Lead removal from aqueous solutions by natural Greek bentonites

被引：22

作者：

Bourliva, A. ^{[1
]}

Michailidis, K. ^{[1
]}

Sikalidis, C. ^{[2
]}

Filippidis, A. ^{[1
]}

Betsiou, M. ^{[2
]}

机构：

[1] Aristotle Univ Thessaloniki, Sch Geol, Dept Mineral Petrol Econ Geol, Thessaloniki 54124, Greece

[2] Aristotle Univ Thessaloniki, Dept Chem Engn, Sch Engn, Thessaloniki 54124, Greece

来源：

CLAY MINERALS | 2013年 / 48卷 / 05期

关键词：

bentonite; montmorillonite; adsorption; heavy metals; kinetics; process design; Milos; Greece;

D O I：

10.1180/claymin.2013.048.5.09

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Three bentonite samples (B1, B2, B3) from Milos Island, Greece, were investigated by XRD, AAS, DTA-TG, FTIR and specific surface area measurement techniques. A laboratory batch study has been performed to investigate the adsorption characteristics of lead ions (Pb2+) onto natural bentonite samples. The effect of various physicochemical factors that influence adsorption, such as solution pH (2-6), adsorbent dosage (1-10 g L-1), contact time (20-360 min), and initial metal ion concentration (5-150 mg L-1) was studied. A number of available models like the Lagergren pseudo first-order kinetic model, the pseudo second-order kinetic model and intra-particle diffusion were utilized to evaluate the adsorption kinetics. The adsorption of Pb2+ was modelled with the Langmuir, Freundlich and D-R isotherms. The maximum Pb2+ adsorption capacities for B1, B2 and B3 were 85.47 mg g(-1), 73.42 mg g(-1) and 48.66 mg g(-1), respectively.

引用

页码：771 / 787

页数：17

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