硫化钠处理含汞废水

To treat mercury-containing wastewater with sodium sulfide

为了消除汞污染，采用硫化钠沉淀含汞废水。研究结果表明，出水中汞的含量小于国家规定的排放标准（０．０５ｍｇ／Ｌ），沉渣体积小，且化学稳定性很好，易处置。此法具有工艺简单，操作方便，反应速度快，沉淀效率高，随废水中含汞浓度的高低投加不同量的硫化钠，根据废水量的大小，可连续处理和间歇处理，处理费用低等优点。该法可在中小型化工行业中推广应用。

The treatment process,which uses sodium sulfide to precipitate mercury-containing wastewater, has many advantages as follows:convenient operation, high reaction rate,high efficiency of precipitation, less than 0.05mg/L concentration of mercury in the wastewater output.continuous or intermittent-operation according to volume of wastewater to be treated,low treatment cost,small volume of the precipitates, good chemical stability and ease disposal.