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

作　　者：孙雨佳 吴琼 熊凌燕 李素霞 颜繁颖 朱永春 SUN Yujia;WU Qiong;XIONG Lingyan;LI Suxi;YAN Fanying;ZHU Yongchun(College of Chemistry and Chemical Engineering,Shenyang Normal University,Shenyang,Liaoning 110034,China;Institute of Catalysis for Energy and Environment,Shenyang Normal University,Shenyang,Liaoning 110034,China)

机构地区：[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

出　　处：《中国无机分析化学》2018年第1期1-5,共5页Chinese Journal of Inorganic Analytical Chemistry

基　　金：国家自然科学基金项目(20875063)资助

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的铜离子。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范围内测定铜离子,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40 mL含有铜离子(2.5×10^(-4) mol/L)的KCl(0.025mol/L)溶液中,0.1g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0.004 37s^(-1),5min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63.48mg/g,可以用于自然pH值下污染水中铜离子的吸附去除。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 2.5×10-4~2.5×10-7 mol/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 0.025 mol/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 0.004 37 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.

关 键 词：铜离子 杨树叶 微分脉冲伏安法 电化学还原 

分 类 号：O657.14[理学—分析化学] TH832.4[理学—化学]