Kappaphycus alvarezii waste biomass: A potential biosorbent for chromium
ions removal |
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Authors: | Oon Lee Kang Nazaruddin Ramli Mamot Sai Musa Ahma Suhaimi Md Yasir and Arbakariya Ariff |
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Institution: | 1. School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor,Malaysia 2. School of Sciences and Technology, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia 3. Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia |
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Abstract: | The Cr(III) sorption experiments onto Kappaphycus alvarezii waste biomass were conducted at different pH values (2-6) under the conditions of initial metal concentration of 10-50 mg/L and the chemical compositions of Cr-Cu and Cr-Cd. The Cr(III) sorption capacities were slightly dependent on pH, and the maximum sorption capacity was 0.86 mg/g at pH 3. The sorption capacities increased with increase in the initial metal concentration, whereas it was suppressed by the presence of Cu(II) and Cd(III) in the solution. The Cr(III) sorption equilibrium was evaluated using Langmuir, Freundlich and BET isotherms. The sorption mechanisms were characterised using scanning electron microscopy and Fourier transform infrared spectroscopy. The main mechanisms were ion exchange coupled with a complexation mechanism. Kappaphycus alvarezii waste biomass represents a potential for Cr(III) ion removal from aqueous solution. |
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Keywords: | biosorption chromium Kappaphycus alvarezii |
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