将氧化多壁碳纳米管(OMWCNTs)和海藻酸钠(SA)进行复合,制备氧化多壁碳纳米管/海藻酸钠(OMWCNTs/SA)复合材料,系统研究了各因素对OMWCNTs/SA吸附Pb(Ⅱ)效果的影响。结果表明:OMWCNTs/SA对Pb(Ⅱ)的吸附量随溶液pH和温度的升高而增大,但随溶液中Na+浓度的增大而减小。在240min时,OMWCNTs/SA对Pb(Ⅱ)的吸附达到平衡。吸附过程符合Langmuir等温吸附模型和拟二级动力学模型,且自发吸热。在303.15K时,Langmuir等温吸附模型拟合得到的最大吸附量为402.029mg/g。
Oxidized multi-walled carbon nanotubes/Sodium alginate (OMWCNTs/SA) composites were prepared by compounding the oxidized multi-walled carbon nanotubes (OMWCNTs) and sodium alginate (SA).The influences of various factors on the adsorption of Pb(Ⅱ) by OMWCNTs/SA were systematically studied.The results showed that the adsorption capacity of Pb(Ⅱ) on OMWCNTs/SA increased with the increase of pH and temperature,but decreased with the increase of Na+ concentration.The adsorption of Pb(Ⅱ) on OMWCNTs/SA reached equilibrium at 240min.The adsorption process accorded with Langmuir isothermal adsorption model and pseudo-second-order kinetic model,and was endothermic spontaneously.At 303.15K,the maximum adsorption capacity fitted by Langmuir isothermal adsorption model was 402.029mg/g.
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基金资助
贵阳市科技局贵阳学院专项资金资助[GYU-KY-(2022)];贵州省大学生创新创业训练计划项目(20195200348)
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