Journal of Food, Agriculture and Environment

Removal of lead, cadmium and manganese from liquid solution using water lily (Nymphaea alba)

Author(s):

Elahe Javadi ^1*, Faramarz Moattar ¹, Abdol Reza Karbassi ², Seiied Masoud Monavari ¹

Recieved Date: 2010-07-16, Accepted Date: 2010-10-22

Abstract:

This study aims to investigate the potential efficiency of white water lily (Nymphaea alba) to accumulate heavy metals (Pb, Cd and Mn) at four different concentrations (1, 2.5, 5 and 10 mg/l) and 3 pH (5.5, 6.5 and 7.5) as well as the influence of pH and metal concentration in removal process. Using the correlation coefficient and cluster analysis statistical methods, the present study investigated the high capability of plant leaf in accumulation of heavy metals. Maximum accumulation is related to manganese (3.743 mg/g) at concentration 5 mg/L and pH 6.5 and the lowest level is found for cadmium (0.464 mg/g) at concentration 1 mg/L and pH 5.5. Totally, the minimum uptake occurred at the highest pH (7.5) and concentration (10 mg/L). Cadmium and manganese accumulation levels in water lily tissue decreased by increasing in metal concentration. The maximum accumulation of manganese (3.455 mg/g) fitted at concentration of 1 mg/L and pH 7.5. However, the maximum accumulation of cadmium (0.55 mg/g) fitted at concentration of 5 mg/L and pH 6.5. By increasing of lead concentration, uptake level decreased as well, but at concentration of 10 mg/L and pH 5.5 increased dramatically. The residues of mentioned heavy metals in laboratorial solutions had ascending trend by increasing the metal concentrations and decreasing trend by increasing pH. Eventually, the maximum residue of metals is related to cadmium (3.38 mg/L) and the minimum is due to manganese (0.002 mg/L). By considering the results, one can deduce that white water lily can be used as biological filter in order to heavy metal elimination from industrial wastewater. All these are emanated from characteristics of water lily, including resistance against wetlands and lakes environmental conditions, quick growth, simple cultivation and its good adaptation to environment.

Keywords:

White water lily, accumulation, heavy metal, manganese, cadmium, lead, concentration

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Journal: Journal of Food, Agriculture and Environment
Year: 2010
Volume: 8
Issue: 3&4
Category: Environment
Pages: 1220-1225

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