都柳江水体-沉积物间锑的迁移转化规律

Antimony Mobility In Water-sediment of Duliujiang River

锑(Sb)是近年来广泛受到关注的一种污染物,都柳江流域有较多的锑矿山分布,采集并分析了都柳江(贵州独山至广西富禄)水和沉积物样品,结果显示:河流的自净稀释作用使都柳江水体-沉积物中的Sb含量呈总体一致下降趋势,沉积物中Sb含量较高;沿途锑矿山溪水的加入显著增加了水体-沉积物中Sb的浓度。水体-沉积物中的Sb含量变化呈如下规律:上游至三都米英D10点,粘土矿物和铁氧化物的吸附作用较强,Sb从水体迁移到沉积物中;下游D7至采样终点,以粘土矿物的解吸作用为主,Sb从沉积物迁移到水体中,最终导致水体中Sb含量升高,进而对水生生态系统构成一定的威胁。

Antimony （Sb） is a pollutant that has attracted widespread attention in recent years. There are many antimony mines distributed along DuLiujiang River Valley, water and sediment samples were collected and analyzed along Duliujiang River （from Dushan in Guizhou to Fulu in Guangxi）, the results indicate concentrations of Sb in water-sediment showes a general declining trend along the river, and the Sb content is higher in the sediments ; streams flow into the river from antimony mines along significant increased Sb concentrations of water-sed- iment. Laws of Sb contents in water-sediment is as follows ： strong adsorption of Sb in clay minerals and iron oxides of sediments, from upstream to D10 sampling point Miying village in Sandu county, there Sb migrate from water to sediment; desorption of Sb in clay minerals of sediments, from D7 sampling point to the terminal sampling point, Sb migrate from sediment to water, leaded to high level of Sb exist in water, posing a threat to a- quatic ecosystems.