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

• Plant Protection • Previous Articles     Next Articles

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   

  1. 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

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

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