Surface Modification of Silica Fume and Adsorption Property of Pb (II) ions

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Zhang, Yaoyao^1,2 ; Li, Mengyao^1,2 ; Wang, Wei^1,3 ; Du, Hui^1

School of Environmental Science and Engineering, Chang' An University, Xi'an

710054, China^1

Kay Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Xi'an

710054, China^2

Shaanxi Key Laboratory of Land Consolidation, Xi'an

710054, China^3

关键词: Absorption rates;    Adsorbent dosage;    Adsorption properties;    Adsorption rates;    Initial concentration;    Lead ions;    Mercaptopropyltrimethoxysilane;    Modified silica;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/5/052022/pdf
DOI  :  10.1088/1757-899X/394/5/052022

来源: IOP

【 摘 要 】

In order to recycle the industrial waste, silica fume of industrial waste was modified with r-mercaptopropyltrimethoxysilane coupling agent (KH590). The adsorption of modified silica fume on lead ions (Pb2+) was studied. The structures were characterized by FTIR and X-ray photoelectron spectroscopy (XPS). FTIR showed that the surface of silica fume was successfully grafted with KH590. XPS showed that the Pb2+ adsorbed on the surface of modified silica fume with coordination Pb-S bond. The effects of reaction time, Pb2+ initial concentration, pH value and adsorbent dosage on the adsorption rate were investigated. The results showed that silica fume modified by KH590 was an efficient lead ion adsorbent and the absorption rate of modified silica fume was up to 96.7%.