向日葵秸杆对铜离子的吸附特征研究 |
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引用本文: | 陈丽萍,段毅文,陈艺红. 向日葵秸杆对铜离子的吸附特征研究[J]. 安徽农业科学, 2011, 39(3): 1607-1609,1611 |
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作者姓名: | 陈丽萍 段毅文 陈艺红 |
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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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摘 要: | [目的]以寻求廉价而高效的生物吸附材料为目的,研究向日葵秸杆对铜离子的吸附性能。[方法]以向日葵秸杆为主要原料,对含Cu2+的模拟废水进行了吸附试验。[结果]吸附作用受pH值影响明显,在pH值为6.00时,吸附量最大;向日葵秸杆吸附量随温度的升高而增大,Freundlich方程更适合描述Cu2+在向日葵秸杆上的吸附行为;对吸附热力学参数ΔG、ΔS、ΔH的计算表明,吸附反应具有自发性、吸热特性。[结论]向日葵秸杆是一种优良的处理铜离子废水的生物材料。
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关 键 词: | 向日葵秸杆 铜离子 吸附 热力学 |
The Characteristics of Cu2+ Adsorbed by Sunflower Straw |
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Affiliation: | CHEN Li-ping et al(College of Chemistry and Environment Science,Inner Mongolia Normal University,Hohhot,Inner Mongelia 010022) |
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Abstract: | [Objective]For the purpose of looking for cheap and high effective bioadsorption materials,the removal of Cu2+ from aqueous solution by sunflower straw were studied.[Method]The Cu2+ in simulation wastewater were absorbed by the sunflower straw as raw materials.[Results]The results showed that adsorption of Cu2+on to sunflower straw affected remarkably by the pH value,and the maximum adsorption amount was achieved at an optimum pH of 6.00;the equilibrium adsorption amount increase with the increasing of temperature,and the adsorption behavior might be depicted frimly by Freundlich function;the calculated result of thermodynamic parameters,such as ΔG,ΔS and ΔH,showed that the overall adsorption process was endothermic and spontaneous.[Conclusion]The sunflower straw was a kind of good bioadsorption material to deal with the heavy metal ions sewage. |
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Keywords: | Sunflower straw Cu2+ Adsorption Thermodynamics |
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