用于快速去除四环素的 CTAB-土工聚合物吸附剂的结构和功能设计：比较研究

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2024-09-25 DOI:10.1016/j.seppur.2024.129872

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引用次数: 0

摘要

开发了一种粉末、无机膜和3D打印十六烷基三甲基溴化铵（CTAB）-土工聚合物吸附剂系统，用于吸附四环素（TC）。通过实验、表征和密度泛函理论（DFT）计算，系统研究了基于吸附体系动态 pH 值的吸附性能、吸附机理和吸附循环应用。结果表明：在高碱性环境中，由于土工聚合物自发释碱，CTAB的引入明显提高了对TC的吸附响应。在与 TC 物种相对应的动态 pH 值范围内，CTAB-土工聚合物对 TC 的吸附效率最高。CTAB-土工聚合物与 TC 的主要影响机制是静电作用，辅以氢键和 n-π 作用。含有 11 wt% CTAB 的粉末吸附剂在 2 min 时可捕获 92.38 % 的 TC，符合伪二阶模型，也适用于痕量 TC 的吸附。虽然整体吸附剂扩散路径的延长限制了吸附速率，但三维打印吸附剂在 302 分钟时的吸附效率达到 84.20%。11 %CT-GA 的吸附（4 次）-解吸（3 次）循环性能（24 分钟时为 81.15%，第 4 次吸附）和 11 %CT-3DP 的循环累积吸附效率（120 分钟时为 59.23%，第 4 次吸附）均表现突出。此外，还提供了一个平均 R2 值趋于 1 且均方根误差（0.0747）较低的高精度性能预测模型，可为 CTAB-土工聚合物吸附剂的后续工业应用提供理论和技术参考。

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Structural and functional design of CTAB-geopolymer adsorbents for rapid removal of tetracycline: A comparative study

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Structural and functional design of CTAB-geopolymer adsorbents for rapid removal of tetracycline: A comparative study

A powder, inorganic membrane and 3D printing cetyltrimethylammonium bromide (CTAB)-geopolymer adsorbents system for adsorbing tetracycline (TC) was developed. And the adsorption properties, adsorption mechanism, adsorption cycle application based on the dynamic pH of adsorption system were systematically investigated by experiment, characterization and density functional theory (DFT) calculation. The introduction of CTAB significantly increased the adsorption response to TC in the high alkaline environment caused by spontaneous alkali release of geopolymer. The adsorption of CTAB-geopolymer for TC was most efficient in the dynamic pH range corresponding to TC^- species. The predominant influencing mechanism between CTAB-geopolymer with TC was electrostatic interaction assisted by the hydrogen bonding and n-π interaction. The powder adsorbent with 11 wt% CTAB can capture 92.38 % TC at 2 min and fitted the pseudo-second-order model, and was also suitable for adsorption of trace TC. Although the extension of the diffusion path of the monolithic adsorbents limited the adsorption rate, the 3D printed adsorbent showed an adsorption efficiency of 84.20 % at 302 min. The outstanding adsorption (4 times)-desorption (3 times) cycle properties of 11 %CT-GA (81.15 % at 24 min, 4th adsorption) and cycle cumulative adsorption efficiency of 11 %CT-3DP (59.23 % at 120 min, 4th adsorption) adsorbent were exhibited. Furthermore, a high accuracy performance prediction model with the mean R² value tended to 1 and the low root mean square error (0.0747) was provided, which can provide theoretical and technical reference for the subsequent industrial application of CTAB-geopolymer adsorbents.

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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.