Enantioselective biodegradation and carbon isotope fractionation of myclobutanil in tea orchard soils

被引：0
|
作者：
Liu B. [1 ]
Zhang D. [1 ]
He L. [1 ]
Zhu Y. [1 ]
机构：
[1] College of Environmental and Resource Sciences, Zhejiang University, Hangzhou
来源：
Earth Science Frontiers | 2019年 / 26卷 / 06期
关键词：
Compound-specific isotope analysis(CSIA); Enantiomeric fractionation analysis(EFA); Enantioselective degradation; Isotope fractionation; Myclobutanil;
D O I：
10.13745/j.esf.sf.2019.2.11
中图分类号：
学科分类号：
摘要：
We studied the dissipation of chiral triazole fungicide myclobutanil in four tea orchard soils with different cultivating ages by enantiomeric fractionation analysis(EFA) and compound-specific isotope analysis(CSIA). The dissipation of myclobutanil in soils followed first order kinetics with half-lives ranging from 28.4 to 70.5 days. Enantioselective degradation occurred in all tea orchard soils where(+)-myclobutanil was preferentially degraded. The dissipation half-life and enantiomer fraction of myclobutanil were significantly lower in 50-year than in 100, 20, and 2-year tea orchard soils (P<0.05), while degradation half-life and enatioselectivity were significantly correlated with sand and silt contents (P<0.05), respectively. We used the logarithmic forms of the Rayleigh equation in evaluating the carbon isotope enrichment factors for various soils and established the biodegradation assessment model. The biodegradation rates of myclobutanil evaluated by both enantiomeric and isotopic fractionation analysis were consistent with the observed degradation rates. © 2019, Editorial Office of Earth Science Frontiers. All right reserved.
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页码：13 / 18
页数：5
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共 17 条
  • [1] Braun P.G., Mcrae K.B., Composition of a population of Venturia inaequalis resistant to myclobutanil, Canadian Journal of Plant Pathology, 14, 3, pp. 215-220, (1992)
  • [2] Vogel J.R., Majewski M.S., Capel P.D., Pesticides in rain in four agricultural watersheds in the United States, Journal of Environmental Quality, 37, 3, pp. 1101-1115, (2008)
  • [3] Wightwick A.M., Bui A.D., Zhang P., Et al., Environmental fate of fungicides in surface waters of a horticultural-production catchment in southeastern Australia, Archives of Environmental Contamination and Toxicology, 62, 3, pp. 380-390, (2012)
  • [4] Buerge I.J., Mueller M.D., Poiger T., The Chiral Herbicide Beflubutamid (Ⅱ): enantioselective Degradation and enantiomerization in soil, and formation/degradation of Chiral Metabolites, Environmental Science and Technology, 47, 13, pp. 6812-6818, (2013)
  • [5] Diao J., Lv C., Wang X., Et al., Influence of soil properties on the enantioselective dissipation of the herbicide lactofen in soils, Journal of Agricultural and Food Chemistry, 57, 13, pp. 5865-5871, (2009)
  • [6] Buerge I.J., Poiger T., Muller M.D., Et al., Influence of pH on the stereoselective degradation of the fungicides epoxiconazole and cyproconazole in soils, Environmental Science and Technology, 40, 17, pp. 5443-5450, (2006)
  • [7] Li Y., Dong F., Liu X., Et al., Enantioselectivity in tebuconazole and myclobutanil non-target toxicity and degradation in soils, Chemosphere, 122, pp. 145-153, (2015)
  • [8] Zhang D., Wu Y., Zhang X., Et al., Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils, Eurasian Journal of Soil Science, 6, 2, pp. 106-113, (2017)
  • [9] Milosevic N., Qiu S., Elsner M., Et al., Combined isotope and enantiomer analysis to assess the fate of phenoxy acids in a heterogeneous geologic setting at an old landfill, Water Research, 47, 2, pp. 637-649, (2013)
  • [10] Okuda T., Kumata H., Naraoka H., Et al., Origin of atmospheric polycyclic aromatic hydrocarbons (PAHs) in Chinese cities solved by compound-specific stable carbon isotopic analyses, Organic Geochemistry, 33, 12, pp. 1737-1745, (2002)
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