Immobilized cationized beta-cyclodextrin chloromethylated polystyrene polymer and method for adsorbing and recovering phenols in industrial wastewater

Abstract

The invention discloses an immobilized cationized beta-cyclodextrin chloromethylated polystyrene polymer and a method for adsorbing and recovering phenols in industrial wastewater. According to the method, chloromethylated polystyrene is immobilized with cationized cyclodextrin to form the polymer; the polymer is adopted as an adsorbent; phenols substances in the industrial water are selectively adsorbed in the polymer; regeneration and reuse of an adsorption material can be realized through simple desorption treatment; the adsorbent is utilized for adsorption treatment on the industrial wastewater containing such phenolic hydroxyl phenols as cresol, phenol, chlophenol and salicylic acid, and can adsorb 96 mg / g of cresol, 140 mg / g of phenol, 250 mg / g of chlophenol and 170 mg / g of salicylic acid to the maximum extent; adsorption equilibrium can be realized within 2 hours; test results show that the phenols adsorption capacity of the absorbent is obviously higher than the maximum phenols adsorption capacities of such commercial adsorption materials as polyamide, DM 301 and S-8. The polymer and the method have the advantages that the preparation process is simple, the reuse can be realized, the cost is low, the operation is simple, the adsorption efficiency is high, energy conservation and environment protection are realized, phenols can be recovered, and the like.

Description

technical field [0001] The invention belongs to the technical field of post-treatment of wastewater, and in particular relates to a chloromethylated polystyrene polymer immobilized with cationized β-cyclodextrin and a method for adsorbing and recovering phenols in industrial wastewater. Background technique [0002] At present, my country's environmental pollution is very serious, and organic matter pollution is still a difficult problem to solve. Traditional environmental protection technology and environmental protection materials can no longer effectively solve the increasing variety of complex pollution problems. Therefore, new environmental protection materials are developed, and low-cost, Water purification materials without secondary pollution, reducing water treatment costs and improving purification efficiency have become urgent problems in the field of environmental protection. However, the waste water of phenolic substances in organic matter pollution is extremely ...

AI Technical Summary

Problems solved by technology

Chinese patent (publication number CN101417834A2009) discloses a method of first using heterogeneous catalytic oxidation technology to make phenolic wastewater pass through KL-13X series of oxidation towers to catalyze oxidation on the catalyst, thereby degrading phenolic wastewater. Solid waste, but this method cannot recover phenols to achieve the unity of economy and environmental protection, and it cannot be reused, which may cause waste gas pollution

Chinese patent (publication number CN103304005A2013) has reported a kind of utilizing hollow fiber membrane to remove the phenol in phenolic waste water, with tributyl phosphate as extractant carrier, with kerosene or benzene as diluent, extractant and stripping agent are mixed Make a treatment solution, inject the treatment solution into the tube side of the membrane device, and inject the wastewater into the shell side to achieve the separation effect. Although the treatment capacity is large, the device is expensive, and the use of benzene and other substances will cause secondary pollution to the environment, and the treatment process is troublesome.

Recently, the Chinese patent (publication number CN104724783A2015) announced a method of extracting phenolic wastewater using the dephenolic extractant methyl n-butyl ketone to obtain an extract phase and a raffinate phase. This method can effectively remove high-concentration phenolic wastewater. However, this method requires a specific extraction agent, which is costly and cannot be reused.

[0004] Although the adsorption method is widely used in the field of wastewater treatment, there are few reports on the targeted adsorption materials for specific organic pollutants. The weak interaction between the host and the object and the synergy of the interaction force are used to improve the adsorption of the object. The research of phenolic compounds has attracted much attention in recent years. This kind of materials has obvious adsorption effect on specific organic substances. Therefore, it is necessary to develop the adsorption recovery method and the preparation of adsorption materials specially for phenolic compounds in water.

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