Rusu Lăcrămioara, Grigoraș Cristina-Gabriela, Suceveanu Elena Mirela, Simion Andrei-Ionuț, Dediu Botezatu Andreea Veronica, Istrate Bogdan, Doroftei Ioan
Department of Chemical and Food Engineering, Faculty of Engineering, "Vasile Alecsandri" University of Bacău, 157 Calea Mărăşeşti, 600115 Bacău, Romania.
Department of Chemistry, Physics and Environment, Faculty of Sciences and Environment, "Dunărea de Jos" University of Galați, 111 Domnească Street, 800201 Galați, Romania.
Materials (Basel). 2021 Aug 25;14(17):4810. doi: 10.3390/ma14174810.
Pharmaceuticals and dyes are a very important part of the nonbiodegradable or hard biodegradable substances present in wastewater. Microorganisms are already known to be effective biosorbents, but the use of free microbial cells involves difficulties in their separation from effluents and limits their application in wastewater treatment. Thus, this study aimed to develop biosorbents by immobilizing , and residual biomass on natural polymers (alginate and chitosan) and to evaluate the biosorptive potential for removal of pharmaceuticals and dyes from water. Six types of biosorbents were synthesized and characterized by Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy techniques and their biosorptive capacities for three drugs (cephalexin, rifampicin, ethacridine lactate) and two dyes (orange II and indigo carmine) were evaluated. The obtained results show that the removal efficiency depends on the polymer type used for the immobilization. In case of alginate the removal efficiency is between 40.05% and 96.41% for drugs and between 27.83% and 58.29% for dyes, while in the case of chitosan it is between 40.83% and 77.92% for drugs and between 17.17% and 44.77% for dyes. In general, the synthesized biosorbents proved to be promising for the removal of drugs and dyes from aqueous solutions.
药物和染料是废水中存在的不可生物降解或难生物降解物质的重要组成部分。微生物已知是有效的生物吸附剂，但使用游离微生物细胞存在从废水中分离的困难，并限制了它们在废水处理中的应用。因此，本研究旨在通过将 、 和 残余生物质固定在天然聚合物（藻酸盐和壳聚糖）上来开发生物吸附剂，并评估其从水中去除药物和染料的生物吸附潜力。合成了六种类型的生物吸附剂，通过扫描电子显微镜和傅里叶变换红外光谱技术对其进行了表征，并评估了它们对三种药物（头孢氨苄、利福平、乳酸依沙吖啶）和两种染料（橙黄 II 和靛蓝胭脂红）的生物吸附能力。所得结果表明，去除效率取决于用于固定化的聚合物类型。对于藻酸盐，药物的去除效率在40.05%至96.41%之间，染料的去除效率在27.83%至58.29%之间，而对于壳聚糖，药物的去除效率在40.83%至77.92%之间，染料的去除效率在17.17%至44.77%之间。总体而言，合成的生物吸附剂被证明在从水溶液中去除药物和染料方面具有前景。
