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Process for preparing Fenton catalyst by using KOH modified rice husks, and applications of Fenton catalyst in degradation of printing and dyeing wastewater

A catalyst and rice husk technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, oxidized water/sewage treatment, etc., can solve problems such as complex processes, and achieve low preparation costs and selectivity Strong, easy-to-operate effect

Inactive Publication Date: 2020-01-24
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nano-Ag has very strong bactericidal effect and catalytic performance, can be widely used in aspects such as catalyst, medicine and industry; Nano-α-Fe 2 o 3 It has a large specific surface area, exhibits superior gas sensing performance and catalytic performance, and is widely used in the fields of catalysts, magnetic materials, pigments, etc. At present, the synthesis of nano-Fe 2 o 3 Most of the methods are two or more steps, and need to go through high temperature treatment, the process is more complicated

Method used

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  • Process for preparing Fenton catalyst by using KOH modified rice husks, and applications of Fenton catalyst in degradation of printing and dyeing wastewater
  • Process for preparing Fenton catalyst by using KOH modified rice husks, and applications of Fenton catalyst in degradation of printing and dyeing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Preparation of Fenton catalyst with KOH modified rice husk as carrier

[0024] S1: Preparation of KOH modified rice husk: Add 10 g of rice husk to 150 ml of 80 g / L KOH solution, stir in a water bath at 50 °C for 40 min, wash with deionized water until neutral, dry at 80 °C to constant weight, grind and pulverize, Pass through a 50-mesh sieve to obtain modified rice husk powder;

[0025] S2: Preparation of hydrochloric acid-doped polyaniline: at 0°C, add 6.98 g of aniline to 150 mL of 0.1 mol / L HCl solution, stir evenly, and then add 75 mL of 1 mol / L (NH 4 ) 2 S 2 O 8 The solution, when the color of the solution gradually changed from colorless to blue-black, continued to stir for 3h, left standing overnight, after suction filtration, washed three times with 0.01mol / L hydrochloric acid solution and acetone respectively, and then washed with deionized water until the pH was 6 , the filter cake was dried by blasting at 65°C and washed to constant weight, and ...

Embodiment 2

[0027] Example 2 Preparation of Fenton catalyst with KOH modified rice husk as carrier

[0028]S1: Preparation of KOH modified rice husk: add 10 g of rice husk to 150 ml of 80 g / L KOH solution, stir in a water bath at 70 °C for 40 min, wash with deionized water until neutral, dry at 80 °C to constant weight, grind and pulverize, Pass through a 50-mesh sieve to obtain modified rice husk powder;

[0029] S2: Preparation of hydrochloric acid-doped polyaniline: at 0°C, add 6.98 g of aniline to 150 mL of 0.1 mol / L HCl solution, stir evenly, and then add 75 mL of 1 mol / L (NH 4 ) 2 S 2 O 8 The solution, when the color of the solution gradually changed from colorless to blue-black, continued to stir for 3h, left standing overnight, after suction filtration, washed three times with 0.01mol / L hydrochloric acid solution and acetone respectively, and then washed with deionized water until the pH was 6 , the filter cake was dried by blasting at 65°C and washed to constant weight, and g...

Embodiment 3

[0031] Example 3 Preparation of Fenton catalyst with KOH modified rice husk as carrier

[0032] S1: Preparation of KOH-modified rice husks: Add 10 g of rice husks to 150 ml of 80 g / L KOH solution, stir in a water bath at 80 °C for 40 min, wash with deionized water until neutral, dry at 80 °C to constant weight, grind and pulverize, Pass through a 50-mesh sieve to obtain modified rice husk powder;

[0033] S2: Preparation of hydrochloric acid-doped polyaniline: at 0°C, add 6.98 g of aniline to 150 mL of 0.1 mol / L HCl solution, stir evenly, and then add 75 mL of 1 mol / L (NH 4 ) 2 S 2 O 8 The solution, when the color of the solution gradually changed from colorless to blue-black, continued to stir for 3h, left standing overnight, after suction filtration, washed three times with 0.01mol / L hydrochloric acid solution and acetone respectively, and then washed with deionized water until the pH was 6 , the filter cake was dried by blasting at 65°C and washed to constant weight, an...

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Abstract

The invention discloses a process for preparing a Fenton catalyst by using KOH modified rice husks, and applications of the Fenton catalyst in degradation of printing and dyeing wastewater. The process comprises: S1, preparing KOH modified rice husks: adding rice husks into an 80-100 g / L KOH solution, carrying out water bath stirring treatment at 50-80 DEG C for 40 min, washing, drying, and crushing; S2, preparing hydrochloric acid doped polyaniline; and S3, preparing a KOH modified rice husk loaded Fenton catalyst: sequentially adding the hydrochloric acid doped polyaniline, FeSO4.7H2O, FeCl3.6H2O and the KOH modified rice husks into a DMF solution containing 0.01 mol / L AgNO3, carrying out a stirring reaction for 24 h at 40 DEGC under the action of ultrasonic waves, adding a 0.25 mol / L KOH solution in a dropwise manner for 2 h, continuously stirring for 30 min, ending, filtering, washing, drying, and roasting for 3 h at 150-200 DEG C in an N2 atmosphere. According to the invention, the nanometer Ag-Fe2O3 / KOH modified rice husk composite Fenton catalyst is synthesized by firstly using the KOH modified rice husk as the carrier through the in-situ one-step method at a low temperature, so that the operation is simple, the preparation cost is low, the catalytic activity is high, the selectivity is strong, and the catalyst can be recycled.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and also belongs to the technical field of organic wastewater treatment, and specifically relates to a process for preparing a Fenton catalyst by using KOH modified rice husks and its application in degrading printing and dyeing wastewater. Background technique [0002] Due to the rapid progress of the textile industry, more and more wastewater is produced. Printing and dyeing wastewater has the characteristics of large discharge, complex composition, high chroma, and high difficulty in treatment. China is a big exporter of dyestuffs, and its annual output of dyestuffs is as high as 1 million tons. At the same time, the high output also causes the discharge of printing and dyeing wastewater to be in the forefront of various industrial wastewaters in China. The types of organic dyes in printing and dyeing wastewater are various, and most of them are toxic, pollute the water source, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/10B01J35/02C02F1/72C02F101/30
CPCB01J31/28C02F1/722C02F1/725C02F2101/308B01J35/00B01J35/30B01J35/633B01J35/647B01J35/615
Inventor 赵建军刘沐鑫吴景梅张现峰史宜望姜绯周密邹振南
Owner BENGBU COLLEGE
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