Effect of chemical nitrogen fertilizer application on the release of arsenic from sediment to groundwater in Bangladesh
Effect of chemical nitrogen fertilizer application on the release of arsenic from sediment to groundwater in Bangladesh
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DOI：
10.1016/j.proenv.2011.03.034
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Md. Shamim Uddin;K. Kurosawa
中科院分区：
文献类型：
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作者：
Md. Shamim Uddin;K. Kurosawa
研究了化学氮肥对地下水砷污染的影响。泥炭沉积物中砷和氮含量较高。在还原条件下，地下水中氨氮浓度较高时，地下水中砷含量较高。从δ-15N分析可知，泥炭沉积物和地下水中氮素的来源可能是化学氮肥。因此，我们推测，化肥创造的高氮环境通过提高微生物活性导致地下水的还原条件，还原条件促进了泥炭沉积物中砷向地下水的释放。
The effect of chemical nitrogen fertilizer application on groundwater arsenic pollution was examined. Arsenic and N concentrations in peat sediment were high. In the groundwater, a high arsenic concentration was observed under a high ammonium-N concentration with reducing conditions. From δ15N analysis, the source of N in peat sediment and groundwater was possibly chemical N fertilizer. Thus, we assumed that a high N environment created by the fertilizer led the groundwater to reducing conditions through the enhancement of microbial activity, and the reducing condition promoted the arsenic release from peat sediment to the groundwater.