| 金属离子印迹改性壳聚糖对水中Ni2+的去除研究 |
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| 引用本文： | 唐雪娇,姚燕,马宏卿,沈伯雄.金属离子印迹改性壳聚糖对水中Ni2+的去除研究[J].水处理技术,2011,37(9). |
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| 作者姓名： | 唐雪娇 姚燕 马宏卿 沈伯雄 |
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| 作者单位： | 南开大学环境科学与工程学院,天津,300071 |
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| 基金项目： | 中央高校基本科研业务费专项资金(65010451); 国家自然科学基金(50976050) |
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| 摘 要： | 利用金属Ni2+印迹法,通过交联和胺化反应自制Ni2+印迹改性壳聚糖吸附剂小球(P-C-CTS(Ni)),通过比较中间产品的含水率、吸附容量及FT-IR谱,分析壳聚糖在改性过程中的反应机理,验证吸附剂P-C-CTS( Ni)合成路线的正确性,并证明交联前对壳聚糖分子中的活性氨基进行保护的必要性.低浓度Ni2+(CNi=0.852 mmol·L-1)条件,考察不同酸度下吸附容量的变化和酸度对水中低浓度Ni2+去除率的影响规律.结果表明,酸度对P-C-CTS(Ni)去除重金属Ni2+效率的影响显著,酸度对Ni2+去除率的影响规律与对吸附容量的影响基本一致,并对吸附机理进行深入分析.P-C-CTS(Ni)在经过“吸附-脱附-再生”8次循环,颜色与外观等基本不变,重复使用性能稳定.
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| 关 键 词： | 金属离子印迹 改性壳聚糖 吸附剂 去除率 |
REMOVAL OF Ni~(2+) IN WASTEWATER BY METAL-ION IMPRINTING MODIFIED CHITOSAN |
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| Tang Xuejiao
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Yao Yan
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Ma Hongqing
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Shen Boxiong.REMOVAL OF Ni~(2+) IN WASTEWATER BY METAL-ION IMPRINTING MODIFIED CHITOSAN[J].Technology of Water Treatment,2011,37(9). |
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| Authors: | Tang Xuejiao Yao Yan Ma Hongqing Shen Boxiong |
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| Affiliation: | Tang Xuejiao,Yao Yan,Ma Hongqing,Shen Boxiong(College of Environmental Science & Engineering,Nankai University,Tianjin 300071,China) |
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| Abstract: | P-C-CTS(Ni) was prepared by combination polyamination and cross-linked reactions with metal-ion imprinting technology.The reaction mechanism of modification was analyzed and the synthesis of P-C-CTS(Ni) in desirable processes was validated by comparation of moisture content and the adsorption capacities of Ni2+ and FTIR spetra of semifinished products.It was suggested that protecting the active amide groups of chitosan before cross-linked reaction was very necessary.At low concentration of Ni2+(CNi=0.852 mm... |
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| Keywords: | metal-ion imprinting modified chitosan adsorbent removal rate |
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