Adsorptive behaviors of humic acid onto freshly prepared hydrous manganese dioxides

2007年第1卷第2期

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《环境科学与工程前沿（英文）》 >> 2007年第1卷第2期 doi: 10.1007/s11783-007-0041-1

Adsorptive behaviors of humic acid onto freshly prepared hydrous manganese dioxides

1.School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China; 2.College of Civil Engineering and Architecture, Beijing University of Technology, Beijing 100022, China; 3.Tianjin Water Supply Group Co. Ltd, Tianjin 300040, China;

发布日期： 2007-06-05

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摘要

This study focused on the adsorptive behaviors of humic acid onto freshly prepared hydrous MnO(s) (δMnO), and investigated the feasibility of employing δMnO for humic acid removal from drinking water. Effects of such parameters as molecular mass of humic acid, kinds of divalent cations on adsorptive behaviors and possible mechanisms involved were investigated. This study indicated that humic acid with higher molecular mass exhibited more tendency of adsorbing onto &MnO than that with lower molecular mass. Ca facilitated more humic acid adsorption than Mg; UV-Vis spectra analysis indicated higher capabilities of Ca coordinating with acidic functional groups of humic acid than that of Mg. Additionally, ζ potential characterization indicated that Ca showed higher potential of increasing ζ potential of &MnO than Mg. Ca of 1.0 mmol/L increased ζ potential of δMnO

关键词

Mg ; molecular ; functional ; UV-Vis spectra ; prepared hydrous