Leachate dissolved organic matter characterization using spectroscopic methods
Leachate dissolved organic matter characterization using spectroscopic methods
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DOI：
10.2166/wrd.2011.032
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发表时间：
2011-06
影响因子：
2.3
通讯作者：
Anika Yunus;D. Smallman;A. Stringfellow;R. Beaven;W. Powrie
中科院分区：
文献类型：
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作者：
Anika Yunus;D. Smallman;A. Stringfellow;R. Beaven;W. Powrie
采用紫外和荧光光谱法研究了垃圾渗滤液中溶解性有机物（DOM）的生物降解性变化。实验，以探讨好氧生物降解的渗滤液DOM进行了未经处理和处理的渗滤液样品收集两个英国城市固体废物填埋场，L1和L2。在好氧处理过程的不同阶段收集的渗滤液样品进行了表征的常规方法（化学需氧量（COD）和溶解有机碳含量（DOC）），也通过紫外光谱和荧光激发-发射矩阵。实验室规模的好氧处理系统实现了在所有的渗滤液中的COD和DOC的减少。紫外分光光度法测定结果表明，好氧生物降解过程中渗滤液的芳香性降低。此外，渗滤液的荧光强度下降到不同程度，这表明降解腐殖酸，富里酸或蛋白质类结构在生物降解过程中。初步结果表明，荧光DOC和荧光COD之间的关系很强，并建议这些相关性的强度可能是一个有用的工具，在区分来源和DOC的生物降解性便宜，快速，但需要进一步研究使用不同类型的渗滤液。
This study investigated the use of ultraviolet (UV) and fluorescence spectroscopy to monitor the changes in biodegradability of dissolved organic matter (DOM) in landfill leachates. Experiments to investigate aerobic biodegradation of leachate DOM were carried out using untreated and treated leachate samples collected from two UK municipal solid waste landfills, L1 and L2. Leachate samples collected at different stages of the aerobic treatment processes were characterized by conventional methods (chemical oxygen demand (COD) and dissolved organic carbon content (DOC)) and also by UV spectroscopy and fluorescence excitation-emission matrix. The laboratory-scale aerobic treatment system achieved reductions in COD and DOC in all of the leachates. Results obtained from UV spectrophotometry indicated that the aromatic character of the leachate decreased during aerobic biodegradation. Additionally, the fluorescence intensity of the leachates decreased to various extents, suggesting degradation of humic, fulvic or protein-like structures during biodegradation. Initial results showed strong relations between fluorescent DOC and fluorescent COD and suggest that the strength of these correlations could be a useful tool in distinguishing sources and biodegradability of DOC cheaply and quickly, although further research using different types of leachates is required.