D151 resin preloaded with Fe3+ [denoted as R-Fe3+] was to investigate R-Fe3+ as an adsorbent for glyphosate from water in the presence high concentration of salt. The adsorption mechanism revealed the coordination of Fe3+ inside R-Fe3+ with O atoms of P-O and N atoms in glyphosate molecule. The adsorption capacity of glyphosate by R-Fe3+ was much larger than that of D151 resin preloaded with Ni2+, Cu2+, Na+ and H+. Even in glyphosate solutions containing 16% NaCl, R-Fe3+ showed the constant adsorption capacity of glyphosate. The result provided the first evidence of R-Fe3+ as a salt resistant adsorbent for glyphosate. The adsorption capacity of glyphosate was the maximum at pH 3.35. The adsorption thermodynamics showed that the adsorption of glyphosate by R-Fe3+ was the ligand exchange of glyphosate and water. The maximum coordination ratio of glyphosate to Fe3+ inside R-Fe3+ was 1:1. The maximum adsorption capacity of glyphosate by R-Fe3+ was up to 481.85 mg/g, which is much higher than that of other reported adsorbents in the presence 16% NaCl. 2 mol/L NaOH, 2 mol/L H2SO4 and 2 mol/L Fe2(SO4)3 could all be used to achieve over 97% regeneration of R-Fe3+.

中文翻译：

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在含有16％NaCl的情况下，D151树脂预载有Fe3 +作为草甘膦的抗盐吸附剂。

预装了Fe3 +的D151树脂[表示为R-Fe3 +]用于研究R-Fe3 +作为高浓度盐存在下水中草甘膦的吸附剂。吸附机理揭示了R-Fe3 +中Fe3 +与草甘膦分子中PO的O原子和N原子的配位作用。R-Fe3 +对草甘膦的吸附能力比预装有Ni2 +，Cu2 +，Na +和H +的D151树脂要大得多。即使在含有16％NaCl的草甘膦溶液中，R-Fe3 +也显示出恒定的草甘膦吸附能力。结果提供了R-Fe3 +作为草甘膦的耐盐吸附剂的第一个证据。草甘膦的吸附容量在pH 3.35时最大。吸附热力学表明，R-Fe3 +对草甘膦的吸附是草甘膦与水的配体交换。R-Fe3 +中草甘膦与Fe3 +的最大配位比为1：1。R-Fe3 +对草甘膦的最大吸附容量高达481.85 mg / g，比在16％NaCl存在下的其他报道的吸附剂要高得多。2 mol / L NaOH，2 mol / L H2SO4和2 mol / L Fe2（SO4）3均可用于实现97％以上的R-Fe3 +再生。