期刊论文

中文

农业环境科学学报

1672-2043

2012

31

5

920-925

湖南省科技厅科技计划项目（2010NK3020） 湖南省教育厅重点项目（10A031） 湖南省自然科学市州联合基金项目（11JJ9007）

本校为第一机构

铅锌尾矿砂重金属含量高,对环境危害大。为了减缓铅锌尾矿砂的重金属污染风险,采用室内培养实验方法,在铅锌尾矿砂中添加油菜秸秆、芒草秸秆、水稻秸秆、石灰和磷酸一铵等钝化剂,并通过DTPA及Tessier连续提取铅、锌、镉的化学形态,评价钝化剂对铅、锌、镉的移动性和生物有效性的影响。结果表明,油菜秸秆、芒草秸秆、水稻秸秆、石灰和磷酸一铵均显著地降低Cd的生物有效性及其迁移能力;磷酸一铵、油菜秸秆均能有效地降低尾矿砂中Pb的生物有效性及其迁移能力,尤其是磷酸一铵有极显著的效果;油菜秸秆、芒草秸秆、水稻秸秆和磷酸一铵均能有效地降低尾矿砂中Zn的生物有效性及其迁移能力。尾矿砂中DTPA...

The tailings collected from Xiangxi lead and zinc （Pb/Zn） mine, in west of Hunan Province, China, had high concentrations of Pb, Zn and Cd. In order to reduce the risk of Pb, Zn and Cd in lead-zinc tailing, passivators including rape offal, grass straw, rice straw, lime and ammonium phosphate were added into the railings after 30 days incubation. DTPA method and Tessier sequential extraction procedures for different chemical fractions of Pb, Zn, and Cd, were employed to evaluate the effects of these passivators on the mobility and bioavailabi...