Biogenic Iron Oxyhydrosulfate and Iron Oxyhydroxide Occurring in Acid Mine Drainage and Their Environmental Engineering Implicationsoft-com:office:office" />
详细信息
- 责任者：Zhou Lixiang (Department of Environmental Engineering ; College of Resources and Environmental Sciences ; Nanjing Agricultural University ; Nanjing 210095 ; China)
- 刊名：Earth Science Frontiers
- 出版年：2008
- 卷期：15(6)
- 关键词：铁矿物 ; iron minerals ; 废水 ; waste water ; 水处理 ; water treatment
- 页码：p.74-82
- 图表：72 refs.
- 分类号：1800
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Acid mine drainage (AMD) generated through the oxidation of pyrite facilitated by Acidithiobacillus ferrooxidans has a lower pH and contains relatively high contents of heavy metals as well as Fe and SO42-. Iron oxyhydrosulfate and iron oxyhydroxide, commonly found in acid mine drainage (AMD) and in waters polluted by AMD, play important roles in the attenuation or scavenging of toxic elements. These ferric iron precipitates include jarosite, schwertmannite, goethite, ferrihydrite, etc. In the light of the formation process of biogenic ferric iron oxyhydrosulfate in AMD and its role in scavenging of Fe, SO42- and toxic metals, the bio-genic minerals could be considered an effective adsorbent for arsenic removal of As-contaminated groundwater because biogenic ferric iron oxyhydrosulfate especially schwertmannite is of extreme high adsorption capacity for As (IID up to 120 mg/g.