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选煤厂入洗原料煤管控措施探讨
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作者 秦岩 秦琳 《山东煤炭科技》 2008年第6期126-127,共2页
为保证入洗原料煤的质量、数量及验收结算工作的顺利进行,介绍了兴安选煤厂在入洗原料煤质、数量管理方面所采取的具体控制措施及取得的效果。
关键词 原料媒 配比入洗 煤质管理制度
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Kinetic Modeling of the Photocatalytic Reduction of Cr(VI) in the Presence of Dye Using Composite Photocatalyst
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作者 Kwena Yvonne Pete Maurice Stephen Onyango +1 位作者 Mika Sillanpaa Aoyi Ochieng 《Journal of Chemistry and Chemical Engineering》 2014年第9期918-924,共7页
The photocatalytic properties of surface TiO2 supported zeolite in a semi batch reactor for the reduction of Cr(VI) in the presence of methyl orange dye were investigated. The prepared composite photocatalyst was ch... The photocatalytic properties of surface TiO2 supported zeolite in a semi batch reactor for the reduction of Cr(VI) in the presence of methyl orange dye were investigated. The prepared composite photocatalyst was characterized by SEM-EDS (scanning electron microscopy and energy dispersive spectroscopy). The effects of operating parameters such as the pH and concentration of Cr(VI) in the absence and presence of dye were evaluated. The Cr(VI) reduction was more efficient in the ternary system (Cr(VI)/dye/TiO2-zeolite) than that of the corresponding binary system (Cr(VI)/TiO2-zeolite). The extent of metal reduction after 210 min of irradiation was 68% at pH = 3 for the ternary system. In order to optimize the effectiveness of the composite photocatalyst on the photocatalytic reduction of Cr(VI), kinetics and isotherm models were applied. The kinetics of Cr(VI) in the presence of dye on TiO2/zeolite composite photocatalyst followed the pseudo-first-order model while the equilibrium data correlated reasonably well with Freundlich isotherm. 展开更多
关键词 Composite photocatalyst Cr(VI) DYE KINETICS isotherm.
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