Triethylenetetramine functionalized tannic acid/sodium alginate composite aerogel and its adsorption performance of Cu²⁺ and Pb²^.

IF 8.5 1区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

International Journal of Biological Macromolecules Pub Date : 2025-10-10 DOI:10.1016/j.ijbiomac.2025.148181

Hai Li, Xing Wang, Shilu Zhang, Chongju Mu, Faguo Li, Wei Wang, Fengwei Shi, Jianglei Hu

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引用次数: 0

Abstract

Heavy metal pollution in water could lead to a major hazard to human health and environmental integrity, which necessitates the urgent development of effective remediation strategies for removing poisonous heavy metals from wastewater. A new dual-network aerogel adsorbent (STT) was fabricated using modified tannic acid (TA) and sodium alginate (SA) to remove Cu²⁺ and Pb²⁺ from water. The influence of various factors on the adsorption process of STT was investigated. Results indicated that, compared with calcium alginate (CA) aerogel, the mechanical property of STT aerogel was enhanced to 14.0 kg·cm^-2. The maximum capacities of adsorption for Cu²⁺ and Pb²⁺ could reach 304.30 mg·g^-1 and 422.80 mg·g^-1, respectively. After 10 regeneration cycles, STT maintained the adsorption rates of 84.58 % for Cu²⁺ and 87.89 % for Pb²⁺. Analysis of kinetic, thermodynamic, and isothermal adsorption models suggested that the adsorption mechanism involved a spontaneous monolayer chemisorption process. The adsorption mechanism of STT was investigated using XPS and FT-IR, illustrating the adsorption of Cu²⁺ and Pb²⁺ by STT occurred through ion exchange and complexation processes. The STT adsorbent, in general, demonstrated promising potential as a heavy metal adsorbent.

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三乙烯四胺功能化单宁酸/海藻酸钠复合气凝胶及其对Cu2+和Pb2的吸附性能。

水中重金属污染可能对人类健康和环境完整性造成重大危害，因此迫切需要制定有效的补救战略，以清除废水中的有毒重金属。以改性单宁酸（TA）和海藻酸钠（SA）为原料制备了一种新型双网络气凝胶吸附剂（STT），用于去除水中的Cu2+和Pb2+。考察了各种因素对STT吸附过程的影响。结果表明，与海藻酸钙（CA）气凝胶相比，STT气凝胶的力学性能提高至14.0 kg·cm-2。对Cu2+和Pb2+的最大吸附量分别可达304.30 mg·g-1和422.80 mg·g-1。经过10次再生循环后，STT对Cu2+的吸附率为84.58 %，对Pb2+的吸附率为87.89 %。动力学、热力学和等温吸附模型分析表明，吸附机制涉及自发的单层化学吸附过程。利用XPS和FT-IR研究了STT对Cu2+和Pb2+的吸附机理，表明STT对Cu2+和Pb2+的吸附是通过离子交换和络合过程进行的。总的来说，STT吸附剂作为重金属吸附剂具有很好的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Biological Macromolecules 生物-生化与分子生物学

CiteScore

13.70

自引率

9.80%

发文量

2728

审稿时长

64 days

期刊介绍： The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.