title

مطالعه ایزوترم و کینتیک بر جذب نیترات بر روی آلومینا و پمیس اصلاح شده آهن

گلستانی فر, حافظ and اسدی, انور and علی نژاد, عبدالعظیم and هیبتی, بهزاد and وثوقی, مهدی (1394) مطالعه ایزوترم و کینتیک بر جذب نیترات بر روی آلومینا و پمیس اصلاح شده آهن. Desalination and Water Treatment ــ 57 (12). pp. 5480-5487. شاپا 1944-3994

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Title

Isotherm and kinetic studies on the adsorption of nitrate onto nanoalumina and iron-modified pumice

English Abstract

The use of nanoalumina and iron-modified pumice (IMP) as adsorbents for removal of nitrate from aqueous solution was investigated. Adsorption experiments were carried out as a function of the pH, contact time, and concentration of nitrate. Both adsorbents were effective for the nitrate removal in a pH range of 4–6, and optimum removal of nitrate ions occurred in a pH 5.0. The adsorption of nitrate on both adsorbents reached equilibrium within 50 min. Nitrate sorption kinetics was well fitted by pseudo-second-order model. The maximum nitrate uptake capacities for nanoalumina and IMP were found to be 70.8 and 86.7 mg g−1, respectively. The kinetic results showed that the nitrate sorption to nanoalumina and IMP followed pseudo-second-order kinetics with a correlation coefficient greater than 0.99. The equilibrium data for both the adsorbents for nitrate removal were fitted to Langmuir and Freundlich isotherms, but the experimental data were found to be little better fitted by the Langmuir model. These results indicate that nanoalumina and IMP are interesting alternatives for nitrate removal from the aqueous solution.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :حافظ گلستانی فر
نویسنده مسئول :انور اسدی
نویسنده :عبدالعظیم علی نژاد
نویسنده :بهزاد هیبتی
نویسنده :مهدی وثوقی
Additional Information:IF(2016): 1.631 Indexing in: ISI, Scopus, Google scholar
کلیدواژه ها (انگلیسی):Nanoalumina, Iron-modified Pumice, Nitrate removal, Adsorption isotherms, Kinetics
Subjects:WA Public Health > WA 30 Social, Economic, and Environmental factor in public health
WA Public Health > WA 30 Social, Economic, and Environmental factor in public health

WA Public Health
WA Public Health
Divisions:Faculty of Health > Department of Environmental health
ID Code:10851
Deposited By: دکتر مهدی وثوقی نیری
Deposited On:24 Apr 1398 12:17
Last Modified:24 Apr 1398 12:17

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