Abstract
Humic acids (HA) and fulvic acids (FA) extracted from refuse in a landfill at different landfill ages were characterized by elemental composition, GPC, FTIR, and 13C CP/MAS NMR. The elemental composition analysis revealed high O/C and low H/C ratios in the FA, indicating a high proportion of O-alkyl and carboxylic acids in the FA. The Mw and Mn values and Mw/Mn ratios indicated that the HA had a higher molecular weight and were more homogeneous with respect to molecular weight. FTIR spectra showed that the FA had relatively more intense bands assigned to aliphatic structures and were abundant in oxygen-containing function groups. The analytical results of 13C CP/MAS NMR suggested that there were more oxygenated aliphatic carbons and fewer aromatic carbons in the FA than in the HA. All the results demonstrated that the degree of humification increased with landfill age.
| Original language | English |
|---|---|
| Pages (from-to) | 1446-1453 |
| Number of pages | 8 |
| Journal | Chemosphere |
| Volume | 69 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Nov 1 2007 |
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All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Chemistry(all)
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
Spectroscopic studies of the progress of humification processes in humic substances extracted from refuse in a landfill. / Chai, Xiaoli; Shimaoka, Takayuki; Cao, Xiaoyan; Guo, Qiang; Zhao, Youcai.
In: Chemosphere, Vol. 69, No. 9, 01.11.2007, p. 1446-1453.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Spectroscopic studies of the progress of humification processes in humic substances extracted from refuse in a landfill
AU - Chai, Xiaoli
AU - Shimaoka, Takayuki
AU - Cao, Xiaoyan
AU - Guo, Qiang
AU - Zhao, Youcai
PY - 2007/11/1
Y1 - 2007/11/1
N2 - Humic acids (HA) and fulvic acids (FA) extracted from refuse in a landfill at different landfill ages were characterized by elemental composition, GPC, FTIR, and 13C CP/MAS NMR. The elemental composition analysis revealed high O/C and low H/C ratios in the FA, indicating a high proportion of O-alkyl and carboxylic acids in the FA. The Mw and Mn values and Mw/Mn ratios indicated that the HA had a higher molecular weight and were more homogeneous with respect to molecular weight. FTIR spectra showed that the FA had relatively more intense bands assigned to aliphatic structures and were abundant in oxygen-containing function groups. The analytical results of 13C CP/MAS NMR suggested that there were more oxygenated aliphatic carbons and fewer aromatic carbons in the FA than in the HA. All the results demonstrated that the degree of humification increased with landfill age.
AB - Humic acids (HA) and fulvic acids (FA) extracted from refuse in a landfill at different landfill ages were characterized by elemental composition, GPC, FTIR, and 13C CP/MAS NMR. The elemental composition analysis revealed high O/C and low H/C ratios in the FA, indicating a high proportion of O-alkyl and carboxylic acids in the FA. The Mw and Mn values and Mw/Mn ratios indicated that the HA had a higher molecular weight and were more homogeneous with respect to molecular weight. FTIR spectra showed that the FA had relatively more intense bands assigned to aliphatic structures and were abundant in oxygen-containing function groups. The analytical results of 13C CP/MAS NMR suggested that there were more oxygenated aliphatic carbons and fewer aromatic carbons in the FA than in the HA. All the results demonstrated that the degree of humification increased with landfill age.
UR - http://www.scopus.com/inward/record.url?scp=35148866206&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=35148866206&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2007.04.076
DO - 10.1016/j.chemosphere.2007.04.076
M3 - Article
VL - 69
SP - 1446
EP - 1453
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
IS - 9
ER -