Removal of methylene blue from aqueous solutions using raw and modified rice husk

Kazembeigi, Farough. and Soheil Arezoomand, Hamidreza. and Faraji, Hossein. and Mazloomi, Sajad. and Mohammadi Moghadam, Fazel. and Nourmoradi, Heshmatollah. (2014) Removal of methylene blue from aqueous solutions using raw and modified rice husk. The Veliger, 53.

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Abstract

ABSTRACT, one of the most important environmental pollutants is dye containing wastewaters. Methylene blue (MB) is a cationic dye that has carcinogenic and mutagenic effects on human. This study was investigated to remove methylene blue dye from aqueous solutions by raw and modified rice husk (Raw-RH and Modified-RH). The influence of various parameters including pH, contact time, adsorbent dose and initial dye concentration was studied on the dye removal efficiencyin a batch system. The results showed that the equilibrium was obtained at the contact time of 90 min and the maximum dye removal was also occurred at pH 10 for both the Raw-RH and Modified-RH adsorbents. The experimental data were analyzed by the Langmuir and Freundlich isotherm models. The findings showed that the data were best fitted with the Freundlich isotherm. The obtained data for MB adsorption onto the Raw-RH and Modified-RH were also fitted via the pseudo-first order and pseudo-second order kinetic models. The correlation coefficients values (R2 ) showed that the adsorption kinetic described well by the pseudo-second order model. The results of this study indicated that rice husk can be used as an effective and low-cost adsorbent for the removal of methylene blue from aqueous solutions.

Item Type: Article
Uncontrolled Keywords: Adsorption, Methylene blue, Rice husk, Aqueous solution.
Subjects: WA Public Health
WA Public Health > Public Health Education WA.18 > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
Divisions: Faculty of Health > Department of Environmental Health
Depositing User: zahra bagheri .
Date Deposited: 25 Nov 2017 11:00
Last Modified: 13 Jun 2018 09:00
URI: http://eprints.skums.ac.ir/id/eprint/6423

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