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Journal of Optoelectronical Nanostructures، جلد ۴، شماره ۳، صفحات ۷۳-۹۴
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| عنوان انگلیسی |
Thermodynamic study of (pb2+) removal by adsorption onto modified magnetic Graphene Oxide with Chitosan and Cysteine |
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| چکیده انگلیسی مقاله |
A new modified magnetic Graphene Oxide with Chitosan and Cysteine wassynthesized for removing Pb2+ ions from aqueous solution. The properties of thisadsorbent were characterized by Field Emission Scanning Electron Microscopy (FESEM),Vibrating Sample Magnetometer (VSM) and Energy Dispersive Analysis Systemof X-ray (EDAX). Physicochemical parameters such as effect of pH, contact time,adsorbent dosage and initial concentration of Pb 2+ was also studied. The results showedthat the maximum capacity of absorbent in Lead ions adsorption (at Equilibriumconcentration of 120 ppm) occurred at pHOptimum= 5.75, tOptimum= 30 min andadsorbent 85.4 mg/g dosage=0.1 gr. Maximum empirical adsorption capacity (qmax) wascalculated 85.4 mg/g. The thermodynamic parameters (ΔHᵒ, ΔGᵒ and ΔSᵒ) showed thatthe adsorption process of Pb 2+ on modified magnetic Graphene Oxide with Chitosanand Cysteine was endothermic and spontaneous. Removal percentage was reduced to15% after five stages of Sorption/desorption studies. So, modified magnetic GrapheneOxide with Chitosan and Cysteine can be used as a complementary process for removalof Pb2+ ions from water and wastewater. |
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| نویسندگان مقاله |
Ghazaleh Ramezani |
Department of Chemical Engineering, Marvdasht Branch, Islamic Azad
University,Marvdasht, Iran
Bizhan Honarvar |
Department of Chemical Engineering, Marvdasht Branch, Islamic Azad
University,Marvdasht, Iran
masoomeh emadi |
Department of Chemistry, Marvdasht Branch, Islamic Azad University, Marvdasht,
Iran
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| نشانی اینترنتی |
http://jopn.miau.ac.ir/article_3621_1da8da0a607c05a0ff18265b37266387.pdf |
| فایل مقاله |
اشکال در دسترسی به فایل - ./files/site1/rds_journals/1726/article-1726-1944242.pdf |
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| زبان مقاله منتشر شده |
en |
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