Analysis of metolachlor ethane sulfonic acid (MESA) chirality in groundwater: A tool for dating groundwater movement in agricultural settings
详细信息 查看全文
- 作者：Clifford P. Ricea ; clifford.rice@ars.usda.gov" class="auth_mail" title="E-mail the corresponding author ; Gregory W. McCartyb ; Krystyna Bialek-Kalinskia ; Kara Zabetakisc ; Alba Torrentsc ; Cathleen J. Hapemanb
- 关键词：Metolachlor ethane sulfonic acid ; Groundwater dating ; S-metolachlor ; Chiral separation ; Stereoisomer fraction
- 刊名：Science of the Total Environment
- 出版年：2016
- 出版时间：1 August 2016
- 年：2016
- 卷：560-561
- 期：Complete
- 页码：36-43
- 全文大小：850 K
文摘
- •
A groundwater dating tool is offered that can model baseflow stream loading of nitrogen.
- •
Metolachlor readily degrades to MESA in soil without changing its S and R enantiomeric ratios.
- •
The high solubility and persistence of MESA makes it good for tracing its groundwater transport.
- •
Chiral analyses of MESA in a buffer stream gave a time lag for the switch from rac to S-metolachlor.
- •
By modeling the decay in rac-MESA a groundwater flushing time of 3.8 years was estimated