材料科学
聚二甲基硅氧烷
污染物
吸附
碳纳米管
涂层
化学工程
粉煤灰
水溶液中的金属离子
陶瓷
微粒
复合材料
金属
纳米技术
化学
冶金
有机化学
工程类
作者
Wei Zhou,Pute Wu,Lin Zhang,Delan Zhu,Xiaoyan Zhao,Yaohui Cai
标识
DOI:10.1016/j.jhazmat.2021.126721
摘要
It is of great significance to develop a new gravity-driven filter to remove water pollutants, but it is still challenging. Here, a novel and simple strategy is demonstrated to manufacture fly ash (FA) ceramic foams showing a three-dimensional interconnected porous structure, with multiwalled carbon nanotubes (MWCNTs) implanted by combining carbamate grafting and polydimethylsiloxane coating. The polydimethylsiloxane formed a physical coating on the carbamate group, generating an effective thermal insulating layer on the outer side of the entire MWCNT. The FA foam, which shows a sufficient adsorption capacity for Pb(II) (51.67 ± 1.17 mg g-1) and Cd(II) (30.12 ± 0.37 mg g-1) at pH = 5, T = 25 °C, has a 96.33%, 95.12%, 89.50% removal efficiency for Cd(II), Pb(II), and particulate pollutants, and exhibits excellent recycling performance. This paper provides new opportunities to fabricate gravity-driven filters with low energy consumption for wastewater treatment.
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