Cavalcante Edmo H M, Candido Iuri C M, de Oliveira Helinando P, Silveira Kamilla Barreto, Víctor de Souza Álvares Thiago, Lima Eder C, Thyrel Mikael, Larsson Sylvia H, Simões Dos Reis Glaydson
Institute of Materials Science, Federal University of Sao Francisco Valley, Juazeiro 48920-310, BA, Brazil.
Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, Porto Alegre 9500, Rio Grande do Sul, Brazil.
ACS Omega. 2022 May 23;7(22):18997-19009. doi: 10.1021/acsomega.2c02101. eCollection 2022 Jun 7.
A biomass amino silica-functionalized material was successfully prepared by a simple sol-gel method. 3-Aminopropyltriethoxysilane (APTES) was added to a tannin-rich grape residue to improve its physicochemical properties and enhance the adsorption performance. The APTES functionalization led to significant changes in the material's characteristics. The functionalized material was efficiently applied in the removal of methyl orange (MO) due to its unique characteristics, such as an abundance of functional groups on its surface. The adsorption process suggests that the electrostatic interactions were the main acting mechanism of the MO dye removal, although other interactions can also take place. The functionalized biomass achieved a very high MO dye maximum adsorption capacity ( ) of 361.8 mg g. The temperature positively affected the MO removal, and the thermodynamic studies indicated that the adsorption of MO onto APTES-functionalized biomass was spontaneous and endothermic, and enthalpy is driven in the physisorption mode. The regeneration performance revealed that the APTES-functionalized biomass material could be easily recycled and reused by maintaining very good performance even after five cycles. The adsorbent material was also employed to treat two simulated dye house effluents, which showed 48% removal. At last, the APTES biomass-based material may find significant applications as a multifunctional adsorbent and can be used further to separate pollutants from wastewater.
通过简单的溶胶-凝胶法成功制备了一种生物质氨基二氧化硅功能化材料。将3-氨丙基三乙氧基硅烷（APTES）添加到富含单宁的葡萄残渣中，以改善其物理化学性质并增强吸附性能。APTES功能化导致材料特性发生显著变化。由于其独特的特性，如表面存在大量官能团，功能化材料被有效地应用于去除甲基橙（MO）。吸附过程表明，静电相互作用是去除MO染料的主要作用机制，尽管也可能发生其他相互作用。功能化生物质对MO染料的最大吸附容量（ ）达到了361.8 mg/g。温度对MO的去除有积极影响，热力学研究表明，MO在APTES功能化生物质上的吸附是自发的且吸热的，焓以物理吸附模式驱动。再生性能表明，APTES功能化生物质材料可以很容易地回收再利用，即使经过五个循环仍能保持良好的性能。该吸附剂材料还用于处理两种模拟印染厂废水，去除率达48%。最后，基于APTES生物质的材料作为多功能吸附剂可能具有重要应用，可进一步用于从废水中分离污染物。
