PERFORMANCE OF CATIONIC SURFACTANT MODIFIED SEPIOLITE AND BENTONITE IN LEAD SORPTION FROM AQUEOUS SOLUTIONS

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RAFIEI H.R.; SHIRVANI M.; BEHZAD T.

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Journal: Journal of Water and Soil Year:2014 | Volume:28 | Issue:4 Page(s): 818-835

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Information Journal Paper

Title

PERFORMANCE OF CATIONIC SURFACTANT MODIFIED SEPIOLITE AND BENTONITE IN LEAD SORPTION FROM AQUEOUS SOLUTIONS

Author(s)

RAFIEI H.R. | SHIRVANI M. | BEHZAD T. | Issue Writer Certificate

Keywords

PB SORPTIONQ2

LANGMUIR ISOTHERMQ2

CTMA SURFACTANTQ2

BENTONITEQ1

SEPIOLITEQ1

Abstract

The remediation of soils and water contaminated with heavy metals generate a great need to develop efficient adsorbents for these pollutants. This study reports the sorption of lead (Pb) by BENTONITE (Bent), and SEPIOLITE (Sep), that were modified with cetyltrimethyl ammonium (CTMA+) organic cations. The natural and surfactant modified clays (organo-clays) were characterized with some instrumental techniques including XRF, XRD, FTIR and SEM. Sorption studies were performed in a batch system, and the effects of various experimentalparameters including contact time and initial Pb concentration were evaluated upon the PB SORPTION on tosorbents. Maximum sorption of Pb was found to be, 83.26, 71.36, 56.25 and 37 mg g-1 for Sep, CTMA-Sep, Bentand CTMA-Bent adsorbents, respectively. The PB SORPTION data were fitted to both the Langmuir and Freundlich models. The Freundlich model represented the sorption process better than the Langmuir model. Lead sorptionrate was found to be considerably slower for organo-clays than that for unmodified clays. Sorption kinetics was evaluated by pseudo-first order, pseudo-second order, Elovich and intraparticle diffusion models. The sorption processes of organo-clays followed in traparticle diffusion kinetics. The results showed that the cationicsurfactant modified BENTONITE and SEPIOLITE sorbed less Pb than the unmodified clays.

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APA: Copy

RAFIEI, H.R., SHIRVANI, M., & BEHZAD, T.. (2014). PERFORMANCE OF CATIONIC SURFACTANT MODIFIED SEPIOLITE AND BENTONITE IN LEAD SORPTION FROM AQUEOUS SOLUTIONS. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), 28(4), 818-835. SID. https://sid.ir/paper/141227/en

Vancouver: Copy

RAFIEI H.R., SHIRVANI M., BEHZAD T.. PERFORMANCE OF CATIONIC SURFACTANT MODIFIED SEPIOLITE AND BENTONITE IN LEAD SORPTION FROM AQUEOUS SOLUTIONS. JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)[Internet]. 2014;28(4):818-835. Available from: https://sid.ir/paper/141227/en

IEEE: Copy

H.R. RAFIEI, M. SHIRVANI, and T. BEHZAD, “PERFORMANCE OF CATIONIC SURFACTANT MODIFIED SEPIOLITE AND BENTONITE IN LEAD SORPTION FROM AQUEOUS SOLUTIONS,” JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY), vol. 28, no. 4, pp. 818–835, 2014, [Online]. Available: https://sid.ir/paper/141227/en

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