Review on wastewater treatment of heavy metals and reutilization technique

In order to reduce the pollution caused by heavy mental waste water, various methods are extensively investigated, such as chemical precipitation, electrolysis, adsorption, ion-exchange, membrane filtration, biological technology and the improved technologies of them. In recent years, as the shortage of freshwater and resources of heavy metals, more attention is paid on the recycling of heavy mental and the reutilization of water by treating the heavy mental containing effluent. Finally, the development of heavy metal wastewater treatment technology is prospected.