不同类型锰矿废渣浸提条件下重金属释放特征及其对植物种苗生长的影响

通过对贵州省遵义市长沟锰矿区不同类型废渣（矿井废石、冶炼渣、电解锰渣、新尾矿、旧尾矿）进行调查与采样分析，探讨浸提条件下重金属的释放特征及其对种苗生长的影响。结果表明：不同类型废渣浸出液中主要污染物是Mn、Zn，浓度范围分别为0．1172～82．99mg／L、0．2232～23．85mg／L，其次为Cd、Hg；电解锰渣和新尾矿属于危险废物。电解锰渣浸出液对幼苗的根长、芽长以及发芽率、发芽势有显著的抑制作用；物种耐性由强到弱的大小顺序为油菜〉黑麦草〉紫花苜蓿。

Release Characteristics of Heavy Metals of Different Manganese Slags under the Conditions of Release and its Effect on Plant Growth of Seedlings

Through the survey and sampling of different types of manganese waste （ Mine waste rock, waste slags, electrolytic manganese slag, new tailings, old tailings）, release characteristics of heavy metals and its effects on seedling growth under the conditions of extraction is discussed. The results indicate that major pollutants in the leachate are Mn and Zn, and the concentration ranges are 0. 1172 -82. 99mg/L and 0. 2232 -23. 85mg/L, which was followed by Cd and Hg. Actually, electrolytic manganese slag and new tailings are hazardous wastes. Seedling root length and germination rate of bud germination are significantly inhibited by manganese slag leachate, species patience from strong to weak in the order of rape 〉 ryegrass 〉 alfalfa is disclosed.