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- Title
Adsorptive removal of vinyl polymer/ZnO nanocomposite from aqueous solution by activated sludge biomass.
- Authors
Zhao, Xia; Ma, Hongrui; Ma, Jianzhong; Gao, Dangge; Hu, Lizhen; Lv, Xiangfei
- Abstract
In this study, the removal potential of vinyl polymer/ZnO nanocomposite (PDM/ZnO) by activated sludge (AS) biomass was investigated. PDM/ZnO was effectively removed by AS adsorption (90.3% of total PDM/ZnO removed). The effects of contact time, temperature, pH of the solution, PDM/ZnO production method, initial adsorbate concentration, and properties of the adsorbent were studied. The experimental results are fitted with the Langmuir and Freundlich equations. The adsorption kinetics closely followed the pseudo-second-order model. Thermodynamic parameters (ΔH°, ΔS°, ΔG°) indicate that the adsorption of PDM/ZnO onto AS was feasible, spontaneous, and endothermic. The effects of PDM/ZnO production method and pH value both indicate that electrostatic force may main mechanism in PDM/ZnO adsorption process. The decrease in the adsorption capacity of inactivated sludge suggests that the increase of adsorbent surface area also plays a significant role in the removal process.
- Subjects
AQUEOUS solutions; VINYL polymers; ZINC oxide; ACTIVATED sludge process; ADSORPTION (Chemistry)
- Publication
Desalination & Water Treatment, 2015, Vol 54, Issue 6, p1684
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.892031