Evaluation of almond shells magnetized by iron nano -particles for nitrate removal from aqueous solution: Study of adsorption isotherm

Arbabi, Mohsen. and Hemati, Sara. and Raygan, Shahram. and Sedehi, Morteza. and Khodabakhshi, Abbas. and Fadaei, Abdolmajid. (2016) Evaluation of almond shells magnetized by iron nano -particles for nitrate removal from aqueous solution: Study of adsorption isotherm. Journal of Shahrekord University of Medical Sciences, 17 (6).

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Abstract

Background and aims: One of the most common environmental pollutants to groundwater and surface water is nitrates. High nitrate levels in drinking water cause diseases such as methemoglobinemia in children, gastric cancer and abortions. This study aimed to investigate the absorption isotherm of almond shell carbon activated with the magnetic nanoparticles to reduce nitrate in aqueous environments. Methods: In this experimental study , morphology of synthesized adsorbent was analyzed using FESEM and BET techniques. The effective parameters on nitrate ion absorption process such as pH (4 -8), the amount of absorbent (0.25 - 1 g/L), the initial concentration of nitrate ions (25 -400 mg/L) and contact time (20 -100 min) were investigated. In this research, Taguchi method was applied for determining the sample size and statistical analysis. Results: Findings of FESEM and BET techniques confirmed that magnetic nanoparticles size and specific surface area in the synthesized absorbent were 23 -27 nm and 105.48 m 2 /g, respectively. At optimal pH4 and equilibrium time of 20 min, absorption efficiency increased with absorbent increase by 1 g/L and reduction in the initial concentration of nitrate ions (85.86±4.6). The results of adsorption equilibrium isotherms showed that nitrate absorption process follows the Langmuir isotherm (R 2 =0.924). Conclusion: The almond shell activated with iron nanoparticles has a good ability to remove nitrate ions from aqueous solutions. So, use of this relatively easy and simple technology is an effective step in removing nitr

Item Type: Article
Uncontrolled Keywords: Adsorption, Almond, Adsorption isotherm, Magnetite nanoparticles, Nitrate.
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
Faculty of Health > Department of Epidemiology
Depositing User: zahra bagheri .
Date Deposited: 14 Nov 2017 07:09
Last Modified: 23 Jul 2018 05:33
URI: http://eprints.skums.ac.ir/id/eprint/6359

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