Effectiveness of photochemical and sonochemical processes in degradation of Basic Violet 16 (BV16) dye from aqueous solutions

Journal of Environmental Health Science Engineering

Niyaz Mohammad Mahmoodi³  Ahmad Jonidi Jafari²  Mitra Gholami⁴  Majid Kermani¹  Zahra Rahmani¹ 

[1] Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran;Department of Environmental Health Engineering, School of Medical Sciences, Tarbiat Modares Univesity, Tehran, Iran;Department of Environmental Research, Institute for Color Science and Technology, Tehran, Iran;Department of Environmental Health Engineering, School of Public Health, Center for Water Quality Research (CWQR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran

关键词: UV/H₂O₂;    US/H₂O₂;    Hydroxyl radical;    Decolorization;    Basic violet 16;   

Others  :  824062
DOI  :  10.1186/1735-2746-9-14

 received in 2012-11-14, accepted in 2012-11-18,  发布年份 2012

【 摘 要 】

In this study, degradation of Basic Violet 16 (BV16) by ultraviolet radiation (UV), ultrasonic irradiation (US), UV/H₂O₂ and US/H₂O₂ processes was investigated in a laboratory-scale batch photoreactor equipped with a 55W immersed-type low-pressure mercury vapor lamp and a sonoreactor with high frequency (130kHz) plate type transducer at 100W of acoustic power. The effects of initial dye concentration, concentration of H₂O₂ and solution pH and presence of Na₂SO₄ was studied on the sonochemical and photochemical destruction of BV16 in aqueous phase. The results indicated that in the UV/H₂O₂ and US/H₂O₂ systems, a sufficient amount of H₂O₂ was necessary, but a very high H₂O₂ concentration would inhibit the reaction rate. The optimum H₂O₂ concentration was achieved in the range of 17 mmol/L at dye concentration of 30 mg/L. A degradation of 99% was obtained with UV/H₂O₂ within 8 minutes while decolorization efficiency by using UV (23%), US (<6%) and US/H₂O₂(<15%) processes were negligible for this kind of dye. Pseudo-first order kinetics with respect to dyestuffs concentrations was found to fit all the experimental data.

【 授权许可】

   
2012 Rahmani et al.; licensee BioMed Central Ltd.

【 图 表 】

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