School of Civil Engineering, Universiti Sains Malaysia, Nibong Tebal, Penang, Malaysia.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2010;45(6):692-8. doi: 10.1080/10934521003648883.
This study evaluated the effectiveness of Fenton's technique for the treatment of semi-aerobic landfill leachate collected from Pulau Burung Landfill Site (PBLS), Penang, Malaysia. The Fe2+ or Fe3+ as catalyst and H2O2 as oxidizing agent are commonly used for the classical Fenton's reaction. In present study, the effect of operating conditions such as pH, reaction time, molar ratio, agitation rate, feeding mode and Fenton reagent concentrations which are important parameters that affect the removal efficiencies of Fenton method were investigated. Under the most favorable conditions, the highest removals of 58.1 and 78.3% were observed for COD and color, respectively. In general, the best operating conditions were pH = 3, Fe = 560 mg L(-1), H2O2 = 1020 mg L(-1), H2O2/Fe2+ molar ratio = 3, agitation rate = 400 rpm and reaction time = 120 minutes. The results highlighted that stepwise addition of Fenton's reagent was more effective than adding the entire volume in a single step. Excessive hydrogen peroxide and iron have shown scavenging effects on hydroxyl radicals and reduced degradation of refractory organics in the landfill leachate.
本研究评估了芬顿技术处理从马来西亚槟城鸟屿垃圾填埋场收集的半好氧垃圾渗滤液的效果。Fe2+或 Fe3+作为催化剂，H2O2 作为氧化剂，常用于经典芬顿反应。在本研究中，考察了操作条件的影响，如 pH 值、反应时间、摩尔比、搅拌速度、进料方式和芬顿试剂浓度等，这些是影响芬顿法去除效率的重要参数。在最有利的条件下，COD 和色度的去除率最高分别达到 58.1%和 78.3%。一般来说，最佳操作条件为 pH = 3、Fe = 560 mg L(-1)、H2O2 = 1020 mg L(-1)、H2O2/Fe2+摩尔比 = 3、搅拌速度 = 400 rpm 和反应时间 = 120 分钟。结果表明，分步添加芬顿试剂比一次性添加全部体积更有效。过量的过氧化氢和铁对羟基自由基有清除作用，减少了垃圾渗滤液中难降解有机物的降解。
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