中山大学学报（自然科学版）Issue(6)：73-77,5.
酸碱度和铁离子对毒砂生物氧化作用的影响研究
Effects of pH and Fe (Ⅱ)on Bio-oxidation of Arsenopyrite By Acidithiobacillus ferrooxidans
摘要
Abstract
Many studies focus on the oxidation of arsenopyrite which results in the formation of acid mine drainage (AMD)rich of As,but effects of pH and Fe2+on arsenopyrite bio-oxidation are rarely availa-ble .A strain of Acidithiobacillus ferrooxidans (A.f.)isolated from the AMD of Dabaoshan and a mineral arsenopyrite were used to study the bio-oxidation of arsenopyrite.Experiments were designed to compare the difference between abiotic oxidation and bio-oxidation of arsenopyrite in pH2.00,3.00 and 3.50 with or without additional Fe2+conditions in a period of 30 days.The concentrations of As ion,Fe2+and pH values during the experiments were determined The results showed the lower original pH value the higher concentration of As ion in the result solution of bio-oxidation without additional Fe2+.The concentration of As ion in the result solution of the original pH2.00 is about 15 times of that in the original pH3.50.A lower pH value can accelerate the bio-oxidation of arsenopyrite.The additional Fe2+can keep the pH val-ue of bio-oxidation solution in a condition of lower than 4.00,which promotes the bio-oxidation of the ar-senopyrite and concentration of As ion in the result solution.The results indicate that adding some alka-line substances in the acid mine drainage to increase its pH value can reduce its Fe2+concentration,de-crease the bio-oxidation rate of arsenopyrite and reduce the concentration of As ions.关键词
氧化亚铁硫杆菌/毒砂/氧化作用/酸性矿山废水Key words
Acidithiobacillus ferrooxidans/arsenopyrite/oxidation/acid main drainage分类
环境科学引用本文复制引用
陈炳辉,王智美,颜丽,王梦媛,李文..酸碱度和铁离子对毒砂生物氧化作用的影响研究[J].中山大学学报（自然科学版）,2014,(6):73-77,5.基金项目
国家自然科学基金资助项目 （）
