• 责任者：Xie Yue (Department of Environmental Engineering ; College of Resources and Environmental Sciences ; Nanjing Agricultural University ; Nanjing 210095 ; China) ; Zhou Lixiang
• 刊名：Earth Science Frontiers
• 出版年：2011
• 卷期：18(5)
• 关键词：生物成矿作用 ; biomineralization ; 矿物材料 ; mineral materials
• 页码：p.310-318
• 图表：5 illus., 19 refs.
• 分类号：1000
• issnNo：ISSN1005-2321
• isbnNo：CN11-3370/P

Schwertmannites are secondary minerals widespread in acid mine drainages, and their development and transformations are controlled by environmental factors such as temperature, pH, and co-existing ions. In this study, the effects of temperature and ion concentration on the stability and transformation of biogenic and As-containing schwertmannites were investigated. The results showed that the increase of aging temperature favored mineral phase transformations (MPT): for schwertmannites with and without As incubated for 15 weeks, MPT did not take place at 4 ℃, but partially occurred at 40 ℃. In addition, the change of potassium ion concentration resulted in different aging products of schwertmannites: for the biogenic schwertmannites incubated for 15 weeks, the major aging products were goethite and jarosite/goethite at potassium ion concentrations of 0.01 mM and 100 mM, respectively; for the As(Ⅲ)-containing schwertmannites incubated for 15 weeks,