title: Physicochemical and spectroscopic characteristics of dissolved organic matter extracted from municipal solid waste (MSW) and their influence on the landfill biological stability.
abstract: For the purpose of evaluating the stability of municipal solid waste (MSW) excavated from a landfill, dissolved organic matter was extracted and characterized by physicochemical and spectroscopic methods. Results showed that dissolved organic carbon concentration, ratio of dissolved organic carbon to dissolved organic nitrogen, and specific ultraviolet absorbance at 254 nm were in the range of 0.383-3.502 g kg(-1), 0.388-3.693 and 2.700-4.629 L mg(-1) m(-1), respectively, indicating the stability of MSW. Results obtained from Fourier transform infrared spectra have demonstrated that the stability of excavated MSW was characterized by disappearance of some easily biodegradable compounds; and the 1635/1406 ratio varied from 0.979 to 1.840 and was higher than that of the matured compost. The excitation-emission matrix spectra have shown that the principal components in excavated MSW comprised humic substances and the MSW was stable by the presence of a peak with wavelength pair of ∼280/420 nm.
authors.affiliation: School of Environment, Beijing Normal University, Beijing, China.
authors.forename: Xiao-Song
authors.initials: XS
authors.lastname: He
authors.forename: Bei-Dou
authors.initials: BD
authors.lastname: Xi
authors.forename: Zi-Min
authors.initials: ZM
authors.lastname: Wei
authors.forename: Yong-Hai
authors.initials: YH
authors.lastname: Jiang
authors.forename: Chun-Mao
authors.initials: CM
authors.lastname: Geng
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Ying
authors.initials: Y
authors.lastname: Yuan
authors.forename: Hong-Liang
authors.initials: HL
authors.lastname: Liu
mesh_terms: D006812:Humic Substances / Q000032:analysis*; D008422:Materials Testing; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000032:analysis / Q000737:chemistry*; D012995:Solubility; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D006812:Humic Substances; D012722:Sewage; D012996:Solutions; D014874:Water Pollutants, Chemical