Purpose: Advanced knowledge of the binding of dissolved organic matter (DOM) with aluminum (Al) ions is essential for understanding the toxicity, mobilization, and fate of Al in acidic soils. Materials and methods: In this study, parallel factor analysis (PARAFAC) and two-dimensional correlation spectroscopy (2D-COS) were combined to characterize the Al(III)-binding properties of DOM extracted from farmland topsoil (0–20 cm) subjected to long-term application of chemical fertilizers (CF) or manure (M). Results and discussion: The total Al conc...
