US EPA

574788 

Journal Article 

Adsorption of Pb(II) and Cd(II) metal ions from aqueous solutions by mustard husk 

Meena, AK; Kadirvelu, K; Mishraa, GK; Rajagopal, C; Nagar, PN 

2008 

Yes 

Journal of Hazardous Materials
ISSN: 0304-3894
EISSN: 1873-3336 

150 

3 

619-625 

English 

17574736 

10.1016/j.jhazmat.2007.05.011 

WOS:000253219500019 

The adsorption of Pb(II) and Cd(II) metal ions on mustard husk has been found to be concentration, pH, contact time, adsorbent dose and temperature dependent. The adsorption parameters were determined using Langmuir and Freundlich isotherm models. The adsorption isotherm studies clearly indicated that the adsorptive behavior of Pb(II) and Cd(II) metal ions on mustard husk satisfies not only the Langmuir assumptions but also the Freundlich assumptions, i.e. multilayer formation on the surface of the adsorbent with an exponential distribution of site energy. Ion exchange and surface complexation are the major adsorption mechanisms involved. The applicability of Lagergren kinetic model has also been investigated. Thermodynamic constant (kad), free energy change ([Delta]G), enthalpy change ([Delta]H) and entropy change ([Delta]S) were calculated for predicting the nature of adsorption. The results indicate the potential application of this method for effluent treatment in industries and also provide strong evidence to support the adsorption mechanism proposed. 

Mustard husk; Metals ions; Adsorption; Wastewater; Isotherms; Kinetics