title: Characterization of water-extractable organic matter during the biostabilization of municipal solid waste.
abstract: For the purpose of characterizing the evolution of water-extractable organic matter (WEOM) during the biostabilization of municipal solid waste (MSW) and investigating the correlation between biostability and WEOM characteristics, this study conducted 100-day investigation on biostabilization of MSW and applied various analytical approaches to characterize WEOM. The results showed that the respirometric activity of MSW was reduced by 93% to 10.7 mg kg(-1), and the dissolved organic carbon concentration of WEOM kept steady at around 4.0 g kg(-1) after day 44, when the MSW was considered to be stabilized. Moreover, the aromaticity of WEOM significantly increased and the high-molecular weight fraction became the main part of WEOM. Being highly related to the biostability of MSW, the excitation-emission matrix spectra indicated the stability by the fluorescence regional integration technique either by the presence of specific Ex/Em maxima (with wavelength pair of approximately 288/455) or by the rapid increase of normalized excitation-emission area volumes with respect to the humic substances.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, PR China.
authors.forename: Zheng-Hao
authors.initials: ZH
authors.lastname: Shao
authors.forename: Pin-Jing
authors.initials: PJ
authors.lastname: He
authors.forename: Dong-Qing
authors.initials: DQ
authors.lastname: Zhang
authors.forename: Li-Ming
authors.initials: LM
authors.lastname: Shao
mesh_terms: D002244:Carbon / Q000032:analysis; D002947:Cities; D005470:Fluorometry; D006812:Humic Substances / Q000032:analysis*; D006841:Hydrocarbons, Aromatic / Q000032:analysis; D008970:Molecular Weight; D014865:Waste Disposal, Fluid / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D006812:Humic Substances; D006841:Hydrocarbons, Aromatic; D014867:Water; D002244:Carbon