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A method for efficiently removing refractory pollutants in water bodies

A technology that is difficult to degrade and pollutants, applied in the fields of water pollutants, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of equipment specific technology promotion and complex treatment technology, etc., to achieve excellent removal effect, overcome The effect of complex equipment, efficient degradation effect

Active Publication Date: 2020-05-26
SICHUAN AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the current treatment technologies for refractory water pollutants are complex or based on solid treatment agents.
Although relying on equipment for water treatment has the advantages of scale and automation, the particularity of the equipment makes the promotion of the technology unsuitable.
Although the solid treatment agent has the advantages of quickness and convenience, some solid treatment agents can even be made from waste raw materials, and have the function of "treating waste with waste", but the solid treatment agent also faces difficulties in the subsequent solid waste treatment. Environmental issues that cannot be ignored
More importantly, the existing "waste to waste" solid treatment agent preparation technology still faces the problem of production cost, which makes it face cost pressure when it is used to treat refractory pollutants in wastewater

Method used

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  • A method for efficiently removing refractory pollutants in water bodies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Wheat straw is crushed through a 40-mesh sieve to obtain wheat straw powder; 8g of wheat straw powder is put into the reactor, and 80g of phosphoric acid and hydrogen peroxide mixed solution is added to the reactor at a solid-to-liquid ratio of 1:10, wherein The mass fraction of concentrated phosphoric acid is 65.0%, the mass fraction of hydrogen peroxide is 7.0%, the temperature of pretreatment is 50 ℃, and the pretreatment time is 4h; The degradation reaction is carried out at 50°C in a closed container (50ml specification) in 7.5ml of water refractory pollutant waste liquid.

[0032] PFOS potassium salt, bisphenol A, atrazine, and tetracycline at a concentration of 100ppm were used as refractory water pollutants, and four corresponding experiments were carried out.

[0033] And based on the change of reaction concentration before and after, the removal rate of pollutants was measured for the above four groups of experiments, and the results are shown in Table 1:

[...

Embodiment 2

[0037] Adjust the mass fraction of concentrated phosphoric acid to be 68.0%, the mass fraction of hydrogen peroxide to be 5.0%, and the rest remain consistent with Example 1. The removal rate of 4 kinds of pollutants still reached more than 80%, and the removal rate of bisphenol A was 89.1%.

Embodiment 3

[0039] Adjust the weight of the wheat straw powder to 10 g, the volume of the refractory pollutant waste liquid to 5 ml, and keep the rest consistent with Example 1. The removal rate of 4 kinds of pollutants still reached more than 80%, and the removal rate of bisphenol A was 88.8%.

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Abstract

The invention provides a method for efficiently removing refractory pollutants in a water body. The method comprises the following steps: collecting waste gas produced by pretreatment of wheat straw,introducing the waste gas into a sealed container filled with a waste liquid of refractory pollutants of a water body, and carrying out a degradation reaction in a temperature of 30-80 DEG C. The method provided by the invention has an excellent removal effect on common refractory pollutants of a water body, overcomes the defect of the requirement of complex equipment in the prior art, avoids thedefects that special modification treatment is needed to be carried out on raw materials in the prior solid-base treatment technology, realizes the high-efficiency degradation effect on the refractorypollutants, really realizes the technical goal of ''directly treating waste with waste'', and realizes the organic combination of two industries of biological ethanol preparation and wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method for efficiently removing refractory pollutants in water bodies. Background technique [0002] my country is a traditional textile country. In recent years, with the request for economic structural transformation, the improvement of textile production waste treatment technology will receive more and more attention. Dyestuff is one of the main pollutants in the textile production process. Its composition is complex, and most of them are biologically toxic and refractory. It is a kind of wastewater that is difficult to treat. [0003] At present, the traditional methods of pollution treatment are adsorption, membrane separation, ozone oxidation and photocatalysis. [0004] However, the current water treatment technology for refractory pollutants (such as perfluorooctane sulfonate potassium salt, bisphenol A, atrazine and tetracycline) is not mature...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F101/34C02F101/36C02F101/38C02F103/30
CPCC02F1/00C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2101/40C02F2103/30
Inventor 沈飞龙琭璐王卿向春晓刘章林吴孟珂刘太聪曾咏梅邓仕槐张延宗杨刚
Owner SICHUAN AGRI UNIV