期刊
WATER AIR AND SOIL POLLUTION
卷 231, 期 11, 页码 -出版社
SPRINGER INT PUBL AG
DOI: 10.1007/s11270-020-04901-7
关键词
Wastewater; Water treatment; PET waste bottle; Textile dye; TiO2-G5 immobilization
资金
- FACEPE [APQ-0073-3.06/17]
The adsorption process is one of the most promising alternatives for textile effluent treatment. Different materials have been used as adsorbents and most of them present hard recovery, increasing the process cost. In this work, polyethylene terephthalate (PET) waste bottles were used as a substrate for the formation of titanium dioxide (TiO2-G5) films aiming at Reactive Black 5 removal by adsorption process. The TiO2-G5/PET films were characterized by N-2 adsorption-desorption, zeta potential analysis, X-ray diffraction (XRD), and adherence test. The pH, adsorbent charge, and stirring effects were investigated. Initially, the effects of the adsorbent mass, pH of the solution, and stirring were studied, obtaining a maximum adsorptive capacity of 155.04 mg g(-1) in the greatest condition (4 mg, pH = 4 and no stirring). The experimental data were fitted by the Langmuir and Freundlich isotherms. The Langmuir model presented the greatest fit, evidencing monolayer adsorption for this process. The kinetic study showed a great fit between the adsorption process and the pseudo-first-order kinetic model, which presented a correlation coefficient of 0.982. The thermodynamic parameters-enthalpy (increment H = - 19.53 kJ mol(-1)), entropy (increment S = - 50.26 J mol(-1) K-1), and Gibbs energy (- 5.31, - 4.80, and - 4.30 kJ mol(-1)at 283.15 K, 293.15 K, and 303.15 K, respectively)-indicate a spontaneous and exothermic process. Finally, the regeneration by solar radiation exposure led to an efficient TiO2-G5/PET spent sheets recovery, exhibiting good stability after 5 cycles of use.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据