D113 resin in-situ loaded with Fe3+ to develop glyphosate adsorbent with the characteristics of salt-resistance and the remarkable saturated adsorption capacity

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED Reactive & Functional Polymers Pub Date : 2024-08-28 DOI:10.1016/j.reactfunctpolym.2024.106031

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Abstract

There are inorganic salts in glyphosate production liquor and natural water bodies coexisting with glyphosate. It is imperative to develop a salt-tolerant adsorbent for glyphosate in water. Industrial D113 resin undergone two-step transformation to optimize the preparation of D113 in-situ loaded with Fe³⁺ (D113-Fe³⁺) as salt-resistance glyphosate adsorbent. The loading amount of Fe³⁺ on D113-Fe³⁺ is 3.5 mmol/g. The adsorption mechanism revealed that Fe³⁺ in D113-Fe³⁺ formed Fe-O-P bond with the phosphonate group of glyphosate. At 293 K, the maximum complex ratio of the adsorbed glyphosate to Fe³⁺ in D113-Fe³⁺ was 2.4:1. At 293 K, the remarkable saturated glyphosate adsorption capacity of D113-Fe³⁺ reached 1420.2 mg/g. In pK₂ state of glyphosate, D113-Fe³⁺ featured its maximum adsorption capacity at the zero charge point 2.43 of D113-Fe³⁺ and 293 K. In glyphosate solution coexisting 0–16 % NaCl, D113-Fe³⁺ exhibited stable glyphosate adsorption capacity and salt-resistance compared with D201, D301 and 330 resin. The endothermic and spontaneous adsorption of glyphosate on D113-Fe³⁺ can fit Freundlich model and pseudo-second-order model. 2 mol/L NH₃·H₂O, 2 mol/L FeCl₃ and 2 mol/L H₂SO₄ could all regenerate D113-Fe³⁺. The characteristics of salt-resistance and the remarkable saturated adsorption capacity made D113-Fe³⁺ comparable to all reported glyphosate adsorbents.

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原位负载 Fe3+ 的 D113 树脂开发出具有抗盐特性和显著饱和吸附能力的草甘膦吸附剂

草甘膦生产废液和天然水体中都含有与草甘膦共存的无机盐。因此，开发一种耐盐的草甘膦吸附剂势在必行。工业用 D113 树脂经过两步转化，优化制备了原位负载 Fe3+（D113-Fe3+）的 D113，作为耐盐草甘膦吸附剂。D113-Fe3+的Fe3+负载量为3.5 mmol/g。吸附机理表明，D113-Fe3+ 中的 Fe3+ 与草甘膦的膦酸基形成了 Fe-O-P 键。在 293 K 时，D113-Fe3+ 中草甘膦与 Fe3+ 的最大吸附络合比为 2.4:1。在 293 K 时，D113-Fe3+ 对草甘膦的饱和吸附量达到 1420.2 mg/g。在草甘膦的 pK2 状态下，D113-Fe3+ 在 D113-Fe3+ 的零电荷点 2.43 和 293 K 时具有最大吸附容量。在含有 0-16 % NaCl 的草甘膦溶液中，D113-Fe3+ 与 D201、D301 和 330 树脂相比，具有稳定的草甘膦吸附容量和抗盐性。草甘膦在 D113-Fe3+ 上的内吸热和自发吸附符合 Freundlich 模型和伪二阶模型。2 mol/L NH3-H2O、2 mol/L FeCl3 和 2 mol/L H2SO4 都能使 D113-Fe3+ 再生。D113-Fe3+的耐盐性和显著的饱和吸附容量使其可与所有已报道的草甘膦吸附剂相媲美。

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来源期刊

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.