COMPARATIVEPb(II)ADSORPTION BY ACTIVATED CARBON FROM AFRICAN STAR APPLE(Chrysophylumalbidum)AND PAWPAW(Carica papaya)SEEDS DOI Open Access

Emmanuel Osabohien,

Loretta C. Overah,

Yvonne Anikwushe

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 22(1), P. 161 - 179

Published: April 30, 2024

Two types of phosphate-activated carbon were prepared from African star apple(Chrysophylumalbidum)(CAAC) seed shell and pawpaw (Carica papaya) (CPAC) seeds, characterized, employed for Pb(II) ion sorption simulated contaminated water by studying the rates effects pH, dosage temperature. Experimental data assessed using kinetic models, thermodynamic properties investigated. Characterizations suggested hydroxyl, carboxyl, amides, phosphate functional groups active in adsorption. The uptake was swift, as equilibrium attained within 60 minutes both adsorbents. pseudo-second-order (PSO) fractal (FPSO) kinetics models fitted rate data. effective adsorbent dose 50 mL contaminant solution 1.0 g CAAC CPAC adsorbents, pH optimum 5. process exothermic increasingly spontaneous with higher temperatures reduced entropy transitioned towards equilibrium. BothCAAC adsorbents may be treatment over a wide temperature range. Comparatively, bothadsorbents exhibited similar strength.

Language: Английский

COMPARATIVEPb(II)ADSORPTION BY ACTIVATED CARBON FROM AFRICAN STAR APPLE(Chrysophylumalbidum)AND PAWPAW(Carica papaya)SEEDS DOI Open Access

Emmanuel Osabohien,

Loretta C. Overah,

Yvonne Anikwushe

et al.

Deleted Journal, Journal Year: 2024, Volume and Issue: 22(1), P. 161 - 179

Published: April 30, 2024

Two types of phosphate-activated carbon were prepared from African star apple(Chrysophylumalbidum)(CAAC) seed shell and pawpaw (Carica papaya) (CPAC) seeds, characterized, employed for Pb(II) ion sorption simulated contaminated water by studying the rates effects pH, dosage temperature. Experimental data assessed using kinetic models, thermodynamic properties investigated. Characterizations suggested hydroxyl, carboxyl, amides, phosphate functional groups active in adsorption. The uptake was swift, as equilibrium attained within 60 minutes both adsorbents. pseudo-second-order (PSO) fractal (FPSO) kinetics models fitted rate data. effective adsorbent dose 50 mL contaminant solution 1.0 g CAAC CPAC adsorbents, pH optimum 5. process exothermic increasingly spontaneous with higher temperatures reduced entropy transitioned towards equilibrium. BothCAAC adsorbents may be treatment over a wide temperature range. Comparatively, bothadsorbents exhibited similar strength.

Language: Английский

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