水溶液
聚苯胺
吸附
甲基橙
木棉
材料科学
接触角
核化学
傅里叶变换红外光谱
朗缪尔吸附模型
朗缪尔
吸附
高分子化学
弗伦德利希方程
化学工程
化学
聚合
复合材料
有机化学
聚合物
工程类
催化作用
生物
光催化
生态学
作者
Marvin U. Herrera,Cybelle M. Futalan,Rontgen B. Gapusan,Mary Donnabelle L. Balela
摘要
Abstract Hollow tubular structured kapok fibers (Ceiba pentandra) were coated with polyaniline (PANI) molecules using an in situ oxidative polymerization technique. The tubular morphology of the kapok fibers was retained after PANI coating. The Fourier transform infrared (FT-IR) spectrum of the PANI-coated kapok fibers illustrated the vibration modes associated with the presence of PANI molecules. The PANI-treated kapok fibers achieved complete wettability with water molecules (zero water contact angle) from initially being highly hydrophobic (contact angle = 120°). In the present work, the removal of contaminants such as methyl orange dye and Cu(II) from aqueous solution using polyaniline-coated kapok fibers was investigated. Isotherm studies show that the removal of methyl orange dye (R2 ≥ 0.959) and Cu(II) (R2 ≥ 0.972) using PANI-coated kapok fibers follow the Langmuir isotherm model with maximum sorption capacities determined to be 75.76 and 81.04 mg/g, respectively. Based from thermodynamic studies, the sorption of methyl orange dye and Cu(II) are endothermic, feasible and spontaneous. Furthermore, kinetic studies show that the both processes follow a pseudo-second-order model, implying that the rate-determining step is chemisorption.
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