Nanosilver Particles Removal by Aluminum Sulfate in Water Coagulation Process
Concerns have been raised about potential adverse effects of silver nanoparticles (AgNPs) on human health and the environment,as the widely use leads to AgNPs release into the environment.It is necessary to find out if traditional water treatment processes can effectively remove AgNPs.In this study,the removal of AgNPs by the coagulation process using aluminum sulfate was investigated.The coagulation conditions,including the dosages of the coagulants and solution pH,were optimized based on the removal efficiency of AgNPs.Results showed that AgNPs could be effectively removed at pH 5~8,and the best removal efficiency was 97.3% with 495mg/L aluminum sulfate at pH 7.5.Transmission electron microscope image and X-ray diffraction spectra showed the formation of AgNPs in the coagulation flocs,indicating the coagulation was the major AgNPs removal mechanism.The results of this study will contribute to further research on the reduction of the risk of nanoparticles in the environment.
silver nanoparticle coagulation process removal mechanism ion release
TANG Ting YUAN Zhihua HU Youbiao YU Changping
College of Earth and Environment, Anhui University of Science & Technology, Huainan 232001; Key Labo Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of S College of Earth and Environment, Anhui University of Science & Technology, Huainan 232001
国际会议
合肥
英文
326-331
2012-05-24（万方平台首次上网日期，不代表论文的发表时间）