Liu Qijie, Dai Guangze, Bao Yanling
a School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , People's Republic of China.
b Aerospace Composites Research Institute , Xi'an , People's Republic of China.
Environ Technol. 2018 Aug;39(16):2105-2116. doi: 10.1080/09593330.2017.1351490. Epub 2017 Jul 16.
Carbon fiber (CF) is widely used as a sludge biofilm support material for wastewater treatment. Carbon nanotubes/carbon fiber (CNTs/CF) hybrid material was prepared by ultrasonically assisted electrophoretic deposition (EPD). CF supports (CF without handling, CF oxidized by nitric acid, CNTs/CF hybrid material) were evaluated by sludge immobilization tests, bacterial cell adsorption tests and Derjaguin -Landau -Verwey -Overbeek (DLVO) theory. We found that the CNTs/CF hybrid material has a high capacity for adsorbing activated sludge, nitrifying bacterial sludge and pure strains (Escherichia coli and Staphylococcus aureus). CNTs deposited on CF surface easily wound around the curved surface of bacterial cell which resulted in capturing more bacterial cells. DLVO theory indicated the lowest total interaction energy of CNTs/CF hybrid material, which resulted in the highest bacteria cell adsorption velocity. Experiments and DLVO theory results proved that CNTs/CF hybrid material is a super support material for sludge biofilms.
碳纤维（CF）作为一种污泥生物膜载体材料被广泛应用于废水处理。通过超声辅助电泳沉积（EPD）制备了碳纳米管/碳纤维（CNTs/CF）复合材料。通过污泥固定化试验、细菌细胞吸附试验以及德亚金-朗道-维韦-奥弗比克（DLVO）理论对CF载体（未处理的CF、经硝酸氧化的CF、CNTs/CF复合材料）进行了评估。我们发现，CNTs/CF复合材料对活性污泥、硝化细菌污泥和纯菌株（大肠杆菌和金黄色葡萄球菌）具有较高的吸附能力。沉积在CF表面的CNTs容易缠绕在细菌细胞的曲面上，从而捕获更多的细菌细胞。DLVO理论表明CNTs/CF复合材料的总相互作用能最低，这导致细菌细胞的吸附速度最高。实验和DLVO理论结果证明，CNTs/CF复合材料是一种用于污泥生物膜的超级载体材料。
