| 重金属离子在改性蛭石表面的竞争吸附及其动力学研究 |
| |
| 引用本文： | 朱小燕,姜丽娜,尚建疆,刘祥.重金属离子在改性蛭石表面的竞争吸附及其动力学研究[J].矿产保护与利用,2018,0(2):111-117. |
| |
| 作者姓名： | 朱小燕 姜丽娜 尚建疆 刘祥 |
| |
| 作者单位： | 伊犁职业技术学院 化工系，新疆 伊宁 835000 |
| |
| 基金项目： | 新疆维吾尔自治区高校青年教师科研培育基金（自然科学类）XJEDU2016S091 |
| |
| 摘 要： | 分别利用蛭石原矿和改性蛭石为吸附剂，对水溶液中的Cu2+、Zn2+、Cd2+进行等温吸附试验，研究了吸附剂用量、溶液pH值、重金属离子浓度、吸附时间、吸附温度等环境因素对单一离子在蛭石表面吸附性能的影响，分析了蛭石吸附三种金属离子动力学机理。试验结果表明，蛭石原矿经900℃的高温膨胀及2%的CTMAB改性后，其吸附容量较蛭石原矿有明显增加。当吸附剂用量为0.3 g、pH值为5~6、金属离子初始浓度为150 mg/L、吸附时间60 min、吸附温度为室温时，改性蛭石对Cu2+、Zn2+、Cd2+三种金属离子的最大吸附率均可达90%以上。
|
| 关 键 词： | 蛭石 重金属离子 竞争吸附 吸附动力学 |
| 收稿时间： | 2018-01-11 |
Study on Competitive Adsorption and Kinetics of Heavy Metal Ions on Modified Vermiculite |
| |
| Affiliation: | Department of Chemical Engineering, Yili Vocational and Technical College, Yining 835000, China |
| |
| Abstract: | By vermiculite ore and modified vermiculite as adsorbent, separately, isothermal adsorption experiment on ions, such as Cu2+, Cd2+, Zn2+ was studied. Various factors, affecting the vermiculite surface adsorption performance of single ion, was studied, including adsorbent dosage, solution pH value, the concentration of heavy metal ions, adsorption time and temperature. And then the adsorption kinetics mechanism of three kinds of metal ions on vermiculite was also studied. The experimental results show that the vermiculite ore expanded in the high temperature of 900℃ and modified by 2% CTMAB, the adsorption capacity increased obviously. When the adsorbent dosage is 0.3 g, pH value 5-6, initial metal ion concentration is 150 mg/L, and adsorption time 60 min, the maximum adsorption rate of three kinds of metal ion can up to 90% at room temperature. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《矿产保护与利用》浏览原始摘要信息 |
|
点击此处可从《矿产保护与利用》下载全文 |
|
