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Removal of molybdate from water by adsorption onto ZnCl2 activated coir pith carbon.
Bioresour Technol. 2006 Jul; 97(10):1194-200.BT

Abstract

Removal and recovery of molybdate from aqueous solution was investigated using ZnCl2 activated carbon developed from coir pith. Studies were conducted to delineate the effects of contact time, adsorbent dose, molybdate concentration, pH and temperature. Two theoretical adsorption isotherms, namely, Langmuir and Freundlich were used to describe the experimental results. The Langmuir adsorption capacity (Q0) was found to be 18.9 mg molybdate/g of the adsorbent. Adsorption followed second order kinetics. Studies were performed at different pH values to find out the pH at which maximum adsorption occurred. The pH effect and desorption studies showed that ion exchange and chemisorption mechanism were involved in the adsorption process. Thermodynamic parameters such as DeltaG0, DeltaH0 and DeltaS0 for the adsorption were evaluated. Effect of foreign ions on adsorption of molybdate has been examined. The results showed that ZnCl2 activated coir pith carbon was effective for the removal and recovery of molybdate from water.

Authors+Show Affiliations

Namasivayam C
Environmental Chemistry Division, Department of Environmental Sciences, Bharathiar University, Coimbatore 641 046, India. cnamasi@vsnl.com
Sangeetha D
No affiliation info available

MeSH

AdsorptionCarbonChloridesHydrogen-Ion ConcentrationMolybdenumSolutionsTemperatureThermodynamicsWaterZinc Compounds

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16006123

Citation

Namasivayam, C, and D Sangeetha. "Removal of Molybdate From Water By Adsorption Onto ZnCl2 Activated Coir Pith Carbon." Bioresource Technology, vol. 97, no. 10, 2006, pp. 1194-200.
Namasivayam C, Sangeetha D. Removal of molybdate from water by adsorption onto ZnCl2 activated coir pith carbon. Bioresour Technol. 2006;97(10):1194-200.
Namasivayam, C., & Sangeetha, D. (2006). Removal of molybdate from water by adsorption onto ZnCl2 activated coir pith carbon. Bioresource Technology, 97(10), 1194-200.
Namasivayam C, Sangeetha D. Removal of Molybdate From Water By Adsorption Onto ZnCl2 Activated Coir Pith Carbon. Bioresour Technol. 2006;97(10):1194-200. PubMed PMID: 16006123.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Removal of molybdate from water by adsorption onto ZnCl2 activated coir pith carbon. AU - Namasivayam,C, AU - Sangeetha,D, Y1 - 2005/07/11/ PY - 2004/08/31/received PY - 2005/05/16/revised PY - 2005/05/18/accepted PY - 2005/7/12/pubmed PY - 2006/6/6/medline PY - 2005/7/12/entrez SP - 1194 EP - 200 JF - Bioresource technology JO - Bioresour Technol VL - 97 IS - 10 N2 - Removal and recovery of molybdate from aqueous solution was investigated using ZnCl2 activated carbon developed from coir pith. Studies were conducted to delineate the effects of contact time, adsorbent dose, molybdate concentration, pH and temperature. Two theoretical adsorption isotherms, namely, Langmuir and Freundlich were used to describe the experimental results. The Langmuir adsorption capacity (Q0) was found to be 18.9 mg molybdate/g of the adsorbent. Adsorption followed second order kinetics. Studies were performed at different pH values to find out the pH at which maximum adsorption occurred. The pH effect and desorption studies showed that ion exchange and chemisorption mechanism were involved in the adsorption process. Thermodynamic parameters such as DeltaG0, DeltaH0 and DeltaS0 for the adsorption were evaluated. Effect of foreign ions on adsorption of molybdate has been examined. The results showed that ZnCl2 activated coir pith carbon was effective for the removal and recovery of molybdate from water. SN - 0960-8524 UR - https://www.unboundmedicine.com/medline/citation/16006123/Removal_of_molybdate_from_water_by_adsorption_onto_ZnCl2_activated_coir_pith_carbon_ DB - PRIME DP - Unbound Medicine ER -