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Adsorptive separation of cadmium from aqueous solutions and wastewaters by riverbed sand.
Environ Pollut. 2007 Nov; 150(2):251-7.EP

Abstract

Application of riverbed sand for the adsorptive separation of cadmium(II) from aqueous solutions has been investigated. Removal increased from 26.8 to 56.4% by decreasing the initial concentration of cadmium from 7.5 x 10(-5) to 1.0 x 10(-5)M at pH 6.5, 25 degrees C temperature, agitation speed of 100 rpm, 100 microm particle size and 1.0 x 10(-2) NaClO4 ionic strength. Process of separation is governed by first order rate kinetics. The value of rate constant of adsorption, k(ad), was found to be 2.30 x 10(-2)per min at 25 degrees C. Values of coefficient of mass transfer, beta L, were calculated and its value at 25 degrees C was found to be 1.92 x 10(-2)cm/s. Values of Langmuir constant were calculated. Values of thermodynamic parameters delta G0, delta H0 and delta S0 were also calculated and were recorded as -0.81 kcal/mol, -9.31 kcal/mol and -28.10 cal/mol at 25 degrees C. pH has been found to affect the removal of cadmium significantly and maximum removal, 58.4%, has been found at pH 8.5. Process can be used for treatment of cadmium(II) rich wastewaters.

Authors+Show Affiliations

Environmental Engineering and Research Laboratories, Department of Applied Chemistry, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India. y_sharma_2002@rediffmail.comNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17376570

Citation

Sharma, Y C., et al. "Adsorptive Separation of Cadmium From Aqueous Solutions and Wastewaters By Riverbed Sand." Environmental Pollution (Barking, Essex : 1987), vol. 150, no. 2, 2007, pp. 251-7.
Sharma YC, Kaul SN, Weng CH. Adsorptive separation of cadmium from aqueous solutions and wastewaters by riverbed sand. Environ Pollut. 2007;150(2):251-7.
Sharma, Y. C., Kaul, S. N., & Weng, C. H. (2007). Adsorptive separation of cadmium from aqueous solutions and wastewaters by riverbed sand. Environmental Pollution (Barking, Essex : 1987), 150(2), 251-7.
Sharma YC, Kaul SN, Weng CH. Adsorptive Separation of Cadmium From Aqueous Solutions and Wastewaters By Riverbed Sand. Environ Pollut. 2007;150(2):251-7. PubMed PMID: 17376570.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adsorptive separation of cadmium from aqueous solutions and wastewaters by riverbed sand. AU - Sharma,Y C, AU - Kaul,S N, AU - Weng,C H, Y1 - 2007/03/21/ PY - 2006/09/15/received PY - 2007/01/16/revised PY - 2007/01/20/accepted PY - 2007/3/23/pubmed PY - 2008/6/18/medline PY - 2007/3/23/entrez SP - 251 EP - 7 JF - Environmental pollution (Barking, Essex : 1987) JO - Environ Pollut VL - 150 IS - 2 N2 - Application of riverbed sand for the adsorptive separation of cadmium(II) from aqueous solutions has been investigated. Removal increased from 26.8 to 56.4% by decreasing the initial concentration of cadmium from 7.5 x 10(-5) to 1.0 x 10(-5)M at pH 6.5, 25 degrees C temperature, agitation speed of 100 rpm, 100 microm particle size and 1.0 x 10(-2) NaClO4 ionic strength. Process of separation is governed by first order rate kinetics. The value of rate constant of adsorption, k(ad), was found to be 2.30 x 10(-2)per min at 25 degrees C. Values of coefficient of mass transfer, beta L, were calculated and its value at 25 degrees C was found to be 1.92 x 10(-2)cm/s. Values of Langmuir constant were calculated. Values of thermodynamic parameters delta G0, delta H0 and delta S0 were also calculated and were recorded as -0.81 kcal/mol, -9.31 kcal/mol and -28.10 cal/mol at 25 degrees C. pH has been found to affect the removal of cadmium significantly and maximum removal, 58.4%, has been found at pH 8.5. Process can be used for treatment of cadmium(II) rich wastewaters. SN - 0269-7491 UR - https://www.unboundmedicine.com/medline/citation/17376570/Adsorptive_separation_of_cadmium_from_aqueous_solutions_and_wastewaters_by_riverbed_sand_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0269-7491(07)00056-5 DB - PRIME DP - Unbound Medicine ER -