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

被引:0
作者
Zahra Rahmani
Majid Kermani
Mitra Gholami
Ahmad Jonidi Jafari
Niyaz Mohammad Mahmoodi
机构
[1] Tehran University of Medical Sciences,Department of Environmental Health Engineering, School of Public Health
[2] Tehran University of Medical Sciences,Department of Environmental Health Engineering, School of Public Health, Center for Water Quality Research (CWQR), Institute for Environmental Research (IER)
[3] Tarbiat Modares Univesity,Department of Environmental Health Engineering, School of Medical Sciences
[4] Institute for Color Science and Technology,Department of Environmental Research
来源
Iranian Journal of Environmental Health Science & Engineering | / 9卷
关键词
Basic violet 16; Decolorization; Hydroxyl radical; US/H; O; UV/H; O;
D O I
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学科分类号
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.
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