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首页> 外文期刊>Applied Surface Science >TiO2 assisted photo-oxidation of wastewater prior to voltammetric determination of trace metals: Eco-friendly alternative to traditional digestion methods
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TiO2 assisted photo-oxidation of wastewater prior to voltammetric determination of trace metals: Eco-friendly alternative to traditional digestion methods

机译：伏安法测定痕量金属之前，TiO2辅助废水的光氧化：传统消解方法的环保替代品

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Voltammetry is a sensitive method for metal determination and one alternative to ICP MS, but its limitation is the influence of the organic matrix on the measurements. To avoid those interferences, wet digestion with H2O2 accelerated with UV irradiation is applied and evaporation of excess of reagents is required. In this study, photolytic oxidation in quartz tubes with anatase was carried out, using as object of study wastewater samples with high amount of organic matter. Cadmium and lead determination was carried out in order to test metal recoveries. Lead recoveries reached c.a 85% for UV digestion with hydrogen peroxide, 98% for digestion with anatase immobilized with polyvinylidene fluoride (N-metylo-2-pirolidon) and c.a 103% for digestion with immobilized anatase (anatase in gum). The results obtained showed the usefulness of TiO2 layer as an oxidation medium. An easy, cheap and eco-friendly digestion method of surfactants without any reagent has been developed, with equal sensitivity but and the same detection limit of traditional digestion methods. (C) 2016 Elsevier B.V. All rights reserved.
机译：伏安法是一种用于金属测定的灵敏方法，是ICP MS的一种替代方法，但其局限性在于有机基质对测量的影响。为避免这些干扰，需要使用紫外线辐射加速的H2O2湿法消解，并且需要蒸发过量的试剂。在这项研究中，使用锐钛矿在石英管中进行光解氧化，以研究有机物含量高的废水样品为研究对象。为了测试金属的回收率，进行了镉和铅的测定。铅回收率约为85％，用过氧化氢进行紫外线消化，98％用于固定化聚偏二氟乙烯（N-间甲基-2-吡咯烷酮）的锐钛矿消化，约103％用于固定化锐钛矿（胶中的锐钛矿）消化。所得结果表明TiO2层作为氧化介质的有用性。已开发出一种简便，廉价且环保的表面活性剂消解方法，无需使用任何试剂，灵敏度相同，但检测限与传统消解方法相同。 （C）2016 Elsevier B.V.保留所有权利。

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