ACCUMULATION OF ZIRCONIUM BY MICROALGAE AND CYANOBACTERIA

被引：28

作者：

GARNHAM, GW ^{[1
]}

CODD, GA ^{[1
]}

GADD, GM ^{[1
]}

机构：

[1] UNIV DUNDEE, DEPT BIOL SCI, DUNDEE DD1 4HN, SCOTLAND

来源：

APPLIED MICROBIOLOGY AND BIOTECHNOLOGY | 1993年 / 39卷 / 4-5期

关键词：

D O I：

10.1007/BF00205072

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The accumulation of zirconium (Zr) as [Zr4(OH)8(H2O)16]8+ by cyanobacteria and microalgae has been characterized. In all the cyanobacterial and microalgal species examined, accumulation consisted of a single rapid energy-independent phase (''biosorption'') and no energy-dependent accumulation was observed. Biosorption of Zr was concentration-dependent, followed a Freundlich adsorption isotherm, and was dependent on pH, showing decreased accumulation with decreased pH. Prior treatment with Na+, K+, Cs+, Ca2+, Mg2+ and Sr2+ (added as chlorides) also decreased Zr accumulation by cyanobacteria and microalgae, probably a result of competition between Zr ions and other cations, including H+, for available binding sites on the cell walls. Zr desorption from microalgae and cyanobacteria was increased by increasing external cation concentrations or by decreasing the pH of the desorption agent.

引用

页码：666 / 672

页数：7

共 33 条

[1] SIMPLE CONDITIONS FOR GROWTH OF UNICELLULAR BLUE-GREEN ALGAE ON PLATES [J].