Potassium persulfate promoted catalytic wet oxidation of fulvic acid as a model organic compound in landfill leachate with activated carbon
Potassium persulfate promoted catalytic wet oxidation of fulvic acid as a model organic compound in landfill leachate with activated carbon
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过硫酸钾用活性炭促进垃圾渗滤液中作为模型有机化合物的黄腐酸的催化湿式氧化
DOI：
10.1016/j.cej.2012.06.029
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发表时间：
2012-08
影响因子：
15.1
通讯作者：
Xi-Yan Xu, Guang-Ming Zeng*, Yan-Rong Peng*
中科院分区：
文献类型：
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作者：
Xi-Yan Xu, Guang-Ming Zeng*, Yan-Rong Peng*
富里酸（FA）是目前已知的高浓度的渗滤液从“成熟”和“老”垃圾填埋场。以活性炭（AC）为催化剂，过硫酸钾（K2S2O8）为促进剂，研究了以FA为模型的催化湿式氧化法（CWAO）处理稳定化垃圾渗滤液中难降解有机物的效果。考察了温度、AC和K2S2O8用量对FA降解的影响。结果表明，K2S2O8/AC体系能有效降解FA。在150 ° C和0.5MPa氧压下，经过4h的处理，FA几乎完全转化，COD去除率达到77.8%。COD/BOD_5比值由原水的0.13提高到CWAO后的0.95。AC在催化湿式氧化FA过程中表现出良好的稳定性。当AC第四次使用时，FA转化率仍在60%以上。此外，自由基机理进行了研究，并使用三种自由基清除剂（甲醇，叔丁醇，溴化钠），以确定在FA的降解参与的主要活性物种的种类。据推测，羟基自由基（OH）和硫酸根自由基（SO4-）在FA的降解中起主要作用。
Fulvic acid (FA) is known to be present at high concentration in leachates from “mature” and “old” landfills. In this work, the catalytic wet air oxidation (CWAO) of FA as a model of refractory organics of stabilized leachate was studied with activated carbon (AC) as catalyst and potassium persulfate (K2S2O8) as promoter. The effect of temperature and the amount of AC and K2S2O8on the degradation of FA were investigated. Results revealed that FA could be efficiently degraded in the K2S2O8/AC system. At 150°C and 0.5MPa oxygen pressure, almost complete FA conversion and 77.8% COD removal were achieved after 4h of treatment. The biodegradability of BOD5/COD ratio increased from 0.13 of raw FA solution to 0.95 after CWAO. AC exhibited good stability in the catalytic wet oxidation of FA. When AC was used for the fourth time, the FA conversion was still over 60%. Additionally, radical mechanism was studied and three radical scavengers (methanol, tert-butyl alcohol, sodium bromide) were used to determine the kind of major active species taking part in the degradation of FA. It was assumed that hydroxyl radical (OH) and sulfate radical (SO4-) played a major role in the FA degradation.
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影响因子：
13.6
作者：
T. Poznyak;G. Bautista;I. Chairez;R. Ivan Córdova;L. Rios
通讯作者：
T. Poznyak;G. Bautista;I. Chairez;R. Ivan Córdova;L. Rios
影响因子：
13.6
作者：
Oscar Primo;M. Rivero;I. Ortiz
通讯作者：
Oscar Primo;M. Rivero;I. Ortiz
DOI：
10.2166/wst.2006.853
发表时间：
2006-10
期刊：
Water science and technology : a journal of the International Association on Water Pollution Research
影响因子：
--
作者：
Y. Li;L. Liu;G. Huang;L. Zhu
通讯作者：
Y. Li;L. Liu;G. Huang;L. Zhu
影响因子：
6.9
作者：
Aimin Li;Minjuan Xu;Wenhui Li;Xuejun Wang;Jing-yu Dai
通讯作者：
Aimin Li;Minjuan Xu;Wenhui Li;Xuejun Wang;Jing-yu Dai
影响因子：
10.9
作者：
Rodriguez-Reinoso, F
通讯作者：
Rodriguez-Reinoso, F