中文摘要：

在常压、pH=1．5、铁砷摩尔比1．5、不同温度、臭葱石晶种存在的条件下，考察了嗜酸氧化亚铁硫杆菌（Acidthiobacillusferrooxidans，At.f）、中度嗜热西伯利亚硫杆菌（Sulfobacillussibiricu，S.s）和嗜酸热古菌（MetallosphaeraAr，M.A）菌种对溶液中砷沉淀及臭葱石晶体形成的影响．结果表明，在70℃，M．A菌种及臭葱石晶种存在的条件下，溶液中砷去除率达87％，且能形成结晶效果好、粒径大的长斜形臭葱石晶体．

英文摘要：

Under the conditions of atmospheric pressure, initial pH 1.5, molar ratio of Fe to As 1.5, different temperatures （35, 50, 70 ℃）, and existence of scorodite seeds, the influences of iron oxidation bacteria, Acidithiobacillus ferrooxidans, Sulfobacillus sibiricu and Metallosphaera Ar （M.A）, on precipitation of arsenic in Fe（II） solution containing As（V） and formation of crystalline scorodite were investigated. The results show that higher temperature, bacteria and scorodite seeds can effectively promote the removal and precipitation of arsenic in the solution. Especially at 70 ℃ with M.A and in existence of scorodite seeds, the removal rate of arsenic reaches 87%, and the precipitate scorodite can form as fine and large rhomboid crystals.