Method for treating phenol-containing wastewater with polyelectrolyte-surfactant

Abstract

The invention discloses a method for treating phenol-containing wastewater with a polyelectrolyte-surfactant. The method comprises the following steps: mixing sodium polymethylacrylate, cetyltrimethylammonium bromide and phenol-containing wastewater, stirring, standing, and performing ultrafiltration to complete treatment of phenol in the wastewater. The method for treating phenol-containing wastewater with the polyelectrolyte-surfactant has the advantages of high removal rate, low energy consumption, no phase change, no secondary pollution, easy achievement of pollutant recycling and automatic operation and the like, and also has the advantages of a simple technology, convenience in operation, low cost and the like; by the method, the phenol can be effectively removed from the wastewater;and the method has a good application value and a good application prospect.

Description

technical field [0001] The invention belongs to the field of treating phenol-containing wastewater, and relates to a method for treating phenol-containing wastewater by using a polyelectrolyte-surfactant. Background technique [0002] Phenolic compounds are an important class of basic organic synthetic materials, which have been widely used in industrial manufacturing, mainly for the manufacture of phenolic resins, polymer materials, ion exchange resins, synthetic fibers, fuels, drugs, explosives, etc. What follows is the generation of a large amount of phenolic wastewater, mainly from gas, coking, petroleum, chemical, preparation, pharmaceutical, paint and other industries. The water polluted by phenol in the environment, after being absorbed by the human body, can make most of it lose its toxicity through the detoxification function in the body, and excreted with urine. If the amount entering the human body exceeds the normal detoxification function of the human body, the ...

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Problems solved by technology

The advantages of the extraction method are less investment in equipment, convenient operation, and low energy consumption. At the same time, it can effectively recover phenolic substances in wastewater, which is suitable for high-concentration phenol-containing wastewater. The disadvantage is that the "back-mixing" in the extraction process is serious, and it is easy to cause solvent loss. and secondary pollution

Advanced oxidation method is an effective method to decompose organic pollutants, but it has disadvantages such as difficult to control intermediate products, easy to cause secondary pollution, and high cost.

Microorganisms have a certain selectivity to the types of organic matter, and the degradation is not thorough enough. Microorganisms are greatly affected by the environment, and it is difficult to achieve large-scale industrial production

The adsorption method is effective in treating phenolic wastewater, and the pollutants are easy to recover, but the adsorbent is easily saturated, and the regeneration process is complex and costly

Ordinary membrane separation methods to treat phenolic wastewater mainly include reverse osmosis and nanofiltration, which have the advantages of high pollutant removal rate, recyclable pollutants, and simple process, but due to the cost of reverse osmosis membrane and nanofiltration membrane Higher operating pressure is required, resulting in high investment and operating costs for membrane treatment of phenolic wastewater, which affects its application in large-scale industrial wastewater treatment

[0004] As far as phenol is concerned, it is a small molecule phenolic pollutant. Although nanofiltration membranes or reverse osmosis membranes can effectively remove phenol in wastewater, the materials of nanofiltration membranes and reverse osmosis membranes are easily affected by the quality of wastewater. It is easy to reduce the service life of nanofiltration membrane and reverse osmosis membrane, and there are problems such as high energy consumption when nanofiltration membrane and reverse osmosis membrane are used to treat phenol-containing wastewater, which is unfavorable to reduce the investment and operation of treating phenol-containing wastewater cost, which severely limits their widespread application in phenol wastewater

In addition, other existing membrane separation technologies, such as micellar enhanced ultrafiltration (MEUF), have disadvantages such as large dosage of chemicals and serious membrane fouling, while polymer enhanced ultrafiltration (PEUF) has poor treatment effect on non-ionic organic pollutants. High cost, high treatment cost, etc., and the phenol wastewater treated by the above technology is difficult to meet the water quality control requirements, which makes how to deal with phenol-containing wastewater has become a hot issue that needs to be solved urgently

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