Construction of shaped adsorbent based on cyclodextrin organic polymers for removal of polycyclic aromatic hydrocarbons

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL Separation and Purification Technology Pub Date : 2024-11-17 DOI:10.1016/j.seppur.2024.130468

Lilin Fang, Peng Cui, Dongni Liu, Xiaosi Sun, Hao Ren, Hanyu Zhang, Yan Huang, Wenshuai Zhu, Zhichang Liu

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Abstract

The polycyclic aromatic hydrocarbons (PAHs) are serious organic contaminants that are produced naturally and anthropogenically. The separation of PAHs by adsorption approach provides an efficient method to avoid the negative effects of PAHs pollution. In this study, cyclodextrin (CD) was grafted to chitosan (CS) by using glutaraldehyde as crosslinking agent to construct shaped CD-CS polymers and carbonization was executed subsequently. The carbonized β-CD-CS-1000 exhibited a significant increasement of BET surface area (CD-CS polymer: 1 m²·g⁻¹; β-CD-CS-1000: 1083 m²·g⁻¹) and great PAHs adsorption performance (anthracene: 106.34 mg/g; acenaphthylene: 41.02 mg/g). The adsorption kinetic behavior and the equilibrium adsorption process were further explored. β-CD-CS-1000 showed good cyclic adsorption capacity and anti-interference stability with the xylenes as interferon. Furthermore, the adsorbents based CD-CS can be synthesized at the gram-level in the lab and exhibited great adsorption capacity in real diesel. The large-scale preparation of shaped CD-CS adsorbents made it possible to be applied to the petrochemical industry.

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构建基于环糊精有机聚合物的异型吸附剂以去除多环芳烃

多环芳烃（PAHs）是自然和人为产生的严重有机污染物。利用吸附法分离多环芳烃是避免多环芳烃污染负面影响的有效方法。在这项研究中，利用戊二醛作为交联剂，将环糊精（CD）接枝到壳聚糖（CS）上，从而构建出成型的 CD-CS 聚合物，随后进行碳化。碳化后的β-CD-CS-1000 的 BET 表面积显著增大（CD-CS 聚合物：1 m2-g-1；β-CD-CS-1000：1083 m2-g-1），多环芳烃吸附性能良好（蒽：106.34 mg/g；苊：41.02 mg/g）。进一步探讨了吸附动力学行为和平衡吸附过程。结果表明，β-CD-CS-1000 对作为干扰素的二甲苯具有良好的循环吸附能力和抗干扰稳定性。此外，基于 CD-CS 的吸附剂可在实验室中合成到克级，并在实际柴油中表现出很强的吸附能力。异型 CD-CS 吸附剂的大规模制备使其在石油化工行业的应用成为可能。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.