林产化学与工业2017，Vol.37Issue(3)：141-146,6.DOI:10.3969/j.issn.0253-2417.2017.03.020
NaOH/KOH改性柠檬渣吸附pb2+的动力学和热力学研究
Kinetics and Thermodynamics Studies of the Adsorption of Pb2+ onto NaOH/KOH Modified Lemon Residues
摘要
Abstract
In order to study the adsorption properties of chemically treated lemon residues,the lemon residues were modified by 10％ KOH and 10％ NaOH,respectively.The effects of the initial pH,adsorption time and initial concentration on the adsorption of Pb2+ were investigated,and the adsorption kinetics and thermodynamics were also studied.The samples were characterized by means of UV,XRD and EDS.The results showed that the adsorption equilibrium times of KOH and NaOH modified lemon residue to Pb2+ were 60 and 90 rmin,respectively.The adsorption of Pb2+ onto KOH modified lemon residue fitted to the quasi second order kinetic equation,whereas the adsorption by NaOH modified lemon residue more fitted to quasi first order kinetic equation.The adsorption of Pb2+ on modified lemon residue was in accordance with the Langmuir adsorption model.The maximum UV absorption wavelengths of KOH and NaOH modified lemon residues were 280 and 191 nm respectively.The structures of the lemon residues were amorphous and mainly composed of carbon.And there was Pb element in the absorbed modified lemon residues,but the formation peak of EDS was not high.关键词
柠檬渣/吸附/改性/动力学/热力学Key words
lemon residues/adsorption/modification/kinetics/thermodynamics分类
化学化工引用本文复制引用
沈王庆,雷阳..NaOH/KOH改性柠檬渣吸附pb2+的动力学和热力学研究[J].林产化学与工业,2017,37(3):141-146,6.基金项目
四川省教育厅重点项目(13ZA0002) （13ZA0002）
