Necmettin Erbakan University, Department of Environmental Engineering, Konya, Turkey.
Necmettin Erbakan University, Department of Environmental Engineering, Konya, Turkey.
Sci Total Environ. 2021 Aug 25;784:147174. doi: 10.1016/j.scitotenv.2021.147174. Epub 2021 Apr 18.
Psychological disorders due to the COVID-19 pandemic have increased the consumption of psychiatric pharmaceuticals on a global scale in last year. These compounds reach wastewater treatment plants (WWTP) through sewerage system and are not sufficiently removed by using conventional treatment process. Psychiatric drugs released with WWTP effluent may cause possible risks to the receiving aquatic environment. Also, two antidepressants have been included in the "watch list" in 2020. Therefore, simple and relatively cost effective removal of psychiatric drugs from wastewaters becomes important. Magnetite red mud nanoparticles (RM-NPs) synthesized was applied for the removal of psychiatric drugs (fluoxetine, paroxetine, carbamazepine, diazepam, and lorazepam) in WWTP effluent first time in this study. The adsorption of carbamazepine as a model compound was fitted well with pseudo-second-order kinetic model. The Freundlich isotherm model better represented the sorption data than the Langmuir model. High adsorption capacity (90.5 mg/g) was reached at 30 min contact time at pH 6.5-7.0 at 25 °C. The adsorption rate was described by the pseudo second order model and its rate control mechanism was controlled by film diffusion. The magnetite RM-NPs were efficiently used for the removal of carbamazepine from real WWTP effluents. The adsorption capacity and the magnetic separability of the regenerated magnetite RM-NPs were unaffected five cycles. Due to its simple application, low cost and high adsorption capacity, magnetite RM-NPs can be recommended as a better adsorbent comparing to commercial adsorbents to remove psychiatric drugs from WWTP effluents.
由于 COVID-19 大流行导致的心理障碍，去年在全球范围内增加了精神科药物的消费。这些化合物通过污水系统进入污水处理厂（WWTP），并且常规处理过程不能有效地去除它们。从 WWTP 流出物中释放的精神科药物可能会对接收的水生环境造成潜在风险。此外，两种抗抑郁药已在 2020 年被列入“观察名单”。因此，从废水中简单且相对经济高效地去除精神科药物变得尤为重要。本研究首次将合成的磁铁矿红泥纳米颗粒（RM-NPs）应用于 WWTP 废水中精神科药物（氟西汀、帕罗西汀、卡马西平、地西泮和劳拉西泮）的去除。作为模型化合物的卡马西平的吸附很好地符合伪二级动力学模型。与 Langmuir 模型相比，Freundlich 等温线模型更好地表示了吸附数据。在 25°C 时，pH 值为 6.5-7.0，接触时间为 30 分钟时，达到了 90.5mg/g 的高吸附容量。吸附速率由伪二级模型描述，其速率控制机制受膜扩散控制。磁铁矿 RM-NPs 有效地用于从实际 WWTP 废水中去除卡马西平。再生磁铁矿 RM-NPs 的吸附容量和磁分离性能在五个循环中没有受到影响。由于其简单的应用、低成本和高吸附容量，与商业吸附剂相比，磁铁矿 RM-NPs 可作为从 WWTP 废水中去除精神科药物的更好吸附剂。
