Adsorption Heavy Metal from Contaminated Water , by Modified Shell of  Wild Endemic Almonds:  Amygdalus Lycioides and Amygdalus  Wendelboi

Parisa Ziarati^1*, Armaghan Kermanshah²  and Maryam Moslehishad³

¹Depatment of Medicinal Chemistry, Pharmacy Faculty,  Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran ²Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran ³Young Researchers Club, Pharmaceutical Sciences Branch, Islamic Azad University (IAUPS), Tehran, Iran

DOI : http://dx.doi.org/10.13005/bbra/1923

ABSTRACT: 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 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 plasma-atomic 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.

KEYWORDS: Wild Almond; contaminated water; Adsorbent; Removal of Heavy Metals

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