Pb^(2+)和Fe^(3+)对三唑磷在水环境中光降解影响研究  

Study on the influences of Pb and Fe on photochemical degradation of triazophos in water environment

作　　者：陈容[1] 孟春霞[1] 周立敏[1] CHEN Rong;MENG Chun-xia;ZHOU Li-min(College of Chemistry Pb^(2+) and Fe^(3+) Chemical Engineering,Ocean University of China,Qingdao 266100,Shandong)

机构地区：[1]中国海洋大学化学化工学院,山东青岛266100

出　　处：《海洋湖沼通报》2021年第4期121-126,共6页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(41876122)。

摘　　要：本文探索研究了Pb^(2+)和Fe^(3+)在不同水溶液中对三唑磷的光降解影响。结果表明:在300 W高压汞灯照射下,在去离子水中,不同浓度的Pb^(2+)对三唑磷的光降解均起抑制作用。在人工海水中,0.01 mg/L和0.1 mg/L的Pb^(2+)对三唑磷的光降解有抑制作用,而1 mg/L的Pb^(2+)明显地促进了光降解。在天然海水中,1 mg/L的Pb^(2+)对三唑磷的光降解起了抑制作用,而0.01 mg/L和0.1 mg/L的Pb^(2+)在光照前60 min促进了光降解,后60 min则起了抑制作用。不同浓度的Fe^(3+)在人工海水和去离子水中会促进光降解,而在天然海水中则表现为抑制作用。该实验模拟结果可为水环境中该种农药污染的治理提供重要的理论依据。The influences of Pb^(2+)and Fe^(3+)on photochemical degradation of triazophos in different aqueous solutions were studied in this paper.The result showed that different concentrations of Pb^(2+)showed the restraining effects on photochemical degradation of triazophos in distilled water(DW)under the irradiation of 300 W high-pressure mercury lamp(HPML).0.01 mg/L and 0.1 mg/L of Pb^(2+)had the restraining effects on photochemical degradation of triazophos in artificial seawate(ASW).When the concentration of Pb^(2+)was 1 mg/L,photochemical degradation of triazophos was accelerated in ASW.1 mg/L of Pb^(2+)had the restraining effect on photochemical degradation of triazophos in natural seawater(NSW).0.01 mg/L and 0.1 mg/L of Pb^(2+)could accelerate photochemical degradation of triazophos 60 min before the irradiation,but showed the restraining effects 60 min after the irradiation in NSW.Different concentrations of Fe^(3+)could accelerate photochemical degradation of triazophos in ASW and DW,but showed the restraining effects in NSW.The experimental results can provide important theoretical basis for the control of this pesticide pollution in water environment.

关 键 词：三唑磷 光化学降解 Pb^(2+) Fe^(3+) 水溶液 

分 类 号：P714.4[天文地球—海洋科学]