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首页> 外文期刊>Land Degradation and Development >Distribution of cadmium, copper, lead, and zinc in mudflat salt-soils amended with sewage sludge
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Distribution of cadmium, copper, lead, and zinc in mudflat salt-soils amended with sewage sludge

机译：用污水污泥修正泥浆盐土中镉，铜，铅和锌的分布

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摘要

Applying sewage sludge to mudflat salt-soils can rapidly improve soil physicochemical properties and enhance pollution potential. Nevertheless, the heavy metal distribution in leachate and mudflat salt-soils with sludge amendment remains unclear. The present work was aimed primarily at investigating the fates of Cd, Cu, Pb, and Zn in mudflat salt-soils amended by sludge. A leaching column experiment in a greenhouse was conducted to analyze the leaching losses of the metals in the sludge-amended soils and to evaluate the uptake of these metals by maize (Zea mays L.) seedlings, using a mudflat salt-soil amended with 0, 30, 75, 150, and 300g sludge per kg soil. The results indicated that metal concentrations were significantly correlated negatively with pH and positively with dissolved organic carbon concentration in leachate of sludge-amended soils. The sewage sludge application enhanced metal uptake without inhibiting the growth of maize. The sludge treatments enhanced metal concentrations in top layer (0-20cm) of soil in the leaching column but did not change metal concentrations in soil layer of 20-40cm (p&.05). Immobile fraction of Pb and mobile fraction of Cd, Cu, and Zn increased with increasing rates of sludge addition. Long-term field studies are required for further evaluation of the impacts of recycling sludge on heavy metal behaviors including leaching, accumulation, and dynamic change of metal fractions in mudflat salt-soils.
机译：将污水污泥应用于泥浆盐土可以迅速改善土壤理化性质，增强污染潜力。然而，渗滤液中的重金属分布和泥浆盐土与污泥修正仍然尚不清楚。目前的作品主要针对污泥修正的泥浆盐土中Cd，Cu，Pb和Zn的粘性。进行温室中的浸出柱实验，以分析污泥修正的土壤中金属的浸出损失，并通过玉米（ZEA Mays L.）幼苗评估这些金属的摄取，使用0的泥浆盐土壤，每千克土壤30,75,150和300g污泥。结果表明，金属浓度与pH值显着与污泥修正的土壤渗滤液中的溶解有机碳浓度显着相关。污水污泥应用增强了金属摄取而不抑制玉米生长。污泥处理在浸出柱中的土壤中的顶层（0-20cm）的金属浓度增强，但在20-40cm的土壤层中没有改变金属浓度（P＆amp; .05）。 CD，Cu和Zn的Pb和移动级分的固定级分，随着污泥加入的增加而增加。需要长期的现场研究进一步评估回收污泥对重金属行为的影响，包括泥浆盐土中金属部分的浸出，积聚和动态变化。

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  • 来源
    《Land Degradation and Development》 |2018年第4期|共10页
  • 作者

    Bai Yanchao; Yan Yiyun; Zuo Wengang; Gu Chuanhui; Guan Yongxiang; Wang Xukui; Zhao Haitao; Shan Yuhua; Shao Hongbo; Feng Ke;

  • 作者单位

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Agr Yangzhou 225127 Jiangsu Peoples R China;

    Appalachian State Univ Dept Geol &

    Environm Sci Boone NC 28607 USA;

    Jiangsu Cultivated Land Qual &

    Agroenvironm Prote Nanjing 210036 Jiangsu Peoples R China;

    Jiangsu Cultivated Land Qual &

    Agroenvironm Prote Nanjing 210036 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

    Jiangsu Acad Agr Sci Salt Soil Agr Ctr Nanjing 210014 Jiangsu Peoples R China;

    Yangzhou Univ Coll Environm Sci &

    Engn Yangzhou 225127 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤学;
  • 关键词

    leaching; heavy metals; salt-soil; sewage sludge; soil amendment;

    机译：浸出;重金属;盐土;污水污泥;土壤修正案;

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