کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6967996 | 1453004 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of soil acidification on the toxicity of organophosphorus pesticide on Eisenia fetida and its mechanism
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کلمات کلیدی
PLSPODSASCATOPs - OP هاAChE - آهیAcetylcholinesterase - استیل کولین استرازSoil acidification - اسیدی شدن خاکQSAR - بزرگسال Quantitative Structure Activity Relationship - رابطه فعالیت ساختاری کمیPartial least squares regression - رگرسیون حداقل مربعات جزئیSOD - سدOrganophosphorus pesticides - سموم ارگانوفسفرهOrganophosphorus pesticide - سموم دفع آفات فسفرToxicity - سمی بودنSulfonamides - سولفونامیدSuperoxide dismutase - سوکسوکس دیسموتازPeroxidase - پراکسیدازCatalase - کاتالازEarthworm - کرم خاکی، کرمشک
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Organophosphorus pesticides (OPs) have been widely used to control agricultural insects. Soil acidification is a major problem in soil of intensive agricultural systems, especially in red soil with a low pH buffer capacity. However, the effects of soil acidification on the toxicity of pesticides are still unclear. In the present study, the toxicity of three OPs on E. fetida was determined at individual (14-day lethal test) and biochemical levels (antioxidative defence enzymes) by using acidified soils (pHâ¯=â¯5.5, 4.3 and 3.1). The results showed that the toxicity of tested OPs was slightly increased with the decrease of soil pH. To interpret the phenomena, an optimum Quantitative Structure Activity Relationship (QSAR) model was developed based on the toxicity mechanism and the partial least squares regression (PLS) method. The model indicated bioavailability and toxicodynamics are key factors of soil acidification affecting the toxicity of the OPs. Further results revealed the bioavailability of the OPs was strongly related to their hydrolysis and biodegradation character, whereas the effects of soil acidification on toxicodynamics were mainly caused by the interaction between the acetylcholinesterase (AchE) and the OPs. Results will increase understanding of the effects of soil acidification on the toxicity of pesticides and its mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 359, 5 October 2018, Pages 365-372
Journal: Journal of Hazardous Materials - Volume 359, 5 October 2018, Pages 365-372
نویسندگان
Xiaoming Zou, Xiaoyu Xiao, Hanfeng Zhou, Feng Chen, Jianjun Zeng, Wenbiao Wang, Guangping Feng, Xiangfeng Huang,