Adsorption of fulvic acid on algal surfaces and its effect on carbon uptake

Article Article scientifique Article Adsorption of fulvic acid on algal surfaces and its effect on carbon uptake eng 2001-12-21 2001-12-21 author Knauer Katja 508013 author Buffle Jacques 24673 Administration de la faculté des sciences (SIAD) 47-51 10.1046/j.1529-8817.2001.037001047.x 0022-3646 Adsorption of Suwannee River fulvic acid (SRFA) to algal surfaces of three green algae was studied at environmentally relevant pH values (4–7) and SRFA concentrations (5–100 mg·L −1 ). The influence of adsorbed SRFA on carbon uptake of Scenedesmus subspicatus Chodat was also examined. Although no adsorption was observed at neutral pH values (pH 6 and 7), at pH 4 up to 31 mg SRFA·m −2 and at pH 5 up to 4 mg SRFA·m −2 was adsorbed to the algal surfaces. Electrophoretic mobility measurements of S. subspicatus demonstrated an increase in the negative surface charge of the alga in the presence of SRFA at pH 4. The adsorbed SRFA also influenced 14C uptake in S. subspicatus; in this case, enhanced carbon uptake could be related to the amount of adsorbed SRFA. The binding of humic substances by algal surfaces was interpreted as the result of hydrogen bonding and hydrophobic interactions. Adsorption Algae Carbon assimilation Humic substances Surface pH Dewey 540 40 Département de chimie minérale, analytique et appliquée 145 false Journal of phycology 37 1 59416b30-4ebc-49cc-86e4-8ba62363d6b7 Article (Published version) Restricted Knauer_JOP_20013647.pdf 240856 application/pdf e864323db371af8e8d55cf83ef61d3c1368493d44e14a8e42b24de52cb09f002 restrictedAccess Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée

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Adsorption of fulvic acid on algal surfaces and its effect on carbon uptake	Journal of phycology			2001	90	0

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Knauer, Katja