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首页> 外文期刊>Journal of Residuals Science & Technology >Effect of Sewage Sludge on Mercury Accumulation in Soil and Corn
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Effect of Sewage Sludge on Mercury Accumulation in Soil and Corn

机译：污水污泥对土壤和玉米中汞累积的影响

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The objective of this study was to determine the effect of heavy sewage sludge application on concentration of mercury (Hg) in a calcareous soil (fine loamy, mixed thermic Typic Haplarigid) and corn (Zea mays). Sludge was applied at 25, 50 and 100 Mg ha-1 for five consecutive years. Sludge application significantly increased total Hg concentration in soil and in corn roots, stems and grains. At the end of the fifth year the average Hg concentrations in roots, stems, and grains were 91, 9, and 8 μg kg-1, respectively. Although, Hg uptake by corn did not exceed the US-EPA control levels of food and feed quality, using heavy sludge application may eventually lead to the build-up of metal concentrations which do no longer allow the production of safe food, despite the high potential of this calcareous soil to immobilize the metals.
机译：这项研究的目的是确定施用重度污泥对石灰性土壤（细壤土，混合热典型Typha Harigrigid）和玉米（Zea mays）中汞（Hg）浓度的影响。连续五年分别在25、50和100 Mg ha-1下施用污泥。污泥的施用显着增加了土壤以及玉米根，茎和谷物中的总汞含量。在第五年末，根，茎和谷物中的平均Hg浓度分别为91、9和8μgkg-1。尽管玉米吸收的汞未超过美国环保局控制的食品和饲料质量水平，但使用大量污泥可能最终导致金属浓度增加，尽管金属含量很高，但不再允许生产安全食品钙质土壤固定金属的潜力。

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