Bernárdez-Rodas Nuria, Rosales Emilio, Pazos Marta, González-Prieto Óscar, Torres Luis Ortiz, Sanromán M Ángeles
CINTECX, Bioengineering and Sustainable Processes Group, Chemical Engineering Department, Universidade de Vigo, Campus Lagoas-Marcosende, 36310 Vigo, Spain.
Hydro-Forestry Geomodeling Research Group, School of Forestry Engineering, University of Vigo, 36005 Pontevedra, Spain.
Molecules. 2025 Mar 24;30(7):1435. doi: 10.3390/molecules30071435.
The adsorption capacity of a biochar (BC) obtained from pine wood residues was evaluated for its ability to remove two pharmaceuticals: fluoxetine (FLX) and sulfamethizole (SMZ). The material showed promising results in FLX removal, but a limited capacity in the case of SMZ. In order to improve these results, BC surface modifications were made by doping with nitrogen, as well as using acid, basic and electrochemical treatments. A three-dimensional electrosorption treatment proved to be the most effective, increasing the adsorption rate from 0.45 to 13.46 mg/g after evaluating different operating conditions, such as the electrodes used or the BC dosage. Consecutive cycles of BC use were performed through desorption and electro-regeneration techniques to test its capacity for reuse, and it was observed that application in the 25 mA electric field increased the useful life of the material. Finally, the effect of ionic strength was studied, highlighting that the presence of ions did not significantly affect the efficiency of SMZ removal, although a slight increase was observed at a high ion concentration, probably due to a salinization effect.
评估了从松木残渣中获得的生物炭（BC）对两种药物：氟西汀（FLX）和磺胺甲噻二唑（SMZ）的吸附能力。该材料在去除FLX方面显示出有前景的结果，但对SMZ的吸附能力有限。为了改善这些结果，通过氮掺杂以及使用酸、碱和电化学处理对BC表面进行了改性。经过评估不同操作条件（如所用电极或BC用量）后，三维电吸附处理被证明是最有效的，将吸附速率从0.45提高到了13.46 mg/g。通过解吸和电再生技术对BC进行连续循环使用测试其再利用能力，观察到在25 mA电场中应用可提高材料的使用寿命。最后，研究了离子强度的影响，突出表明离子的存在对SMZ去除效率没有显著影响，尽管在高离子浓度下观察到略有增加，这可能是由于盐析效应。
