Purification effect of dissolved pollutants in mine water treatment and the improvement measures

SHI Yuanteng; ZHU Lei; BING Zhe; XIANG Yi; LI Ruihua; WANG Wendong

doi:10.11799/ce202505014

Abstract：In view of the increasingly stringent discharge requirements of coal mine water,we systematically evaluated the removal effect of traditional mine water purification technology on dissolved pollutants by using the purification process of a coal mine in southwest Shanxi.The results showed that the mine water can not only effectively remove high-concentration particulate matter,but also remove dissolved pollution components such as organic matter,total phosphorus,fluoride,sulfide and total mercury to varying degrees.With the enhanced purification measures of activated carbon adsorption and microfiltration,it can be ensured that all indicators for dissolved pollutants except total nitrogen and fluoride can stably meet the Class III standard of surface water,under the large fluctuations in the concentration of pollutants in the raw mine water.After further studies it was found that,the purification and removal of dissolved pollutants was realized by the adsorption of particulate matter and activated carbon in mine water and the mechanical retention of microfiltration membranes.In order to improve the purification effect of total nitrogen and fluoride,it was suggested to add denitrification nitrogen removal unit and fluoride adsorption unit in current process.The results can provide theoretical support for the selection and upgrading of coal mine water purification process.