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Study on Treating Organic Waste-water by Photoelectrocatalytic Oxidation Pillared Clay Mineral Materials

Author: ShiTiaoXia
Tutor: SunJiaShou
School: Wuhan Institute of Technology
Course: Environmental Engineering
Keywords: Light irradiation Electro-oxidation Photocatalyticoxidating Ti / Fe pillared rectorite Nitrobenzene Wastewater Nitrobenzene removal rate COD removal efficiency
CLC: X703
Type: Master's thesis
Year: 2006
Downloads: 15
Quote: 0
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Abstract


In this paper, for the purpose of development and utilization of rectorite resources . Around the pillared rectorite preparation and application of a series of research work . Provide a scientific basis for the development and utilization of rectorite and rectorite processing wastewater containing nitrobenzene . 1 , according to the characteristics of the clay minerals , doped with transition metal ions , on the basis of summarizing existing research , respectively, discussed molding Rectorite and doped with transition metal molding rectorite preparation methods and influencing factors , prepared Ti / Fe the pillared rectorite environment material . 2 , before and after Ti / Fe pillared rectorite were infrared absorption spectroscopy ( FTIR ) , X - ray powder diffraction (XRD), BET , differential thermal analysis (DTA) and scanning electron microscopy (STEM ). The results show that the Ti / Fe pillared tired rectorite and rectorite sodium . , Ti pillared rectorite compared d its 001 values ??increased 1.83nm 0.47nm about pillared after rectorite thermal stability is greatly enhanced and rich in hydroxyl . 3 , the study shows that in the optical, electrical and photoelectric catalytic oxidation conditions , the impact of the Ti / Fe the pillared rectorite processing wastewater containing nitrobenzene factors : the initial concentration of the wastewater , pH value , Ti / Fe pillared tired rectorite dosage, reaction time , and so on. Compare Ti / Fe pillared rectorite deal with the effects of simulated wastewater containing nitrobenzene found that light irradiation , the electro-oxidation photoelectric catalytic oxidation can improve the Ti / Fe pillared rectorite ability to handle wastewater containing nitrobenzene . And photoelectric catalytic oxidation capacity > light irradiation oxidation capacity > electro-oxidation capacity . Ti / Fe pillared rectorite regeneration initial exploration , discovered by calcination at 500 ℃ for 1h able to recover its catalytic performance , better regeneration . 5 , light irradiation , electro-oxidation , photoelectrocatalysis Ti / Fe pillared rectorite processing wastewater containing nitrobenzene , nitrobenzene , COD removal of kinetic equations are in line with the first order kinetic equation . The dynamics study results show that the overall reaction rate is determined by internal diffusion .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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