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《China Powder Science and Technology》 2017-01
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Nano zero-valent iron preparation by using method of liquid phase reduction and its removal to Pb~(2+)

CHEN Yang;ZHU Jian;WANG Ping;YANG Lanpeng;YANG Yuzhong;TAN Rong;College of Environment Science and Engineering,Central South University of Forestry and Technology;  
In order to clarify the removal effect and mechanism of Pb~(2+)from water,the nano zero-valent iron(NZVI) was prepared by the method of liquid phase reduction. NZVI was prepared by liquid phase reduction with addition of organic polymer material. The characteristics of NZVI was investigated using scanning electron microscope(SEM) and X-ray diffraction(XRD). The experiment was conducted to investigate the influence of initial ion concentration and solution initial p H value on removal of Pb~(2+)with time changing, and clarify the removal effect and mechanisms of Pb~(2+)from water using NZVI. The results show that the reaction equilibrium achieves within 120 min and the removal rate of Pb~(2+)is more than 99% when the Pb~(2+)initial concentration is 50 and 100mg/L and the addition of NZVI is 1 g/L. The removal ratio of Pb~(2+)increased from 41.47% to 73.58% while solution initial p H value increase from 2 to 3, and from 73.58% to 92.62% initial p H value from 3 to 4. The results also indicate that the removal of Pb~(2+)by NZVI is suitable for pseudo second-order model and it is mainly conducted by the redox reaction and co-precipitation.
【Fund】: 湖南省高校创新平台开放基金项目 编号:13K070 15K147;; 湖南省重点研发计划项目 编号:2015SK20043 2016SK2030;; 湖南省环境保护科技计划项目编号 湘财建指[2014]287号;; 湖南省优秀博士学位论文获得者科研项目 编号:YB2015B031;; 中南林业科技大学引进高层次人才科研启动基金项目 编号:0369;; 湖南省环境科学重点学科建设基项目金 编号:2310006
【CateGory Index】: X52
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