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A preliminary study on the adsorptive removal of Cr(VI) using seaweed, Hydrilla verticillata.
J Hazard Mater. 2009 Nov 15; 171(1-3):358-69.JH

Abstract

The Cr(VI) adsorption efficiency of the seaweed, Hydrilla verticillata, was studied in batches. The adsorbent was characterized using SEM, BET surface area analyzer, Malvern particle size analyzer, EDAX and FT-IR. Cr(VI) removal efficiency of the adsorbent was studied as a function of different adsorption parameters such as contact time, stirring speed, pH, adsorbent dose, particle size, adsorbate concentration, and temperature. Langmuir, Freundlich, and Temkin adsorption isotherm equations were used in the equilibrium modeling. The adsorption process followed pseudo second-order kinetics and intra-particle diffusion was found to be the rate-controlling step. Experimental data follow Langmuir adsorption isotherm. Thermodynamic parameters such as Gibbs free energy and enthalpy of the adsorption process were evaluated to find out the feasibility of the adsorption process. The negative values of Gibb's free energy and positive enthalpy values show the feasibility and endothermic nature of the process. The significance of different adsorption parameters along with their combined effect on the adsorption process has been established through a full 2(4) factorial design. Among the different adsorption parameters, pH has the most influential effect on the adsorption process followed by adsorbate concentration and combined effects of all the four parameters were tested. The correlation among different adsorption parameters were studied using multi-variate analysis.

Authors+Show Affiliations

Chemical Engineering Group, Birla Institute of Technology & Science, Zuarinagar, Goa-403726, India. ss_baral2003@yahoo.co.inNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19592164

Citation

Baral, S S., et al. "A Preliminary Study On the Adsorptive Removal of Cr(VI) Using Seaweed, Hydrilla Verticillata." Journal of Hazardous Materials, vol. 171, no. 1-3, 2009, pp. 358-69.
Baral SS, Das N, Roy Chaudhury G, et al. A preliminary study on the adsorptive removal of Cr(VI) using seaweed, Hydrilla verticillata. J Hazard Mater. 2009;171(1-3):358-69.
Baral, S. S., Das, N., Roy Chaudhury, G., & Das, S. N. (2009). A preliminary study on the adsorptive removal of Cr(VI) using seaweed, Hydrilla verticillata. Journal of Hazardous Materials, 171(1-3), 358-69. https://doi.org/10.1016/j.jhazmat.2009.06.011
Baral SS, et al. A Preliminary Study On the Adsorptive Removal of Cr(VI) Using Seaweed, Hydrilla Verticillata. J Hazard Mater. 2009 Nov 15;171(1-3):358-69. PubMed PMID: 19592164.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - A preliminary study on the adsorptive removal of Cr(VI) using seaweed, Hydrilla verticillata. AU - Baral,S S, AU - Das,Namrata, AU - Roy Chaudhury,G, AU - Das,S N, Y1 - 2009/06/11/ PY - 2009/03/15/received PY - 2009/05/13/revised PY - 2009/06/04/accepted PY - 2009/7/14/entrez PY - 2009/7/14/pubmed PY - 2010/1/20/medline SP - 358 EP - 69 JF - Journal of hazardous materials JO - J Hazard Mater VL - 171 IS - 1-3 N2 - The Cr(VI) adsorption efficiency of the seaweed, Hydrilla verticillata, was studied in batches. The adsorbent was characterized using SEM, BET surface area analyzer, Malvern particle size analyzer, EDAX and FT-IR. Cr(VI) removal efficiency of the adsorbent was studied as a function of different adsorption parameters such as contact time, stirring speed, pH, adsorbent dose, particle size, adsorbate concentration, and temperature. Langmuir, Freundlich, and Temkin adsorption isotherm equations were used in the equilibrium modeling. The adsorption process followed pseudo second-order kinetics and intra-particle diffusion was found to be the rate-controlling step. Experimental data follow Langmuir adsorption isotherm. Thermodynamic parameters such as Gibbs free energy and enthalpy of the adsorption process were evaluated to find out the feasibility of the adsorption process. The negative values of Gibb's free energy and positive enthalpy values show the feasibility and endothermic nature of the process. The significance of different adsorption parameters along with their combined effect on the adsorption process has been established through a full 2(4) factorial design. Among the different adsorption parameters, pH has the most influential effect on the adsorption process followed by adsorbate concentration and combined effects of all the four parameters were tested. The correlation among different adsorption parameters were studied using multi-variate analysis. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19592164/A_preliminary_study_on_the_adsorptive_removal_of_Cr_VI__using_seaweed_Hydrilla_verticillata_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00921-2 DB - PRIME DP - Unbound Medicine ER -