Demonstrating an approach for including pesticide use in life-cycle assessment: Estimating human and ecosystem toxicity of pesticide use in Midwest corn farming

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• 作者：Xiaobo Xue ; Troy R. Hawkins…
• 关键词：Corn ; Ecotoxicity ; Human health ; Life ; cycle assessment ; Midwest ; Pesticide
• 刊名：The International Journal of Life Cycle Assessment
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：20
• 期：8
• 页码：1117-1126
• 全文大小：517 KB
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• 作者单位：Xiaobo Xue (1)
  Troy R. Hawkins (2) (3)
  Wesley W. Ingwersen (2)
  Raymond L. Smith (2)
  
  1. Oak Ridge Institute for Science and Education (ORISE), Oak-Ridge, TN, 37830, USA
  2. Sustainable Technology Division, National Risk Management Research Laboratory, U.S. Environmental Protection Agency, Cincinnati, OH, 45268, USA
  3. Business Intelligence, Enviance, Carlsbad, California, 92008, USA
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Environmental Economics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7502

文摘

Purpose This study demonstrates an approach to assess human health and ecotoxicity impacts of pesticide use by including multiple environmental pathways and various exposure routes using the case of corn grown for bio-based fuel or chemical production in US Midwestern states. Methods Multiple tools including an environmental emission model (PestLCI), an impact analysis tool (USEtox), and additional databases were utilized to estimate the state-specific pesticide releases and their associated spatially explicit toxicity in Midwest states. Results and discussion On average, chlorpyrifos and acetochlor exhibit the highest human toxicity potential (HTP) and the highest ecotoxicity potential (ETP) impact scores, respectively. The different ranking orders of pesticides for human health and ecosystem toxicity suggest that there are tradeoffs between these two impact categories. While the air pathway can account for 10-7?% of HTP, the water pathway is the dominating contributor for ETP for most of the pesticides. Moreover, while chlorpyrifos, fipronil, 2,4-d-2-ethylhexyl ester, simazine, and glufosinate–ammonium together account for more than 80?% of HTP per kilogram harvested corn, acetochlor is the dominating contributor in ETP due to its high ecotoxicity characterization factor and high application rates for corn. In addition, the spatial variation analysis shows that South Dakota and Missouri are the states that have the highest HTP (per kg corn), while Kansas exhibits the highest ETP (per kg corn) among Midwest states. Conclusions HTP and ETP exhibit large variations across various pesticides, US states, and application times. While chemical properties and toxicity characteristics can result in up to five orders of magnitude of variation in HTP and ETP, the rest of the parameters (such as application times, soil properties, and climate conditions) can affect the results by up to two orders of magnitude.