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Arsenic accumulation by arsenic‐tolerant freshwater blue‐green alga ( Phormidium sp.)
Author(s) -
Maeda Shigeru,
Fujita Saori,
Ohki Akira,
Yoshifuku Isami,
Higashi Shiro,
Takeshita Toshio
Publication year - 1988
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590020412
Subject(s) - arsenic , chemistry , environmental chemistry , organic chemistry
Accumulation, biomethylation and excretion of arsenic by the arsenic‐tolerant freshwater blue–green alga, Phormidium sp., which had been isolated from an arsenic‐polluted environment, were investigated. The cellular growth curves were in fair agreement with a ‘logistic curve’ equation. The growth increased with an increase in the surrounding arsenic concentration up to 100 m̈g g −1 . The cells survived even at 7000 m̈g g −1 . The arsenic concentration of the cells increased with an increase of the surrounding arsenic concentration up to 7000 m̈g g −1 . Phosphorus concentrations in the medium affected the growth and arsenic accumulation. No arsenic was accumulated by cells killed by ethanol. The arsenic was methylated to the extent of 3.2% of the total arsenic accumulated. When the cells were transferred into an arsenic‐free medium, 85% of the arsenic accumulated was excreted; 58% of the excreted arsenic was in methylated form implying extensive methylation in the arsenic‐free medium.