臭氧预氧化对芘在天然有机物中分配行为的影响  

Influence of ozone preoxidation on the partitioning behavior of pyrene in natural organic matter

作　　者：郭瑾[1] 马军[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《中国环境科学》2007年第3期327-331,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(50578051);黑龙江省自然科学基金资助项目(GB04C20101)

摘　　要：以疏水性有机物——芘为代表,考察了臭氧预氧化处理对高稳定性有机污染物在天然有机物(NOM)中分配行为的影响.结果表明,芘在不同性质NOM中分配系数(Koc)的大小与NOM中芳香结构和疏水基团含量有关,芘在液相、吸附相NOM中的分配行为受NOM自身特性、吸附性能及吸附剂表面有机碳覆盖率(foc)大小的影响.臭氧预氧化能够破坏NOM中的芳香结构和疏水结构,削弱NOM与芘之间的相互作用,降低芘的Koc,臭氧预氧化对吸附相NOM疏水结构的破坏是造成芘在吸附相NOM中分配能力降低的主要原因.Taken hydrophobic organic contaminants ——pyrene as representative pollutant, the influence of ozonation on the partition behavior of high stability organic pollutant in the natural organic matter （NOM） was inspected. The size of pyrene partitioning coefficient （Koc） in different property NOM was related with aromatic structure and the hydrophobic basic group content in NOM. The partitioning behavior of pyrene in soluble and adsorbed phase NOM was affected by NOM itself characteristics, adsorption property and the size of adsorbent surface organic carbon of covering rate （foc） Ozone preoxidation could destroy the aromatic and hydrophobic structures in NOM, weaken the interaction between NOM and pyrene, lower the pyrene partitioning coefficient. The destruction of ozone preoxidation on the hydrophobic structures of NOM was the main cause of decreasing the partitioning ability of pyrene in the adsorbed phase NOM.

关 键 词：臭氧 氧化 天然有机物 疏水性有机物 芘 分配系数 

分 类 号：X703.1[环境科学与工程—环境工程]