College of Environmental Science and Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, PR China.
J Hazard Mater. 2010 Aug 15;180(1-3):456-65. doi: 10.1016/j.jhazmat.2010.04.052. Epub 2010 Apr 18.
In this study, the Fenton process was found to be successful to treat landfill leachate rejected after reverses osmose treatment. Central composite design (CCD) and response surface method (RSM) were applied to evaluate and optimize the interactive effects of three operating variables, initial pH and dosages of H(2)O(2) and Fe(2+) on physical and oxidative performances of Fenton process. Six dependent parameters such as overall chemical oxygen demand (COD) removal, COD removals of oxidation and coagulation, mineralization, humic substances (HS) removal and sludge volume ratio (SVR) were either directly measured or calculated as responses. According to analysis of variances (ANOVA) results, six proposed models could be used to navigate the design space with high regression coefficient R(2) varied from 0.9489 to 0.9988. It was found that initial pH, H(2)O(2) and Fe(2+) dosage had significant effects on the overall COD removal, mineralization and HS removal due to their respective effects on the oxidation and coagulation removals. Synergies effect of oxidation and coagulation during Fenton process controlled the treatment. The visual search of overlaying critical response contours plot was demonstrated. The results indicated the optimum conditions to be 3.64 of initial pH, 100 mM of Fe(2+) and 240 mM of H(2)O(2) dosage, respectively. The experimental data and model predictions agreed well. The overall COD removal, COD removals of oxidation and coagulation, mineralization, HS removal and SVR of 71.81%, 46.22%, 25.80%, 63.81%, 91.53% and 3.50 ml/mM were demonstrated.
在这项研究中，芬顿工艺被发现可成功处理反渗透处理后的垃圾渗滤液。采用中心复合设计（CCD）和响应面法（RSM）评估和优化初始 pH 值、H2O2 和 Fe2+剂量三个操作变量对芬顿工艺物理和氧化性能的交互作用。总化学需氧量（COD）去除率、氧化和混凝 COD 去除率、矿化率、腐殖质（HS）去除率和污泥体积比（SVR）等六个依赖参数直接测量或计算为响应。根据方差分析（ANOVA）结果，六个提出的模型可用于在高回归系数 R2（0.9489 至 0.9988）范围内导航设计空间。发现初始 pH 值、H2O2 和 Fe2+剂量对总 COD 去除率、矿化率和 HS 去除率有显著影响，因为它们各自对氧化和混凝去除率有影响。芬顿工艺过程中氧化和混凝的协同作用控制着处理过程。重叠临界响应轮廓图的可视化搜索得到了验证。结果表明，最佳条件分别为初始 pH 值为 3.64、Fe2+剂量为 100mM 和 H2O2 剂量为 240mM。实验数据与模型预测吻合良好。总 COD 去除率、氧化和混凝 COD 去除率、矿化率、HS 去除率和 SVR 分别为 71.81%、46.22%、25.80%、63.81%和 91.53%。
