磁活性炭在环中性环境下提高非均相太阳光fenton法对抗生素的去除效果

IF 11.4 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Water Research Pub Date : 2025-04-19 DOI:10.1016/j.watres.2025.123679

Karla V.L. Lima , Raquel F. Pupo Nogueira , Érika M.L. Sousa , Mário M.Q. Simões , Diana L.D. Lima , Vânia Calisto

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引用次数: 0

摘要

通过简单的一步合成法获得了一种纸浆和造纸工业废料基粉末活性碳与纳米铁粒子（PAC-Fe），并将其应用于异相光-芬顿处理。对 PAC-Fe 进行了表征，并将其用于在中性 pH 值和模拟太阳辐照条件下去除水中的磺胺甲噁唑（SMX）和三甲氧苄啶（TMP）。对污染物总体去除过程中不同过程（吸附、芬顿和光-芬顿）的贡献进行了评估。芬顿和光-芬顿过程中的降解均符合伪一阶和 BMG 动力学模型。光-芬顿能在 20 分钟内完全去除水中的 SMX 和 TMP。相反，在没有这种材料（H2O2 + 紫外线）的情况下，相同时间内只分别去除了 49% 和 59% 的 SMX 和 TMP。该合成程序使 PAC-Fe 具有令人满意的饱和磁化率（21.14 emu g-1）和稳定性，在应用过程中不会检测到任何铁的沥滤。PAC-Fe 的磁性使其很容易从处理过的水中分离出来，在连续五个循环后，SMX 和 TMP 的降解率分别超过 50% 和 70%。去除机制涉及不同过程的组合，异相光-芬顿和芬顿被证明是最重要的过程，其次是吸附和光助过氧化反应，但程度较小。鉴定出了八种 SMX 转化产物和十四种 TMP 转化产物，它们主要是通过羟基化作用形成的。在 pH 值接近中性的条件下取得的结果表明，PAC-Fe 可用于废水处理。

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Magnetic activated carbon for improving the removal of antibiotics by heterogeneous solar photo-Fenton at circumneutral pH

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Magnetic activated carbon for improving the removal of antibiotics by heterogeneous solar photo-Fenton at circumneutral pH

A pulp and paper industry waste-based powder activated carbon combined with Fe nanoparticles (PAC-Fe) was obtained through a simple one-step synthesis for application in heterogeneous photo-Fenton treatment. PAC-Fe was characterized and applied for the removal of sulfamethoxazole (SMX) and trimethoprim (TMP) from water at circumneutral pH and under simulated solar irradiation. The contribution of the different processes involved in the overall removal of the contaminants (adsorption, Fenton and photo-Fenton) was evaluated. Degradation in both Fenton and photo-Fenton processes were fitted to the pseudo first-order and BMG kinetic models. Photo-Fenton resulted in the complete removal of SMX and TMP from water within 20 min. In contrast, in the absence of the material (H₂O₂ + UV), only 49 % and 59 % of SMX and TMP were removed, respectively, after the same time. The synthesis procedure allowed to obtain a PAC-Fe with a satisfactory saturation magnetization (21.14 emu g^-1) and stability without any detectable leaching of iron during its application. The magnetic properties of PAC-Fe allowed for easy separation from the treated water, with degradation percentage above 50 % and 70 %, for SMX and TMP, respectively, after five consecutive cycles. The removal mechanisms involved a combination of different processes, with heterogeneous photo-Fenton and Fenton proving to be the most significant, followed by adsorption and photo-assisted peroxidation to a smaller extent. Eight transformation products of SMX were identified and fourteen for TMP, which were formed mainly by hydroxylation. The results achieved at pH close to neutral show that the PAC-Fe can be relevant for application in wastewater treatment.

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来源期刊

Water Research 环境科学-工程：环境

CiteScore

20.80

自引率

9.40%

发文量

1307

审稿时长

38 days

期刊介绍： Water Research, along with its open access companion journal Water Research X, serves as a platform for publishing original research papers covering various aspects of the science and technology related to the anthropogenic water cycle, water quality, and its management worldwide. The audience targeted by the journal comprises biologists, chemical engineers, chemists, civil engineers, environmental engineers, limnologists, and microbiologists. The scope of the journal include: •Treatment processes for water and wastewaters (municipal, agricultural, industrial, and on-site treatment), including resource recovery and residuals management; •Urban hydrology including sewer systems, stormwater management, and green infrastructure; •Drinking water treatment and distribution; •Potable and non-potable water reuse; •Sanitation, public health, and risk assessment; •Anaerobic digestion, solid and hazardous waste management, including source characterization and the effects and control of leachates and gaseous emissions; •Contaminants (chemical, microbial, anthropogenic particles such as nanoparticles or microplastics) and related water quality sensing, monitoring, fate, and assessment; •Anthropogenic impacts on inland, tidal, coastal and urban waters, focusing on surface and ground waters, and point and non-point sources of pollution; •Environmental restoration, linked to surface water, groundwater and groundwater remediation; •Analysis of the interfaces between sediments and water, and between water and atmosphere, focusing specifically on anthropogenic impacts; •Mathematical modelling, systems analysis, machine learning, and beneficial use of big data related to the anthropogenic water cycle; •Socio-economic, policy, and regulations studies.