| Literature DB >> 26604200 |
Li Zhang1,2,3, Shengrui Wang4,5,6, Lixin Jiao1,2,3, Yanping Li1,2,3, Jiachun Yang1,2,3, Rui Zhang1,2,3, Shuang Feng1,2,3, Juan Wang1,2,3.
Abstract
The nature of the influence of organic matter (OM) on ammonium adsorption in lake sediments remains disputed. In this study, the kinetics and thermodynamics of ammonium adsorption were investigated on sediment samples with different OM contents (ignoring the effects of OM mineralization) previously collected from Lake Wuli, a northern bay of Lake Taihu, a shallow lake in southern China. The mechanisms of ammonium adsorption in these samples were characterized by Fourier transform infrared spectrometry and scanning electron microscopy. The results show that the ammonium adsorption capacity of the sediments is highly correlated with their OM content and with the humic content of the OM. The ammonium adsorption capacity of OM varies with its composition, i.e., with the surface properties of the different functional groups present. Indeed, humic acid was found to have a greater ammonium adsorption capacity by itself than when mixed with kerogen and black carbon, the mixture of the latter two components proving a better adsorbent than pure black carbon.Entities:
Keywords: Adsorption; Ammonium; Fourier transform infrared spectrometry; Organic matter; Scanning electron microscopy; Sediment
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Year: 2015 PMID： 26604200 DOI： 10.1007/s11356-015-5820-9
Source DB: PubMed Journal: Environ Sci Pollut Res Int ISSN： 0944-1344 Impact factor: 4.223