Murray Christine A, Parsons Simon A
School of Water Sciences, Cranfield University, Cranfield, Bedfordshire, MK43 0AL, UK.
Chemosphere. 2004 Feb;54(7):1017-23. doi: 10.1016/j.chemosphere.2003.08.040.
The control of disinfection by-products during water treatment is primarily undertaken by reducing the levels of precursor species prior to chlorination. As many waters contain natural organic matter at levels of up to 15 mgl(-1) there is a need for a range of control methods to support conventional coagulation. Two such processes are the Fenton and photo-Fenton's processes and in this paper they are assessed for their potential to remove NOM from organic rich waters. The performance of both processes is shown to be depentent on pH, Fe: H2O2 ratio as well as Fe2+ dose. Under optimum conditions both processes achieved greater than 90% removal of DOC and UV254 absorbance. This removal lead to the trihalomethane formation potential of the water being reduced from 140 to below 10 microgl(-1), well below UK and US standards.
水处理过程中消毒副产物的控制主要是通过在氯化之前降低前驱体物质的含量来实现的。由于许多水体中天然有机物的含量高达15mg/L，因此需要一系列控制方法来辅助传统的混凝过程。芬顿法和光芬顿法就是这样的两种工艺，本文对它们从富含有机物的水体中去除天然有机物的潜力进行了评估。结果表明，这两种工艺的性能都取决于pH值、铁与过氧化氢的比例以及亚铁离子的剂量。在最佳条件下，两种工艺对溶解性有机碳（DOC）和UV254吸光度的去除率均超过90%。这种去除使得水的三卤甲烷生成潜能从140μg/L降低至10μg/L以下，远低于英国和美国的标准。
