Hydrothermal modification of natural zeolite and its application in anti-inflammatory removal

IF 2.8 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2024-09-13 DOI:10.1002/jctb.7749

Paula Valéria Viotti Moreira, Wardleison Martins Moreira, Débora Federici dos Santos, Henrique Straioto, Marcelo Fernandes Vieira

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引用次数: 0

Abstract

BACKGROUND

Natural zeolite's inefficiency in removing organic compounds has been a significant challenge in water treatment. To address this, this study focuses on an innovative and efficient hydrothermal process for altering the zeolitic structure. The study aimed to determine the optimal conditions for hydrothermal zeolite treatment to remove diclofenac, thereby contributing to the expansion of zeolite's potential use in water treatment.

RESULTS

The study found that modification temperature significantly affected diclofenac removal, whereas cetrimonium bromide (CTAB) concentration impacted modification yield. The conditions (150 °C, 0.374 g_CTAB/g_zeolite, for 6 h) were selected for their mildness and effectiveness. Characterization showed a reduction in micropores, development of mesopores and an increase in clinoptilolite content while maintaining crystallinity. Fourier transform infrared analysis and zeta potential measurements confirmed the surfactant's presence. Adsorption tests indicated that pH, except at extremely basic levels, did not affect diclofenac removal, highlighting the method's industrial applicability. The kinetic study revealed slower adsorption influenced by intraparticle diffusion. Equilibrium studies indicated spontaneous, exothermic adsorption as a result of stronger interactions between the modified adsorbent and diclofenac. The maximum adsorption capacity was 11.15 mg g⁻¹, with hydrophobic and electrostatic interactions enhancing drug removal efficiency compared to unmodified zeolite.

CONCLUSION

The findings demonstrate the significant potential of hydrothermal modification with CTAB for using natural zeolites in wastewater treatment through adsorption. © 2024 Society of Chemical Industry (SCI).

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天然沸石的水热改性及其在消炎清除中的应用

背景天然沸石去除有机化合物的效率较低，这一直是水处理领域面临的重大挑战。为解决这一问题，本研究重点关注改变沸石结构的创新高效水热法。研究旨在确定水热法沸石处理去除双氯芬酸的最佳条件，从而为扩大沸石在水处理中的潜在用途做出贡献。所选条件（150 °C、0.374 gCTAB/沸石、6 小时）温和有效。表征结果表明，在保持结晶度的同时，微孔减少，中孔增多，钙钛矿含量增加。傅立叶变换红外分析和 zeta 电位测量证实了表面活性剂的存在。吸附测试表明，除极碱性水平外，pH 值不会影响双氯芬酸的去除，这突出表明了该方法的工业适用性。动力学研究表明，受颗粒内扩散的影响，吸附速度较慢。平衡研究表明，由于改性吸附剂与双氯芬酸之间的相互作用更强，因此吸附过程会自发放热。最大吸附容量为 11.15 mg g-1，与未改性沸石相比，疏水和静电相互作用提高了药物去除效率。© 2024 化学工业学会（SCI）。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.