Biosorption and Water Treatment Research Laboratory, Vaal University of Technology, Private Bag X021, Vanderbijlpark, 1900, South Africa.
Department of Science, Technology and Engineering, Kibabii University, P. O. Box 1699, Bungoma, 50200, Kenya.
Sci Rep. 2022 Nov 3;12(1):18609. doi: 10.1038/s41598-022-22716-w.
Benzene, toluene and xylene (BTX) are volatile organic compounds released into the environment, that require urgent removal to avoid adverse health effects. In this work, the modelling and optimization of the preparation factors for magnetite coated oleic acid (MNP-OA) composite from microwave synthesis using response surface methodology were conducted to maximize BTX removal, and iron content. The influence of five crucial preparation variables: the FeFe solution volumes, microwave power, volume of ammonia water (VAW), reaction time and volume of oleic acid (VOA) on the iron content (% Fe), and BTX adsorption capacity were investigated. The analysis of variance results revealed that VOA and VAW were the most influential factors for high % Fe content, and improved BTX removal. The % Fe, and BTX adsorption capacity for MNP-OA composite at optimized experimental conditions were estimated to be 85.57%, 90.02 mg/g (benzene), 90.07 mg/g (toluene), and 96.31 mg/g (xylene).
苯、甲苯和二甲苯（BTX）是挥发性有机化合物，会释放到环境中，需要紧急去除，以避免对健康造成不利影响。在这项工作中，使用响应面法对微波合成法制备油酸包覆磁铁矿（MNP-OA）复合材料的条件进行了建模和优化，以最大程度地去除 BTX 和增加铁含量。考察了五个关键制备变量（FeFe 溶液体积、微波功率、氨水体积（VAW）、反应时间和油酸体积（VOA））对铁含量（%Fe）和 BTX 吸附能力的影响。方差分析结果表明，VOA 和 VAW 是影响高 %Fe 含量和提高 BTX 去除率的最主要因素。在优化的实验条件下，MNP-OA 复合材料的 %Fe 和 BTX 吸附能力估计分别为 85.57%、90.02mg/g（苯）、90.07mg/g（甲苯）和 96.31mg/g（二甲苯）。
