Radicals-catalyzed oxidation reactions for degradation of recalcitrant compounds from landfill leachate
Radicals-catalyzed oxidation reactions for degradation of recalcitrant compounds from landfill leachate
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DOI：
10.1016/j.cej.2006.07.006
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发表时间：
2006-12
影响因子：
15.1
通讯作者：
Tonni Agustiono. Kurniawan;W. Lo;G. Chan
中科院分区：
文献类型：
--
作者：
Tonni Agustiono. Kurniawan;W. Lo;G. Chan
本文综述了各种深度氧化技术对垃圾渗滤液的技术适用性和处理性能。特别关注臭氧化，无辐照的均相系统（Fe2+/H2O2, O3/H2O2）和辐照的均相系统（UV/O3, UV/H2O2, UV/O3/H2O2，光- fenton氧化）。评价了它们在应用中的优点和局限性。还阐述了OH自由基在促进氧化反应中的形成。介绍了pH、所需氧化剂剂量、渗滤液COD和NH3-N浓度特征以及处理性能等选定信息。从对167篇论文（1976-2005）的回顾中可以明显看出，没有一种单独的AOTs是普遍适用的或对渗滤液处理非常有效的。其中，臭氧氧化法和/或Fenton氧化法是研究最多、应用最广泛的处理渗滤液的技术。两种处理的COD去除率为40 ~ 89%，COD去除率为560 ~ 8894mg/L。采用Fenton氧化-混凝-絮凝联合工艺，COD去除率为69 ~ 90%，COD去除率为417 ~ 7400mg/L。活性污泥（AS）与Fenton氧化（COD: 7000mg/L）和/或AS与湿空气氧化（WAO） （COD: 4140mg/L）相结合，COD去除率几乎达到98%。一般而言，选择最合适的辅助污水处理系统处理渗滤液，须视乎渗滤液的特性、技术适用性和潜在限制因素、污水排放标准、成本效益、规管规定和长期环境影响。
This article reviews the technical applicability and the treatment performance of various advanced oxidation technologies (AOTs) for landfill leachate. A particular focus is given to ozonation, homogeneous systems without irradiation (Fe2+/H2O2, O3/H2O2) and homogeneous systems with irradiation (UV/O3, UV/H2O2, UV/O3/H2O2, photo-Fenton oxidation). Their advantages and limitations in application are evaluated. The formation of OH radicals in enhancing oxidation reactions is also elaborated. Selected information such as the pH, the dose of oxidants required, the characteristics of leachate in terms of COD and NH3-N concentration and treatment performance is presented. It is evident from a review of 167 papers (1976–2005) that none of the individual AOTs is universally applicable or highly effective for leachate treatment. Among the individual AOTs reviewed, ozonation and/or Fenton oxidation are the most frequently studied and widely applied for leachate treatment. Both treatments are effective for 40–89% of COD removal with its concentrations ranging from 560 to 8894mg/L. By combining the Fenton oxidation and coagulation–flocculation process, about 69–90% of COD removal with its concentrations ranging from 417 to 7400mg/L was achieved. An almost complete COD removal (98%) was attained by combining the activated sludge (AS) and the Fenton oxidation (COD: 7000mg/L) and/or the AS and wet air oxidation (WAO) (COD: 4140mg/L). In general, the selection of the most suitable AOT for leachate treatment depends on the leachate characteristics, technical applicability and potential constraints, effluent discharge standard, cost-effectiveness, regulatory requirements and long-term environmental impacts.