Absorbable organic halogens (AOX) are a global parameter which refers to a group of chemical compounds that contain one or more chlorine, bromine or iodine atoms in their molecule and can easily adsorb on activated carbon. The global concern related to the occurrence of the AOX compounds in the environment is due to their toxic and mutagenic effects on aquatic organisms and their potential role as inhibitors of microorganism growth, even at AOX low concentrations. The purpose of this study was to analyze the presence, occurrence and composition of absorbable organic halogens in wastewater and sewage sludge. In addition, their genotoxicity effect on the environment was tested on a bacterial biological model. Daily mass loading, mass emission and fate of AOX parameter were investigated in two wastewater treatment plants (wastewater and sewage sludge samples) from Romania, Galati and Iasi. Their AOX daily mass loadings (151 and 55.4 g/day/1000people) and mass emissions into the environment (47.8 and 23.5 g/day/1000 people) for both locations were correlated with the concentration level of volatile organic compounds, chlorophenols, organochlorine pesticides and polychlorinated biphenyls from both wastewater and sewage sludge, respectively. Concentration levels of detected halogenated organic compounds (regulated by current standards) accounted only for a small percentage (3.70–14.5%) from the total AOX amount. An exception was observed in the case of dehydrated sludge samples where the identified compounds accounted for 80% of the AOX content from Iasi WWTP and 53% for Galati. Evaluating the genotoxic activity of AOX in sludge samples showed that genotoxicity was not induced up to 100 µg/mL dehydrated sludge.

可吸收有机卤素（AOX）是一个全局参数，它是指一组化合物，其分子中含有一个或多个氯、溴或碘原子，并且很容易吸附在活性炭上。全球对环境中存在 AOX 化合物的关注是由于它们对水生生物的毒性和诱变作用以及它们作为微生物生长抑制剂的潜在作用，即使在 AOX 浓度较低的情况下也是如此。本研究的目的是分析废水和污水污泥中可吸收有机卤素的存在、发生和组成。此外，在细菌生物学模型上测试了它们对环境的遗传毒性影响。每日质量加载，在罗马尼亚加拉蒂和雅西的两个废水处理厂（废水和污水污泥样品）中研究了 AOX 参数的质量排放和归宿。两个地点的 AOX 每日质量负荷（151 和 55.4 克/天/1000 人）和向环境中的大量排放（47.8 和 23.5 克/天/1000 人）与挥发性有机化合物、氯酚、有机氯农药的浓度水平相关分别来自废水和污水污泥中的多氯联苯。检测到的卤化有机化合物的浓度水平（由现行标准规定）仅占 AOX 总量的一小部分（3.70-14.5%）。在脱水污泥样品的情况下观察到一个例外，其中确定的化合物占 Iasi 污水处理厂 AOX 含量的 80%，而 Galati 占 53%。评估污泥样品中 AOX 的遗传毒性活性表明，在 100 µg/mL 脱水污泥中不会诱导遗传毒性。