SBA-15 and Cu²⁺ amino grafted SBA-15 adsorbents (CuNH₂_g_SBA-15) were prepared to investigate the equilibrium and dynamic adsorptive removal of a set of contaminants of emerging concern (CECs; carbamazepine, caffeine, clofibric acid, salicylic acid, and naproxen) from water. Multicomponent and CEC metabolites adsorption was also evaluated to elucidate effects on adsorption capacity and selectivity. Equilibrium adsorption studies showed that CuNH₂_g_SBA-15 is capable of removing anionic and acidic CECs even at trace level concentrations. However, multicomponent tests revealed a decrease of 30% in adsorption capacity in the case of the acids. The CuNH₂_g_SBA-15 variant was less affected by multicomponent competitive adsorption, probably due to the ability of this adsorbent to interact with CECs through several, simultaneous adsorption mechanisms (i.e., electrostatic interaction, hydrogen bonds, and metal coordination complexes). These were confirmed via X-ray photoelectron spectroscopy (XPS) analyses. Preliminary fixed-bed adsorption tests showed that beds made of CuNH₂_g_SBA-15 are prone to mass-transfer resistance in comparison to those made of unmodified SBA-15, causing a decrease in both adsorption capacity and degree of bed utilization. Adsorption of parent/metabolites CEC binary mixtures resulted in a reduction in adsorption capacity of the parent CECs, but the adsorbents showed a remarkable selectivity toward the metabolites, particularly CuNH₂_g_SBA-15. In general, this study provides substantial evidence that the anchoring of amine/copper species onto the surface of mesoporous silica may provide a platform for the development of CEC selective adsorbents for water treatment.

中文翻译：

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Cu ²⁺氨基接枝SBA-15介孔二氧化硅对水溶液中新出现的污染物的吸附：多组分和代谢物的吸附

制备了SBA-15和Cu ²⁺氨基接枝的SBA-15吸附剂（CuNH ₂ _ g _SBA-15），以研究一系列新兴污染物（CEC；卡马西平，咖啡因，氯纤维酸，水杨酸和萘普生）。还评估了多组分和CEC代谢物的吸附，以阐明其对吸附容量和选择性的影响。平衡吸附研究表明，CuNH ₂ _克_SBA-15是一种即使痕量水平的浓度去除阴离子和酸性的CEC的。但是，多组分测试表明，在使用酸的情况下，吸附能力降低了30％。CuNH ₂ _ g_SBA-15变体受多组分竞争性吸附的影响较小，可能是由于该吸附剂通过几种同时发生的吸附机理（即静电相互作用，氢键和金属配位络合物）与CEC相互作用的能力所致。这些已通过X射线光电子能谱（XPS）分析得到了证实。初步固定床吸附试验表明，床层由CuNH ₂ _ g制成与未改性的SBA-15相比，_SBA-15倾向于具有传质阻力，从而导致吸附能力和床利用率降低。父/代谢物CEC二元混合物的吸附导致在亲本的CEC的吸附容量的降低，但吸附剂表现出对所述代谢物的显着的选择性，特别是CuNH ₂ _克_SBA-15。通常，该研究提供了充分的证据，表明胺/铜物质在中孔二氧化硅表面的锚固可能为开发用于水处理的CEC选择性吸附剂提供了平台。