因子设计法优化掺硼金刚石电催化降解染料废水

Electrocatalytic degradation of dye wastewater on boron-doped diamond using factorial design methodology

掺硼金刚石电催化工艺(BDD工艺)作为当前热门的水处理技术,已被成功用于降解多种有机污染物。采用因子设计方法,考查了BDD工艺对偶氮染料金橙-Ⅱ的降解效能。实验选用染料初始浓度、反应时间、电解质浓度、施加电流和流速作为操作参数,并以脱色率作为响应指标来评估各参数的统计学显著性。在考察的5个因素中,前两者对于处理效果具有最为显著的影响。为此,在高因子水平情况下又进一步分析了它们的主效应和相互效应,同时构造了回归模型。实验结果表明,因子设计法对于优化BDD工艺是非常适用的,并显示了其实际应用的前景。

As an attractive technique of water treatment,the electrocatalytic technology concerning boron-doped diamond（BDD） technology has been successfully applied to the degradation of various organic pollutants.The removal efficiency of an azonic dye（Orange-Ⅱ） was investigated using BDD technology.A factorial design methodology was implemented to evaluate the statistically important operating parameters,among initial dye concentration,treatment time,electrolyte concentration,applied current and flow rate,on treatment efficiency;the latter was assessed in terms of color removal rate.Of the five parameters tested,the first two had a considerable effect on the treatment performance.Hence,analysis was repeated under more intense conditions to study their main and interaction effects,as well as to construct a regression model.As a result,the factorial design methodology was proved to be very suitable in optimizing the BDD technology,thus showing great promise for real applications.