Catalkaya Ebru Cokay, Kargi Fikret
Department of Environmental Engineering, Dokuz Eylul University, Buca, Izmir, Turkey.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2009 May;44(6):630-8. doi: 10.1080/10934520902784724.
Removal of diuron from aqueous solution by peroxone (hydrogen peroxide/ozone) oxidation was investigated using Box-Behnken statistical experiment design and the response surface methodology (RSM). Effects of diuron, H(2)O(2) concentrations and initial pH on the extent of diuron, total organic carbon (TOC) and adsorbable organic halogen (AOX) removals were investigated. Ozone dose was kept constant at 45 mg min(-1). Optimum reagent doses yielding the highest diuron, TOC and AOX removals were also determined. Hydrogen peroxide dose and pH were the most effective parameters for pesticide removal while hydrogen peroxide dose had the most significant effect on AOX removal (dehalogenation). All parameters affected mineralization (TOC removal) of diuron. Nearly complete removal of diuron was achieved within 5 minutes, while complete mineralization and dehalogenation were not achieved even within 60 minutes at high diuron doses indicating formation of some intermediate products. The optimal H(2)O(2)/pH/diuron ratio resulting in the maximum pesticide (100%), TOC (82%) and AOX (95%) removal was found to be 340/8/10.
采用Box-Behnken统计实验设计和响应面方法（RSM）研究了过氧酮（过氧化氢/臭氧）氧化法从水溶液中去除敌草隆的效果。研究了敌草隆、过氧化氢浓度和初始pH值对敌草隆去除率、总有机碳（TOC）和可吸附有机卤素（AOX）去除率的影响。臭氧剂量保持恒定在45 mg min⁻¹。还确定了实现敌草隆、TOC和AOX去除率最高的最佳试剂剂量。过氧化氢剂量和pH值是去除农药最有效的参数，而过氧化氢剂量对AOX去除（脱卤）影响最为显著。所有参数均影响敌草隆的矿化（TOC去除）。在5分钟内几乎完全去除了敌草隆，而在高敌草隆剂量下，即使在60分钟内也未实现完全矿化和脱卤，这表明形成了一些中间产物。导致农药（100%）、TOC（82%）和AOX（95%）去除率最高的最佳过氧化氢/ pH/敌草隆比例为340/8/10。
