| 磷酸活化活性炭对Cu~（2＋）的吸附特征研究 |
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| 引用本文： | 陈丽萍,司秀荣,李凌云.磷酸活化活性炭对Cu~（2＋）的吸附特征研究[J].生态环境,2011,20(2):353-358. |
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| 作者姓名： | 陈丽萍 司秀荣 李凌云 |
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| 作者单位： | 内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特,010022 |
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| 基金项目： | 内蒙古自然科学基金资助项目 |
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| 摘 要： | 寻求廉价而高效的吸附材料为目的,研究向日葵秸杆基活性炭对铜离子的吸附性能。以向日葵秸秆为原料,经H3PO4活化制备活性炭,通过静态实验研究了其对水溶液中Cu2＋的吸附特性,考察了溶液pH值、吸附温度和离子强度对吸附的影响,探讨了吸附热力学、动力学和吸附机理。结果表明：溶液pH值为5～6时活性炭对Cu2＋的去除效果最好;向50 mL 170 mg·L-1的溶液中加入0.5 g活性炭,温度为45℃、吸附时间为1 h时,对Cu2＋的去除率可达98.3%;Langmuir方程能更好地描述Cu2＋在活性炭上的等温吸附特征,静态吸附容量可达41.03 mg·g-1;吸附过程符合拟二级动力学过程,且为吸热的化学吸附过程,膜扩散为速率控制步骤,离子交换可能在吸附过程中起了重要作用。
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| 关 键 词： | H3PO4活化 向日葵秸秆 活性炭 铜离子 吸附机理 |
Adsorption characteristics of Cu2+ onto carbon activation with H3PO4 |
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| CHEN Liping,SI Xiurong,LI Lingyun.Adsorption characteristics of Cu2+ onto carbon activation with H3PO4[J].Ecology and Environmnet,2011,20(2):353-358. |
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| Authors: | CHEN Liping SI Xiurong LI Lingyun |
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| Institution: | CHEN Liping,SI Xiurong,LI Lingyun College of Chemistry and Environment Science,Inner Mongolia Normal University,Hohhot 010022,China |
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| Abstract: | For the purpose looking for cheap and high effective adsorption materials,the removal of Cu2+ from aqueous solution by sunflower straw activation carbon had been studied.Cu2+ adsorption characteristics in water solution has been studied in static experiments,with the activation carbon manufactured through activator H3PO4 and sunflower stalks as raw material.The influence of solution pH value,ionic strength and temperature was investigated.The adsorption kinetics,thermodynamic behavior and mechanism were als... |
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| Keywords: | H3PO4 activation sunflower stalks activation carbon Cu2 adsorption mechanism |
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