Braun A M, Pintori I G, Popp H P, Wakahata Y, Wörner M
Lehrstuhl für Umweltmesstechnik, Universität Karlsruhe, 76128 Karlsruhe, Germany.
Water Sci Technol. 2004;49(4):235-40.
Technical development work is presented, where the VUV photochemically induced oxidative degradation is used: (i) for analytic purposes, and (ii) for small to medium scale (< 10 m2/d) waste water treatment processes or ultrapure water production. In the first case, small Xe-excimer radiation sources with an integrated reaction space designed for optimal conditions, as far as incident photon flux density, turbulence and concentration of dissolved molecular oxygen are concerned, have been built and tested. Under conditions of exhaustive oxidation and/or mineralization of pollutants in a continuous regime, they may be used for sample pre-treatment modules prior TOC, TOX and electrochemical trace metal analysis. Under conditions of partial oxidation or mineralization, the same lamp/reactor combination may be used for functionalization purposes prior to e.g. GC or HPLC analyses. In the second case, mass transfer limitations between the non-irradiated bulk volume and the irradiated volume are overcome by the electrochemical generation of molecular oxygen within or close to the irradiated volume and by the design of the photochemical part of the reactor.
本文介绍了技术开发工作，其中真空紫外光化学诱导氧化降解用于：（i）分析目的，以及（ii）中小规模（<10平方米/天）的废水处理工艺或超纯水生产。在第一种情况下，已经制造并测试了小型氙准分子辐射源，其具有针对入射光子通量密度、湍流和溶解分子氧浓度设计的优化条件的集成反应空间。在连续模式下污染物完全氧化和/或矿化的条件下，它们可用于总有机碳（TOC）、总需氧量（TOX）和电化学痕量金属分析之前的样品预处理模块。在部分氧化或矿化的条件下，相同的灯/反应器组合可用于例如气相色谱（GC）或高效液相色谱（HPLC）分析之前的功能化目的。在第二种情况下，通过在辐照体积内或其附近电化学产生分子氧以及通过反应器光化学部分的设计，克服了未辐照主体体积与辐照体积之间的传质限制。
