Applied Water Science ( IF 5.7 ) Pub Date : 2024-08-13 , DOI: 10.1007/s13201-024-02261-9 Khadijeh Azarshab , Majid Hashemi , Alireza Nasiri , Abbas Khodabakhshi
Emerging contaminants such as ceftriaxone are a significant issue in the environment. They have led to a series of ecological, environmental, and health issues, and it is urgent to find a green and secure method to remove antibiotics from water effectively. In this research, the CuCoFe2O4@Gum Arabic (GA)/Activated Carbon (AC) as an innovative bio-based matrix magnetic nanocatalyst was synthesized for the efficient degradation of ceftriaxone from aqueous media. The structure of CuCoFe2O4@GA/AC was characterized via FESEM, EDS, Mapping, XRD, FTIR, VSM, and DRS analyses. The structural analysis of the catalyst revealed its synthesis at the nanometer scale (40–50 nm), exhibiting high magnetic strength (Ms: 5.38 emu/g) and favorable optical properties with a bandgap of 3.6 eV. Under optimized conditions, including a pH of 5, 60 min of irradiation time, 0.24 g/L photocatalyst dose, and ceftriaxone concentration of 5 mg/L, the removal efficiency from synthetic and real samples was 94.43% and 62.5%, respectively. The photocatalytic degradation process of ceftriaxone followed pseudo-first-order and Langmuir–Hinshelwood kinetic models. Furthermore, analysis of the process mechanism indicated a prominent role of the superoxide radical. The catalyst had a high recovery capability and chemical stability. The photocatalytic degradation of ceftriaxone by CuCoFe2O4@GA/AC showcased remarkable efficiency, indicating its potential utility in the treatment of wastewater contaminated with antibiotics.
中文翻译:
CuCoFe2O4@GA/AC作为生物基基质磁性纳米异质光催化剂的合成和表征,用于水介质中头孢曲松的降解
头孢曲松等新兴污染物是环境中的一个重大问题。它们引发了一系列的生态、环境和健康问题,迫切需要找到一种绿色、安全的方法来有效去除水中的抗生素。在这项研究中,合成了CuCoFe 2 O 4 @Gum阿拉伯语(GA)/活性炭(AC)作为一种创新的生物基基质磁性纳米催化剂,用于有效降解水介质中的头孢曲松。通过FESEM、EDS、Mapping、XRD、FTIR、VSM 和DRS 分析对CuCoFe 2 O 4 @GA/AC 的结构进行了表征。催化剂的结构分析揭示了其在纳米尺度(40-50 nm)的合成,表现出高磁场强度(Ms:5.38 emu/g)和良好的光学性质,带隙为3.6 eV。在优化条件下,包括pH为5、照射时间60分钟、光催化剂剂量0.24 g/L、头孢曲松浓度5 mg/L,合成样品和实际样品的去除效率分别为94.43%和62.5%。头孢曲松的光催化降解过程遵循伪一级动力学模型和 Langmuir-Hinshelwood 动力学模型。此外,对该过程机理的分析表明超氧自由基的显着作用。该催化剂具有较高的回收能力和化学稳定性。 CuCoFe 2 O 4 @GA/AC 光催化降解头孢曲松表现出显着的效率,表明其在处理抗生素污染废水中的潜在用途。