de França Maíra Rachel Gerônimo, Anjos Raoni Batista Dos, Hilário Larissa Sobral, Oliveira Ingrid de Castro Dos Santos, Silva Augusto Manoel Araújo, Gondim Ysla Karoline Ferreira, Martínez-Huitle Carlos Alberto, Gondim Amanda Duarte
Núcleo de Processamento Primário e Reúso de Água Produzida e Resíduos (LABPROBIO-NUPPRAR), Federal University of Rio Grande do Norte, Natal, Brazil.
Renewable Energy Environmental Sustainable Research Group, Chimistry Institute, Federal University of Rio Grande do Norte, Natal, Brazil.
Environ Technol. 2025 Mar;46(7):1005-1020. doi: 10.1080/09593330.2024.2375005. Epub 2024 Jul 7.
fibres have been proposed for free-phase diesel removal in case of spillage into groundwater. For this, characterizations were carried out using Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FEG-SEM), wettability and contact angle measurements. Sorption oil capacity, kinetic, isothermal and recycling behaviour were evaluated. For initial optimization of the oil sorption capacity, an experimental design (DOE) was applied, with the optimized condition being 60 g L of diesel in water and 0.01 g of fibre. Then, the results clearly indicated that the fibres have a hydrophobic and oleophilic character, quickly reaching more than 71.43 g g of diesel sorption, according to the adjustment (² > 0.99) of the pseudo-second order and Langmuir models, governed by absorption mechanisms. It should also be noted that at the end of 8 reuse cycles, the fibre presented a total accumulated sorption capacity of about 252.6 g g of diesel. Furthermore, a laboratory-scale experiment was carried out to remove diesel from groundwater in gas station areas, the fibre removed 98.55% to 99.97% of removal efficiencies were achieved of the free phase over time. Therefore, the material demonstrates excellent characteristics for removing diesel spills in groundwater due to its fast, high and stable removal capacity.
有人提出在柴油泄漏到地下水中的情况下，使用纤维去除游离相柴油。为此，采用傅里叶变换红外光谱（FTIR）、场发射扫描电子显微镜（FEG-SEM）、润湿性和接触角测量等方法进行了表征。评估了吸附油容量、动力学、等温线和循环利用行为。为了初步优化油吸附容量，应用了实验设计（DOE），优化条件为水中柴油浓度60 g/L和纤维用量0.01 g。结果清楚地表明，这些纤维具有疏水亲油特性，根据伪二级动力学模型和朗缪尔模型的拟合（R²>0.99），通过吸附机制，能迅速达到超过71.43 g/g的柴油吸附量。还应注意的是，在8个重复使用周期结束时，纤维的总累积吸附容量约为252.6 g/g柴油。此外，还进行了实验室规模的实验，以去除加油站区域地下水中的柴油，随着时间的推移，纤维对游离相的去除效率达到了98.55%至99.97%。因此，该材料因其快速、高效和稳定的去除能力，在去除地下水中柴油泄漏方面表现出优异的特性。
