title: Enhanced humification by carbonated basic oxygen furnace steel slag--I. Characterization of humic-like acids produced from humic precursors.
abstract: Carbonated basic oxygen furnace steel slag (hereinafter referred to as "steel slag") is generated during iron and steel manufacturing and is often classified as waste. The effect of steel slag on humification process was investigated. Catechol, glycine and glucose were used as model humic precursors from degraded biowastes. To verify that humification occurred in the system, humic-like acids (HLAs) were isolated and characterized structurally by elemental analysis, FTIR spectra, solid-state CP-MAS (13)C NMR spectra, and TMAH-Py-GC/MS. Characteristics of the steel slag-HLA were compared with those of HLAs formed in the presence of zeolite and birnessite, and with that of mature compost humic acid. The results showed that steel slag-HLA, like zeolite- and birnessite-HLA, is complex organic material containing prominent aromatic structures. Steel slag substantially accelerated the humification process, which would be highly significant for accelerating the stabilization of biowastes during composting (e.g. municipal solid waste, sewage sludge, and food waste).
authors: Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, Tsinghua University, Beijing 100084, China.
authors: Guangxia
authors: G
authors: Qi
authors: Dongbei
authors: D
authors: Yue
authors: Masami
authors: M
authors: Fukushima
authors: Shigeki
authors: S
authors: Fukuchi
authors: Yongfeng
authors: Y
authors: Nie
mesh_terms: D006358:Hot Temperature; D006812:Humic Substances / Q000032:analysis*; D007220:Industrial Waste / Q000517:prevention & control*; D008669:Metallurgy; D010100:Oxygen / Q000737:chemistry*; D013232:Steel / Q000737:chemistry*
chemical_list: D006812:Humic Substances; D007220:Industrial Waste; D013232:Steel; D010100:Oxygen