Accumulation of zirconium by microalgae and cyanobacteria

Geoffrey W. Garnham; Geoffrey A. Codd; Geoffrey M. Gadd

doi:10.1007/BF00205072

Accumulation of zirconium by microalgae and cyanobacteria

Geoffrey W. Garnham, Geoffrey A. Codd, Geoffrey M. Gadd (Lead / Corresponding author)

University of Dundee

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

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⁺, Mg⁺ 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.

Original language	English
Pages (from-to)	666-672
Number of pages	7
Journal	Applied Microbiology and Biotechnology
Volume	39
Issue number	4-5
DOIs	https://doi.org/10.1007/BF00205072
Publication status	Published - Jul 1993

Keywords

Chloride
Cell Wall
Zirconium
Microalgae
Adsorption Isotherm

ASJC Scopus subject areas

Biotechnology
Applied Microbiology and Biotechnology

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10.1007/BF00205072

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title = "Accumulation of zirconium by microalgae and cyanobacteria",

abstract = "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+, Mg+ 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.",

keywords = "Chloride, Cell Wall, Zirconium, Microalgae, Adsorption Isotherm",

author = "Garnham, {Geoffrey W.} and Codd, {Geoffrey A.} and Gadd, {Geoffrey M.}",

year = "1993",

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doi = "10.1007/BF00205072",

language = "English",

volume = "39",

pages = "666--672",

journal = "Applied Microbiology and Biotechnology",

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TY - JOUR

T1 - Accumulation of zirconium by microalgae and cyanobacteria

AU - Garnham, Geoffrey W.

AU - Codd, Geoffrey A.

AU - Gadd, Geoffrey M.

PY - 1993/7

Y1 - 1993/7

N2 - 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+, Mg+ 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.

AB - 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+, Mg+ 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.

KW - Chloride

KW - Cell Wall

KW - Zirconium

KW - Microalgae

KW - Adsorption Isotherm

UR - http://www.scopus.com/inward/record.url?scp=0027194385&partnerID=8YFLogxK

U2 - 10.1007/BF00205072

DO - 10.1007/BF00205072

M3 - Article

AN - SCOPUS:0027194385

SN - 0175-7598

VL - 39

SP - 666

EP - 672

JO - Applied Microbiology and Biotechnology

JF - Applied Microbiology and Biotechnology

IS - 4-5

ER -

Accumulation of zirconium by microalgae and cyanobacteria

Abstract

Keywords

ASJC Scopus subject areas

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