A reusable macroporous phosphorus-containing polybenzoxazine(P/PBOZ) resin was prepared as sorbent material for the removal of iron(Ⅲ) (Fe3+)and chromium(VI) (Cr6+) ions.For this purpose,the resin was obtained from the synthetic P/PBOZ monomer which cured in solvent-free condition by thermally activated ring-opening polymerization,and analyzed its properties by differential scanning calorimetry (DSC),thermogravimetry (TG) and BET method.It was found that the thermal stability and specific surface area of the resin could be improved by introducing P into resin.Adsorption experiments showed that the material had certain adsorption effect on Fe3+ and Cr6+ ions.As evidenced by FT-IR spectral analysis,the chemisorption was attributed to the coordination system formed between free OH and tertiary amino groups in the PBOZ structure and metal ions.It was also demonstrated that the porous PBOZ can be regenerated simply by treatment with nitric acid,and reused for the sorption of Fe3+ and Cr6+ ions effectively.
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基金资助
国家自然科学基金地区基金项目(21564003和52162013)
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