Removal of aqueous Pb(II) by adsorption on Al2O3-pillared layered MnO2

doi:10.1016/j.apsusc.2017.02.011

CORC > 北京大学 > 城市与环境学院

	Removal of aqueous Pb(II) by adsorption on Al2O3-pillared layered MnO2
	Zhang, Haipeng ; Gu, Liqin ; Zhang, Ling ; Zheng, Shourong ; Wan, Haiqin ; Sun, Jingya ; Zhu, Dongqiang ; Xu, Zhaoyi
刊名	APPLIED SURFACE SCIENCE
	2017
关键词	Manganese oxides Al2O3 pillaring Pillared MnO2 Lead adsorption Heavy metal removal MANGANESE OXIDE HEAVY-METALS NANOSHEETS SORPTION FILMS IONS FABRICATION MECHANISM ADSORBENT OXIDATION
DOI	10.1016/j.apsusc.2017.02.011
英文摘要	In the present study, Al2O3-pillared layered MnO2 (p-MnO2) was synthesized using delta-MnO2 as precursor and Pb(II) adsorption on p-MnO2 and delta-MnO2 was investigated. To clarify the adsorption mechanism, Al2O3 was also prepared as an additional sorbent. The adsorbents were characterized by X-ray fluorescence analysis, powder X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and N-2 adsorption-desorption. Results showed that in comparison with pristine delta-MnO2, Al2O3 pillaring led to increased BET surface area of 166.3 m2 g(-1) and enlarged basal spacing of 0.85 nm. Accordingly, p-MnO2 exhibited a higher adsorption capacity of Pb(II) than delta-MnO2. The adsorption isotherms of Pb(II) on delta-MnO2 and Al2O3 pillar fitted well to the Freundlich model, while the adsorption isotherm of Pb(II) on p-MnO2 could be well described using a dual-adsorption model, attributed to Pb(II) adsorption on both delta-MnO2 and Al2O3. Additionally, Pb(II) adsorption on delta-MnO2 and p-MnO2 followed the pseudo second-order kinetics, and a lower adsorption rate was observed on p-MnO2 than delta-MnO2. The Pb(II) adsorption capacity of p-MnO2 increased with solution pH and co-existing cation concentration, and the presence of dissolved humic acid (10.2 mg L-1) did not markedly impact Pb(II) adsorption. p-MnO2 also displayed good adsorption capacities for aqueous Cu(II) and Cd(II). Findings in this study indicate that p-MnO2 could be used as a highly effective adsorbent for heavy metal ions removal in water. (C) 2017 Elsevier B.V. All rights reserved.; National Natural Science Foundation of China [21277069, 21277066, 21407074]; National Key Basic Research Program of China [2014CB441103]; SCI(E); ARTICLE; 330-338; 406
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473278]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Zhang, Haipeng,Gu, Liqin,Zhang, Ling,et al. Removal of aqueous Pb(II) by adsorption on Al2O3-pillared layered MnO2[J]. APPLIED SURFACE SCIENCE,2017.
APA	Zhang, Haipeng.,Gu, Liqin.,Zhang, Ling.,Zheng, Shourong.,Wan, Haiqin.,...&Xu, Zhaoyi.(2017).Removal of aqueous Pb(II) by adsorption on Al2O3-pillared layered MnO2.APPLIED SURFACE SCIENCE.
MLA	Zhang, Haipeng,et al."Removal of aqueous Pb(II) by adsorption on Al2O3-pillared layered MnO2".APPLIED SURFACE SCIENCE (2017).