Abstract

The present study investigates the use of UV light and the ozone process for doxorubicin, daunorubicin, epirubicin, and irinotecan degradation. The process was carried out using different pH values in hospital wastewater. The use of UV radiation reduces the concentration of anticancer drugs, but in all cases, this technology was not able enough to remove on the whole these contaminants from hospital wastewater. The best condition was achieved when using pH 9 for most of the analytes. Doxorubicin, daunorubicin, and epirubicin were degraded at 97.3%, 88.3%, and 99.0%, respectively. Irinotecan showed the lowest degradation, just 55.6%; a slightly higher degradation (63.8%) was obtained when pH 5 was used. Complete removal of doxorubicin, daunorubicin, epirubicin, and irinotecan was achieved when ozone treatment was used for all the pH studied. The results indicated that UV light and the ozone process can be used as a tertiary treatment to reduce the concentration of anticancer drugs in the effluents. Ozonation, therefore, proved to be more efficient than the photolysis process, when considering the percentual degradation of the original compounds in shorter timespans.

摘要

本研究调查了使用紫外光和臭氧过程来降解阿霉素、柔红霉素、表柔比星和伊立替康。该过程是在医院废水中使用不同的 pH 值进行的。紫外线辐射的使用降低了抗癌药物的浓度，但在所有情况下，这项技术都不足以从医院废水中完全去除这些污染物。对大多数分析物使用 pH 9 时达到了最佳条件。阿霉素、柔红霉素和表柔比星的降解率分别为 97.3%、88.3% 和 99.0%。伊立替康的降解率最低，仅为 55.6%；当使用 pH 5 时，降解率略高（63.8%）。当臭氧处理用于所有研究的 pH 值时，可以完全去除多柔比星、柔红霉素、表柔比星和伊立替康。结果表明，紫外光和臭氧处理可作为三级处理来降低废水中抗癌药物的浓度。因此，当考虑到原始化合物在较短时间跨度内的百分比降解时，臭氧化被证明比光解过程更有效。