کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5749142 1619146 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using column experiments to examine transport of As and other trace elements released from poultry litter: Implications for trace element mobility in agricultural watersheds
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Using column experiments to examine transport of As and other trace elements released from poultry litter: Implications for trace element mobility in agricultural watersheds
چکیده انگلیسی


- Column experiments examined fate of trace elements derived from poultry litter leachate in soils from Delaware, USA.
- Influent solutions included poultry litter leachate and simulated solution without DOC.
- Results showed increased mobility of litter-derived As, Cu, Zn and P in solution in the presence of DOC.
- Mass balance showed all of Cu mass remained in solution but most (60-70%) of the Zn, As and P mass was associated with soil.
- Study results show that DOC, in combination with adsorption, influences mobility of litter-derived elements.

Trace elements are added to poultry feed to control infection and improve weight gain. However, the fate of these trace elements in poultry litter is poorly understood. Because poultry litter is applied as fertilizer in many agricultural regions, evaluation of the environmental processes that influence the mobility of litter-derived trace elements is critical for predicting if trace elements are retained in soil or released to water. This study examined the effect of dissolved organic carbon (DOC) in poultry litter leachate on the fate and transport of litter-derived elements (As, Cu, P and Zn) using laboratory column experiments with soil collected from the Delmarva Peninsula (Mid-Atlantic, USA), a region of intense poultry production. Results of the experiments showed that DOC enhanced the mobility of all of the studied elements. However, despite the increased mobility, 60-70% of Zn, As and P mass was retained within the soil. In contrast, almost all of the Cu was mobilized in the litter leachate experiments, with very little retention in soil. Overall, our results demonstrate that the mobility of As, Cu, Zn and P in soils which receive poultry litter application is strongly influenced by both litter leachate composition, specifically organic acids, and adsorption to soil. Results have implications for understanding fate and transport of trace elements released from litter application to soil water and groundwater, which can affect both human health and the environment.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 227, August 2017, Pages 223-233
نویسندگان
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