摘要
A niobate/titanat nanoflakes(Nb/TiNFs)composite was synthesized via the hydrothermal method and used to remove Pb(Ⅱ)from water.XRD,TEM,and SEM results indicate that Nb/TiNFs appear as nanoflakes,of which the primary crystal phase is tri-titanate.Nb/TiNFs show rapid adsorption kinetics and the result fits well with the pseudo-second order model.The key mechanism of adsorption is ion-exchange between metal and-ONa/H.According to the Langmuir isotherm model,the maximum capacity of Pb(Ⅱ)is 488.323 mg·g^-1.The relatively low RL values indicate that Nb/TiNFs exhibit favorable adsorption of Pb(Ⅱ).Nb/TiNFs indicate high adsorption capacity over a broad pH range.Co-existing inorganic ions(Na+and Ca^2+)have a slight inhibition effect on adsorption,and HA moderately inhibits the adsorption of Pb(Ⅱ)on Nb/TiNFs.Because of the simple method of synthesis and high removal efficiency for heavy metals,Nb/TiNFs are a promising material in remediation of heavy metal polluted water.
作者
DING Qingwei
SUI Rui
LIU Xiaona
QIAN Tianwei
丁庆伟;隋睿;LIU Xiaona;钱天伟(College of Environment and Safety,Taiyuan University of Science and Technology,Taiyuan 030024,China;College of EnvironmentalScience and Engineering,Taiyuan University of Technology,Jinzhong 030600,China)
基金
Funded by the National Natural Science Foundation of China(41272375)
the Key Research and Development Plan of Shanxi Province(No.201903D121085)。
