Nguyen Ngoan Thi Thao, Tran Tuu Thi, Lam Tan Van, Phung Sy Chi, Nguyen Duyen Thi Cam
Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, 298-300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Vietnam.
Environ Sci Pollut Res Int. 2024 Dec;31(60):67382-67396. doi: 10.1007/s11356-023-31679-y. Epub 2023 Dec 30.
A major challenge that humans facing is the uncontrolled discharge of antibiotic-containing wastewater into the environment, accompanying with huge threats to human community. The utilization of cost-effective biomass-based adsorbents is considered a potential solution for the treatment of antibiotic wastewater. This study aims to optimize the synthesis of MgFeO nanoparticles loaded on prickly pear biochar (PPB) with outstanding sulfadiazine adsorbability using response surface methodology. Thirteen materials (MgFeO-PPB) produced based on Box-Behnken design were tested to evaluate the impact of the main factors on the material preparation process, including ratio of MgFeO:PPB precursors, calcination temperature and calcination time. Under optimized conditions, i.e., MgFeO:PPB ratio 0.5, temperature 600 °C and time 1 h, the production yield of 46.5% and sulfadiazine removal percentage of 85.4% were obtained. Characterization of optimized MgFeO-PPB indicated the good porosity and functionality suitable for the adsorption of sulfadiazine. Elovich model showed the best description of kinetic process. Temkin model was considered to be an accurate description of the isotherm adsorption. Proposed mechanism for antibiotic adsorption onto MgFeO-PPB was described. We clarify cost-benefit analysis to asses the importance of MgFeO-PPB as well as the economic and environmental impacts of biochar-based composites.
人类面临的一个重大挑战是含抗生素废水不受控制地排放到环境中，这对人类社会构成了巨大威胁。利用具有成本效益的生物质基吸附剂被认为是处理抗生素废水的一种潜在解决方案。本研究旨在使用响应面法优化负载在仙人掌生物炭（PPB）上的MgFeO纳米颗粒的合成，该纳米颗粒具有出色的磺胺嘧啶吸附能力。基于Box-Behnken设计制备了13种材料（MgFeO-PPB），以评估主要因素对材料制备过程的影响，包括MgFeO:PPB前驱体比例、煅烧温度和煅烧时间。在优化条件下，即MgFeO:PPB比例为0.5、温度为600℃、时间为1小时，获得了46.5%的产率和85.4%的磺胺嘧啶去除率。对优化后的MgFeO-PPB进行表征，结果表明其具有良好的孔隙率和官能团，适合吸附磺胺嘧啶。Elovich模型对动力学过程的描述最佳。Temkin模型被认为能准确描述等温吸附。描述了抗生素在MgFeO-PPB上吸附的拟议机制。我们阐明了成本效益分析，以评估MgFeO-PPB的重要性以及生物炭基复合材料的经济和环境影响。
