First report on organochlorine pesticides in water in a highly productive agro-industrial basin of the Central Valley, Chile
First report on organochlorine pesticides in water in a highly productive agro-industrial basin of the Central Valley, Chile
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DOI：
10.1016/j.chemosphere.2016.12.125
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发表时间：
2017-05-01
期刊：
影响因子：
8.8
通讯作者：
Grimalt, Joan O.
中科院分区：
文献类型：
--
作者：
Montory, Monica;Ferrer, Javier;Grimalt, Joan O.
努布尔河流经智利中部地区的农业区，那里种植着不同类型的水果。这项研究的目的是确定卢布河表层水中有机氯农药(OCPs)的水平和来源。在2013年和2014年的干旱(春季-夏季)和潮湿(秋季-冬季)期间，在10个采样点采集了地表水样本，并对19种有机氯农药进行了分析。结果表明，表层水中有机氯农药的总含量在0.12~26.28 ng/I之间，其中硫丹和林丹是主要的有机氯农药。有机氯农药浓度在枯水期达到最大值，而在丰水期浓度显著降低。这表明，有机氯农药的模式在过去10年中发生了变化，因为这项研究发现，滴滴涕和代谢物的浓度很低，但甲硫丹的浓度显著增加。鉴于有机氯农药已在多年前退出农业用途，它们的存在表明它们可能仍在秘密使用。在这项研究中发现硫丹和林丹的浓度很高，从而得出结论，化学休耕措施有助于径流进入河流和地表水进入地下水。由于之前没有研究测量智利农业流域的有机氯化合物水平，这项研究对了解智利地表水中存在的有机氯污染物做出了重要贡献。(C)爱思唯尔有限公司出版的2016年。
The Nuble River flows through an agricultural area in the central zone of Chile in which different types of fruits are grown. The objective of this study was to identify the levels and source of organochlorine pesticides (OCPs) in the surface waters of the Ruble River. Surface water samples were collected at 10 sampling points and analyzed for 19 organochlorine pesticides during the dry (spring-summer) and wet (autumn-winter) periods of 2013 and 2014. The results revealed that concentrations of total OCPs in surface waters ranged from 0.12 to 26.28 ng/I. Endosulfan and lindane were the main OCPs in the water. The maximum OCP levels were found in the dry period, while significantly lower concentrations were recorded in the wet period. This indicates that patterns of OCPs have varied in the last 10 years as this study found low concentrations of DDT and metabolites but significantly increased concentrations of alpha-cendosulfan. Given the fact that OCPs were withdrawn from agricultural used many years ago, their presence indicates that they may be still in use clandestinely. Findings of significant concentrations of endosulfan and lindane in this study lead to the conclusion that the chemical fallow practices contribute to runoff into the river and surface water infiltration into groundwater. Because no studies have previously measured OCP levels in agricultural basins in Chile, this study is an important contribution to the knowledge of organochlorine contaminants present in surface water in Chile. (C) 2016 Published by Elsevier Ltd.