| HDTMA改性沸石对水中铬酸盐的吸附 |
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| 引用本文： | 陈芳艳,马延文,唐玉斌.HDTMA改性沸石对水中铬酸盐的吸附[J].辽宁石油化工大学学报,2001,21(1):76-79. |
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| 作者姓名： | 陈芳艳 马延文 唐玉斌 |
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| 作者单位： | 1. 抚顺石油学院环境工程研究所,
2. 华东理工大学资 源与环境学院;抚顺石油学院环境工程研究所, |
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| 摘 要： | 采用十六烷基三甲基溴化铵 (HDTMA)对Ca型沸石进行了改性。结果表明 ,最适合的改性温度为 3 0℃ ,改性剂HDTMA溶液质量分数为 1 .5%。又考察了 pH、改性沸石用量及振荡时间对HDTMA -沸石吸附去除水中铬酸盐效果的影响。测定了吸附等温线并探讨了吸附机理。结果表明 ,pH对吸附没有显著影响 ,随着改性沸石用量的增加、振荡时间的延长 ,铬酸盐的去除率升高。改性沸石对水中铬酸根离子的等温吸附曲线呈双“S”型。吸附机理为 :一是通过离子交换而吸附 ;二是通过在沸石表面形成HDTMA -阴离子络合物沉淀而吸附
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| 关 键 词： | HDTMA改性沸石 阳离子表面活性剂 离子交换 吸附机理 |
| 文章编号： | 1005-3883(2001)01-0076-04 |
| 修稿时间： | 2000年2月28日 |
Adsorption of Chromate Onto HDTMA-Modified Zeolite in Water |
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| Chen Fangyan ,Tang Yubin ,Ma Yanwen.Adsorption of Chromate Onto HDTMA-Modified Zeolite in Water[J].Journal of Liaoning University of Petroleum & Chemical Technology,2001,21(1):76-79. |
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| Authors: | Chen Fangyan Tang Yubin Ma Yanwen |
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| Affiliation: | Chen Fangyan 1,Tang Yubin 1,2,Ma Yanwen 1 |
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| Abstract: | The zeolite(Ca-type) was modified by hexadecyltrimethylammonium(HDTMA) .The results show that the optimum modifying temperature is 30 ℃, the optimum H D TMA's concentration is 1.5%.In addition, the effect of pH，HDTMA-zeolite amoun t and shaking time on the adsorption were investigated. The adsorption isotherm and the mechanism for the adsorption were investigated respectively. The results indicate d that pH has no influences on the adsorption, and the adsorption efficiency inc r eases with the extension of shaking time and the addition of HDTMA-zeolite amo u nt. The adsorption isotherm appears in double S shape. The mechanism for the ads orpt ion is: ion exchange and the formation of precipitation of HDTMA-Cr (VI) complex salt perform the adsorption. |
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| Keywords: | HDTMA-modified zeolite Cationic surfactant Ion exchange Mechanism for adsorption |
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