ABSTRACT An advanced oxidation system based on ozone, activated carbon and Portland cement was evaluated for the removal of the beta-lactam antibiotic Meropenem (emerging contaminant, EC). This system was validated with synthetic wastewater with characteristics similar to those of hospital wastewater. The total elimination of the antibiotic and a 90% reduction in the initial chemical oxygen demand (COD) associated with the EC were obtained. The acute toxicity of the water decreased 100% until becoming innocuous for the test microorganisms (E. coli and staphylococcus aureus). A new proposal for an oxidation index was presented which allowed finding a functional relationship between the process variables and the removal efficiency of the Meropenem antibiotic. The results of this investigation showed that the joint use of a pseudo-catalyst such as solid Portland cement (paste), activated carbon powder fixed to an inert glass matrix and ozone, improves the efficiency in the production of hydroxyl radicals when compared to other ozone-based technologies. This conclusion was demonstrated with the oxidation of a test compound (para-chlorobenzoic acid) that allowed determining the amount of hydroxyl radicals formed in the proposed system.

中文翻译：

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用于降解美罗培南抗生素的高级氧化技术（臭氧催化粉末活性炭 - 波特兰水泥）

摘要评估了基于臭氧、活性炭和波特兰水泥的高级氧化系统去除 β-内酰胺抗生素美罗培南（新兴污染物，EC）。该系统用合成废水进行了验证，其特征类似于医院废水。获得了抗生素的完全消除和与 EC 相关的初始化学需氧量 (COD) 减少 90%。水的急性毒性降低了 100%，直到对测试微生物（大肠杆菌和金黄色葡萄球菌）变得无害为止。提出了关于氧化指数的新提议，该提议允许找到工艺变量与美罗培南抗生素的去除效率之间的函数关系。这项调查的结果表明，与其他臭氧相比，联合使用假催化剂，如固体波特兰水泥（糊状物）、固定在惰性玻璃基质上的活性炭粉和臭氧，提高了产生羟基自由基的效率。基于技术。该结论通过测试化合物（对氯苯甲酸）的氧化得到证实，该氧化允许确定在建议系统中形成的羟基自由基的量。