Compost of Aquatic Weed Myriophyllum spicatum as Low-Cost Biosorbent for Selected Heavy Metal Ions

Aquatic weed Myriophyllum spicatum L. is one of the most invasive water plants known. In many countries, it is usually harvested and landfilled, where aerobic and anaerobic decomposition takes place. In this research, the kinetic, equilibrium, and desorption studies of biosorption of Pb(II), Cu(II),...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2014-04, Vol.225 (4), p.1-10, Article 1927
Main Authors: Milojkovic, Jelena V, Stojanovic, Mirjana D, Mihajlovic, Marija L, Lopicic, Zorica R, Petrovic, Marija S, Sostaric, Tatjana D, Ristic, Mirjana D
Format: Article
Language:English
Subjects:
Adsorption
Analysis
Aquatic plants
Aquatic weeds
Aqueous solutions
Atmospheric Protection/Air Quality Control/Air Pollution
Binding sites
Biomass
Biosorption
Cadmium
calcium
Carbonyl compounds
Cations
Climate Change/Climate Change Impacts
Composts
Contamination
copper
Desorption
Earth and Environmental Science
Electron microscopy
Environment
Environmental monitoring
Environmental studies
Equilibrium
Experiments
Fourier analysis
Fourier transform infrared spectroscopy
Fourier transforms
Heavy metals
Hydrogeology
Infrared spectroscopy
Invasive plants
ion exchange
Kinetics
Landfill
Lead
Metal ions
Metals
Myriophyllum spicatum
Nickel
Scanning electron microscopy
soil
Soil Science & Conservation
Sorbents
Spectrum analysis
Water Quality/Water Pollution
zinc
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Summary:Aquatic weed Myriophyllum spicatum L. is one of the most invasive water plants known. In many countries, it is usually harvested and landfilled, where aerobic and anaerobic decomposition takes place. In this research, the kinetic, equilibrium, and desorption studies of biosorption of Pb(II), Cu(II), Cd(II), Ni(II), and Zn(II) ions onto compost of M. spicatum were investigated in batch experiments. Biosorbent was characterized by scaning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). SEM analysis showed that ion exchange between divalent cations Ca(II) and selected metals takes place. The results of FTIR exposed that carbonyl, carboxyl, hydroxyl, and phenyl groups are main binding sites for those heavy metal ions. The rate of adsorption of the five heavy metals was fast, which achieved equilibrium in 40 min, and followed the pseudo-second-order model well. Langmuir, Freundlich, and Sips equilibrium adsorption models were studied, and Sips isotherm gave the best fit for experimental data. Desorption by 0.1 M HNO₃ did not fully recover the metals sorbed onto the compost, indicating that reusing this material as biosorbent is not possible. Furthermore, the use of spent biosorbent as a soil fertilizer is proposed.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-014-1927-8