Olchowski Rafał, Zięba Emil, Giannakoudakis Dimitrios A, Anastopoulos Ioannis, Dobrowolski Ryszard, Barczak Mariusz
Department of Analytical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, 20-031 Lublin, Poland.
Confocal and Electron Microscopy Laboratory, Center for Interdisciplinary Research, John Paul II Catholic University of Lublin, Konstantynów Sq. 1J, 20-708 Lublin, Poland.
Materials (Basel). 2020 Apr 1;13(7):1625. doi: 10.3390/ma13071625.
Ordered mesoporous carbon (CMK-3), obtained from an abundant natural source, sugar, was thermochemically modified with dicyandiamide and thiourea as well as by classical oxidization with hydrogen peroxide to introduce specific surface groups. Thermochemical modifications resulted in carbon with almost unchanged porosity and altered surface chemistry while porosity of HO-treated carbon was seriously deteriorated. The obtained carbons were tested as sorbents of diclofenac, considered as one of the emerging water contaminants. Changes in porosity and surface chemistry of modified carbons resulted in significant differences with regard to the uptake of diclofenac. Dicyandiamide-modified carbon showed highest uptake of drugs, reaching 241 mg g that is attributed to its developed microporosity as well as surface chemistry composed of basic groups facilitating electrostatic interactions with diclofenac anions. Desorption study showed that diclofenac is strongly bonded, albeit with a different degree depending on the modification of the CMK-carbon. The obtained results were compared with up-to-date literature regarding sorption of diclofenac by carbon-based sorbents.
有序介孔碳（CMK-3）由丰富的天然来源——糖制得，通过用双氰胺和硫脲进行热化学改性以及用过氧化氢进行经典氧化处理来引入特定表面基团。热化学改性导致碳的孔隙率几乎不变但表面化学性质改变，而经过氧化氢处理的碳的孔隙率严重恶化。所制备的碳被用作双氯芬酸的吸附剂，双氯芬酸被视为一种新出现的水中污染物。改性碳的孔隙率和表面化学性质的变化导致其对双氯芬酸的吸附存在显著差异。双氰胺改性的碳对药物的吸附量最高，达到241 mg/g，这归因于其发达的微孔结构以及由碱性基团组成的表面化学性质，有利于与双氯芬酸阴离子发生静电相互作用。解吸研究表明，双氯芬酸结合牢固，不过根据CMK-碳的改性情况，结合程度有所不同。将所得结果与有关碳基吸附剂对双氯芬酸吸附的最新文献进行了比较。
