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有机酸对污染土壤中铜和镉的浸提效果

Keywords: 土壤,浸提条件,,,柠檬酸,酒石酸,EDTA

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Abstract:

以采自湖北省大冶矿区长乐山的4种土壤为供试材料,研究了柠檬酸、酒石酸和EDTA在不同浓度、浸提时间和加入电解质等因素影响下对土壤中铜和镉的浸提效果。结果表明,有机酸对土壤中铜和镉的浸提量随有机酸浓度的增加而增加,但增幅与有机酸的种类有关。土壤中铜浸提30min,镉浸提1h可接近平衡。在柠檬酸处理中,加入电解质对铜和镉的浸提起抑制作用。

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