The Experimental Research on Treatment of Cr (VI) -Containing Wastewater by N-Doped Nano-TiO2

Shu Qin Wang; Ding Lin Zhang

doi:10.4028/www.scientific.net/AMR.610-613.1497

Paper Titles

The Experimental Study of the Traditional Chinese Medicine Wastewater Treatment by Microwave-Fenton
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Isolation and Characterization of Aerobic Denitrifying Bacteria
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Study on Municipal Wastewater Treatment by a Submerged Membrane Bioreactor
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Effect of Operation Conditions on Performance of Treating Actual Domestic Wastewater Bioreactor at Ambient Temperature
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The Experimental Research on Treatment of Cr (VI) -Containing Wastewater by N-Doped Nano-TiO₂
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The Emission Performance Research and Analysis of Diesel Engine Fueled with Biodiesel Hybrid Fuel
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Application of Porous Ceramic Filtration on Ballast Water Treatment
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A Research on the Activated Sludge Acclimation
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Study on the Polyaspartic Acid Derivative Synthesis and the Scale Inhibition Performance of Calcium Carbonate
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The Experimental Research on Treatment of Cr (VI) -Containing Wastewater by N-Doped Nano-TiO₂

Abstract:

N-doping TiO₂ was prepared by sol-gel method. The XRD, BET and UV techniques were used to characterize the crystalline structure.The photocatalytic effects of Cr (VI) were studied with the fluorescence lamp illumination. The visible light-induced photocatalytic reduction mechanisms of Cr (VI) were discussed. The results showed that N-doping nano-TiO₂ increased the visible-light responsive photocatalytic activity because of the increase of the surface area and decrease the band gap. There are the optima of the dosage and pHvalue. The removal efficiency of Cr (VI) was greater than 95% when the doping amount of N was 28%, dosage was 1.5g and pH was 2.5. The photocatalytic reactions of Cr (VI) included two parts─adsorption and reduction which was the rate-controlling step. The results provide some references for the Cr (VI) control and further application of TiO2.