共查询到19条相似文献,搜索用时 75 毫秒
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TiO2光催化氧化技术在废水处理中的应用 总被引:3,自引:0,他引:3
介绍TiO2光催化氧化反应机理,TiO2光催化氧化技术及其在处理染料废水、农药废水、含酚废水、表面活性剂废水、制药废水、含油废水、垃圾渗滤液中降解难降解有机污染物的应用,并对其目前存在的问题和研究方向进行了简单的阐述。 相似文献
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介绍了近年来二氧化钛可见光催化技术在水处理中的应用成果及现状.从二氧化钛光催化反应机理、催化反应类型、在水处理方面的应用,指出二氧化钛可见光催化技术与其他技术的独特之处,为实现其工业化生产和应用提供参考. 相似文献
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Dr. María Tomás-Gamasa Prof. José Luis Mascareñas 《Chembiochem : a European journal of chemical biology》2020,21(3):294-309
The conversion of sunlight into chemical energy by using photosynthetic machinery is at the heart of nature and life. Scientists have also learned to use light energy to promote a great variety of chemical reactions, most of which are based on redox processes involving electron-transfer steps. Indeed, the area of photoredox catalysis has recently emerged as one of the hottest fields in synthetic chemistry. Many of the photoredox reactions discovered so far take place in homogeneous phases, and rely on the use of soluble photoresponsive catalysts. However, in recent years, there have been many advances in the area of heterogeneous photocatalysis, most of which are based on the use of semiconductor materials, such as TiO2, as a key photocatalytic system. These technologies have found different applications, especially in the field of sustainable chemistry and therapy. Herein, some of these applications, and the potential of TiO2-based photocatalysts in biology and biomedicine, are reviewed. 相似文献
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The degradations of aliphatic carboxylic acids (formic acid, acetic acid, and propionic acid) were investigated by a combination of TiO2-based photocatalysis and ozonation at pH = 2. The carboxylic acids were analyzed by high-performance liquid chromatography (HPLC), while the mineralization process was characterized by measuring the dissolved organic carbon (DOC) content. The efficiency of heterogeneous photocatalysis combined with ozonation was compared with that of ozonation and that of heterogeneous photocatalysis alone. In all cases, the combined system proved most effective in the oxidation of carboxylic acids. The degradation of carboxylic acids was accompanied by a continuous decrease in the DOC content, and aldehydes and carboxylic acids containing one carbon atom less than the starting material were formed as intermediates. 相似文献
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提出了钛白粉生产过程中废酸和酸性废水的治理方案:清污分流,浓稀分治,分质处理,循环使用。经实践证明,这种方法投资少,处理效果良好,浓缩后废酸浓度可达到60%~65%,处理后废水中的SS和CO D指标完全优于国家排放标准。 相似文献
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二氧化钛光催化净化环境研究进展 总被引:1,自引:0,他引:1
光催化技术作为新兴技术,近几十年来在环境净化方面的运用得到了广泛研究。结合光催化技术原理及国内外研究进展,对近年来光催化在环境净化领域的研究进展阐述。包括处理废水中可生化性差的有机污染物,处理废气中的挥发性有机污染物,及基于光催化原理的抗菌材料研发、二氧化碳还原及土壤修复等环境净化方面的应用研究。 相似文献
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明胶生产废水及其治理 总被引:2,自引:0,他引:2
<正> 明胶生产工艺决定了明胶生产厂家既是用水大户,也是污染水环境的大户。据一些资料介绍,明胶生产的平均耗水量在1000~1500t/t明胶,有的厂家甚至高达≈2000t/t明胶,而其所排放的则是高钙、高有机物(主要是蛋白质,还有脂肪等)的高碱性的废水,治理难度极大。处理这样的污染物总量多、水量大的废水,企业必须具有并投入较多的资金来建立 相似文献