Method for degrading polybrominated diphenyl ethers through synergy between surface active agent and nano-iron

Abstract

The invention discloses a method for degrading polybrominated diphenyl ethers through synergy between surface active agent and nano-iron. The method comprises the following steps: zero-valent nano-iron is prepared to solution, and is mixed with solution of the polybrominated diphenyl ethers; the surface active agent uses cetyl pyridinium chloride or polyethylene glycol octylphenol ether; and reaction conditions are normal pressure and normal pressure. The method performs synergistic application for the surface active agent and the zero-valent nano-iron to reduce and degrade the polybrominated diphenyl ethers; compared with simple nano-iron powder, the surface active agent can accelerate contact between the zero-valent nano-iron and products to be degraded to quicken the degrading speed, and accelerates the dispersion of the zero-valent nano-iron to improve the utilization rate of the iron; and the method largely quickens the degrading speed of bromine generation homologs, and shortens the reaction time.

Description

technical field [0001] The invention discloses a method for degrading polybrominated diphenyl ethers by synergizing nano-iron with surfactants. Background technique [0002] Polybrominated diphenyl ether is a brominated flame retardant with excellent performance, which is widely used in various industrial and consumer products. At the same time, polybrominated diphenyl ether is also a class of persistent organic pollutants. High lipophilicity, low water solubility, bioaccumulation and enrichment along the food chain. At present, the research on the degradation and elimination technology of polybrominated diphenyl ethers has received extensive attention. Studies have shown that nano-zero-valent iron can be used to degrade halogenated alicyclic and aromatic compounds due to its large specific surface area and high activity. However, due to problems such as easy aggregation of nanometer zero-valent iron and insufficient contact between polybrominated diphenyl ether and nanome...

AI Technical Summary

Problems solved by technology

However, due to problems such as the easy agglomeration of nano-zero-valent iron and the insufficient contact between polybrominated diphenyl ether and nano-zero-valent iron, the product of dibromine did not appear until the tenth day of the reaction, so the degradation rate still needs to be improved.

However, due to problems such as the easy agglomeration of nano-zero-valent iron and the insufficient contact between polybrominated diphenyl ether and nano-zero-valent iron, the product of dibromine did not appear until the tenth day of the reaction, so the degradation rate still needs to be improved.