Adsorption Heavy Metal from Contaminated Water by Modified Shell of Wild Endemic Almonds: Amygdalus lycioides and Amygdalus wendelboi
Biosciences Biotechnology Research Asia
Heavy Metals in Water resources is one of the most important environmental problems of countries. Up to now various methods of removing of these metals is considered, which is including using of low prices materials. In this study the potential of two wild endemic almond: Amygdalus lycioides and Amygdalus wendelboi shells was assessed for adsorption of heavy metal ions such as Ni 2+ , Cr 6+ and Cr 3+ from aqueous solution. A. lycioides and A. wendelboi fruits were collected in June 2013 from
... n June 2013 from Sirmand Mountains near Hadji-Abad County, Hormozgan Province and the mountains in Gnow protected area, Bandar-Abbas, Hormozgan Province in Iran respectively. The analyzing for Ni and Cr (III) and Cr (VI) concentrations using inductively coupled plasmaatomic emission spectrometry (ICP-AES). Adsorption capacity of Cr( VI), Cr(III) and Ni onto modified almond shells by Phosphoric acid was investigated in a batch system by considering the effects of various parameters like contact time, initial concentrations, pH , temperature, absorbent dose and particle size. The adsorption was pH solution dependent and the maximum adsorption was observed at solution pH of 3.2. The amounts of Cr(VI) adsorbed increased significantly with increase in dose of A. wendelboi adsorbent (p<0.02) and their contact time (p<0.05). The results of this study revealed that A. lycioides and A. wendelboi can accumulate high level of Chrome (VI) and (III) in a short time and their uptake rate by plant is significantly affected by their concentrations in the contaminated water (p<0.005). A contact time of 48 by both almond shells was found to be optimum and 83.6% Cr(VI), 90.2% Cr(III)and 94.1% Ni was removed. Experimental results show low cost biosorbent was effective for the removal of pollutants from aqueous solution.