Xinhong Qiu, Keiko Sasaki
The sorption of borate by ion exchange using a traditional layered double hydroxide (LDH) is affected by external conditions such as coexisting anions. Hydrotalcite intercalated with d-gluconate (G-LDH) was synthesized through a one-step microwave-assisted treatment and characterized by XRD, TEM, FTIR, TG/DTA and two-dimensional 1H NMR. Several factors that influence sorption of borate were investigated: gluconate content in the G-LDH dosage, coexisting anions, initial pH of borate solution and sorption temperature. The synthesized adsorbent exhibited a greater borate sorption rate than the traditional hydrotalcite (No3-LDH) or a boron-specific resin. The maximum sorption capacity was 12.7 mmol/g (obtained by fitting the Langmuir model). The G-LDH sorption density increased with increasing initial borate concentration and adsorbent dosage. In the presence of 50 mM sulfate, sorption of borate by No3-LDH significantly decreased and no obvious sorption could be observed, whereas the sorption mechanism of borate by G-LDH is mainly through bischite and monodentate types of complexation with borate. This mechanism is similar to that of CR805, and fundamentally different from the No3-LDH.
@article{4d012197-334b-4a99-939e-9eab7150abe0,
title={One step synthesis of layered double hyd},
author={Xinhong Qiu and Keiko Sasaki},
year={2026},
language={en}
}TY - JOUR TI - One step synthesis of layered double hyd AU - Xinhong Qiu AU - Keiko Sasaki PY - 2026 LA - en ER -
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