Department of Radiochemistry and Environmental Chemistry, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, 20-031 Lublin, Poland.
Department of Advanced Energy Technologies, Częstochowa University of Technology, Dąbrowskiego 73, 42-201 Częstochowa, Poland.
Molecules. 2023 Aug 7;28(15):5919. doi: 10.3390/molecules28155919.
The increased application of drugs during the COVID-19 pandemic has resulted in their increased concentration in wastewater. Conventional wastewater treatment plants do not remove such pollutants effectively. Adsorption is a cheap, effective, and environmentally friendly method that can accomplish this. On the other hand, maintaining organic waste is required. Thus, in this study, plant waste-derived pelletized biochar obtained from different feedstock and pyrolyzed at 600 °C was applied for the adsorption of nitazoxanide, an antiparasitic drug used for the treatment of SARS-CoV-2. The adsorption was fast and enables one to remove the drug in one hour. The highest adsorption capacity was noted for biochar obtained from biogas production (14 mg/g). The process of NTZ adsorption was governed by chemisorption (k = 0.2371 g/mg min). The presence of inorganic ions had a detrimental effect on adsorption (Cl, NO in 20-30%) and carbonates were the most effective in hindering the process (60%). The environmentally relevant concentration of DOM (10 mg/L) did not affect the process. The model studies were supported by the results with a real wastewater effluent (15% reduction). Depending on the applied feedstock, various models described nitazoxanide adsorption onto tested biochars. In summary, the application of carbonaceous adsorbents in the pelletized form is effective in nitazoxanide adsorption.
在 COVID-19 大流行期间，药物的应用增加导致其在废水中的浓度增加。传统的废水处理厂不能有效地去除这些污染物。吸附是一种廉价、有效且环保的方法，可以达到这一目的。另一方面，需要保持有机废物。因此，在这项研究中，应用了不同原料在 600°C 下热解得到的、源自植物废物的颗粒状生物炭，用于吸附硝唑尼特，硝唑尼特是一种用于治疗 SARS-CoV-2 的驱虫药物。吸附速度很快，一小时内就能去除药物。从沼气生产中获得的生物炭的吸附容量最高（14mg/g）。NTZ 的吸附过程受化学吸附（k=0.2371g/mg min）控制。无机离子的存在对吸附有不利影响（Cl、NO 在 20-30%），而碳酸盐对该过程的抑制作用最强（60%）。环境相关浓度的 DOM（10mg/L）对过程没有影响。模型研究得到了实际废水的支持（减少了 15%）。根据所应用的原料，各种模型描述了硝唑尼特在测试生物炭上的吸附。总之，颗粒状碳质吸附剂在硝唑尼特吸附方面的应用是有效的。
