Feb 20, 2020 · Introduction. Aluminium (Al) is the most widely distributed metal in the environment (Delhaize and Ryan, 1995 Ranjbar et al., 2008 Exley and House, 2011) occurring naturally in the trivalent state (Al+3) as silicates, oxides and hydroxides, but may combine with other elements such as chlorine, sulphur, fluorine, as well as form complexes with organic …
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