| 胶团强化超滤去除水溶液中Cd2+,Cu2+和Ni2+的研究 |
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| 引用本文： | 方瑶瑶,曾光明,黄瑾辉,曲云欢,李雪,牛菁. 胶团强化超滤去除水溶液中Cd2+,Cu2+和Ni2+的研究[J]. 中南大学学报(自然科学版), 2011, 42(1) |
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| 作者姓名： | 方瑶瑶 曾光明 黄瑾辉 曲云欢 李雪 牛菁 |
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| 作者单位： | 湖南大学,环境科学与工程学院,湖南,长沙,410082 |
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| 基金项目： | 国家自然科学基金资助项目(50608028); 长江学者和创新团队发展计划项目(IRT0719) |
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| 摘 要： | 采用阴离子表面活性剂十二烷基硫酸钠研究胶团强化超滤法对水溶液中3种重金属离子Cd2+,Cu2+和Ni2+的去除,考察不同阴离子的钠盐对胶团强化超滤性能的影响,通过动态光散射法测定溶液中表面活性剂胶团的直径。研究结果表明:胶团直径随着SDS浓度的增加逐渐减小,NaCl浓度增加屏蔽了表面活性剂头基之间的静电排斥力,导致胶团聚集数和直径增大;当表面活性剂和金属离子浓度比为10时,在单一和混合体系中,同一条件下的Cd2+,Cu2+和Ni2+截留率都基本相同,均高于98%,证明胶团强化超滤去除金属离子的机理是金属离子通过静电引力吸附于SDS胶团上,金属离子的截留率只与其价态有关,而与金属离子种类无关;高浓度NaCl的加入会使Cd2+截留率显著降低。
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| 关 键 词： | 膜 胶团强化超滤 表面活性剂 动态光散射 重金属 |
Removal of Cd2+,Cu2+ and Ni2+ in aqueous solution via micellar enhanced ultrafiltration |
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| FANG Yao-yao,ZENG Guang-ming,HUANG Jin-hui,Qu Yun-huan,LI Xue,NIU Jing. Removal of Cd2+,Cu2+ and Ni2+ in aqueous solution via micellar enhanced ultrafiltration[J]. Journal of Central South University:Science and Technology, 2011, 42(1) |
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| Authors: | FANG Yao-yao ZENG Guang-ming HUANG Jin-hui Qu Yun-huan LI Xue NIU Jing |
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| Affiliation: | FANG Yao-yao,ZENG Guang-ming,HUANG Jin-hui,QU Yun-huan,LI Xue,NIU Jing (College of Environmental Science and Engineering,Hunan University,Changsha 410082,China) |
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| Abstract: | The removal of Cd2+,Cu2+ and Ni2+ from aqueous solution via micellar-enhanced ultrafiltration and the effect of salts on metal removal were studied with anionic surfactant sodium dodecyl sulfate.The micelle sizes were determined by dynamic light scattering measurements.The results show that the micelle sizes and aggregation numbers of micelle decrease with the increase of surfactant concentration but increase with the increase of NaCl concentration.When the concentration of surfactant to metal ions in singl... |
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| Keywords: | membrane micellar enhanced ultrafiltration surfactant dynamic light scattering heavy metal |
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