Screening of marine microalgae for bioremediation of cadmium-polluted seawater

Tadashi Matsunaga; Haruko Takeyama; Takashi Nakao; Akira Yamazawa

doi:10.1016/S0079-6352(99)80095-2

Screening of marine microalgae for bioremediation of cadmium-polluted seawater

Tadashi Matsunaga^*, Haruko Takeyama, Takashi Nakao, Akira Yamazawa

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Twenty four strains out of 191 marine microalgal strains exhibited cadmium (Cd) resistance. They were tested for their Cd removal ability in growth media containing 50 μM Cd. Six strains out of 19 green algae and one out of five cyanobacteria removed more than 10% of total Cd from the medium. The marine green alga Chlorella sp. NKG16014 showed the highest removal of Cd 48.7% of total. Cd removal by NKG 16014 was further quantitatively evaluated by measuring the amount of cell adsorption and intracellular accumulation. After 12 days incubation, 67% of the removed Cd was accumulated intracellularly and 25% of the Cd removed was adsorbed on the algal cell surface. The maximum Cd adsorption (q_max) was estimated to be 37.0 mg Cd (g dry cells)^{- 1} using the Langmuir sorption model. The Cd removal by freeze-dried NKG16014 cells was also determined. Cd was more quickly adsorbed by dried cells than that by living cells, with a q_max of 91.0 mg Cd (g dry cells)^{- 1}.

Original language	English
Pages (from-to)	33-38
Number of pages	6
Journal	Progress in Industrial Microbiology
Volume	35
Issue number	C
DOIs	https://doi.org/10.1016/S0079-6352(99)80095-2
Publication status	Published - 1999
Externally published	Yes

Keywords

Adsorption
Bioremediation
Cadmium
Marine Chlorella
Marine microalgae
Screening

ASJC Scopus subject areas

Biotechnology
Applied Microbiology and Biotechnology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/S0079-6352(99)80095-2

Cite this

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title = "Screening of marine microalgae for bioremediation of cadmium-polluted seawater",

abstract = "Twenty four strains out of 191 marine microalgal strains exhibited cadmium (Cd) resistance. They were tested for their Cd removal ability in growth media containing 50 μM Cd. Six strains out of 19 green algae and one out of five cyanobacteria removed more than 10% of total Cd from the medium. The marine green alga Chlorella sp. NKG16014 showed the highest removal of Cd 48.7% of total. Cd removal by NKG 16014 was further quantitatively evaluated by measuring the amount of cell adsorption and intracellular accumulation. After 12 days incubation, 67% of the removed Cd was accumulated intracellularly and 25% of the Cd removed was adsorbed on the algal cell surface. The maximum Cd adsorption (qmax) was estimated to be 37.0 mg Cd (g dry cells)- 1 using the Langmuir sorption model. The Cd removal by freeze-dried NKG16014 cells was also determined. Cd was more quickly adsorbed by dried cells than that by living cells, with a qmax of 91.0 mg Cd (g dry cells)- 1.",

keywords = "Adsorption, Bioremediation, Cadmium, Marine Chlorella, Marine microalgae, Screening",

author = "Tadashi Matsunaga and Haruko Takeyama and Takashi Nakao and Akira Yamazawa",

year = "1999",

doi = "10.1016/S0079-6352(99)80095-2",

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AU - Matsunaga, Tadashi

AU - Takeyama, Haruko

AU - Nakao, Takashi

AU - Yamazawa, Akira

PY - 1999

Y1 - 1999

N2 - Twenty four strains out of 191 marine microalgal strains exhibited cadmium (Cd) resistance. They were tested for their Cd removal ability in growth media containing 50 μM Cd. Six strains out of 19 green algae and one out of five cyanobacteria removed more than 10% of total Cd from the medium. The marine green alga Chlorella sp. NKG16014 showed the highest removal of Cd 48.7% of total. Cd removal by NKG 16014 was further quantitatively evaluated by measuring the amount of cell adsorption and intracellular accumulation. After 12 days incubation, 67% of the removed Cd was accumulated intracellularly and 25% of the Cd removed was adsorbed on the algal cell surface. The maximum Cd adsorption (qmax) was estimated to be 37.0 mg Cd (g dry cells)- 1 using the Langmuir sorption model. The Cd removal by freeze-dried NKG16014 cells was also determined. Cd was more quickly adsorbed by dried cells than that by living cells, with a qmax of 91.0 mg Cd (g dry cells)- 1.

AB - Twenty four strains out of 191 marine microalgal strains exhibited cadmium (Cd) resistance. They were tested for their Cd removal ability in growth media containing 50 μM Cd. Six strains out of 19 green algae and one out of five cyanobacteria removed more than 10% of total Cd from the medium. The marine green alga Chlorella sp. NKG16014 showed the highest removal of Cd 48.7% of total. Cd removal by NKG 16014 was further quantitatively evaluated by measuring the amount of cell adsorption and intracellular accumulation. After 12 days incubation, 67% of the removed Cd was accumulated intracellularly and 25% of the Cd removed was adsorbed on the algal cell surface. The maximum Cd adsorption (qmax) was estimated to be 37.0 mg Cd (g dry cells)- 1 using the Langmuir sorption model. The Cd removal by freeze-dried NKG16014 cells was also determined. Cd was more quickly adsorbed by dried cells than that by living cells, with a qmax of 91.0 mg Cd (g dry cells)- 1.

KW - Adsorption

KW - Bioremediation

KW - Cadmium

KW - Marine Chlorella

KW - Marine microalgae

KW - Screening

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Screening of marine microalgae for bioremediation of cadmium-polluted seawater

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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