亚铁氰化铜的制备及其对铯的吸附.pdf

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ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
2015年第35卷第1期
亚铁氰化铜的制备及其对铯的吸附
韩非·2,3,侯若昕3,顾平3
(1.河北工业大学土木工程学院,天津300401;2.河北省士土木工程技术研究中心,天津300401;
3.天津大学环境科学与工程学院,天津300072)
[摘要]以亚铁氧化钠和硝酸铜为原料,采用水热合成法制备出亚铁氰化铜(CuFC)吸附剂,对其进行了表征,
并考察了CuFC对模拟放射性废水中铯的吸附性能。表征结果显示:产物的分子式为Cu2Fe(CN)。7H2O,外观
为具有清晰几何形状的颗粒物,粒径约为30nm。25℃下的静态吸附实验结果表明:当初始铯质量浓度为98.01
ugL、CuFC加人量为0.08g兀L、吸附时间为90min时,达到吸附平衡,铯的去污系数达到1.13x10°;用拟二级动
力学模型可准确描述CuC对铯的吸附过程,相关系数为1.0000;吸附等温线符合 Freundlicha等温吸附模型。
[关键词了亚铁氰化铜;铯;放射性废水;静态吸附;吸附等温线;吸附动力学
中图分类号]X703[文献标志码]A[文章编号]1006-1878(2015)01-0084-05
Preparation of Cupric Ferrocyanide and Adsorption of Cesium
Han Fo:. 2.3 Hou Ruoxin, Gu Ping
(I. School of ivil Engineering, Hebei University of Technology, Tianjin 300401, China
2. Civil Engineering Technology Research Center of Hebei Province, Tianjin 300401, China;
School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China)
Abstract: Cupric ferrocyanide(CUF)was prepared as an adsorbent by hydrothermal synthesis method using sodium
ferrocyanide and cupric nitrate as raw material. The product was characterized and the adsorption properties of CUFC to
cesium in the simulated radioactive wastewater were studied. The characteristic results show that the molecular formula
of the product is Cu Fe(CN) 7H O, and the CUFC particles have clear geometric shapes with a single particle size of
approximately 30 nm. The experimen al results of static adsorption under 25 T show that: the cesium decontamination
factor is 1.13 10 when the initial cesium mass concentration is 98.01 ug/, the CUFC dose is 0.08 g/L and the
adsorption time is 90 min The adsorption process of cesium on CUFC can be best described by a pseudo-second order kinetic
model with 1. 000 0 of the comelation efficien; The aso on iso em fits to Frundlich isothermal adsorption model
Key words: cupric ferrocyanide; cesium; radioactive wastewater; static adsorption; adsorption isotherm; adsorption
kinetic
核电站的运行(包括核事故的发生)过程中会有机吸附剂或生物吸附剂,无机吸附剂具有机械、
产生放射性废水。2011年日本核事故产生的放射性热、辐照稳定性强的优点,且结晶无机物中拥有更
污染至今仍被广范关注。含放射性同位素铯的均匀的离子交换位,因而对某些元素具有显著的选
废水在放射性废水中占有很大的比例。绝的半衰期择性。过渡金属的亚铁化物对铯的选择性吸
长(cs的42为30a,cs的h为3x10°a),是附能力很强,制备颗粒尺寸适宜、吸附动力学性
Y射线的主要放射源,对人体危害性大?。目前,
常用的含铯废水处理方法有化学沉淀法?、离子交
[收稿日期]2014-08-18;[修订日期]2014-10-28。
换法-?、吸附法1、膜法
[10-11]
[作者简介]韩非(1981-),男,黑龙江省鹤岗市人,博士,
、生物法2等。
讲师,电话022-60435990,电邮hanfei777126.com。
其中,吸附法具有高效、易操作、成本低等优点,
基金项目]河北省建设科技研究项目(2014-233);河北T业大
而吸附剂的选择对于该法的应用至关重要。相对于学教育教学改革项目(2013-123)。