Journal
CHEMICAL ENGINEERING JOURNAL
Volume 361, Issue -, Pages 528-537Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.12.093
Keywords
Poly(pyrrole methane); Steric hindrance; HASB theory; Selective adsorption; Heavy metal ions
Categories
Funding
- Shaanxi Key research and development projects, China [2017SF-386]
- National Natural Science Foundation of China [21307098, 21507104]
- Fundamental Research Funds for the Central Universities of China
Ask authors/readers for more resources
Two poly(pyrrole methane)s (PPD2HBA and PPD3HBA) were successfully synthesized, with focusing on the effect of steric hindrance on the selective adsorption of heavy metal ions. The structure and morphology of PPD2HBA and PPD3HBA were characterized by FT-IR, UV-Vis, H-1 NMR, BET, SEM, XPS and Zeta potential. The influencing factors of the Pb2+-adsorption onto the two adsorbents were systematically studied, including various solution conditions and co-existing metal ions effect. These results demonstrated that the two adsorbents showed slightly different adsorption behaviors. The maximum adsorption capacities of Pb2+ onto PPD2HBA and PPD3HBA were 41.35 and 32.10 mg.g(-1) at pH= 6.0 and 318 K, respectively. The crucial steric hindrance verified by FT-IR and XPS before and after Pb2+ adsorption, showed better consistence in PPD2HBA with the size and shape of the hydrated Pb2+ than that in PPD3HBA, which can be further supported by the adsorption property of PPD4HBA. In addition, the effect of the co-existing metal ions of Pb2+ onto PPD2HBA and PPD3HBA could be testified by the HSBA theory. The proposed adsorption mechanism in this paper was of remarkable potential for the design of new adsorbent to selectively adsorb heavy metal ions from wastewater.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available