کارايی نانوذرات فوتوکاتاليست تثبيت شده بر روی ميکروگلوله‌های شيشه‌ای در حذف سيانيد با نور خورشيد
Journal Title: آب و فاضلاب - Year 2016, Vol 27, Issue 6
Abstract
Cyanide Removal Efficiency of Photocatalytic Nanoparticles Stabilized on Glass Microbeads Under Sun Irradiation This paper investigates cyanide photodestruction (at pH 9) using the S, N-TiO2 photocatalyst synthesized by the sol-gel method and stabilized on glass microbeads. The main raw materials were thiourea, as a source of N and S, and tetra butyl ortho titanate. The effects of S and N doses, visible light (a 400W light), sunlight, irradiation time, and different initial cyanide concentrations (50, 100, 200, and 300 ppm) were studied on cyanide photodestruction. Cyanide concentration was measured by the titration method and the photocatalyst film was characterized by X-ray diffraction (XRD), UV-Vis diffuse reflection spectroscopy (DRS), Scanning Electron Microscopy (SEM), and Energy dispersive X-ray (EDX) analysis. XRD patterns and SEM images were used to determine the nanoparticle size of the photocatalyst on glass microbeads. EDX and DRS analyses confirmed the presence of S and N as well as the activity of the photocatalyst in the visible region, respectively. The S, N-TiO2 film with 0.25 g Thiuourea proved to be the best cyanide photodestruction agent in the visible light. Based on the results obtained, S, N-TiO2/ glass microbead was capable of destroying cyanide (50 ppm) by up to 94% in the visible light and by approximately 100% in the sunlight. The results also indicated that S, N-Tio2/scoria stone was capable of destroying cyanide by 85% in the visible light and by 94% in the sunlight within 4 h. The reaction kinetic for all cyanide concentrations and two photocatalyst substrates were described by a first order equation. Finally, it was concluded that the S, N-TiO2 stabilized on glass microbeads could be effectively used as a new method for treating wastewater containing free cyanide under the sunlight.
Authors and Affiliations
Neda Masoudipour, Mehraban Sadeghi, Mohsen Behpour, Fazel Mohammadi moghadam, Morteza Sadeghi
Keywords
Related Articles
- EP ID EP179108
- DOI -
- Views 103
- Downloads 0
Bogle, G. V., 1997, "Stream velocity profiles and longitudinal dispersion", Journal of Hydaulic Engineering, 123(9), 816-820. Huang, J., Weber, L. J., & Lai, Y.G., 2002, "Three-dimensional numerical study of flows in open-channel junctions", Journal of Hydraulic Engineering, 128(3), 268-280. Cope, R.C. & Hanks, R. W., 1972, "Transitional flow in isocceles transitional ducts", Ind. Eng. Chem. Fund,
Technical and Economic Evaluation of the Use of Variable Speed Pumps in the Backwashing of Rapid Sand Filters (A Case Study) S. Azodi1, M. Fazeli2 1. MSc Student of Civil and Water & Wastewater Engineering, Faculty o...
ارائه مدلي براي ارزيابي کيفيت عملکردي تصفيه‌خانه‌هاي آب A Model for Quantitative Performance Evaluation of Water Treatment Plants
Abstract Nowadays at the same time with population growth in urban areas, healthy potable water supply has become a challenge especially in arid and semi-aris countries who intend to fulfil a sustainable development. D...
کارايي نانولوله‌هاي کربني تک ديواره پوشيده شده با ذرات اکسيد روي در حذف آلاينده BTEX از محلول‌هاي آبي
Investigation of BTEX Removal from Aqueous Solution by Single Wall Carbon Nanotubes Coated with ZnO Monoaromatics of Benzene, Toluene, Ethyl Benzene and Xylene which are abbreviated as BTEX, are among the most important...
قيمت‌گذاري کارآمد آب شرب (مطالعه موردي شهر اراک)
Effective Drinking Water Pricing, A Case Study of Arak City Drinking water pricing is a major challenge facing the water and wastewater industry in Iran where decisions of water pricing are essentially based on social, l...
حذف تركيبات رنگزا از فاضلاب صنايع نساجي با استفاده از سيستم فتوالکتروکاتاليستي شامل الکترود فولاد زنگ‌نزن و گرافيت
Investigation of Dye Removal Efficiency of the Photoelectrocatalytic System Using Graphite and Stainless Steel as Electrodes Abstract The removal of Acid Orange 7 by the photoelectrocatalytic process was investigated a...