Porous silica with a large specific surface area (SSA）was prepared from rice husk char (RHC）by adding H3PO4 to sodium silicate solution (SSS）until the solution reached pH 4.1.The preparation process consisted of formation of SSS from RHC

that of silica-polyethylene glycol (PEG）composite by using SSS

H3PO4 and PEG

and calcination of the composites.The porous silica as-prepared was characterized by N2 adsorption

X-ray fluorescence

X-ray energy dispersive spectrometer

X-ray diffraction

and Fourier transform infrared spectroscopy.Their characters for Cu（Ⅱ）adsorption were investigated by batch adsorption experiments.The results show that amorphous silica with specific surface area of 957 m2·g-1and silica content of 99.26% can be obtained from rice husk char within 10 h.The porous silica contains both micropores and mesopores

with the mesopore fraction up to 38.6%.The advisable contact time and solution pH for Cu（Ⅱ）adsorption required are higher than 2 h and 6.0

respectively.The largest adsorption capacity and highest removal efficiency for Cu（Ⅱ）at initial Cu（Ⅱ） 中图分类号:  10.3969/j.issn.0438-1157.2011.12.019 引用本文 李大伟，陈登宇，朱锡锋. 稻壳炭基高比表面多孔氧化硅的表征及Cu（Ⅱ）吸附特性[J]. CIESC Journal. Characterization and Cu（Ⅱ）adsorption property of rice-husk-char-based porous silica with large specific surface area[J]. . 使用本文 0     /   /   推荐 导出引用管理器 EndNote|Ris|BibTeX 链接本文: https://hgxb.cip.com.cn/CN/                https://hgxb.cip.com.cn/CN/Y2011/V62/I12/3434