Method for treating phthalate wastewater by means of catalyzing persulfate by utilization of supported activated carbon in microwave inducement manner

A phthalate and persulfate technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc. OH has short half-life and other problems, to achieve the effect of no secondary pollution, easy implementation and good stability

Active Publication Date: 2016-05-11
广州中德环境技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of the traditional advanced oxidation method, such as large dosage of oxidant, high requirement on pH value, low degree of mineralization of orga

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] Example 1

[0020] 1. Put 20 mesh activated carbon into 0.5M nitric acid solution and soak for 24 hours, and then repeatedly rinse with distilled water until it is neutral, and dry for use;

[0021] 2. Mix 15% ferrous sulfate, 15% ferric chloride and 10% copper sulfate in a mass ratio of 1:1:1, and mix the activated carbon and iron-containing copper mixed solution of step (1) in a mass-volume ratio of 1 :15 for mixing, add 5M sodium hydroxide solution dropwise to pH 9.0 under rapid stirring, then aging in a boiling water bath for 4 hours, cooling and filtering, calcining at 250°C for 2 hours under nitrogen protection to obtain activated carbon-supported metal catalyst;

[0022] 3. Take 100 mL of dibutyl phthalate (DBP) wastewater, add 1 mL of 0.4 mM sodium persulfate solution, mix well and adjust the pH of the solution to 6.0, add 0.1 g of loaded activated carbon, and put it into a circulating microwave reaction tube The frequency conversion microwave reactor with a set temp...

Example Embodiment

[0024] Example 2

[0025] 1. Soak 50 mesh activated carbon in 0.1M nitric acid solution for 24 hours, then repeatedly rinse with distilled water until it is neutral, and dry it for later use;

[0026] 2. Mix 30% ferrous sulfate, 30% ferric chloride and 5% copper sulfate in a mass ratio of 1:1:1, and mix the activated carbon and iron-containing copper mixed solution of step (1) in a mass-volume ratio of 1 :20 for mixing, add dropwise 5M sodium hydroxide solution to pH 10.0 under rapid stirring, then aging in a boiling water bath for 4h, cooling and filtering, calcining at 400℃ for 2h under nitrogen protection to obtain activated carbon-supported metal catalyst;

[0027] 3. Take 100mL of (2-ethylhexyl) phthalate (DEHP) wastewater, add 1mL of 0.3mM sodium persulfate solution, mix well and adjust the pH of the solution to 7.0, add 0.2g of loaded activated carbon, and put it into the belt Frequency conversion microwave reactor with circulating microwave reaction tube, set the temperatur...

Example Embodiment

[0029] Example 3

[0030] 1. Soak 40 mesh activated carbon in 0.3M nitric acid solution for 24 hours, then repeatedly rinse with distilled water until it is neutral, and dry it for later use;

[0031] 2. Mix 20% ferrous sulfate, 20% ferric chloride and 8% copper sulfate in a mass ratio of 1:1:1, and mix the activated carbon and iron-containing copper mixed solution of step (1) in a mass-volume ratio of 1 :18 for mixing, add dropwise 5M sodium hydroxide solution to pH 9.0 under rapid stirring, then aging in a boiling water bath for 4 hours, cooling and filtering, calcining at 300°C for 2 hours under nitrogen protection to obtain activated carbon-supported metal catalyst;

[0032] 3. Take 100 mL of dibutyl phthalate (DBP) wastewater, add 0.5 mL of 0.4 mM sodium persulfate solution, mix well and adjust the pH of the solution to 9.0, add 0.1 g of loaded activated carbon, and put it into the microwave reaction Tube frequency conversion microwave reactor, set the temperature to 75℃, and ...

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Abstract

The invention relates to a method for treating phthalate wastewater by means of catalyzing persulfate by utilization of supported activated carbon in a microwave inducement manner, belonging to the technical field of phthalate wastewater treatment. The method comprises the following steps of adding a sodium persulfate solution with a concentration of 0.3 to 0.4 mM into phthalate wastewater with a concentration of 1500 to 3500 (mu)g/L according to a volume ratio of 0.5 to 1 percent, adjusting a pH value of the solution to be 6.0 to 9.0, then adding an activated carbon supported metal catalyst according to a proportion of 1 to 2 permillage, uniformly stirring, putting in a frequency conversion microwave reactor, setting a temperature of 70 to 80 DEG C, continuously reacting for 25 to 30 minutes, and taking a mixed solution to measure a phthalate concentration, wherein the phthalate removal rate reaches above 90 percent. The method disclosed by the invention has the advantages that microwave, supported activated carbon and persulfate act synergistically; the thermal effect and non-thermal effect of the microwave, the strong oxidation effect of the persulfate as well as the adsorptive catalysis and heat sensitization effects of the supported activated carbon are sufficiently exerted; the effects of simplicity and high efficiency in technological operation, easiness in implementation, freeness from secondary pollution, high oxidation efficiency and good removal effect are achieved.

Description

technical field [0001] The invention relates to a method for treating phthalate wastewater, in particular to a method for treating phthalate wastewater with microwave-induced loaded activated carbon catalyzed persulfate, which belongs to the phthalate wastewater treatment technology field. Background technique [0002] In recent years, the environmental behavior of endocrine disruptors has received widespread attention from the international community and has become a hot issue in the field of environmental science. Among them, phthalates are an important class of environmental hormone compounds, which have bioaccumulation and amplification effects. , show a strong affinity to animals and plants, and enter the food chain through the bioaccumulation of animals and plants, interfere with the normal level of hormones in the blood, and a small amount of phthalates in the environment can affect biological endocrine production Interfering with the reproduction, development and be...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/30C02F1/28
CPCC02F1/283C02F1/302C02F1/725C02F2101/34
Inventor 林亲铁谢红艳黎宏飞何晋勇
Owner 广州中德环境技术研究院有限公司
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