Competitive Adsorption of Heavy Metals Copper, Cadmium and Lead by Synthetic Zeolite

DOI

10.2991/icsd-16.2017.37How to use a DOI?

Keywords

Heavy metal, Copper, Cadmium, Lead, Fly ash, zeolite, Competitive adsorption

Abstract

The experiments are to study the competitive adsorption properties of three heavy metals of Cu2+, Cd2+ and Pb2+ ions through synthesizing zeolite. The influencing factors and competitive adsorption kinetic modes are investigated. The results show that, with the increase of adsorbed dose, the removal rate of zeolite on the adsorption of three heavy metals all rise constantly, and the saturated adsorption capacity all drops gradually. When the value of initial concentration are 50 and 100 mg/L, the competitive adsorption sequence of zeolite on three heavy metal ions is: Pb>Cu>Cd. The removal rate of zeolite on the adsorption of three heavy metal ions all increases with the rise of the value of initial pH on the whole. During the competitive adsorption process, at various value of initial pH and concentration, the adsorption sequence of zeolite on three heavy metals remains still: Pb>Cu>Cd. The reaction time has an apparent effect on the removal rate of three heavy metals ions. The removal rate of zeolite increases gradually with the increase of reaction time, and the adsorption removal rate improves quickly within 2 hours. The value of equilibrium adsorption capacity of quasi second-class kinetic equation Qexp is closer to the value of equilibrium adsorption capacity Qcal according to experimental measurement. The adsorption behavior of synthetic zeolite materials on the adsorption of three heavy metal ions all fits for quasi second-class adsorption kinetic equation.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiao Zhang
AU  - Ting Cheng
AU  - Chen Chen
PY  - 2016/12
DA  - 2016/12
TI  - Competitive Adsorption of Heavy Metals Copper, Cadmium and Lead by Synthetic Zeolite
BT  - Proceedings of the 2nd 2016 International Conference on Sustainable Development (ICSD 2016)
PB  - Atlantis Press
SP  - 171
EP  - 177
SN  - 2352-5401
UR  - https://doi.org/10.2991/icsd-16.2017.37
DO  - 10.2991/icsd-16.2017.37
ID  - Zhang2016/12
ER  -