黄钾铁矾的生物合成与鉴定  

Biosynthesis and Characterization of Jarosite

作　　者：周顺桂[1] 周立祥[1] 黄焕忠[2] 

机构地区：[1]南京农业大学资源与环境学院,江苏南京210095 [2]香港浸会大学生物系

出　　处：《光谱学与光谱分析》2004年第9期1140-1143,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (2 0 1 770 1 6);国际科学基金 (IFS ;C/ 2 669 2 );江苏省自然科学基金 (BK2 0 0 1 0 72 )资助项目

摘　　要：利用氧化亚铁硫杆菌的生物催化氧化作用 ,在FeSO4 K2 SO4 H2 O体系中和常温常压条件下合成赭黄色的黄钾铁矾。借助SEM ,XRD ,FTIR ,ICP AES等方法对它的化学组成和结构进行了分析与表征。结果表明 ,Thiobacillusferrooxidans休止细胞可在 2天内将FeSO4 K2 SO4 H2 O体系中的Fe2 + 全部氧化为Fe3 + ,Fe3 + 在高浓度硫酸根、K+ 存在和酸性条件下水解生成赭黄色高铁沉淀 ,经鉴定为黄钾铁矾 ,其晶体粒径均匀 ,分散性好 。A yellow ochre-colored jarosite was synthesized by bacterial oxidation of ferrous ion by Thiobacillus ferrooxidans at 28 degreesC and I 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.

关 键 词：黄钾铁矾 生物合成 鉴定 化学组成 结构 氧化亚铁硫杆菌 赭黄色无机颜料 

分 类 号：TQ622.1[化学工程—精细化工]