title

کاربرد نانوذره TiO2 غنی شده با نقره تهیه شده بوسیله روش فوتودپوزیشن برای حذف فتوکاتالیستی نیترات از محلول های آبی

پرستار, سعید and ناصری, سیمین and همتی برجی, سعیده and فضل زاده دویل, مهدی and محوی, امیرحسین and جوادی, امیرحسین and غلامی, میترا (1392) کاربرد نانوذره TiO2 غنی شده با نقره تهیه شده بوسیله روش فوتودپوزیشن برای حذف فتوکاتالیستی نیترات از محلول های آبی. Desalination and Water Treatment ــ 51 (37-39). pp. 7137-7144. شاپا 1944-3994

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Official URL: http://www.tandfonline.com/doi/full/10.1080/194439...


Title

Application of Ag-doped TiO2 nanoparticle prepared by photodeposition method for nitrate photocatalytic removal from aqueous solutions

English Abstract

Nitrate pollution in surface and groundwater resources is considered as an environmental challenge because of the potential risks of nitrate in diseases such as methemoglobinemia, lymphatic disturbances and blood cancer. On the other hand, nanomaterials have been recently applied for the control of water pollutants. The objective of this research was to investigate the efficiency of silver-doped TiO2 nanoparticles prepared by photodeposition method under UV irradiation for nitrate removal. Ag-doped TiO2 nanomaterials (Ag/Ti = 0.1 at %) were characterized by SEM-EDX, TEM, XRD and BET and used in doses of 0.1, 0.4, 0.8 and 1.2 g/L. Three nitrate concentrations of 20, 50 and 100 mg/l were considered in the pH range of 5-9. The effect of Ag-doped TiO2 nanoparticles both in dark and with UV irradiation was studied. Nitrite and ammonia, as intermediates of photocatalytic degradation of nitrate, were detected by spectrophotometeric method. Also, in the study, the effect of change in Ag percent doped on TiO¬2 under UV irradiation for nitrate removal was investigated. The effect of calcination temperature was surveyed on Ag-doped TiO2/UV process efficiency in nitrate removal from aqueous solutions. The optimum performance of nitrate removal (95.5%) was obtained with initial concentration of 100 mg/l and in acidic pH. Increase of Nanoparticle concentration up to 0.8 g/L, improved the removal efficiency, but 1.2 g/l of nanoparticles reduced the degradation efficiency. Maximum reduction performances without nanoparticles (with UV irradiation and in dark) were 32% and 23.3%, respectively. Optimal calcination temperature and optimal silver content doped on TiO2 was obtained 400 ˚C and 1%.

Item Type:Article
زبان سند : انگلیسی
نویسنده اول :سعید پرستار
نویسنده مسئول :سیمین ناصری
نویسنده :مهدی فضل زاده دویل
Additional Information: Impact Factor 2012: 0.852 Abstracting & indexing : Science Citation Index Expanded (Web of Science) , Current Contents , EBSCOhost , Elsevier BV , Scopus, OCLC , Ulrichsweb
کلیدواژه ها (انگلیسی):Nitrate removal ; Photocatalytic process ; Ag-doped TiO2 ; Photodeposition
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
Divisions:Faculty of Health > Department of Environmental health
ID Code:4106
Deposited By: MR Mahdi Fazlzadeh
Deposited On:09 Sep 1392 08:51
Last Modified:03 Apr 1393 07:08

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