手性差异对水产养殖沉积物环境中农药氰戊菊酯降解的影响

doi:10.11924/j.issn.1000-6850.casb2020-0727

中国农学通报 ›› 2021, Vol. 37 ›› Issue (28): 153-158.doi: 10.11924/j.issn.1000-6850.casb2020-0727

所属专题：植物保护；水产渔业

手性差异对水产养殖沉积物环境中农药氰戊菊酯降解的影响

宋超¹^,²^,³(), 邹剑敏¹^,²^,³, 汪倩¹^,²^,³, 陈曦¹^,²^,³, 方龙香¹^,²^,³, 裘丽萍¹^,²^,³, 陈家长¹^,²^,³()

¹中国水产科学研究院淡水渔业研究中心,江苏无锡 214081
²农业农村部水产品质量安全环境因子风险评估实验室（无锡）,江苏无锡 214081
³农业农村部水产品质量安全控制重点实验室,北京 100000

收稿日期:2020-11-28 修回日期:2020-12-31 出版日期:2021-10-05 发布日期:2021-10-28
通讯作者: 陈家长
作者简介:宋超,男,1985年出生,江苏溧阳人,副研究员,博士,研究方向：渔业生态环境与水产品质量安全。通信地址：214081 江苏省无锡市滨湖区山水东路9号,Tel：0510-85559936,Email： songc@ffrc.cn。
基金资助:
国家重点研发计划项目“中华绒鳌蟹质量安全保障技术的全链条综合示范”(2019YFC1605802-1);中国水产科学研究院基本科研业务费“南方地区稻蟹综合种养模式下典型危害物污染特征、归趋与富集效应及防控技术研究”(2018HY-ZD0605)

Influence of Chiral Difference on the Degradation of Fenvalerate in Aquaculture Sediment Environment

Song Chao¹^,²^,³(), Zou Jianmin¹^,²^,³, Wang Qian¹^,²^,³, Chen Xi¹^,²^,³, Fang Longxiang¹^,²^,³, Qiu Liping¹^,²^,³, Chen Jiazhang¹^,²^,³()

¹Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences, Wuxi Jiangsu 214081
²Laboratory of Quality & Safety Risk Assessment for Aquatic Products on Environmental Factors (Wuxi),Ministry of Agriculture and Rural Affairs, Wuxi Jiangsu 214081
³Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture and Rural Affairs, Beijing 100000

Received:2020-11-28 Revised:2020-12-31 Online:2021-10-05 Published:2021-10-28
Contact: Chen Jiazhang

摘要/Abstract

摘要：

为研究养殖池塘底泥环境中农药氰戊菊酯（fenvalerate,简称FV）及其异构体（分别用FV1、FV2表示反式异构体,FV3和FV4表示顺式异构体）的消除动态规律,本研究通过室内模拟培育的方式观察底泥样本中FV及其手性异构体在浓度水平和异构体差异上的消除变化规律。研究发现,FV在底泥环境中的降解过程符合一级降解动力学方程。不同暴露浓度条件下,FV及其手性异构体的降解半衰期均无显著性差异,FV在环境中的半衰期范围是19.47~38.73天。不同手性异构体在底泥环境中的半衰期存在差异,FV1的降解半衰期显著高于其他异构体,FV3显著高于FV2和FV4。FV在底泥环境中存在α-C位置异构的转化现象,当转化进行3周后,转化速率变慢,转化产物变化开始不断减少。研究认为,FV在底泥中的蓄积周期较长,应尽量避免FV在底泥环境中的直接残留和暴露。此外,为安全进行渔业生产和有效进行环境生态风险评价,在底泥FV残留的检测或去除研究中应区分其不同的手性异构体。

关键词: 氰戊菊酯, 底泥环境, 手性异构体, 半衰期, 转化

Abstract:

