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不同洗涤蜂窝煤灰渣对铅冶炼污染石灰性土壤的修复研究

Keywords: 蜂窝煤灰渣,洗涤,,盐酸,铅冶炼,石灰性土壤,修复

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Abstract:

为了探讨不同洗涤蜂窝煤灰渣对铅冶炼污染石灰性土壤中铅和镉的稳定效果,在铅冶炼污染石灰性土壤(Pb和Cd含量分别为2337、21.4mg·kg-1)上分别施1%、2%和4%用量的原灰渣、水洗灰渣或酸洗灰渣,培养60d后,测定土壤DTPA-Cd、DTPA-Pb、pH、电导率(EC)和Olsen-P。结果表明:对于原灰渣,土壤镉有效性随灰渣用量的增加而降低,在4%的用量下,土壤DTPA-Cd含量与对照相比下降13.1%(P0.05)。对于酸洗灰渣,土壤DTPA-Cd含量随用量的增加而升高,4%的用量时,DTPA-Cd含量与对照差异显著(P0.05)。除施用原灰渣可显著提高土壤pH(P0.05)。原灰渣在2%和4%、水洗灰渣在4%用量时,均能显著提高土壤E

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