武慧论文被 ACS Earth and Space Chemistry 接收
武慧等关于长期覆土对铁尾矿矿物风化、有机质累积及覆土质量影响的研究被 ACS Earth and Space Chemistry 接收。
武慧论文 Decade-Long Soil Cover Promotes Mineral Weathering and Organic Matter Accrual in Fe Ore Tailings But Deteriorates Topsoil 被 ACS Earth and Space Chemistry 接收。
作者： H Wu, W Fu, Z Yang, C Lu, S Chen, Y Wu, Y Liu, M Wang, CW Kao, TS Chan, B Chen, S Wu
期刊： ACS Earth and Space Chemistry, 2026
Soil cover is widely adopted to initiate ecological rehabilitation on tailing deposits, yet its influence on geochemical processes and organic matter (OM) dynamics in underlying tailings remains poorly understood. This study investigated the physicochemical and mineralogical evolution of iron (Fe) ore tailings in Hebei Province, China, following a decade of soil cover and revegetation.
The results show that soil cover and revegetation generally neutralized alkalinity, fostered microaggregate formation, and improved OM stabilization in the underlying tailings. Synchrotron-based Fe K-edge X-ray absorption spectroscopy (XAS) identified transformation of primary biotite-like minerals into Fe(III) oxyhydroxides. Nanoscale secondary ion mass spectrometry further delineated the submicrometer association of these secondary Fe- and Al-bearing minerals with OM, supporting the mechanism of OM stabilization.
Notably, grass rehabilitation was more effective than cropland in driving these processes. At the same time, the underlying tailings negatively affected the soil cover, increasing alkalinity and metal(loid) concentrations while reducing total organic carbon, nitrogen, and aggregate stability relative to natural soils. These findings indicate that soil cover and revegetation can partially ameliorate unfavorable conditions in Fe ore tailings, but an integrated strategy is needed to preserve the functional stability of the whole soil-tailings profile.