Statistical screening of hexavalent chromium biosorption by Sargassum
Publish Year: 1392
نوع سند: مقاله ژورنالی
زبان: English
View: 641
This Paper With 7 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_IJHSE-1-1_007
تاریخ نمایه سازی: 22 دی 1393
Abstract:
The aim of this study was to investigate the statistical screening of hexavalent chromium, Cr (VI), from an aqueous solution using brown seaweed Sargassum as a biosorbent. The biosorption process conditions were evaluated with the statistical screening followed by Plackett-Burman design. The effect of solution pH, contact time, initial chromium and nitrate concentrations were studied. The experimental data were fitted to the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. Plackett-Burman design showed the contact time and pH are the most important parameters influencing the Cr (VI) biosorption onto Sargassum. The optimum pH, contact time, the initial biosorbent dosage and initial Cr (VI) and nitrate concentration were found to be 3, 120 min, 1.3 g, 50 mg/L and 1000 mg/L, respectively. The results indicated that the Freundlich model was the most suitable for Cr (VI) biosorption onto Sargassum.
Keywords:
Authors
Hooshyar Hossini
Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
Abbas Rezaee
Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
Seyedomid Rastegar
Department of Environmental Health, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran