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Method for treating chlorpyrifos wastewater by using loess organic/inorganic compound adsorbent

A technology of pyrithione and complex, applied in the direction of adsorption water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as difficulty in large-scale promotion, high operating cost, and change in treatment effect, and achieve Good treatment effect, good safety and easy operation

Inactive Publication Date: 2015-04-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the electrode electrolysis process is complicated and the operating cost is high; the biodegradation process has a long cycle, and the treatment effect is often changed due to the difference in biological activity; the Fenton oxidation process is expensive and difficult to promote on a large scale; Concentrated distillate and incineration waste gas have secondary pollution risks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The method that the loess organic-inorganic composite adsorbent of the present invention treats pyrithione wastewater comprises the following steps:

[0022] 1) Take a certain amount of dry field loess and NaAC-HAC buffer solution with a pH of 4.8, then place the weighed dry field loess and NaAC-HAC buffer solution in an ultrasonic environment, and use NaAC-HAC buffer solution under the condition of heating in a water bath removing the loess carbonate in the upland loess to obtain an organic-inorganic complex, wherein the ratio of upland loess to NaAC-HAC buffer solution is 1 g: 40 mL;

[0023] 2) separating a clay organic-inorganic complex with a particle size of less than 2 μm from the organic-inorganic complex obtained in step 1);

[0024] 3) cleaning and drying the clay organic-inorganic complex obtained in step 2) to obtain a clay organic-inorganic complex with adsorption;

[0025] 4) The clay organic-inorganic complex with adsorption obtained in step 3) is used a...

Embodiment 2

[0034] The method that loess organic-inorganic composite adsorbent of the present invention treats pyrithione wastewater comprises the following steps:

[0035] 1) Take a certain amount of dry field loess and NaAC-HAC buffer solution with a pH of 4.8, then place the weighed dry field loess and NaAC-HAC buffer solution in an ultrasonic environment, and use NaAC-HAC buffer solution under the condition of heating in a water bath removing the loess carbonate in the upland loess to obtain an organic-inorganic complex, wherein the ratio of upland loess to NaAC-HAC buffer solution is 1 g: 30 mL;

[0036] 2) separating a clay organic-inorganic complex with a particle size of less than 2 μm from the organic-inorganic complex obtained in step 1);

[0037] 3) cleaning and drying the clay organic-inorganic complex obtained in step 2) to obtain a clay organic-inorganic complex with adsorption;

[0038] 4) The clay organic-inorganic complex with adsorption obtained in step 3) is used as an...

Embodiment 3

[0047] The method that loess organic-inorganic composite adsorbent of the present invention treats pyrithione wastewater comprises the following steps:

[0048] 1) Take a certain amount of dry field loess and NaAC-HAC buffer solution with a pH of 4.8, then place the weighed dry field loess and NaAC-HAC buffer solution in an ultrasonic environment, and use NaAC-HAC buffer solution under the condition of heating in a water bath removing the loess carbonate in the upland loess to obtain an organic-inorganic complex, wherein the ratio of upland loess to NaAC-HAC buffer solution is 1g:20mL;

[0049] 2) separating a clay organic-inorganic complex with a particle size of less than 2 μm from the organic-inorganic complex obtained in step 1);

[0050] 3) cleaning and drying the clay organic-inorganic complex obtained in step 2) to obtain a clay organic-inorganic complex with adsorption;

[0051] 4) The clay organic-inorganic complex with adsorption obtained in step 3) is used as an ad...

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Abstract

The invention discloses a method for treating chlorpyrifos wastewater by using a loess organic / inorganic compound adsorbent. The method comprises the following steps: 1) taking a certain amount of dry farmland loess as a NaAC-HAC buffer liquid with the pH value of 4.8, subsequently putting the weighed dry farmland loess and the NaAC-HAC buffer liquid into an ultrasonic environment, eliminating the loess carbonate in the dry farmland loess by using the NaAC-HAC buffer liquid, so as to obtain an organic / inorganic compound, separating a cosmid organic / inorganic compound with the particle size smaller than 2mu m from the obtained organic / inorganic compound obtained in the step 1), washing and drying the obtained cosmid organic / inorganic compound so as to obtain a cosmid organic / inorganic compound with the adsorption function, and performing adsorption treatment on the chlorpyrifos wastewater by using the obtained cosmid organic / inorganic compound with the adsorption function, so as to achieve treatment on the chlorpyrifos wastewater. The method is low in cost, simple and convenient to operate, high in practicability, good in security and easy to popularize.

Description

technical field [0001] The invention relates to a method for removing pyrithione in water, in particular to a method for treating pyrithione wastewater with a loess organic-inorganic composite adsorbent. Background technique [0002] Chlorpyrifos (C 9 h 11 Cl 3 NO 3 PS) also known as chlorpyrifos and Lesburn, is a broad-spectrum insecticide developed by Dow Chemical Company in 1964. As a persistent organic pollutant (POPs) and a suspected environmental endocrine disruptor (EEDs), the production and use of chlorpyrifos has been strictly monitored by relevant departments. Chlorpyrifos is one of the most produced and used pesticides in the world, and has been widely used in many regions at home and abroad with the permission of the World Health Organization. The overall utilization rate of pyrithione sprayed in the field is low, and most of it seeps into the surface runoff and underground runoff with the soil, becoming one of the main pesticide pollutants in water bodies. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/58
Inventor 范春辉
Owner SHAANXI UNIV OF SCI & TECH
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