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Method of catalyzing hydrogen peroxide with molybdate-carried ion exchange resin to degrade trichlorophenol

A technology of ion exchange resin and hydrogen peroxide, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problems of degradation efficiency reduction

Inactive Publication Date: 2010-01-06
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a shortcoming in the Fenton reaction or Fenton-like reaction. It is strictly required that the acidity of the reaction system is between 2.8 and 4, otherwise the degradation efficiency will be greatly reduced.
At present, there is no effective method that can degrade trichlorophenol in wastewater.

Method used

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  • Method of catalyzing hydrogen peroxide with molybdate-carried ion exchange resin to degrade trichlorophenol
  • Method of catalyzing hydrogen peroxide with molybdate-carried ion exchange resin to degrade trichlorophenol
  • Method of catalyzing hydrogen peroxide with molybdate-carried ion exchange resin to degrade trichlorophenol

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Experimental program
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Embodiment Construction

[0020] A. Experimental part:

[0021] 1) Instruments and reagents:

[0022] An Agilent 6890N gas chromatograph is equipped with an ECD detector to determine the concentration of trichlorophenol in the degradation system, and the chromatographic column is a DB-5 chromatographic column (60m×0.25mm, 25μm). The inlet is in splitless mode, the temperature is 250°C; the purge flow rate is 1mL min -1 , Purge time: 0.5min. The initial temperature is 150°C, keep for 3min; at 30°C·min -1 The speed was raised to 300°C and kept for 10 minutes. The detector temperature was 330°C.

[0023] The solid-phase microextraction handle and polydimethylsiloxane (PDMS, 100 μm) extraction head are products of Supelco Inc (Bellefonte, PA, USA). Trichlorophene and trimethyl hydroxysulfide were purchased from Bailingwei Company without any purification steps before use. Sodium molybdate and hydrogen peroxide were purchased from Henan Jiaozuo Chemical Reagent Company, and 717 strong basic styrene an...

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Abstract

The invention discloses a method of catalyzing hydrogen peroxide with molybdate-carried ion exchange resin to degrade trichlorophenol, which comprises the following concrete steps: taking a proper amount of resin, soaking the resin in deionized water, adding a NaOH solution and stirring the solution to convert the resin into an OH- type; in the reaction system, adding a certain amount of molybdate to 5g of OH- resin to obtain an Resin-Mo heterogeneous catalyst; in the reaction system, adding a sufficient amount of H2O2 to start the reaction; and in the reaction system, adjusting the pH value to 8-11 with the water solution of phosphoric acid and sodium hydroxide, under the reaction condition of reacting for 60 minutes at the temperature of 35-45 DEG C; and under the catalysis of the molybdate, degrading the trichlorophenol in the waste water with the hydrogen peroxide under the weak base condition. Under the optimal experiment condition, more than 95 percent of trichlorophenol can be degraded within 60 minutes.

Description

Technical field: [0001] The invention relates to a degradation method, in particular to a method for ion-exchange resin-supported molybdate to catalyze hydrogen peroxide to degrade trichlorophenol, and belongs to the field of chemical engineering. Background technique: [0002] Chlorophenols have been widely used as pesticides, wood preservatives, and paper additives, and they can be detected in relatively high concentrations in the environment. Due to its persistence, toxicity, and carcinogenicity, it has been identified as a priority environmental pollutant by the EPA. The Fenton reaction or Fenton-like reaction using hydrogen peroxide as the oxidant and the transition metal salt as the catalyst produces hydroxyl radicals with high oxidation activity, which have been applied to the degradation of chlorophenols as a cheap and efficient advanced oxidation process. Has been successfully applied in the degradation of chlorophenols. However, there is a shortcoming in the Fent...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/66C02F1/58C02F101/36
Inventor 邰超赵同谦武俐董晶晶肖春艳周天健何晓祺王晴晴
Owner HENAN POLYTECHNIC UNIV
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