RESEARCH ON PREPARATION OF NANOSCALE IRON SUPPORTED BYBENTONITE AND ITS REMEDIATION OF LEAD IONS

Digest Journal of Nanomaterials and Biostructures

C. Yu¹ 

关键词: Bentonite;    Nano iron;    lead;    Support;    Removal rate;    iron content;   

DOI  :  

学科分类：生物技术

来源: Institute of Materials Physics

【 摘 要 】

Nano iron supported by bentonite is made by a liquid phase reduction method in thisresearch. Through X-ray techniques (XRD), Fourier transform infrared spectroscopy(FTIR), BET, Lorentz-transmission electron microscope (TEM) and other methods, themicrostructures and the chemical composition are characterized. And experiments ofremoving lead ions are also carried out to find a suitable mixture ratio. The results showthat most made-up nano iron, with spherical particles of below 70nms, uniformly dispersein bentonite which can increase the specific area of synthetic material so as to solve thenano iron agglomeration and oxidation problems in air. By comparison, nano ironsupported by bentonite has a much larger removal rate for lead ions than that of bentonitein the same environment. 30%-40% iron content of bentonite-supported nanometer iron(B-nZVI) has the highest removal rate of lead ions. In an acidic environment, the removalrate of lead ions by bentonite and B-nZVI increases with the increase of pH value. At pH 7the removal rate of lead ions by B-nZVI is over 95%, while the removal rate of lead ionsby bentonite is 81%.

【 授权许可】

Unknown