate of / min, and carbonize at this temperature for 2 hours, and cool naturally to room temperature to obtain zero-valent iron biochar; the mixed aqueous solution of polyethylene glycol 400 and ferric chloride hexahydrate in the polyethylene The volume ratio of glycol 400 to water is 1:1, and the mass concentration of ferric chloride hexahydrate in the mixed aqueou...

specific Embodiment approach 2

[0038] Specific embodiment two: a kind of rapid adsorption catalytic oxidation of Congo red of the present embodiment is carried out according to the following steps:

[0039] 1. Preparation of zero-valent iron biochar: crush rice straw and pass it through a 100-mesh sieve, then wash it twice with ultrapure water, then dry it in an oven at 60°C to constant weight, then take 5g of crushed rice straw and add it to 100mL In a mixed aqueous solution of polyethylene glycol 400 and ferric chloride hexahydrate, react in an oil bath at 100°C for 30 minutes under magnetic stirring. Raise the temperature to 700°C at a heating rate of / min, and carbonize at this temperature for 2 hours, and cool naturally to room temperature to obtain zero-valent iron biochar; the mixed aqueous solution of polyethylene glycol 400 and ferric chloride hexahydrate in the polyethylene The volume ratio of glycol 400 to water is 1:1, and the mass concentration of ferric chloride hexahydrate in the mixed aqueou...

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Abstract

A method for rapid adsorption and catalytic oxidation of Congo red to treat organic wastewater. The invention belongs to the field of dye organic wastewater treatment. The purpose of the invention is to solve the technical problems of high cost, high energy consumption and limited effect in the existing method for degrading Congo red. Method: 1. Add rice straw into a mixed aqueous solution of polyethylene glycol and ferric chloride hexahydrate, react in an oil bath under magnetic stirring, and carbonize at high temperature after the reaction is completed to obtain zero-valent iron biochar; The mixture of biochar or zero-valent iron biochar and potassium persulfate is added to the organic wastewater containing Congo red, and the removal of Congo red in the organic wastewater is completed by adsorption or catalytic oxidation. Using zero-valent iron biochar to adsorb Congo red dye, the removal efficiency has reached 70.5% within 5 minutes, and the removal time is short and the efficiency is high. Using zero-valent iron biochar and potassium persulfate to catalyze the oxidation of Congo red dye, the removal effect reached 90% in 60 minutes and 93.3% in 150 minutes, realizing the efficient removal of Congo red-containing organic wastewater.

Description

technical field [0001] The invention belongs to the field of dye organic wastewater treatment, and in particular relates to a method for treating organic wastewater by rapid adsorption and catalytic oxidation of Congo red. Background technique [0002] With the development of science and technology and industrialization, my country's water environment is polluted by different types of wastewater. As one of them, organic dyes are widely sourced from textile, food, cosmetics and other industries. Their large discharge not only endangers the growth of aquatic organisms, but also poses a hazard to human health. These organic dyes are toxic, carcinogenic and mutagenic. However, its structure is complex and difficult to remove. Congo red dye is an anionic dye with a disazo group, and its metabolite benzidine is a carcinogen. Therefore, it is necessary to study the removal of Congo red dye. [0003] At present, the known dye removal methods include adsorption method, photolysis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01J23/745C02F1/28C02F1/72C02F101/30C02F101/38
CPCC02F1/283C02F1/281C02F1/725B01J23/745B01J20/20B01J20/02C02F2101/308C02F2101/38B01J2220/4806B01J2220/4812B01J2220/4825
Inventor 刘冰峰卓胜男任宏宇谢国俊邢德峰
Owner HARBIN INST OF TECH
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