Abstract
Environmental pollution caused by release of toxic metals (rare earth elements, etc.) into aquatic environment as a result of industrial activity is one of the serious global issues, thus development of different efficient methods for removal of these metals from wastewaters seems to be important subject today. Carbon nanoparticles (CNPs) are well-known to have the superior adsorption efficiency toward heavy metals in aqueous solution. However, little research has been dedicated to exploit their use for the removal of rare earth elements (REEs) from contaminated water. Therefore, the environmental application of CNPs to remove Lanthanum (La III) and Neodymium (Nd III) from wastewater was performed. In this work, Adsorption experiments were carried out by batch mode adsorption to investigate the influence of different conditions that enhanced the adsorption of La(III) and Nd(III) by CNPs such as pH of solution, adsorbent dose, contact time, and initial concentration of investigated rare earth elements. The obtained results showed that the optimum adsorption for the removal both studied metals from contaminated water were 0.02 g/25 ml of CNPs at pH 7.0 after 40 min of adsorption. This work demonstrates that CNPs can be considered as potential adsorbents to target metal ions from wastewater.
Highlights
One of the world’s major environmental problems is the disposal of large volumes of wastewater containingHow to cite this paper: Younis, A.M., Kolesnikov, A.V. and Desyatov, A.V. (2014) Efficient Removal of La(III) and Nd(III) from Aqueous Solutions Using Carbon Nanoparticles
The presence of heavy metal ions in aquatic environment systems had become much more serious and attracted attention with a rapid development of industries and listed as high priority contaminants by the 2007 CERCLA Priority List of Hazardous Substances compiled by the US Environmental Protection Agency (EPA) [ATSDR, 2007], due to their adverse effects on public health and their toxicities in relatively low concentrations in ecological systems [1]-[4]
The application of carbon nanoparticles for the removal of metal ions from wastewater is one of the pioneer studies which have been done in environmental field
Summary
One of the world’s major environmental problems is the disposal of large volumes of wastewater containingHow to cite this paper: Younis, A.M., Kolesnikov, A.V. and Desyatov, A.V. (2014) Efficient Removal of La(III) and Nd(III) from Aqueous Solutions Using Carbon Nanoparticles. The presence of heavy metal ions in aquatic environment systems had become much more serious and attracted attention with a rapid development of industries and listed as high priority contaminants by the 2007 CERCLA Priority List of Hazardous Substances compiled by the US Environmental Protection Agency (EPA) [ATSDR, 2007], due to their adverse effects on public health and their toxicities in relatively low concentrations in ecological systems [1]-[4]. More stringent requirements for the removal of these toxic metals from wastewaters before releasing into the environment are required [5] [6] Their presence in wastewater requires treatment and strict environmental regulations on the discharge of metal ions as well as rising demand for clean water with extremely low level of heavy metal ions make it greatly important to develop different efficient methods of removing metal ions from wastewaters before releasing into the environment [7]. Heavy metal ions removal from water has become an important subject today
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