XIAOGu-qing.Fe3+-loaded D113 as a Salt?resistance Resin for Glyphosate Adsorption in Water[J].China Water & Wastewater,2025,41(5):95-101.
Fe3+-loaded D113 as a Salt?resistance Resin for Glyphosate Adsorption in Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第5期
Page:
95-101
Column:
Date of publication:
2025-03-01
- Keywords:
- resin; glyphosate; Fe3+-loaded D113; salt resistance; adsorption
- Abstract:
- D113 resin was modified with FeCl3 to produce Fe3+-loaded D113 resin (hereafter referred to as R-Fe). This study investigated the performance and mechanism of salt resistant R-Fe for glyphosate adsorption in water. The Fe3+ content in R-Fe was quantified as 1.94 mmol/g using inductively coupled plasma spectrometry (ICP). The adsorption capacity of R-Fe for glyphosate exceeded that of D113 resin, as well as D113 resin loaded by Al3+ and Ni2+. When the mass fraction of NaCl in the glyphosate aqueous solution ranged from 0 to 16%, the adsorption capacity of R-Fe for glyphosate remained within the range of 102.2 mg/g to 105.1 mg/g. This indicateed that R-Fe had superior salt resistance and stable adsorption performance of glyphosate compared to 330, D301, and 13 other adsorbents reported in the literature. When the pH of the glyphosate solution was 2.77, glyphosate predominantly existed in the ionization equilibrium associated with pKa2. Under these conditions, the adsorption capacity of glyphosate by R-Fe reached its maximum value of 105.1 mg/g. The adsorption mechanism of R-Fe on glyphosate involved Fe3+ in R-Fe forming coordination bonds with the oxygen atoms of the phosphonic acid group in glyphosate.
Last Update:
2025-03-01