Sustainable TiO2/Diospyros texana seed-derived activated carbon composites for rapid photodegradation of oxytetracycline and amoxicillin under visible light

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-08-22 DOI:10.1002/jctb.70049

Muhammad Bilal, Amir Hossein Behroozi, Rifat Jahan, Javed Ali, Vahid Vatanpour

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引用次数: 0

Abstract

Background

The widespread occurrence of antibiotics in aquatic environments has emerged as a serious environmental concern due to their persistence, bioaccumulation, and role in promoting antimicrobial resistance. Conventional treatment methods are often inadequate for complete antibiotic removal. Thus, developing multifunctional, sustainable materials capable of both adsorption and degradation is essential for effective water treatment.

Results

This study introduces a novel titanium dioxide (TiO₂)/activated carbon (AC) composite synthesized from Diospyros texana seed biomass for efficient removal of oxytetracycline (OTC) and amoxycillin (AMX). The optimized 10 wt% TiO₂/AC composite, prepared via an impregnation method, exhibited enhanced visible-light photocatalytic activity and adsorption capacity. Structural characterization confirmed well-dispersed TiO₂ nanoparticles within the macroporous AC framework, promoting effective light harvesting, charge separation, and contaminant binding. The composite demonstrated thermal stability and a point of zero charge of 7.8, facilitating pH-dependent interactions with AMX and OTC. Under optimal conditions (pH 3 for AMX, pH 7 for OTC, 0.1 g/L composite), the system achieved rapid removal (> 90%), equilibrium within 3 min for AMX and 5 min for OTC. Performance remained stable for over 180 min and showed no significant decline even after five reuse cycles. However, increasing TiO₂ beyond 10% reduced efficiency due to pore blockage and loss of active surface area.

Conclusion

The synergistic integration of bio-derived AC and TiO₂ yields a cost-effective material for efficient antibiotic removal from water. Overall, this study offers a scalable strategy for wastewater remediation, addressing critical environmental challenges posed by pharmaceutical contaminants through rapid degradation within minutes. © 2025 Society of Chemical Industry (SCI).

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TiO2/Diospyros texana种子衍生活性炭复合材料在可见光下快速光降解土霉素和阿莫西林

抗生素在水生环境中的广泛存在已成为一个严重的环境问题，因为它们的持久性、生物蓄积性和促进抗菌素耐药性的作用。传统的治疗方法往往不足以完全去除抗生素。因此，开发既能吸附又能降解的多功能可持续材料对于有效的水处理至关重要。结果以得克萨斯薯蓣种子生物质为原料合成二氧化钛(TiO2)/活性炭（AC）复合材料，可有效去除土霉素（OTC）和阿莫西林（AMX）。通过浸渍法制备的10 wt% TiO2/AC复合材料具有增强的可见光催化活性和吸附能力。结构表征证实了在大孔交流框架内分散良好的TiO2纳米颗粒，促进了有效的光收集、电荷分离和污染物结合。该复合材料表现出热稳定性，零电荷点为7.8，有利于与AMX和OTC的ph依赖相互作用。在最佳条件下（AMX pH为3，OTC pH为7,0.1 g/L复合材料），系统实现了快速去除（> 90%）， AMX在3分钟内达到平衡，OTC在5分钟内达到平衡。性能在180分钟内保持稳定，即使经过5次重用循环也没有明显下降。然而，当TiO2含量超过10%时，由于孔隙堵塞和活性表面积的损失，效率会降低。结论生物源性AC与TiO2协同整合是一种高效去除水中抗生素的材料。总体而言，本研究提供了一种可扩展的废水修复策略，通过在几分钟内快速降解来解决药物污染物带来的关键环境挑战。©2025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.