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Spectroscopic studies of the progress of humification processes in humic substances extracted from refuse in a landfill.
Chemosphere. 2007 Nov; 69(9):1446-53.C

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 (13)C 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 M(w) and M(n) values and M(w)/M(n) 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 (13)C 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.

Authors+Show Affiliations

Chai X
The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200 092, China. xlchai@mail.tongji.edu.cn
Shimaoka T
No affiliation info available
Cao X
No affiliation info available
Guo Q
No affiliation info available
Zhao Y
No affiliation info available

MeSH

BenzopyransChromatography, GelHumic SubstancesMagnetic Resonance SpectroscopyMolecular WeightRefuse DisposalSpectroscopy, Fourier Transform InfraredWater Pollutants, Chemical

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17585995

Citation

Chai, Xiaoli, et al. "Spectroscopic Studies of the Progress of Humification Processes in Humic Substances Extracted From Refuse in a Landfill." Chemosphere, vol. 69, no. 9, 2007, pp. 1446-53.
Chai X, Shimaoka T, Cao X, et al. Spectroscopic studies of the progress of humification processes in humic substances extracted from refuse in a landfill. Chemosphere. 2007;69(9):1446-53.
Chai, X., Shimaoka, T., Cao, X., Guo, Q., & Zhao, Y. (2007). Spectroscopic studies of the progress of humification processes in humic substances extracted from refuse in a landfill. Chemosphere, 69(9), 1446-53.
Chai X, et al. Spectroscopic Studies of the Progress of Humification Processes in Humic Substances Extracted From Refuse in a Landfill. Chemosphere. 2007;69(9):1446-53. PubMed PMID: 17585995.
* Article titles in AMA citation format should be in sentence-case
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, Y1 - 2007/06/21/ PY - 2007/02/02/received PY - 2007/04/22/revised PY - 2007/04/23/accepted PY - 2007/6/26/pubmed PY - 2008/1/8/medline PY - 2007/6/26/entrez SP - 1446 EP - 53 JF - Chemosphere JO - Chemosphere VL - 69 IS - 9 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 (13)C 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 M(w) and M(n) values and M(w)/M(n) 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 (13)C 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. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17585995/Spectroscopic_studies_of_the_progress_of_humification_processes_in_humic_substances_extracted_from_refuse_in_a_landfill_ DB - PRIME DP - Unbound Medicine ER -