Research development of arsenic removal from drinking water

Based on introducing the sources and hazards of arsenic in drinking water, this article discusses the technology development of removing arsenic from drinking water, including: flocculation/precipitation, adsorption, ion exchange, membrane technique and bio -technology. Each technology has their advantages and disadvantages. Comparison analysis reveals that coagulation/precipitation and adsorption methods have been widely used. The development of ion exchange and membrane technology are limited owing to their higher environmental requirements. The most promising one is bio -technology for its environment friendliness. The development prospect of arsenic removal from drinking water in China is forecasted. Small -scaled arsenic removal devices applying adopting flocculation and adsorption technologies are in a prevailing position considering China’s national condition of imbalanced economic development. From a long-term perspective, ion exchange and membrane technologies have larger application prospects. Bio -technology will attract more attention and research thanks to its high performance and low cost from the view of environmental protection.