| 谷氨酸—木质素吸附剂的制备及对Pb~(2+)的吸附性能 |
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| 引用本文： | 马英梅,方桂珍,张锐,李宏振,马艳丽. 谷氨酸—木质素吸附剂的制备及对Pb~(2+)的吸附性能[J]. 东北林业大学学报, 2009, 37(10) |
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| 作者姓名： | 马英梅 方桂珍 张锐 李宏振 马艳丽 |
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| 作者单位： | 生物质材料科学与技术教育部重点实验室(东北林业大学),哈尔滨,150040 |
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| 基金项目： | 黑龙江省"十一五"科技支撑项目 |
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| 摘 要： | 以碱木质素、谷氨酸钠及甲醛为原料,依据Mannich反应制备谷氨酸-木质素吸附剂(GA-L).采用FT-IR和凯氏定氮表征其化学结构,并分析了吸附时间、吸附剂用量、pH值及反应温度对Pb2+吸附性能的影响.研究结果表明,谷氨酸已接枝到木质素上,产物氮质量分数为2.62%;GA-L在3h达到饱和状态,最佳吸附剂用量为0.2g/L;对酸性介质中的Pb2+具有良好的吸附性能,吸附容量随初始重金属离子质量浓度和温度的增加而增大;引入的胺基和羧基明显提高了木质素的络合能力,GA-L对Pb2+的吸附容量可达87.28mg/g,与未改性木质素(35.07mg/g)相比提高了148.87%.25℃时初始Pb2+质量浓度在20～200mg/L范围内,吸附规律符合Langmuir平衡模型,吸附机理以单分子层化学吸附为主.
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| 关 键 词： | 碱木质素 谷氨酸 Mannich反应 吸附 |
Synthesis of Glutamic Acid-Lignin Adsorbent and Its Adsorptivity to Pb~(2+) |
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| Ma Yingmei,Fang Guizhen,Zhang Rui,Li Hongzhen,Ma Yanli,Harbin ,P. R. China). Synthesis of Glutamic Acid-Lignin Adsorbent and Its Adsorptivity to Pb~(2+)[J]. Journal of Northeast Forestry University, 2009, 37(10) |
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| Authors: | Ma Yingmei Fang Guizhen Zhang Rui Li Hongzhen Ma Yanli Harbin P. R. China) |
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| Affiliation: | Ma Yingmei,Fang Guizhen,Zhang Rui,Li Hongzhen,Ma Yanli(Key Laboratory of Bio-based Material Science , Technology,Ministry of Education (Northeast Forestry University),Harbin 150040,P. R. China) |
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| Abstract: | Glutamic acid-lignin adsorbent (GA-L) was synthesized from alkali lignin modified with sodium glutamate and formaldehyde via Mannich reaction. Chemical changes were analyzed using FT-IR and Kjeldahl,and the effects of adsorption time,usage,pH value,and temperature on the adsorption properties of GA-L to Pb2+ were investigated. Results indicated that glutamic acid had been grafted into lignin,and the nitrogen content of the resulting product was 2.62 percent. GA-L reached saturation within 3 hours,and the op... |
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| Keywords: | Pb2+ |
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