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非均相光催化技术处理废纸制浆废水的比较和优化

Comparison and Optimization of Different Heterogeneous Photo- Catalytic Oxidation Processes for Treating Wastepaper Pulp Effluents

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【作者】 徐美娟王启山孙晓明

【Author】 XU Mei-juan1,2,WANG Qi-shan2,SUN Xiao-ming1(1.College of Mechanical and Energy Engineering,Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China;2.College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China)

【机构】 浙江大学宁波理工学院机电与能源工程分院南开大学环境科学与工程学院

【摘要】 研究了不同非均相光催化工艺去除废纸制浆废水总有机碳(TOC)的效果,并对其进行比较和优化.结果表明,将均相和非均相光催化体系复合使用,可显著加快反应速度,提高处理效果.在针铁矿、赤铁矿、TiO2分别与FeSO4复合催化的不同体系中,经30 min光照后均可去除约57%的TOC.催化剂的晶体结构不同,光催化效果不同,3种催化剂的有效顺序为:针铁矿>赤铁矿>TiO2,与FeSO4复合后的顺序不变.针铁矿光催化反应和光解H2O2反应之间存在着很好的协同效应.非均相光催化反应可有效矿化小分子有机物,催化剂用量存在最佳饱和点,适当增加H2O2用量可有效提高处理效果.实验证明,光催化工艺可有效处理废纸制浆废水.

【Abstract】 The efficiencies of treatment of wastepaper pulp effluents by different heterogeneous photo-catalytic oxidation processes were studied with experiments,and their efficiencies were compared and optimized.In this studyi,t was proved that the efficiency of homogeneous-heterogeneous composite catalytic oxidation was better than those of homogeneous and heterogeneous catalytic oxidation.In all the three composite catalytic oxidation systems of FeSO4 with goethite,with hema-tite,and with TiO2,about 57% of total organic carbon(TOC) removal was obtained in just 30 min irradiation.Different crystal structures of catalyst led to different photo-catalytic oxidation efficiencies.As a result,the catalytic activity order of photo-catalytic oxidation systems for TOC removal was:goethite > hematite > TiO2,and their composite catalytic oxidation systems with FeSO4 had the same order.The goethite and H2O2 have coordinated effect for degrading organic compounds.Heterogeneous photo-catalytic oxidation processes were very effective for mineralization of small molecule compounds.There exists a best saturation value for the catalyst dosage.Increasing dosage of H2O2 within the saturation value is an advan-tage of increasing the TOC removal.Experimental results indicate that the photo-catalytic oxidation process is very effective for treating wastepaper pulp effluents.

【基金】 浙江大学宁波理工学院博士启动基金资助项目
  • 【文献出处】 天津大学学报 ,Journal of Tianjin University , 编辑部邮箱 ,2009年01期
  • 【分类号】X703.1
  • 【被引频次】6
  • 【下载频次】306
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