Abstract
Heavy metal water pollution is one of the most pressing environmental problems of the last decades. Wastewater from many industrial processes contain high concentrations of metals and have very acid pH. Thus, technologies to remove heavy metals from aqueous solutions are costly or suffer deterioration when in contact with substances with acid pH. Natural zeolites have demonstrated to be a low-cost heavy metal adsorbent. This study aimed to determine basic parameters for efficient copper removal by aluminosilicates. A Zeolite was conditioned with concentrated H 2 SO 4 to further develop the experiments to test 4 kinetics (Pseudo-first-order, Pseudo-second-order, Elovich and Webber-Morris) and to calculate thermodynamic parameters (ΔG°, ΔH°, ΔS° and Ea). Out of the studied kinetic models, the one that best correlated was the Pseudo-second order model. According to thermodynamic studies, the increase in temperature favors adsorption and the process is spontaneous. Keywords: Kinetics, Thermodynamic, Aluminosilicates, Metals, Pseudo-second-order. DOI : 10.7176/JEES/9-3-04 Publication date :March 31 st 2019
Highlights
Heavy metal pollution is one of the most important environmental problems of recent decades (Abdolali et al, 2016)
Acid mine drainages (AMD) are a serious environmental problem faced by mining companies around the world, due to their extremely low pH values and their high content of heavy metals
acid mine drains (AMD) is one of the most important forms of water pollution in the world and the USA Environmental Protection Agency (US-EPA) considers that it is only located after global warming and ozone depletion in terms of ecological risk
Summary
Heavy metal pollution is one of the most important environmental problems of recent decades (Abdolali et al, 2016). Acid mine drainages (AMD) are a serious environmental problem faced by mining companies around the world, due to their extremely low pH values (pH less than 3) and their high content of heavy metals The use of biosorbents to remove heavy metals or to recover valuable metals from an aqueous solution is one of the most recent developments in environmental technologies and bioremediation technologies Malamis and Katsou (2013) affirmed that several factors had an influence on the process of adsorption of heavy metals by means of zeolites. The results will help design innovative technologies for heavy metal removal
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