孙雨佳,吴 琼,熊凌燕,李素霞,颜繁颖,朱永春.铜离子在废弃杨树叶粉上吸附的研究[J].中国无机分析化学,2018,8(1):1-5.
铜离子在废弃杨树叶粉上吸附的研究
The Adsorption of Copper Ions on Leave Powder of Waste Poplar Leaves
投稿时间:2017-09-02  最后修改时间:2017-11-25
DOI:doi:10.3969/j.issn.2095-1035.2018.01.001
中文关键词:  吸附  铜离子  杨树叶  微分脉冲伏安法  电化学还原
英文关键词:adsorption  Cu ion  poplar leaves powder  differential pulse voltammetry  electrochemical reduction
基金项目:国家自然科学基金项目(20875063)资助
                 
作者单位
孙雨佳 沈阳师范大学化学化工学院,沈阳 110034
吴 琼 沈阳师范大学化学化工学院,沈阳 110034
熊凌燕 沈阳师范大学化学化工学院,沈阳 110034
李素霞 沈阳师范大学化学化工学院,沈阳 110034
颜繁颖 沈阳师范大学化学化工学院,沈阳 110034
朱永春 1 沈阳师范大学化学化工学院,沈阳 110034
2沈阳师范大学能源与环境催化研究所,沈阳110034
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中文摘要:
      以废弃杨树叶粉为原料,用微分脉冲伏安法测定了废弃杨树叶粉吸附水溶液中铜离子。建立了微分脉冲伏安法测定铜离子的方法,在2.5×10-4~2.5×10-7 mol/L范围内检测铜离子,检测限为2.51×0-8 mol/L,并用于铜离子在废弃杨树叶粉上吸附的研究,考察了铜离子浓度范围、吸附时间、温度、杨树叶粉用量对杨树叶粉吸附铜离子的影响。在40mL含有铜离子(2.5×10-4 mol/L)的KCl(0.025 mol/L)溶液中,0.1 g杨树叶粉足以吸附99%的铜离子,0.3g的杨树叶粉吸附达到完全,表观一级吸附速率为0.00437s-1,5 min可近于吸附平衡。吸附不遵从Temkin等温吸附模型,升高温度不利于吸附过程。最大吸附量为63.48 mg/g,可以用于自然pH值下污染水中铜离子的吸附祛除。
英文摘要:
      The adsorption of copper (Cu) ion from aqueous solution with waste poplar leaves powder as an effective bioadsorption material was studied by differential pulse voltammetry (DPV). The limit of detection was found 2.5×10-8 mol/L for Cu ion solution in the concentration range of 2.5×10-4 – 2.5×10-7mol/L in 0.025 mol/L KCl solution. The effects of temperature,adsorption time, and the amount of poplar leaf powder on the adsorption of Cu ion were investigated. In 40 mL of 0.025mol/L KCl solution containing 2.5×10-4 mol/L copper ions, 0.1 g of poplar leaf powder adsorbed nearly 99% of Cu ions while 0.3 g of popular leaf powder completely adsorbed Cu ions. With the apparent first order adsorption rate constant of 0.00437 s-1,equilibrium state was reached in about 5 mins. The adsorption followed Temkin isothermal adsorption model with negative temperature effect. The maximum adsorption capacityis about 63.48 mg/g which may be exploited to remove Cu ions from the pollution water in natural pH condition.for adsorption removal treatments.
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