UV-TiO2 Photocatalytic Degradation of Landfill Leachate
UV-TiO2 Photocatalytic Degradation of Landfill Leachate
复制标题
UV-TiO2光催化降解垃圾渗滤液
DOI：
10.1007/s11270-010-0594-7
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
Qiaoyan Qin
中科院分区：
文献类型：
--
作者：
Chenzhong Jia;Yanxin Wang;Caixiang Zhang;Qiaoyan Qin
成熟的垃圾渗滤液中含有一些难以生物降解的大分子有机物质。光催化过程有助于提高垃圾渗滤液的生物降解性。采用批量实验确定了UV-TiO2光催化去除有机物的最佳条件。在最佳条件下，测定了化学需氧量（COD）、溶解有机碳（DOC）、生物需氧量（BOD）和色度的去除率。此外，采用气相色谱-质谱联用（GC/MS）分析光催化处理前后渗滤液中的有机物。实验结果表明，UV-TiO2光催化对COD、DOC和色度的去除率分别可达60%、70%和97%以上。在最佳条件下，生物需氧量（BOD）/化学需氧量（COD）比值从0.09提高到0.39，生物降解性得到显着改善。 GC/MS 分析显示，渗滤液中的 72 种有机污染物经过 72 小时处理后仍残留有 37 种。光催化过程中会产生酯类，而酮类、碳氢化合物、芳香烃、羟基苯和酸类在光催化氧化过程中更容易被降解。所提出的 UV-TiO2 光催化系统可能是垃圾渗滤液预处理的一种经济有效的方法。
Mature landfill leachate contains some macromolecular organic substances that are resistant to biodegradation. The photocatalytic process helps to enhance biodegradability of landfill leachate. Batch experiments were employed to determine the optimum conditions for removal of organic matter by UV-TiO2 photocatalysis. Under optimum conditions, the removal of chemical oxygen demand (COD), dissolved organic carbon (DOC), biological oxygen demand (BOD), and color was determined. Moreover, gas chromatography coupled with mass spectrometry (GC/MS) was used to analyze the organic matter in the treated leachate before and after treatment by the photocatalysis. The experimental results indicated that the removal of COD, DOC, and color by UV-TiO2 photocatalysis could reach above 60%, 70% and 97%, respectively. Under optimal conditions, the ratio of biological oxygen demand (BOD)/chemical oxygen demand (COD) was elevated from 0.09 to 0.39, representing substantial improvement in biodegradability. GC/MS analysis revealed that 37 out of 72 kinds of organic pollutants in the leachate remained after 72 h treatment. Esters were produced during photocatalytic process and ketones, hydrocarbons, aromatic hydrocarbons, hydroxybenzenes, and acids were easier to be degraded during photocatalytic oxidation processes. The UV-TiO2 photocatalysis systems proposed may be a cost-effective approach for pre-treatment of landfill leachate.
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DOI：
10.1007/s11270-009-9980-4
发表时间：
2009-01
期刊：
Water, Air, and Soil Pollution
影响因子：
--
作者：
Chih-Yu Chen
通讯作者：
Chih-Yu Chen
影响因子：
5.3
作者：
Herrmann, JM
通讯作者：
Herrmann, JM
影响因子：
13.6
作者：
Sheng H. Lin;C. D. Kiang
通讯作者：
Sheng H. Lin;C. D. Kiang
影响因子：
9
作者：
V. Sarria;P. Peringer;J. Cáceres;J. Blanco;S. Malato;C. Pulgarin
通讯作者：
V. Sarria;P. Peringer;J. Cáceres;J. Blanco;S. Malato;C. Pulgarin
DOI：
10.1016/s1010-6030(02)00329-5
发表时间：
2003-01
影响因子：
4.3
作者：
G. Alhakimi;Lisa Studnicki;M. Al-Ghazali
通讯作者：
G. Alhakimi;Lisa Studnicki;M. Al-Ghazali