NDLI: Research on hydrophilicity and hydrophobicity of adsorption of NOM on metal oxide/ water interface in different pH values

Content Provider	IEEE Xplore Digital Library
Author	Meng Li Si Wu
Copyright Year	2011
Description	Author affiliation: School of Civil Engineering and Architecture, Wuhan University of Technology, WHUT, China (Meng Li; Si Wu)
Abstract	The hydrophobicity before and after humic acid's adsorption on Fe2O3 nanoparticles in various solution conditions was investigated with FTIR spectrum and thermogravimetric analysis methods. The results showed that, when the ionic strength was kept at 0, 0.005, 0.01 and 0.05mol/kg and pH value was changed from 7 to 12, the thermal weight loss of the complex, which formed after the adsorption of nano Fe2O3 and the dissolved humic acid molecules, decreased at first and then increased as the pH value increased. The hydrophilicity reduced and hydrophobicity enhanced when the pH value increased from 7 to 10, while the hydrophilicity enhanced and hydrophobicity reduced when the pH value increased from 10 to 12. When the ionic strength was 0.001mol/kg, and pH value was changed from 7 to 12, the thermal weight loss of the complex decreased as the pH value increased, which provided the evidence that the hydrophilicity reduced and hydrophobicity enhanced. The FTIR spectrum results indicated that the functional groups, which played a significant role in the hydrophilicity and hydrophobicity of the complex after adsorption process of nano Fe2O3 and the dissolved humic acid molecules, might be hydrophilic hydroxyl-OH, carbonyl C=O and the hydrophobic alkane CH2.
Starting Page	2477
Ending Page	2480
File Size	314386
Page Count	4
File Format	PDF
ISBN	9781424494361
e-ISBN	9781424494392
DOI	10.1109/MACE.2011.5987485
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-15
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature distribution Thermogravimetric analysis Metals Materials Carbon Hydrophilicity and hydrophobicity Nanoparticles Temperature measurement FTIR analyses Absorption Functional groups Humic acid Fe2O3 nanoparticles
Content Type	Text
Resource Type	Article

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