三唑磷在水体系中的光化学降解研究  

Study on Photochemical Degradation of Triazophos in Aqueous Solutions

作　　者：陈容[1] 杨桂朋[1] 周立敏[1] 孙晓春[1] 

机构地区：[1]中国海洋大学海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2010年第S1期185-190,共6页Periodical of Ocean University of China

基　　金：教育部科学技术研究重点项目(105105);教育部新世纪优秀人才支持计划项目(NCET-04-0643);山东省"泰山学者"建设工程专项经费资助(JS200510016)

摘　　要：本文研究三唑磷在天然海水、人工海水和去离子水中的光化学降解情况。在300 W高压汞灯照射下,三唑磷在3种水体中均发生明显的光降解,且降解符合一级反应动力学行为,其光解速率常数在天然海水、去离子水和人工海水中分别为0.008 61,0.006 42和0.006 33 min-1。在3种溶液介质中,三唑磷光解速率受三唑磷初始浓度的影响,其速率常数均随着三唑磷初始浓度的增大而减小。实验发现溶液中加入重金属离子Cu2+和Cd2+会抑制三唑磷的光降解速率,添加重金属离子浓度不同,则抑制程度不同。The photochemical degradation of triazophos was studied in natural seawater(NSW),artificial seawater(ASW) and distilled water(DW) in this paper.Triazophos could be obviously degraded in three aqueous solutions under the irradiation of high-pressure mercury lamp(HPML),which showed the first-order reaction kinetic behavior,and the rate constants(k) of photochemical degradation of triazophos in natural seawater,distilled water and artificial seawater were 0.008 61,0.006 42,0.006 33 min-1,respectively.The photodegradation rates of triazophos were influenced by triazophos initial concentrations,and the rate constants of photochemical degradation of triazophos decreased with the increasing initial concentration in three aqueous solutions.In addition,the result showed that the addition of heavy metal ions such as Cu2+ and Cd2+ to the three aqueous solutions could restrain the photo-degradation rates of triazophos.The restrained degree changed with the concentrations of heavy metal ions.

关 键 词：三唑磷 光化学降解 水溶液 重金属离子 

分 类 号：P734[天文地球—海洋化学]