Dawei QIN, Hongxin LI, Xia NIU, Min QIAO, Xiaotong YUAN, Gang LIU

A promising materials approach to combatting renal hyperphosphatemia: Fe(II)-montmorillonites

The objective of the current effort was to determine the efficacy of Fe(II)-montmorillonite (Fe(II)-MMT) as an adjuvant for speci c targeted adsorption of phosphate. Speci cally, Fe(II)-MMT was studied to combat hyper- phosphatemia and anemia arising from chronic renal failure. The adsorption of phosphate over time, pH, and initial concentration was studied. The systems were characterized by X-ray diffraction (XRD), Raman, and zeta potential. The experimental results demonstrated the adsorption time was set to 140 min to achieve maximum adsorption effi- ciency. It was thus found that the maximum adsorption was at pH 3.0. In addition, it reached equilibrium when the initial phosphate concentration was at 60 mg/L while the maximum adsorption capacity was 5.75 mg of phosphate/g of Fe(II)-MMT. On the other hand, adsorption isotherms showed that the Langmuir model was better than the Freundlich model. This means that the adsorption of the phosphate on Fe(II)-montmorillonites was monolayer adsorption, and the phosphate was successfully adsorbed either onto the surface or intercalated within interlayer volume. Live experiments supported the ability of Fe (II)-MMT to control hyperphosphatemia and treat chronic renal failure.

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ISSN: 1300-0527
Yayın Aralığı: 6
Yayıncı: TÜBİTAK

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