Interactions of metals and protons with algae

来自 ACS

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作者：

RH Crist，K Oberholser，D Schwartz，J Marzoff，D Ryder，DLR Crist

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摘要：

Proton uptake by intact algal cells was found to consist of two processes: (1) a fast (<4 s) surface reaction and (2) a slow (2h) diffusion of protons into cells. A pH titration technique measured only the rapid surface reaction that forms negative sites at higher pH. Adsorption of alkali, alkaline earth, and transition metal ions on algae was quantitatively represented by the Langmuir adsorption isotherm with its two parameters y/sub m/, the maximum amount of metal adsorbed, and K, the equilibrium constant taken as a measure of bond strength. Variations of these parameters with pH and type of metal indicate that metals adsorb to algal surfaces by electrostatic attraction to negative sites, such as carboxylate anions of poly(galaturonic acid) (pectin), as previously suggested.

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关键词：

radiation, thermal, and other environ. pollutant effects on living orgs. and biol. mat alkali metals uptake alkaline earth metals protons transition elements adsorption adsorption isotherms algae ph value