| 水溶性富勒烯对U(VI)在氧化多壁碳纳米管上吸附的影响 |
| |
| 引用本文： | 王婧,张志宏,刘鹏,李湛,吴王锁,高召永,王虹,马丽,王敏,庞登科.水溶性富勒烯对U(VI)在氧化多壁碳纳米管上吸附的影响[J].盐湖研究,2019,27(3):35-43. |
| |
| 作者姓名： | 王婧 张志宏 刘鹏 李湛 吴王锁 高召永 王虹 马丽 王敏 庞登科 |
| |
| 作者单位： | 中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁 810008;青海省盐湖资源化学重点实验室,青海西宁 810008,中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁 810008;青海省盐湖资源化学重点实验室,青海西宁 810008,兰州大学核科学与技术学院,放射化学与核环境研究所,甘肃兰州 730000,兰州大学核科学与技术学院,放射化学与核环境研究所,甘肃兰州 730000,兰州大学核科学与技术学院,放射化学与核环境研究所,甘肃兰州 730000,青海大学,青海西宁 810008,青海大学,青海西宁 810008,青海大学,青海西宁 810008,中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁 810008;青海省盐湖资源化学重点实验室,青海西宁 810008,中国科学院青海盐湖研究所,中国科学院盐湖资源综合高效利用重点实验室,青海西宁 810008;青海省盐湖资源化学重点实验室,青海西宁 810008 |
| |
| 基金项目： | 青海省科技厅自然科学基金青年项目(2015-ZJ-945Q) |
| |
| 摘 要： | 采用静态试验法研究了水溶性富勒烯对U(VI)在氧化多壁碳纳米管上吸附的影响。结果表明,羟基化富勒烯(C60(OH)n)和羧基化富勒烯(C60(C(COOH)2)n)的加入对U(VI)在氧化多壁碳纳米管上的吸附量影响作用类似。在pH<3范围内,羟基化富勒烯和羧基化富勒烯对吸附几乎没有影响,在pH>3以后,二者开始抑制碳纳米管对U(VI)的吸附。较低浓度(10 mg/L)的C60(OH)n对U(VI)的吸附几乎没有影响。而等量的C60(C(COOH)2)n已呈现出明显的抑制作用。但两者的作用机理不同,前者可能是由于羟基化富勒烯和U(VI)竞争氧化多壁碳纳米管上的吸附位点造成的,后者则可能改变了氧化多壁碳纳米管的表面电荷。用双位点模型对不同固液比和U(VI)初始浓度下U(VI)的吸附率随C60(OH)n和C60(C(COOH)2)n初始浓度的变化进行了拟合得到了很好的结果。
|
| 关 键 词： | 羟基化富勒烯 羧基化富勒烯 U(VI) 吸附 氧化多壁碳纳米管 |
| 收稿时间： | 2018/12/4 0:00:00 |
| 修稿时间： | 2018/12/21 0:00:00 |
Abstract: The adsorption of U(VI) on oxidized multi-walled carbon nanotubes (oMWCNTs) as a function of contact time, pH, ionic strength, temperature, and two kinds of soluble fullerene ( i.e. hydroxylated fullerene (C60(OH)n) and carboxylated |
| |
| WANG Jing,ZHANG Zhi-hong,LIU Peng,LI Zhan,WU Wang-suo,GAO Zhao-yong,WANG Hong,MA Li,WANG Min and PANG Deng-ke.Abstract: The adsorption of U(VI) on oxidized multi-walled carbon nanotubes (oMWCNTs) as a function of contact time, pH, ionic strength, temperature, and two kinds of soluble fullerene ( i.e. hydroxylated fullerene (C60(OH)n) and carboxylated[J].Journal of Salt Lake Research,2019,27(3):35-43. |
| |
| Authors: | WANG Jing ZHANG Zhi-hong LIU Peng LI Zhan WU Wang-suo GAO Zhao-yong WANG Hong MA Li WANG Min and PANG Deng-ke |
| |
| Institution: | Qinghai institute of salt lakes, Chinese academy of sciences,Qinghai institute of salt lakes, Chinese academy of sciences,Qinghai university,Qinghai university,Qinghai university,Qinghai institute of salt lakes, Chinese academy of sciences,Qinghai institute of salt lakes, Chinese academy of sciences |
| |
| Abstract: | The adsorption of U(VI) on oxidized multi-walled carbon nanotubes (oMWCNTs) as a function of contact time, pH, ionic strength, temperature, and two kinds of soluble fullerene ( i.e. hydroxylated fullerene (C60(OH)n) and carboxylated fullerene (C60(C(COOH)2)n) were studied under ambient conditions using batch techniques. The results indicated that sorption of U(VI) on oMWCNTs was strongly dependent on pH values and independent of ionic strength. The removal of U(VI) to oMWCNTs was rather quickly and the kinetic sorption can be described by a pseudo second-order model very well. The adsorption isotherms could be described better by the Langmuir model than by the Freundlich model. The thermodynamic data calculated from temperature-dependent adsorption isotherms suggested that the adsorption was spontaneous and enhanced at higher temperature. The drastic effect of C60(OH)n and C60(C(COOH)2)n on the adsorption of U(VI) on oMWCNTs have almost not been found at low concentration, whereas the negative effect was observed at pH>3. The mechanism of C60(OH)n may be contributed to the competitive adsorption sites on oMWCNTs between C60(OH)n and U(VI). The surface charge of oMWCNTs may be changed by C60(C(COOH)2)n. The double site model (DSM) was applied to simulate the adsorption isotherms of U(VI) in the presence of C60(OH)n and fitted the experimental data well. |
| |
| Keywords: | oMWCNTs U(VI) adsorption C60(OH)n C60(C(COOH)2)n |
|
| 点击此处可从《盐湖研究》浏览原始摘要信息 |
| 点击此处可从《盐湖研究》下载免费的PDF全文 |
|
