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赤泥对污染土壤Pb、Zn化学形态和生物可给性的影响

Keywords: 土壤,Pb,Zn,赤泥,化学形态,生物可给性

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Abstract:

通过土壤培养实验,研究添加赤泥对污染土壤中Pb、Zn化学形态和生物可给性的影响。结果表明,不同赤泥用量处理均可显著降低土壤中HOAc提取态Pb、Zn含量。当赤泥用量为5%时,培养1、2和3个月后,HOAc提取态Pb含量分别比对照下降62.5%、65.3%和73.5%;HOAc提取态Zn含量分别比对照下降56.7%、65.8%和67.4%。培养3个月后,只有1%赤泥用量处理显著降低了土壤中生物可给性Pb含量,而不同用量赤泥处理均显著降低了土壤中生物可给性Zn含量。研究表明赤泥是一种钝化污染土壤中Pb、Zn的潜力添加剂。

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