Hezavalent Chromium Removal from Water Using Chitosan-Fe0 Nanoparticles
Chitosan-Fe0 nanoparticles (chitosan-Fe0) were prepared using nontoxic and biodegradable chitosan as a stabilizer. Laboratory batch and column experiments were conducted to investigate the feasibility of using chitosan-Fe0 for in situ reductive removal of Cr(Ⅵ) from water. Batch kinetic tests indicated that the overall disappearance of Cr(Ⅵ) may include both physical adsorption of Cr(Ⅵ) onto the chitosan-Fe0 surface and subsequent reduction of Cr(Ⅵ) to Cr(Ⅲ). The rate of reduction of Cr(Ⅵ) to Cr(Ⅲ) can be expressed by a pseudo-first-order reaction kinetics and the rate constants increase with the increase in iron loading. Cohirm experiments indicated that the chitosan-Fe0 were highly deliverable in the column. When the column was treated with Cr(Ⅵ)-contaminated deionized water, the removal capacity of chitosan-Fe0 was found to be about 32 mg Cr/g Fe(0). A 25% drop in the Cr(Ⅵ) removal capacity was found when treated with Cr(Ⅵ)-contammated surface water.
LI Tielong GENG Bing ZHANG Na JIN Zhaohui QI Xinhua
College of Environmental Science and Engineering/Tianjin Key Laboratory of Environmental Remediation Institute of Environment and Sustainable Development in Agriculture,The Chinese Academy of Agricultu
国际会议
The 8th China International Nanoscience and Technology Symposium(2009第八届中国国际纳米科技湘潭研讨会Cinsts09)
湖南湘潭
英文
1-8
2009-10-23（万方平台首次上网日期，不代表论文的发表时间）