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REMOVAL OF Cd (II) FROM AQUEOUS SOLUTION BY ADSORPTION ONTO COIR PITH, AN AGRICULTURAL SOLID WASTE: BATCH EXPERIMENTAL STUDY
Autori: Nagendra Badabhagni, Puthiya Veetil Nidheesh, Rajan Gandhimathi, Srikrishnaperumal Thanga Ramesh
Data aparitiei: November/2011
Revista: Environmental Engineering and Management JournalVol. 10Nr. 11
ISSN: 1843 - 3707
Pret: Gratuit    
Format PDF Format PDF
Abstract:

Coconut coir pith, an agricultural solid waste was used for the sorption of Cd (II) from aqueous solution in batch mode. Parameters like contact time, adsorbent dosage and pH effect were studied. Langmuir and Freundlich isotherms were used to model the adsorption equilibrium data and the system followed both the isotherms. Cd (II) adsorption capacity of coir pith was found to be 18.72 mg/g. Kinetic parameters of adsorption such as the Langergren pseudo-first-order, pseudo second order rate constant and the intraparticle diffusion rate constant were determined. Kinetic studies revealed that the adsorption process followed a pseudo-second order kinetic model.


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