几种取代酚酸对二氧化锰引起的五氯酚转化作用的影响

本文采用室内实验方法,研究了模拟几种甲氧基取代和羟基取代的酚酸对五氯酚转化作用的影响。结果表明,苯甲酸结构的取代酚酸对五氯酚转化的影响要比肉桂酸结构的取代酚酸更强烈;羟基取代的酚酸对五氯酚转化的阻碍作用比甲氧基取代酚酸的明显,并且随着取代基数目的增加,其表现出的阻碍作用更加的显著。由此得出,酚酸对五氯酚转化的影响一方面归因于酚酸的类型以及取代基的类型和数目不同,另一方面也说明在取代酚酸的影响下五氯酚的转化经历了不同的机理。

Effects of Several Substituted Phenolic Acids on Transformation of Pentachlorophenol Mediated by Manganese Dioxide

Pentachlorophenol (PCP) can be transformed in soil through oxidative reaction mediated by manganese dioxide. In this paper, the effects of several substituted phenolic acids with different structures on the transformation of PCP in the presence of manganese dioxide were investigated. The results in this study demonstrated that substituted benzoic acids affected the disappearance of PCP more strongly than did substituted cinnamic acids. In addition, hydroxylated phenolic acids retarded the removal of PCP more strongly than methoxylated phenolic acids did and the transformation of PCP also decreased with the increased number of substituted groups. Therefore, on one hand, this result could be attributed to the type of substituted phenolic acids and the type and number of substituted groups. On the other hand, this result also displayed that PCP underwent different transformed mechanisms under the influence of several substituted phenolic acid.