Removal of molybdate from aqueous solution by zero-valent Iron: surface reactions and mechanisms
In the past decades, a sharp enrichment of Mo occurred in some water environments of Mo mining area in China. In this research, batch tests were performed to study the surface reactions of Mo on zero-valent iron. Factors of temperature, pH value, and competing anions were examined. The adsorption isotherms indicate that the process is endothermic. The maximum removal rate was 94％ at pH=2.0, and the removal rate decreased with increase of pH. It was found that competing anions restrained strongly molybdate removal, while cations promoted the removal. Scanning electron microscopy, electron probe microanalysis and X-ray diffraction analysis revealed that adsorption and chemical precipitation mechanisms are involved in the reaction process.
Molybdate Zero-valent iron surface reaction chemical precipitation
X. L. Qiao Y. C. Wang J. W. Chen
Department of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
792-793
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）