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Heavy metal adsorption characteristics of a submerged aquatic plant (Myriophyllum spicatum)

Authors
Journal
Process Biochemistry
1359-5113
Publisher
Elsevier
Publication Date
Volume
39
Issue
2
Identifiers
DOI: 10.1016/s0032-9592(03)00045-1
Keywords
  • Aquatic Plants
  • Biosorption
  • Heavy Metals
  • Langmuir Model
  • Pseudo Second Order

Abstract

Abstract Submerged aquatic plants can be used for the removal of heavy metals. In this paper, the adsorption properties of Myriophyllum spicatum (Eurasian watermilfoil) for lead, zinc, and copper were investigated and the results were compared with other aquatic submerged plants. Data obtained from the initial batch adsorption studies have indicated that M. spicatum is capable of removing lead, zinc, and copper from solution. Metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies fitted the Langmuir model. The maximum adsorption capacities ( q max) were 10.37 mg/g for Cu(II), 15.59 mg/g for Zn(II) and 46.49 mg/g for Pb(II). The kinetics of adsorption of zinc, lead and copper were also analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by the pseudo second order kinetics. The results showed that this submerged aquatic plant M. spicatum can be successfully used for heavy metal removal.

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