3-氨基丙基-三乙氧基硅烷-功能化富含单宁的葡萄生物质吸附甲基橙染料：合成、表征和吸附机制,ACS Omega

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3-氨基丙基-三乙氧基硅烷-功能化富含单宁的葡萄生物质吸附甲基橙染料：合成、表征和吸附机制
ACS Omega ( IF 3.7 ) Pub Date : 2022-05-23 , DOI: 10.1021/acsomega.2c02101
Edmo H M Cavalcante ₁ , Iuri C M Candido ₁ , Helinando P de Oliveira ₁ , Kamilla Barreto Silveira ₁ , Thiago Víctor de Souza Álvares ₁ , Eder C Lima ₂ , Mikael Thyrel ₃ , Sylvia H Larsson ₃ , Glaydson Simões Dos Reis ₃

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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-氨基丙基三乙氧基硅烷 (APTES) 添加到富含单宁的葡萄渣中，以改善其理化性质并增强吸附性能。APTES 功能化导致材料特性发生重大变化。由于其独特的特性，例如其表面上丰富的官能团，功能化材料有效地应用于甲基橙 (MO) 的去除。吸附过程表明静电相互作用是 MO 染料去除的主要作用机制，尽管也可能发生其他相互作用。功能化生物质实现了非常高的 MO 染料最大吸附容量 ( Q _max ) 为 361.8 mg g^–1。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和吸热的，焓在物理吸附模式下驱动。再生性能表明，APTES 功能化的生物质材料即使在五个循环后也能保持非常好的性能，可以很容易地回收和重复使用。该吸附剂材料还用于处理两种模拟染厂流出物，其去除率为 48%。最后，基于 APTES 生物质的材料可能会发现作为多功能吸附剂的重要应用，并可进一步用于从废水中分离污染物。

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3-Aminopropyl-triethoxysilane-Functionalized Tannin-Rich Grape Biomass for the Adsorption of Methyl Orange Dye: Synthesis, Characterization, and the Adsorption Mechanism

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 (Q_max) of 361.8 mg g^–1. 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.

更新日期：2022-05-23

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