Yoon J, Lee Y, Kim S
School of Chemical Engineering, College of Engineering, Seoul National University, Shinlim-dong, Kwanak-gu, Korea.
Water Sci Technol. 2001;44(5):15-21.
Abstract Fenton reaction has been often used to treat industrial wastewater or landfill leachate. However, most mechanistic research into the Fenton reaction has been confined to low concentration conditions (usually the concentration of iron is less than 1 mM). These conditions are removed from the circumstances of real application. This is especially true in the treatment of landfill leachate in Korea. Therefore, we investigated the characteristics of the Fenton system using high concentrations of iron (mostly [Fe2+] = 1 approximately 10 mM, [H2O2] = 5 mM, [Organic (t-BuOH or methanol)] = 0 or 30 mM) and interpreted the results from the known reaction mechanisms of the Fenton system. As a result, the use of high ferrous ion (> or = 1 mM) is believed to be appropriate for producing large quantities of OH. within a short period of time, causing fast consumption of hydrogen peroxide. However, OH. scavenging by the ferrous ion, the changes of oxidation products due to the oxygen depleted conditions, and the precipitation effect of ferric ion must be considered for the successful application of Fenton reaction. On the other hand, in low ferrous ion (<1 mM), it is important to utilize the redox cycles of iron in an effective manner.
摘要 芬顿反应常用于处理工业废水或垃圾渗滤液。然而，大多数关于芬顿反应的机理研究都局限于低浓度条件（通常铁的浓度小于1 mM）。这些条件与实际应用情况不符。在韩国处理垃圾渗滤液的情况尤其如此。因此，我们研究了使用高浓度铁（主要是[Fe2+]=1至10 mM，[H2O2]=5 mM，[有机物（叔丁醇或甲醇）]=0或30 mM）时芬顿体系的特性，并根据芬顿体系已知的反应机理对结果进行了解释。结果表明，使用高铁离子（≥1 mM）被认为适合在短时间内产生大量的·OH，导致过氧化氢快速消耗。然而，为了芬顿反应的成功应用，必须考虑亚铁离子对·OH的清除作用、缺氧条件下氧化产物的变化以及铁离子的沉淀效应。另一方面，在低亚铁离子（<1 mM）情况下，有效利用铁的氧化还原循环很重要。
