Biosorption of Hexavalent Chromium by Pachymeniopsis sp. Dead Cells

초록

Selectivity and adsorption mechanism of red marine algae Pachymeniopsis sp. were batch-tested heavy metals. Biosorbent showed higher selectivity for chromium than cadmium and manganese. Chromium adsorption by Pachymeniopsis sp. dead cell powder followed Langmuir-type isotherm, with maximum adsorption capacity being 225 mg/g. Chromium sorption isotherm of Pachymeniopsis dead cell powder was similar to that of anion exchange resin and sorption mechanism was proved to through anionic exchange of biosorbent. Desorption of chromate from biosorbent was more effective higher pH. FTIR spectra showed cell wall components of Pachymeniopsis sp. were different from those of alginic acid, agarose, and κ-carrageenan. Results demonstrated Pachymeniopsis sp. dead cell powder had strong potential as biosorbent for treatment of wastewater containing hexavalent chromium.

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