Hilles Ahmed H, Abu Amr Salem S, Hussein Rim A, Arafa Anwar I, El-Sebaie Olfat D
Department of Environmental Health, High Institute of Public Health, Alexandria University, Alexandria, Egypt; Environmental Quality Authority, Gaza, Gaza Strip, Palestine.
Malaysian Institute of Chemical and Bio Engineering Technology, Universiti Kuala Lumpur, (UNIKL, MICET), Melaka, Malaysia E-mail:
Water Sci Technol. 2016;73(1):102-12. doi: 10.2166/wst.2015.468.
The objective of this study was to investigate the performance of employing H2O2 reagent in persulfate activation to treat stabilized landfill leachate. A central composite design (CCD) with response surface methodology (RSM) was applied to evaluate the relationships between operating variables, such as persulfate and H2O2 dosages, pH, and reaction time, to identify the optimum operating conditions. Quadratic models for the following two responses proved to be significant with very low probabilities (<0.0001): chemical oxygen demand (COD) and NH3-N removal. The obtained optimum conditions included a reaction time of 116 min, 4.97 g S2O8(2-), 7.29 g H2O2 dosage and pH 11. The experimental results were corresponding well with predicted models (COD and NH3-N removal rates of 81% and 83%, respectively). The results obtained in the stabilized leachate treatment were compared with those from other treatment processes, such as persulfate only and H2O2 only, to evaluate its effectiveness. The combined method (i.e., /S2O8(2-)/H2O2) achieved higher removal efficiencies for COD and NH3-N compared with other studied applications.
本研究的目的是考察采用过氧化氢试剂活化过硫酸盐处理稳定化垃圾渗滤液的效果。采用中心复合设计（CCD）和响应面方法（RSM）来评估过硫酸盐和过氧化氢剂量、pH值以及反应时间等操作变量之间的关系，以确定最佳操作条件。对于化学需氧量（COD）和氨氮（NH₃-N）去除这两个响应的二次模型，其概率非常低（<0.0001），证明具有显著性。获得的最佳条件包括反应时间116分钟、4.97克过二硫酸盐（S₂O₈²⁻）、7.29克过氧化氢剂量以及pH值11。实验结果与预测模型吻合良好（COD和NH₃-N去除率分别为81%和83%）。将稳定化渗滤液处理中获得的结果与其他处理工艺（如仅用过硫酸盐和仅用过氧化氢）的结果进行比较，以评估其有效性。与其他研究的应用相比，联合方法（即/S₂O₈²⁻/H₂O₂）对COD和NH₃-N实现了更高的去除效率。