To study the dynamic degradation regulation of fenvalerate (FV) and its chiral isomers (trans-isomer: FV1 and FV2; cis-isomer: FV3 and FV4) in aquaculture sediment, the degradation regulation of FV and chiral isomers were studied through laboratory simulation. The degradation of FV in sediment followed the first-order degradation kinetics. The half-lives of FV in the sediment ranged from 19.47 to 38.73 days. There was no significant difference in the degradation half-lives of FV. Nevertheless, the half-lives of different chiral isomers in the sediment were different. The degradation half-life of FV1 was substantially longer than those of other isomers, and the degradation half-life of FV3 was significantly longer than those of FV2 and FV4. FV underwent α-C isomerization in the sediment. When the conversion was carried out for 21 d, the conversion rate was slowing down and the changes in conversion products decreased. Because FV had a long accumulation period in sediments, the direct exposure of sediment to FV should be minimized. To effectively conduct environmental and ecological risk assessments of FV, the different chiral isomers should be distinguished in sediment FV residues.

Key words: fenvalerate, sediment environment, chiral isomer, half-life, conversion

中图分类号:

宋超, 邹剑敏, 汪倩, 陈曦, 方龙香, 裘丽萍, 陈家长. 手性差异对水产养殖沉积物环境中农药氰戊菊酯降解的影响[J]. 中国农学通报, 2021, 37(28): 153-158.

Song Chao, Zou Jianmin, Wang Qian, Chen Xi, Fang Longxiang, Qiu Liping, Chen Jiazhang. Influence of Chiral Difference on the Degradation of Fenvalerate in Aquaculture Sediment Environment[J]. Chinese Agricultural Science Bulletin, 2021, 37(28): 153-158.

图/表 9

参考文献 28

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分组		浓度/(μg/L)	药品
1	TL	20	FV（4类异构体混合）
2	AL		FV1 (αR,2S- FV)
3	BL		FV2 (αS,2R- FV)
4	CL		FV3 (αR,2R- FV)
5	DL		FV4 (αS,2S- FV)
6	TH	200	FV（4类异构体混合）
7	AH		FV1 (αR,2S- FV)
8	BH		FV2 (αS,2R- FV)
9	CH		FV3 (αR,2R- FV)
10	DH		FV4 (αS,2S- FV)

分组		浓度/(μg/L)	药品
1	TL	20	FV（4类异构体混合）
2	AL		FV1 (αR,2S- FV)
3	BL		FV2 (αS,2R- FV)
4	CL		FV3 (αR,2R- FV)
5	DL		FV4 (αS,2S- FV)
6	TH	200	FV（4类异构体混合）
7	AH		FV1 (αR,2S- FV)
8	BH		FV2 (αS,2R- FV)
9	CH		FV3 (αR,2R- FV)
10	DH		FV4 (αS,2S- FV)

出峰顺序	药品	保留时间/min	面积	面积比/%
1	FV1	11.074	7547326	25.13
2	FV2	15.48	8490729	28.27
3	FV3	17.34	6582565	21.92
4	FV4	21.225	7416057	24.69

出峰顺序	药品	保留时间/min	面积	面积比/%
1	FV1	11.074	7547326	25.13
2	FV2	15.48	8490729	28.27
3	FV3	17.34	6582565	21.92
4	FV4	21.225	7416057	24.69

试验组	降解动力学方程	相关性系数	降解速率常数
FV-低	C_t=37.659e^-0.024^t	0.916	0.024±0.001
FV1-低	C_t=41.185e^-0.018^t	0.979	0.018±0.001
FV2-低	C_t=40.199e^-0.036^t	0.971	0.036±0.002
FV3-低	C_t=38.406e^-0.022^t	0.936	0.022±0.001
FV4-低	C_t=38.458e^-0.029^t	0.986	0.028±0.001
FV-高	C_t=362.090e^-0.026^t	0.969	0.026±0.002
FV1-高	C_t=390.700e^-0.02^t	0.965	0.019±0.002
FV2-高	C_t=365.680e^-0.035^t	0.991	0.036±0.001
FV3-高	C_t=369.040e^-0.022^t	0.927	0.022±0.001
FV4-高	C_t=362.780e^-0.029^t	0.957	0.030±0.004

手性差异对水产养殖沉积物环境中农药氰戊菊酯降解的影响

Influence of Chiral Difference on the Degradation of Fenvalerate in Aquaculture Sediment Environment

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