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磁性纤维素-壳聚糖-海藻酸盐复合水凝胶珠生物吸附剂的制备与表征

Fabrication and Characterization of Magnetic Cellulose-Chitosan-Alginate Composite Hydrogel Bead Bio-Sorbent.

作者信息

Abdul Rahman Aida Syafiqah, Fizal Ahmad Noor Syimir, Khalil Nor Afifah, Ahmad Yahaya Ahmad Naim, Hossain Md Sohrab, Zulkifli Muzafar

机构信息

Universiti Kuala Lumpur, Branch Campus Malaysian Institute of Chemical and BioEngineering Technology, 78000 Alor Gajah, Melaka, Malaysia.

Centre for Sustainability of Ecosystem & Earth Resources (Pusat ALAM) Universiti Malaysia Pahang, Lebuh Persiaran Tun Khalil Yaakob, 26300 Gambang, Pahang, Malaysia.

出版信息

Polymers (Basel). 2023 May 29;15(11):2494. doi: 10.3390/polym15112494.

DOI:10.3390/polym15112494
PMID:37299293
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10255174/
Abstract

The implementation of inorganic adsorbents for the removal of heavy metals from industrial effluents generates secondary waste. Therefore, scientists and environmentalists are looking for environmentally friendly adsorbents isolated from biobased materials for the efficient removal of heavy metals from industrial effluents. This study aimed to fabricate and characterize an environmentally friendly composite bio-sorbent as an initiative toward greener environmental remediation technology. The properties of cellulose, chitosan, magnetite, and alginate were exploited to fabricate a composite hydrogel bead. The cross linking and encapsulation of cellulose, chitosan, alginate, and magnetite in hydrogel beads were successfully conducted through a facile method without any chemicals used during the synthesis. Energy-dispersive X-ray analysis verified the presence of element signals of N, Ca, and Fe on the surface of the composite bio-sorbents. The appearance and peak's shifting at 3330-3060 cm in the Fourier transform infrared spectroscopy analysis of the composite cellulose-magnetite-alginate, chitosan-magnetite-alginate, and cellulose-chitosan-magnetite-alginate suggested that there are overlaps of O-H and N-H and weak interaction of hydrogen bonding with the FeO particles. Material degradation, % mass loss, and thermal stability of the material and synthesized composite hydrogel beads were determined through thermogravimetric analysis. The onset temperature of the composite cellulose-magnetite-alginate, chitosan-magnetite-alginate, and cellulose-chitosan-magnetite-alginate hydrogel beads were observed to be lower compared to raw-material cellulose and chitosan, which could be due to the formation of weak hydrogen bonding resulting from the addition of magnetite FeO. The higher mass residual of cellulose-magnetite-alginate (33.46%), chitosan-magnetite-alginate (37.09%), and cellulose-chitosan-magnetite-alginate (34.40%) compared to cellulose (10.94%) and chitosan (30.82%) after degradation at a temperature of 700 °C shows that the synthesized composite hydrogel beads possess better thermal stability, owing to the addition of magnetite and the encapsulation in the alginate hydrogel beads.

摘要

采用无机吸附剂去除工业废水中的重金属会产生二次废物。因此，科学家和环保人士正在寻找从生物基材料中分离出来的环境友好型吸附剂，以高效去除工业废水中的重金属。本研究旨在制备和表征一种环境友好型复合生物吸附剂，作为迈向更绿色环境修复技术的一项举措。利用纤维素、壳聚糖、磁铁矿和海藻酸盐的特性制备了一种复合水凝胶珠。通过一种简便的方法成功地实现了纤维素、壳聚糖、海藻酸盐和磁铁矿在水凝胶珠中的交联和包封，合成过程中未使用任何化学物质。能量色散X射线分析证实了复合生物吸附剂表面存在N、Ca和Fe的元素信号。复合纤维素-磁铁矿-海藻酸盐、壳聚糖-磁铁矿-海藻酸盐和纤维素-壳聚糖-磁铁矿-海藻酸盐在傅里叶变换红外光谱分析中3330-3060 cm处的外观和峰位移动表明，存在O-H和N-H的重叠以及与FeO颗粒的弱氢键相互作用。通过热重分析测定了材料的降解、质量损失百分比以及材料和合成复合水凝胶珠的热稳定性。观察到复合纤维素-磁铁矿-海藻酸盐、壳聚糖-磁铁矿-海藻酸盐和纤维素-壳聚糖-磁铁矿-海藻酸盐水凝胶珠的起始温度低于原料纤维素和壳聚糖，这可能是由于添加磁铁矿FeO导致形成了弱氢键。在700℃降解后，纤维素-磁铁矿-海藻酸盐（33.46%）、壳聚糖-磁铁矿-海藻酸盐（37.09%）和纤维素-壳聚糖-磁铁矿-海藻酸盐（34.40%）的质量残留率高于纤维素（10.94%）和壳聚糖（30.82%），这表明合成的复合水凝胶珠由于添加了磁铁矿并包封在海藻酸盐水凝胶珠中而具有更好的热稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/9e558980383d/polymers-15-02494-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/13e8e4b18f39/polymers-15-02494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/1f6e60940a76/polymers-15-02494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/73d11f4cf996/polymers-15-02494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/709470fc717a/polymers-15-02494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/73b435e99525/polymers-15-02494-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/6f064ecd8101/polymers-15-02494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/19c61038c26a/polymers-15-02494-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/50cfd3251d28/polymers-15-02494-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/9e558980383d/polymers-15-02494-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/13e8e4b18f39/polymers-15-02494-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/1f6e60940a76/polymers-15-02494-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/73d11f4cf996/polymers-15-02494-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/709470fc717a/polymers-15-02494-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/73b435e99525/polymers-15-02494-g005a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/6f064ecd8101/polymers-15-02494-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/19c61038c26a/polymers-15-02494-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/50cfd3251d28/polymers-15-02494-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/770c/10255174/9e558980383d/polymers-15-02494-g009.jpg

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