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Characterization of humic acids extracted from the sediments of the variousrivers and lakes in China |
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| Authors: | HE Mengchang SHI Yehong LIN Chunye |
| Affiliation: | State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China. |
| Abstract: | The humic acids (HAs) isolated from the sediments of the various rivers,lakes,and reservoirs in China were studied using elemental analyzer,fourier transform infrared (FT-IR),and CP/MAS 13C nuclear magnetic resonance (NMR) spectroscopy.The results showed that the HAs were characterized by some common chemical and physicochemical properties,but they also pose some differences in the C-containing functional groups.The C/N,C/H,O/C,and O/H ratios differ widely for the various HAs,showing that the elemental comp... |
| Keywords: | CP/MAS 13C NMR spectroscopy elemental analysis fourier transform infrared spectroscopy humic acids surficial sediment structural characteristics |
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