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Impact of Long-Term Atrazine Use on Groundwater Safety in Jilin Province, China

Journal of Integrative Agriculture 2013年第2期12卷 305-313页

作者： GENG Yue MA Jing JIA Ran XUE Li-qin TAO Chuan-jiang LI Chong-jiu MA Xiao-dong LIN Yan College of Science China Agricultural University Institute for the Control of Agrochemicals Ministry of Agriculture

The long-lasting application of representative herbicide atrazine （ATR） has given rise to the accumulation of its residues in the groundwater. To investigate the impact of long-term ATR use on groundwater safety, the residues of ATR and its metabolites, desethylatrazine （DEA）, deisopropylatrazine （DIA） and hydroxyatrazine （HA） were monitored in groundwater and top soil at the major corn growing region of Qian＇an and Gongzhuling in Jilin Province, China. The residues of the target compounds were analyzed by UPLC-MS/MS. The limits of detection （LODs） ofATR, DEA, DIA, and HA were 0.5, 0.5, 5, and 0.5 ng L-1 in groundwater and 0.33, 0.33, 3.3, and 0.33 μg kg-1 in soil. The target compounds were found in 94% of groundwater samples and 100% of soil samples. The compounds detected most frequently in groundwater were ATR （89%）, DEA （64%） and HA （17%）, whereas in soil were ATR （97%）, DEA （36%） and HA （97%）. DIA was not detected in any determined groundwater and soil sample. Average residues were 106.8 ng L-1 for ATR, 0.9 ng L-1 for DEA and 0.3 ng L-1 for HA in groundwater, whereas 11.1 μg kg-1 for ATR, 0.4 μg kg-1 for DEA and 7.8 μg kg-1 for HA in soil. ATR residues detected in groundwater samples were below standards for drinking water quality （GB5749-2006, 2 μg L-1）, while the total residues of ATR and its chloro-s-triazine metabolites （DEA and DIA） were below current WHO （World Health Organization） guideline value （GV, 0.1 mg L-1）. In addition, concentrations of HA in groundwater were determined below current WHO GV （0.2 mg L-1）. The results indicated that ATR is safe to be used in Jilin Province under the current application scheme. However, total residues of ATR and DEA were detected in nearly all wells, thus, it is necessary to pay attention on groundwater monitoring for ATR and its metabolites.

关键词： atrazine desethylatrazine deisopropylatrazine hydroxyatrazine groundwater soil UPLC-MS/MS

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Alleviation of Pesticide Residue in Surface Water

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Journal of Water Resource and Protection 2017年第5期9卷 523-535页

作者： Olubode Adeniyi Amy Hernandez Mark LeBlanc Joan M. King Marlene Janes Agricultural Chemistry Department Ag Center Louisiana State University Baton Rouge Louisiana USA Pesticide Unit Louisiana State Department of Agriculture and Forestry Baton Rouge Louisiana USA School of Nutrition and Food Science Ag Center Louisiana State University Baton Rouge Louisiana USA

Reduction of environmental pollution incurred from pesticide use is very important. Zeolite is a natural mineral capable of removing certain chemical contaminants from water. This study was carried out to test the effect of zeolite treatment on pesticide residue alleviation in surface water. Ten surface water samples were treated with natural zeolite by filtering through. An EPA method was used to extract pesticide residue from the water samples and the surfactant used to modify the net charge on the zeolite was hexadecyltrimethylammonium chloride (HDTMA-Cl). Gas chromatography-mass spectrometry was used to analyze water samples. Alleviation was achieved in all the 10 water samples that were filtered through zeolite. The highest removal of pesticides from water with zeolite included 100% of bifenthrin in sample CLC, atrazine in BPH, CDG and LBT;metolachlor in CLC, LBT, BCH, TRH2 and BPI;acetolachlor in BBH and BCH;azoxystrobin in BBH;desethylatrazine in BCH and BPI;metribuzin in BCH, TRH2 and BPI;and both clomazone and bromacil in sample BDC. A minimum reduction of 10.9% was found for metolachlor in sample BRH. Further reduction of pesticide residues up to 50% was recorded in the SMZ treatment as the concentrations of 4 out of 8 pesticide residues were reduced. This study confirms the potential of both the natural zeolite-Clinoptilolite, and SMZ of alleviating pesticide residues in water.

关键词： EPA (United States Environmental Protection Agency) Gas Chromatography Mass Spectrometry Zeolite Hexadecyltrimethylammonium Chloride (HDTMA-Cl) Surface-Modified-Zeolite (SMZ) Bifenthrin Metolachlor Metribuzin Acetolachlor Azoxystrobin desethylatrazine Clomazone Bromacil Atrazine Clinoptilolite Alleviation

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