Iron-modified biochar for enhanced removal of ciprofloxacin and amoxicillin in wastewater

IF 15 2区环境科学与生态学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Environmental Chemistry Letters Pub Date : 2024-11-10 DOI:10.1007/s10311-024-01792-6

Sumita, Yong Wang, Jianping Yu, Cong Li

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Abstract

Antibiotic contamination in wastewater is an urgent environmental and public health concern because conventional treatment methods are ineffective in completely removing these pollutants. Iron-modified biochar, synthesized from agricultural waste, is proposed as an efficient and sustainable media for removal of ciprofloxacin and amoxicillin from wastewater. Iron-modified biochar was synthesized using a simple pyrolysis process with corn and ferrous sulfate as feedstock. Adsorbents were characterized by fourier transform infrared spectroscopy, X-Ray diffraction, and scanning electron microscopy. Removal performance of antibiotics was evaluated under different conditions, including antibiotic dosage, concentration of hydrogen peroxide, pH, and amount of humic acid. The results demonstrated high removal efficiencies of 87% for ciprofloxacin and 83% for amoxicillin within 25 min. Mechanistic studies revealed the generation of hydroxyl radicals (^•OH) and singlet oxygen (¹O₂), and confirmed the activation of hydrogen peroxide in the system. These findings highlight the potential of iron-modified biochar as a sustainable and effective catalyst for antibiotic removal, offering a promising solution for reducing pharmaceutical contamination in wastewater.

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铁改性生物炭用于提高废水中环丙沙星和阿莫西林的去除率

废水中的抗生素污染是一个紧迫的环境和公共卫生问题，因为传统的处理方法无法完全去除这些污染物。利用农业废弃物合成的铁改性生物炭被认为是去除废水中环丙沙星和阿莫西林的高效且可持续的介质。铁改性生物炭是以玉米和硫酸亚铁为原料，通过简单的热解工艺合成的。傅立叶变换红外光谱、X 射线衍射和扫描电子显微镜对吸附剂进行了表征。在抗生素用量、过氧化氢浓度、pH 值和腐植酸用量等不同条件下，对抗生素的去除性能进行了评估。结果表明，在 25 分钟内，环丙沙星和阿莫西林的去除率分别高达 87% 和 83%。机理研究揭示了羟基自由基（-OH）和单线态氧（1O₂）的产生，并证实了系统中过氧化氢的活化。这些发现凸显了铁改性生物炭作为一种可持续、有效的抗生素去除催化剂的潜力，为减少废水中的药物污染提供了一种前景广阔的解决方案。

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来源期刊

Environmental Chemistry Letters 环境科学-工程：环境

CiteScore

32.00

自引率

7.00%

发文量

175

审稿时长

2 months

期刊介绍： Environmental Chemistry Letters explores the intersections of geology, chemistry, physics, and biology. Published articles are of paramount importance to the examination of both natural and engineered environments. The journal features original and review articles of exceptional significance, encompassing topics such as the characterization of natural and impacted environments, the behavior, prevention, treatment, and control of mineral, organic, and radioactive pollutants. It also delves into interfacial studies involving diverse media like soil, sediment, water, air, organisms, and food. Additionally, the journal covers green chemistry, environmentally friendly synthetic pathways, alternative fuels, ecotoxicology, risk assessment, environmental processes and modeling, environmental technologies, remediation and control, and environmental analytical chemistry using biomolecular tools and tracers.