Resin adsorption method for organic chemical wastewater treatment

1. Principle of resin adsorption method

In the current commonly used industrial organic chemical wastewater treatment, resin adsorption method is actually a physical treatment method, it is not through the resin and the organic matter in the wastewater chemical reaction to eliminate harmful substances, but the use of organic matter soluble in resin characteristics to adsorb harmful organic matter to the resin surface, Common benzene organic matter, phenolic organic matter and nitroorganic matter are easily soluble in resin, can be combined with different types of wastewater, choose different resins to treat wastewater. Resin usually refers to the softening or melting range after heating, softening under the action of external forces have a tendency to flow, at room temperature is solid, semi-solid, and sometimes can be liquid organic polymers. Broadly defined, any polymer compound that can be used as a raw material for processing plastic products is called a resin. Therefore, the range of resin is wide, and the treatment range of organic chemical wastewater is also wide, and the applicability is high.

2. The application practice of resin adsorption method in organic chemical wastewater treatment

Due to the high efficiency of resin adsorption method for the treatment of organic chemical wastewater, and the waste solution can be recycled to produce chemical products after treatment, so as to realize the recycling of resources and turn waste into treasure, which makes resin adsorption method widely used in industrial wastewater treatment. For the common types of chemical wastewater treatment, its specific practical applications are as follows:

(1) Treatment of phenolic wastewater In the process of industrial production, the phenolic organic compounds contained in the discharged organic chemical wastewater are common monophenone organic compounds and polyphenyl cyclic phenolic organic compounds.

① monophenyl ring structure phenols

Because the composition of different monophenyl organic compounds is also different, the treatment methods are not the same. The specific adsorption process of various monophenyl organic compounds is as follows:

A. Industrial wastewater for phenol production by sulfonated alkali melting process.

The wastewater should be treated with NKA resin and H-103 resin. According to the results, the adsorption capacity of the resin is 150 ~ 250g/L, and the concentration of phenols in the final wastewater is below 0.5mg/L, and the adsorption efficiency of phenols is 99.99%. When treated with dilute lye, the desorption capacity of phenol is 95% and the removal capacity of COD is 70%. After comparison, it is found that the resin adsorption method has a very good effect on the treatment of this kind of wastewater, and can be widely used in the phenol-containing wastewater produced by the p-sulfonated alkali melting process.

B. In the industrial production process, if the isopropyl benzene oxidation method is applied, industrial wastewater containing phenol will be formed after the reaction. CHA-101 resin can be used to treat this wastewater, and phenol can be quickly adsorbed to this resin, with the adsorption effect of phenol exceeding 95%, and the efficiency of wastewater treatment is high.

C. For wastewater containing diisopropylbenzene peroxide in industrial discharge, NKA resin should be selected for adsorption when purifying such wastewater. According to relevant tests, the content of phenolic harmful organic matter after adsorption is reduced to below the discharge standard, which can be applied to the treatment of chemical wastewater.

D. To treat wastewater containing mononitro and polynitro phenols, it is necessary to apply H-103 resin for adsorption, which can adsorb 99% of harmful phenolic substances on the surface, significantly reduce the content of phenols in wastewater, and avoid pollution of water resources by industrial wastewater.

② Polyphenyl ring structure

A. naphthol wastewater.

The wastewater containing 2-naphthol will be produced in the synthesis of 2-naphthol acid. The secondary wastewater should be treated by CHA-111 resin process, which can absorb 99% of 2-naphthol and effectively recover 2-naphthol.

B. Bisphenol A waste solution.

Many companies will use sulfuric acid as A catalyst, and use phenol and acetone condensation method to produce bisphenol A, which will lead to a more acidic phenol containing wastewater, the phenol content of the wastewater can reach 7.0g/L. Therefore, the treatment of such wastewater should use H-103 resin method, which can remove 95% of phenol and 70% of COD.

(2) Treatment of carboxylic (sulfonate) acid compounds wastewater

① In the treatment of industrial wastewater, the wastewater containing salicylic acid can also be treated with H-103 resin, which can purify the salicylic acid in the wastewater to less than 5%. At the same time, combined with the above content, we can know that H-103 resin can also effectively purify phenolic organic compounds. Therefore, H-103 resin is widely used in organic chemical wastewater.

When the industrial wastewater containing sorbate is treated, H-103 resin can usually be used for adsorption, and ethanol solution can be added at the same time of adsorption treatment, which can dissolve sorbate into ethanol solution. This wastewater solution can also be used for the production of industrial organic matter and realize the recycling of chemical resources.

(3) Treatment of nitrogen organic compound wastewater

In chemical production, some organic compounds containing nitrogen are often produced, if nitrogen is not thorough enough in the reaction, it will produce organic compounds containing nitrogen, this organic matter is more harmful, in its treatment, we must pay attention to the efficiency and quality of treatment.

① Aniline wastewater in chemical production, if the wastewater contains aniline organic matter, then we must pay attention to the treatment of this organic matter, aniline organic matter is more toxic, the treatment is more complex, we must ensure that its emissions can be reduced to 0 before it can be discharged into the drainage system. To apply resin multiple adsorption, and finally use chemical methods to eliminate aniline organic matter, to ensure that the wastewater does not contain such substances.

When wastewater containing nitro organic matter is treated, CHA111 resin can be used for treatment, which has a high purification degree for nitro matter and can reach 99% removal rate.

3, the development and prospect of resin adsorption for organic chemical wastewater treatment

Combined with the above content, we can know that the resin adsorption method for the treatment of organic chemical wastewater has a wide range of application, can be used for adsorption of various types of organic matter, and some adsorption processes can also recycle wastewater, to achieve the realization of waste into treasure, in line with the current concept of sustainable development. At present, China's chemical organic wastewater treatment technology is more, in the application of resin adsorption method technical personnel research is also more in-depth, compared with various treatment methods, the resin adsorption method is also optimized. In order to improve the treatment efficiency of the resin adsorption method, the traditional single-stage adsorption is developed into a two-stage adsorption. The efficiency of this adsorption method is significantly improved, and the adsorption has a wider range of application. In order to further promote the application of resin adsorption method in the treatment of chemical organic wastewater, people are constantly developing new numerical types to solve some harmful organic matter that is difficult to adsorb, and can continuously expand the application range of resin adsorption method. Combined with the current concept of sustainable development in China, the resin adsorption method is simple to operate in the treatment of organic chemical wastewater, and does not produce secondary pollution, and its treatment process can also recycle waste liquid to achieve the recycling of chemical elements, so this adsorption treatment method is more suitable for the current chemical wastewater treatment industry, and has a good application prospect. The industry must conduct in-depth research and develop more suitable resin types to purify different harmful organic compounds.

4. Conclusion

In summary, with the continuous development of China's economy, China's industrialization process is accelerated, and the pollution degree of wastewater generated by industrial production is becoming more and more serious for the urban environment, which greatly affects the water health and living environment of urban residents. In order to promote industrial development on the road to sustainable development, we should pay attention to the treatment of industrial wastewater, combined with the advantages of resin adsorption treatment, for the treatment of different types of harmful organic matter, so that industrial wastewater can be reduced to the discharge standard, so that the chemical production process can meet the environmental requirements, and promote China's chemical industry to embark on the road of sustainable development.