Abstract

Water is one of the most important resource on the planet. Water pollution has become a global problem and have been identified various sources of pollution such as sewage discharge, industrial effluents and agricultural runoff and their potential has been studied in mass. From an environmental view, two approaches to dealing with water pollution are to reduce the sources and to treat the water to remove pollutants or convert them to forms that can be disposed of safely Advanced oxidation processes are widely studied for the treatment of toxic compounds; photocatalysis and radiolysis have been used in the treatment of persistent organic compounds. Radiocatalysis is a process analogous to heterogeneous photocatalysis wherein activation occurs through absorption of ionizing radiation rather than visible or ultraviolet photons. New and emerging pollutants present a new global water quality challenge with potentially-serious threats to human health and ecosystems. Pharmaceuticals, personal care products and endocrine disrupting compounds are among the prime examples of emerging contaminants. Diclofenac is a prevalent anti-inflammatory drug used throughout the world. Its frequent occurrence in freshwater environments and its potential toxicity towards several organisms such as fish and mussels makes diclofenac an emerging environmental contaminant. In this work, radiocatalysis was studied as advanced oxidation process for the degradation of diclofenac. For this, commercial titanium oxide was used as catalyst. The samples were exposed to gamma radiation using an irradiator, which is provided with a ⁶⁰Co source (gamma ray energies: 1.17 and 1.33 MeV). Some variations in conditions of irradiation (doses and ambient air) were used to determine their effect in process. The effect of adding the deposited catalyst on the degradation of diclofenac was observed and some differences in both processes, photocatalysis and radiocatalysis, were found.

中文翻译：

---

放射性催化降解双氯芬酸

摘要

水是地球上最重要的资源之一。水污染已成为一个全球性问题，已被确定为各种污染源，如污水排放、工业废水和农业径流，并已对其潜力进行了大规模研究。从环境的角度来看，处理水污染的两种方法是减少污染源和处理水以去除污染物或将其转化为可以安全处置的形式。高级氧化工艺被广泛研究用于处理有毒化合物；光催化和辐射分解已被用于处理持久性有机化合物。放射性催化是一种类似于多相光催化的过程，其中通过吸收电离辐射而不是可见光或紫外光子进行活化。新出现的污染物提出了新的全球水质挑战，对人类健康和生态系统构成潜在的严重威胁。药物、个人护理产品和内分泌干扰化合物是新兴污染物的主要例子。双氯芬酸是一种在世界范围内广泛使用的抗炎药。双氯芬酸在淡水环境中频繁出现，并且对鱼类和贻贝等多种生物具有潜在毒性，这使得双氯芬酸成为一种新兴的环境污染物。在这项工作中，放射性催化被研究为降解双氯芬酸的高级氧化过程。为此，使用商业氧化钛作为催化剂。使用辐照器将样品暴露在伽马辐射下，辐照器配有 个人护理产品和内分泌干扰化合物是新兴污染物的主要例子。双氯芬酸是一种在世界范围内广泛使用的抗炎药。双氯芬酸在淡水环境中频繁出现，并且对鱼类和贻贝等多种生物具有潜在毒性，这使得双氯芬酸成为一种新兴的环境污染物。在这项工作中，放射性催化被研究为降解双氯芬酸的高级氧化过程。为此，使用商业氧化钛作为催化剂。使用辐照器将样品暴露在伽马辐射下，辐照器配有 个人护理产品和内分泌干扰化合物是新兴污染物的主要例子。双氯芬酸是一种在世界范围内广泛使用的抗炎药。双氯芬酸在淡水环境中频繁出现，并且对鱼类和贻贝等多种生物具有潜在毒性，这使得双氯芬酸成为一种新兴的环境污染物。在这项工作中，放射性催化被研究为降解双氯芬酸的高级氧化过程。为此，使用商业氧化钛作为催化剂。使用辐照器将样品暴露在伽马辐射下，辐照器配有 双氯芬酸在淡水环境中频繁出现，并且对鱼类和贻贝等多种生物具有潜在毒性，这使得双氯芬酸成为一种新兴的环境污染物。在这项工作中，放射性催化被研究为降解双氯芬酸的高级氧化过程。为此，使用商业氧化钛作为催化剂。使用辐照器将样品暴露在伽马辐射下，辐照器配有 双氯芬酸在淡水环境中频繁出现，并且对鱼类和贻贝等多种生物具有潜在毒性，这使得双氯芬酸成为一种新兴的环境污染物。在这项工作中，放射性催化被研究为降解双氯芬酸的高级氧化过程。为此，使用商业氧化钛作为催化剂。使用辐照器将样品暴露在伽马辐射下，辐照器配有⁶⁰ Co 源（伽马射线能量：1.17 和 1.33 MeV）。辐照条件（剂量和环境空气）的一些变化被用来确定它们在过程中的影响。观察了添加沉积催化剂对双氯芬酸降解的影响，并发现光催化和放射性催化两种过程存在一些差异。