J. Bio. Env. Sci.5(3), 170-176, September 2014
In recent years, agricultural by-products have been widely regarded as metal removal from water. The object of this study is to investigate the possibility of using pistachio soft shell as low-cost effective alternative adsorbent for the removal of lead (II) and mercury (II) ions from aqueous solutions. Batch adsorption experiments were performed as a function of pH, temperature, contact time, initial metal ion concentration and adsorbent dose. Adsorption for both lead (II) and mercury (II) was found to be highly dependent on pH compared to the other parameters investigated. Obtained results gave a removal of 90.9(±2.8) % for lead (II) in the pH of 6, exposure time of 80 min at 25oC. Maximum removal of mercury (II) of 91.5(±2.1) % was obtained in pH 6 at 25oC after exposure time of 100 min.The Langmuir and Freundlich equations for describing sorption equilibrium were applied and the results indicate that the process was well described by Freundlich. Also adsorption kinetics data were modeled using the pseudo-first and pseudo-second order, it was found that the second-order model describes better the uptake of both ions. These results have demonstrated the immense potential of pistachio shell as an alternative adsorbent for toxic metal ions remediation in polluted water.
Canet L, Ilpide M, Seta P. 2002. Efficient facilitated transport of lead, cadmium, zinc and silver across a flat sheet-supported liquid membrane mediated by lasalocid A. Separation science and technology, 37(8), 1851–1860.
Das N, Karthika P, Vimala R, Vinodhini V. 2008. Use of natural products as biosorbent of heavy metals – a review. Natural Product Radiance, 7(2), 133-138.
Ercal N, Gurer-Orhan H, Aykin-Burns N. 2001. Toxic metals and oxidative stress part I: mechanisms involved in metal-induced oxidative damage. Current topics in medicinal chemistry, 1(6), 529-539.
Esalah JO, Weber ME, Vera JH. 2000. Removal of lead, cadmium and zinc from aqueous solutions by precipitation with sodium Di‐(n‐octyl) phosphinate. The Canadian Journal of Chemical Engineering, 78(5), 948-954.
Kazemipour M, Ansari M, Tajrobehkar S, Majdzadeh M, Kermani HR. 2008. Removal of lead, cadmium, zinc, and copper from industrial wastewater by carbon developed from walnut, hazelnut, almond, pistachio shell, and apricot stone. Journal of Hazardous Materials, 150, 322-327.
Lin JH, Wu ZH, Tseng WL. 2010. Extraction of environmental pollutants using magnetic nanomaterials. Analytical Methods, 2, 1874-1879.
Park HJ, Jeong SW, Yang JK, Kim BG, Lee S M. 2007. Removal of heavy metals using waste eggshell. Journal of Environmental Sciences, 19(12), 1436-1441.
Sud D, Mahajan G, Kaur MP. 2008. Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions–A review. Bioresource Technology, 99, 6017-6027.
Tan IAW, Hameed BH, Ahmad AL. 2007. Equilibrium and kinetic studies on basic dye adsorption by oil palm fibre activated carbon. Chemical Engineering Journal, 127(1-3), 111-119.
Toles CA, Marshall WE. 2002. Copper ion removal by almond shell carbons and commercial carbons: batch and column studies. Separation science and technology, 37(10), 2369-2383.
Turan NG, Mesci B. 2011. Use of Pistachio Shells as an Adsorbent for the Removal of Zinc (II) Ion. CLEAN–Soil, Air, Water, 39(5), 475-481.
Volesky B, Holan ZR. 1995. Biosorption of heavy metals. Biotechnology progress, 11(3), 235-250.
Wu CH. 2007. Adsorption of reactive dye onto carbon nanotubes: equilibrium, kinetics and thermodynamics. Journal of hazardous materials, 144(1-2), 93-100.
Zouboulis AI, Matis KA, Lanara G, Loos-Neskovic C. 1997. Removal of cadmium from dilute solutions by hydroxyapatite, Part II, Flotation studies. Separation science and Technology, 32(10), 1755-1767.