La3+ and Al3+ loaded D151 resin [R-La and R-Al, respectively] were used as salt-resistant resins for the efficient adsorption of glyphosate. The results showed that La3+ with a larger ionic radius could accommodate more glyphosate as ligands, resulting in higher glyphosate adsorption capacity of R-La than that of R-Al. Both R-La and R-Al exhibited maximum adsorption capacities at pH 2.52, where glyphosate existed in its ionization equilibrium of pKa2. Consistent with the larger ionic radius of La3+, R-La featured larger qm and KL than R-Al at t...
