[黄钾铁矾的生物合成与表征]

[Biosynthesis and characterization of jarosite].

作者信息

Zhou Shun-gui, Zhou Li-xiang, Wong Jonathan W C

机构信息

College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2004 Sep;24(9):1140-3.

PMID:15762545

Abstract

A yellow ochre-colored jarosite was synthesized by bacterial oxidation of ferrous ion by Thiobacillus ferrooxidans at 28 degrees C and 1 atm. The identification of the bacterially oxidized ion precipitate was carried by SEM, XRD, FTIR and chemical analysis. Results showed that resting T. ferrooxidans cells could completely oxidize ferrous ions to ferric ions in FeSO4-K2SO4-H2O system at pH 2.5. In the presence of suitable monovalent K+ and excess sulfate, the yellow precipitate was produced from bacterially oxidized iron solutions. The subsequent characterization showed that it was high-quality jarosite without by-product such as amorphous ferric hydroxysulfates.

摘要

通过氧化亚铁硫杆菌在28摄氏度和1个大气压下对亚铁离子进行细菌氧化，合成了一种黄色赭石色的黄钾铁矾。通过扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和化学分析对细菌氧化的离子沉淀物进行了鉴定。结果表明，在pH值为2.5的FeSO4-K2SO4-H2O体系中，静止的氧化亚铁硫杆菌细胞能够将亚铁离子完全氧化为铁离子。在合适的单价钾离子和过量硫酸盐存在的情况下，细菌氧化的铁溶液会产生黄色沉淀。随后的表征表明，它是高质量的黄钾铁矾，没有无定形羟基硫酸铁等副产物。