贵州六枝煤矸石复垦土壤及农作物中汞分布规律测试研究

Distribution of Mercury in the Soils from Weathered Coal Mine Spoils and Crops in Liuzhi, Gnizhou province

使用Lumex测汞仪，测定了贵州六枝煤矿不同风化年限的煤矸石风化土壤及农作物中总Ha含量，并对此矿区煤矸石风化土壤一农作物系统中汞的分布规律进行了研究。结果表明，煤矸石及受煤矸石淋滤液影响土壤样中汞含量范围在0．045～0．474mg·kg^-1之间，风化时间短的煤矸石汞含量比对照点高，且风化年限越长，煤矸石中的Hg含量越低。煤矸石及风化土壤样中有机质和总汞含量之间存在显著的相关关系（r=0．43，P〈0．05）。农作物中总汞含量在0．03—28．589μg·kg^-1（湿重）之间，大部分植物中各部位总汞含量的关系均为叶〉根〉茎。

Lumex analytical equipment is used to measure total mercury in coal mine spoils and crops in Liuzhi, Guizhou province, and mercury distribution in Hg in the soils - crops system from weathered coal mine spoils were studied and discussed in detail. The result showed that total mercury concentrations in the coal mine spoils and soils which is influenced by coal gangue leachate changed from 0.045 to 0. 474mg·kg^-1, and total mercury concentrations in the coal mine spoils in a short weathering time is higher than those in control sites. Mercury concentrations in coal mine spoils decreased with the extension of weathering total Hg tions of time. and correlated positively with the organic concentrations in the crops changed from 0.03 to 28. 589μg·kg^-1 （ wet weight）. The distribu-tions of total Hg concentrations in the each part of most crops showed leaf 〉 root 〉 stem.