{"title":"The Behavior of Terbuthylazine, Tebuconazole, and Alachlor during Denitrification Process.","authors":"Kristína Pániková, Zuzana Bílková, Jitka Malá","doi":"10.3390/jox13040036","DOIUrl":null,"url":null,"abstract":"<p><p>Pesticide compounds can influence denitrification processes in groundwater in many ways. This study observed behavior of three selected pesticides under denitrifying conditions. Alachlor, terbuthylazine, and tebuconazole, in a concentration of 0.1 mL L<sup>-1</sup>, were examined using two laboratory denitrifications assays: a \"short\" 7-day and a \"long\" 28-day test. During these tests, removal of pesticides via adsorption and biotic decomposition, as well as the efficiency of nitrate removal in the presence of the pesticides, were measured. No considerable inhibition of the denitrification process was observed for any of the pesticides. On the contrary, significant stimulation was observed after 21 days for alachlor (49%) and after seven days for terbuthylazine (40%) and tebuconazole (36%). Adsorption was in progress only during the first seven days in the case of all tested pesticides and increased only negligibly afterwards. Immediate adsorption of terbuthylazine was probably influenced by the mercuric chloride inhibitor. A biotic loss of 4% was measured only in the case of alachlor.</p>","PeriodicalId":42356,"journal":{"name":"Journal of Xenobiotics","volume":"13 4","pages":"560-571"},"PeriodicalIF":6.8000,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10594447/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Xenobiotics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/jox13040036","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"TOXICOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Pesticide compounds can influence denitrification processes in groundwater in many ways. This study observed behavior of three selected pesticides under denitrifying conditions. Alachlor, terbuthylazine, and tebuconazole, in a concentration of 0.1 mL L-1, were examined using two laboratory denitrifications assays: a "short" 7-day and a "long" 28-day test. During these tests, removal of pesticides via adsorption and biotic decomposition, as well as the efficiency of nitrate removal in the presence of the pesticides, were measured. No considerable inhibition of the denitrification process was observed for any of the pesticides. On the contrary, significant stimulation was observed after 21 days for alachlor (49%) and after seven days for terbuthylazine (40%) and tebuconazole (36%). Adsorption was in progress only during the first seven days in the case of all tested pesticides and increased only negligibly afterwards. Immediate adsorption of terbuthylazine was probably influenced by the mercuric chloride inhibitor. A biotic loss of 4% was measured only in the case of alachlor.
农药化合物可以通过多种方式影响地下水中的反硝化过程。本研究观察了三种农药在反硝化条件下的行为。使用两种实验室反硝化试验：“短”7天试验和“长”28天试验，对浓度为0.1 mL L-1的甲草胺、terbuthylazine和戊唑醇进行了检测。在这些测试过程中，通过吸附和生物分解来去除农药，以及在农药存在的情况下去除硝酸盐的效率。没有观察到任何杀虫剂对反硝化过程有明显的抑制作用。相反，甲草胺（49%）在21天后观察到显著刺激，terbuthylazine（40%）和戊唑醇（36%）在7天后观察到明显刺激。在所有测试农药的情况下，吸附仅在前七天进行，之后的增加幅度可忽略不计。氯化汞抑制剂可能影响了terbuthylazine的即时吸附。仅在甲草胺的情况下测得4%的生物损失。
期刊介绍：
The Journal of Xenobiotics publishes original studies concerning the beneficial (pharmacology) and detrimental effects (toxicology) of xenobiotics in all organisms. A xenobiotic (“stranger to life”) is defined as a chemical that is not usually found at significant concentrations or expected to reside for long periods in organisms. In addition to man-made chemicals, natural products could also be of interest if they have potent biological properties, special medicinal properties or that a given organism is at risk of exposure in the environment. Topics dealing with abiotic- and biotic-based transformations in various media (xenobiochemistry) and environmental toxicology are also of interest. Areas of interests include the identification of key physical and chemical properties of molecules that predict biological effects and persistence in the environment; the molecular mode of action of xenobiotics; biochemical and physiological interactions leading to change in organism health; pathophysiological interactions of natural and synthetic chemicals; development of biochemical indicators including new “-omics” approaches to identify biomarkers of exposure or effects for xenobiotics.
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