Affiliations: Key Lab of System Ecology, Research Center of
Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085,
China | Research Center of Lake Eco-environment, Chinese
Research Academy of Environmental Sciences, Beijing 100012, China | College of Environment and Resources, Jilin
University, Changchun 130023, China
Abstract: The potential use of Myriophyllum spicatum L. biomass as a
biosorbent for the removal of copper(II) from aqueous solution was
investigated in laboratory condition. The sorption experiments were undertaken
to obtain copper(II) biosorption properties of M. spicatum L., i.e.
equilibrium time, the maximum capacity, and rate constants.
Copper(II) biosorption was fast and equilibrium was attaine1 within
35 min at initial copper(II) concentration of 6 mg/L. Different
isotherm models including the Langmuir, Freundlich, Temkin and Redlich-Peterson
model, were used to investigate the sorption capacity and isotherm. These
models showed an excellent match with the experimental data except for the
Freundlich model. According to the Langmuir coefficients, the maximum sorption
capacity of copper onto M. spicatum L. was 10.80 mg/g. The kinetics of
copper(II) sorption was also analysed and rate constants were
derived. It was found that the overall sorption process was best described by
the pseudo second-order equation, and that intraparticle diffusion was not the
rate determining step. The results of this study showed that M. spicatum L. can
be considered as useful vehicles for the removal and recovery of
copper(II) from aqueous solutions.