氨唑草酮的水解、挥发及其在水-沉积物系统中的降解特性

doi:10.3969/j.issn.1004-1524.2019.12.15

浙江农业学报 ›› 2019, Vol. 31 ›› Issue (12): 2057-2063.DOI: 10.3969/j.issn.1004-1524.2019.12.15

氨唑草酮的水解、挥发及其在水-沉积物系统中的降解特性

何开雨, 汤涛, 宣彩迪, 吴园园, 何红梅, 吴珉^*, 赵学平, 徐霞红, 王强

农产品质量安全危害因子与风险防控国家重点实验室(筹),农业农村部农药残留检测重点实验室,浙江省农业科学院农产品质量标准研究所,浙江杭州 310021

收稿日期:2019-08-27 出版日期:2019-12-25 发布日期:2019-12-25
通讯作者: 吴珉,E-mail: 34588216@qq.com
作者简介:何开雨(1984-),男,湖南永州人,博士,助理研究员,主要从事农药环境行为与农药残留检测研究。E-mail: 15968148926@163.com
基金资助:
省部共建农产品质量安全国家重点实验室开放课题(2010DS700124-KF1911)

Hydrolysis, volatility and degradation of amicarbazone in water-sediment system

HE Kaiyu, TANG Tao, XUAN Caidi, WU Yuanyuan, HE Hongmei, WU Min^*, ZHAO Xueping, XU Xiahong, WANG Qiang

State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products(in Prepared), Key Laboratory for Pesticide Residue Detection of Ministry of Agriculture and Rural Affairs, Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China

Received:2019-08-27 Online:2019-12-25 Published:2019-12-25

摘要/Abstract

摘要： 为评价氨唑草酮的环境安全性,参照国家标准GB/T 31270-2014的要求,采用室内模拟法研究了氨唑草酮在不同温度和不同pH值缓冲溶液中的水解特性、在不同环境介质中的挥发特性,以及在2种水-沉积物系统中的降解特性。结果表明:氨唑草酮在25 ℃时,在pH值为4或7的缓冲液中水解半衰期均长于365 d,在pH值为9的缓冲液中水解半衰期为90.0 d,属于难水解至中等水解农药。在20~25 ℃、气体流速500 mL·min^-1的条件下,氨唑草酮在空气、水和土壤中的挥发率均小于1%,属于难挥发农药。氨唑草酮在湖泊(杭州西湖)水-沉积物系统和河流(京杭大运河)水-沉积物系统中的降解符合一级动力学方程,好氧降解半衰期分别为408 d和630 d,厌氧降解半衰期分别为248 d和990 d,在水-沉积物系统中属于难降解农药。

关键词: 氨唑草酮, 水解, 挥发性, 降解, 水-沉积物系统

Abstract: In order to evaluate the risk of amicarbazone in the environment, the hydrolysis, volatility and degradation characteristics of amicarbazone in water, soil and water-sediment system were investigated by laboratory tests according to the national standard GB/T 31270-2014. At 25 ℃, the half-life periods of hydrolysis were>365 d,>365 d and 90 d in buffer solutions with pH of 4, 7, and 9, respectively. The volatility rate of amicarbazone in air, water and soil was less than 1% under the conditions of 20-25 ℃ and 500 mL·min^-1 gas flow rate, which suggested amicarbazone was difficult to volatilize. The degradation of amicarbazone in lake (West Lake) and river (Grand Channel) water-sediment system accorded with the first-order kinetic equation. The degradation half-life period of amicarbazone in lake and rive water-sediment system was 408 d and 630 d, respectively, in aerobic conditions, and was 248 d and 990 d, respectively, in anaerobic conditions. These results indicated that amicarbazone was hard to degrade in water-sediment system.

Key words: amicarbazone, hydrolysis, volatility, degradation, water-sediment system

中图分类号:

X592

何开雨, 汤涛, 宣彩迪, 吴园园, 何红梅, 吴珉, 赵学平, 徐霞红, 王强. 氨唑草酮的水解、挥发及其在水-沉积物系统中的降解特性[J]. 浙江农业学报, 2019, 31(12): 2057-2063.

HE Kaiyu, TANG Tao, XUAN Caidi, WU Yuanyuan, HE Hongmei, WU Min, ZHAO Xueping, XU Xiahong, WANG Qiang. Hydrolysis, volatility and degradation of amicarbazone in water-sediment system[J]. , 2019, 31(12): 2057-2063.

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氨唑草酮的水解、挥发及其在水-沉积物系统中的降解特性

Hydrolysis, volatility and degradation of amicarbazone in water-sediment system

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