| 摘要: |
| 针对水体中镉对人体健康的持续性危害问题,本文旨在设计开发可生物降解的木质素基生物吸附材料,充分挖掘其吸附分离水环境中镉离子的性质。研究是以甘蔗渣木质素为原料,利用三(羟甲基)氨基甲烷(Tris)氨基化,制备出氨基化木质素多孔材料(M-ALs)利用SEM、FTIR、XPS、BET分析、zeta电位和接触角测量等表征对M-ALs进行分析,并结合吸附实验探究其吸附机理。结果表明,氨基的成功接枝显著提高了木质素对Cd(Ⅱ)的吸附能力。在45℃时,M-ALs对Cd(Ⅱ)的吸附量可达到86 mg/g。经过5次循环使用,M-ALs的吸附能力仍保持在80%左右。总之,M-ALs的开发为蔗渣木质素的利用提供了一条新的途径。 |
| 关键词: 甘蔗渣 镉 吸附机理 曼尼希反应 生物质吸附剂 |
| DOI： |
| 投稿时间：2024-08-05修订日期：2024-09-08 |
| 基金项目:“甘蔗渣组分拆解并制备高值化学品及功能材料过程研究”(粤桂联合基金-重点项目,2020B1515420005),“甘蔗用环境友好高效颗粒剂药肥关键技术开发与应用”(广西重点研发,桂科AB23075128),“微波-超声波双波协同磷酸-酮溶剂定向解聚蔗渣髓制备高保留纳米纤维素”(国家地区科学,22268013) |
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| Study on the Adsorption Performance of Aminated Lignin-Based Porous Materials for Cd(Ⅱ) |
|
SU KE1, HUANG KAI2
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| (1.School of Chemistry and Chemical Engineering, Guangxi University;2.National Key Laboratory of Non-food Biomass Energy Technology, Guangxi Key Laboratory of Bio-refinery, Guangxi Academy of Sciences) |
| Abstract: |
| In view of the persistent harm of cadmium in water to human health, this paper aims to design and develop biodegradable lignin-based bio-adsorbent materials to fully explore its adsorption and separation of cadmium ions in the water environment. In this study, sugarbagasse lignin was used as raw material and tris(hydroxymethyl)aminomethane (Tris) was used to prepare aminolignin porous materials (M-ALs), and M-ALs were analyzed by SEM, FTIR, XPS, BET analysis, zeta potential and contact angle measurement, and the adsorption mechanism was explored by adsorption experiments. The results demonstrated that successful amine grafting significantly enhanced the lignin’s Cd(Ⅱ) adsorption capacity. At 45°C, the M-ALs achieved an adsorption capacity of 86 mg/g for Cd(Ⅱ). Remarkably, after five adsorption-desorption cycles, the M-ALs retained approximately 80% of their original adsorption capacity. In summary, the development of M-ALs offers a promising new avenue for the valorization of sugarcane bagasse lignin. |
| Key words: Bagasse, Cadmium, Adsorption Mechanism, Mannich Reaction, Biomass Adsorbent |
