Evaluation of Layered Double Hydroxide Synthesised from a Green Biogenic Precursor for Phosphate Removal: Characterisations and Isotherms
American Journal of BioScience
Volume 5, Issue 2, March 2017, Pages: 13-24
Received: Feb. 8, 2017;
Accepted: Mar. 13, 2017;
Published: Mar. 22, 2017
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Ruth Olubukola Ajoke Adelagun, Department of Chemical Sciences, Federal University Wukari, Wukari, Nigeria
Nurudeen Abiola Oladoja, Department of Chemical Sciences, Adekunle Ajasin University, Akungba - Akoko, Ondo, Nigeria
Isaac Ayodele Ololade, Department of Chemical Sciences, Adekunle Ajasin University, Akungba - Akoko, Ondo, Nigeria
Adeniyi Samson Adeyemo, Department of Chemical Sciences, Adekunle Ajasin University, Akungba - Akoko, Ondo, Nigeria
CaCr LDH materials were synthesized by the co-precipitation method, using Gastropod shell as a biogenic source of Ca2+. The mineralogical, surficial morphology and elemental composition analysis of the materials showed characteristics typical of hydrotalcite-like materials, composed of Ca, Cr, O, C and Cl. Batch equilibrium adsorption studies showed that phosphate sorption on the LDH reached equilibrium within 5 min with about 98% removal. The sorption of phosphate was well described by the Langmuir isotherm model. The monolayer adsorption capacity of the CaCr LDH for phosphate was 142.86 mg/g. Mechanistic studies of phosphate removal by the LDHs was elucidated via instrumental analysis, vis-a viz, SEM-EDX, XRD and FTIR. Results revealed that phosphate was removed via the combination of ion exchange and precipitation. It could be inferred that CaCr LDH synthesised using Gastropod shell as a biogenic source of Ca2+ is a suitable adsorbent for phosphate removal from aqua system.
Ruth Olubukola Ajoke Adelagun,
Nurudeen Abiola Oladoja,
Isaac Ayodele Ololade,
Adeniyi Samson Adeyemo,
Evaluation of Layered Double Hydroxide Synthesised from a Green Biogenic Precursor for Phosphate Removal: Characterisations and Isotherms, American Journal of BioScience.
Vol. 5, No. 2,
2017, pp. 13-24.
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