零价铁降解多溴联苯醚影响条件的研究

Studies on Effect Conditions for Removal of Polybrominated Diphenyl Ethers by Zero-Valent Iron

通过离子色谱的方法,利用零价铁对水中的多溴联苯醚进行还原性脱溴,对影响因素进行了研究和探讨。试验结果表明:酸性条件有利于脱溴反应的进行;较高的十溴联苯醚初始浓度有利于脱溴反应的进行;零价铁的粒径越小,其对多溴联苯醚的脱溴效果也越好;温度越高时,多溴联苯醚的脱溴率也越高。研究结果将为利用零价铁渗透式反应墙去除水中的多溴联苯醚污染物提供理论依据。

The factors that influence the reaction rate of reductive debromination of PBDEs using the zero-valent iron powers were studied and discussed with the method of ion chromatography. The experimental results show that, the initial pH seemed to affect the rate of the debromination. The result indicated the effect of pH value on the removal of PBDEs followed the order： pH=5〉pH=7〉pH= 9; the increasing of the initial concentration of PBDEs can result in the increasing of debromination rate; The smaller Fe^0 particle size is in favor of PBDEs debromination; the higher temperature is in favor of PBDEs debromination. The result of the research can provide theoretical basis for site remediation technologies of PBDEs pollution in water.