Journal ArticleDOI
Removal of hexavalent chromium ions using CuO nanoparticles for water purification applications
Vinod Kumar Gupta,Vinod Kumar Gupta,Ramesh Chandra,Inderjeet Tyagi,Monu Verma +4 more
- Vol. 478, pp 54-62
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TLDR
Copper(II) oxide nanoparticles were synthesized at low temperature using cold finger assisted magnetron sputtering technique and were applied as adsorbent for the rapid removal of noxious Cr(VI) ions from the solvent phase and were in good agreement with the pseudo second order kinetic behaviour.Abstract:
Copper(II) oxide nanoparticles were synthesized at low temperature using cold finger assisted magnetron sputtering technique and were applied as adsorbent for the rapid removal of noxious Cr(VI) ions from the solvent phase. The average size of CuO nanoparticles from TEM analysis was found to be 8 nm in addition to this the BET surface area (84.327 m2/g) was found to be significantly high in comparison to the previously CuO nanoparticles synthesized via green route. The synthesized CuO nanoparticles is crystalline in nature and exhibits monoclinic phase, which was confirmed using various analytical techniques such as SAED, XRD and Raman analysis. The impact of influential parameters including pH, adsorbent dose, contact time, stirring speed, initial Cr(VI) ions concentration, and temperature were optimized using batch adsorption method in order to obtain maximum removal of Cr(VI) ions. From the thermodynamic parameters, the positive value of enthalpy (ΔH) and negative value of Gibbs free energy (ΔG) indicate the endothermic and spontaneous nature of Cr(VI) ions adsorption, respectively. The adsorption kinetics data was well fitted and found to be in good agreement with the pseudo second order kinetic behaviour.read more
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Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review
TL;DR: In this paper, the authors present a holistic analysis of the synthesis and efficacy of nanosorbents towards the waste water purification by the removal of selected heavy metal ions, with special emphasis on the effect of functionalization of nanoadsorbents on certain key properties such as surface area, separation and adsorption capacity.
Journal ArticleDOI
Impact of heavy metals on the environment and human health: Novel therapeutic insights to counter the toxicity
Saikat Mitra,Arka Chakraborty,Abu Montakim Tareq,Talha Bin Emran,Firzan Nainu,Ameer Khusro,A.M. Idris,Mayeen Uddin Khandaker,Hamid Osman,Fahad A. Alhumaydhi,Jesus Simal-Gandara +10 more
TL;DR: In this article , a review aimed to explore the environmental consequences of the heavy metals, toxicity to the human health, as well as novel therapeutics development from the natural resources, and highlight the nanotechnological and nanomedicinal applications to treat heavy metal toxicity.
Journal ArticleDOI
Nanomaterials as versatile adsorbents for heavy metal ions in water: a review
TL;DR: An attempt has been made to focus on the applicability of different types of nanomaterials, such as clay-nanocomposites, metal oxide-based nanommaterials, carbon nanotubes, and various polymeric nanocomposite as adsorbents for removal of variety of heavy metals from water as reported during the last few years.
Journal ArticleDOI
Effect of hexavalent chromium on the environment and removal techniques: A review
Kingsley Eghonghon Ukhurebor,Uyiosa Osagie Aigbe,Robert Birundu Onyancha,Wilson Nwankwo,Otolorin Adelaja Osibote,Hugues Kamdem Paumo,Onoyivwe Monday Ama,Charles Oluwaseun Adetunji,Israel Uzuazor Siloko +8 more
TL;DR: A comprehensive review of the effects and remediation of chromium from soil and wastewater drawn from several evidence and meta-data-based articles and other publications is presented in this article.
Journal ArticleDOI
Chromium removal from contaminated waters using nanomaterials – A review
Joana C. Almeida,Celso E.D. Cardoso,Daniela S. Tavares,Rosa Freitas,Tito Trindade,Carlos Vale,Eduarda Pereira +6 more
TL;DR: In this paper, the authors reviewed the results of research undertaken in the last decade on the application of various nanomaterials to decrease chromium concentrations in contaminated waters and examined major factors influencing the removal efficiency.
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Journal ArticleDOI
Heavy metal removal from water/wastewater by nanosized metal oxides: a review.
TL;DR: The present review mainly focuses on NMOs' preparation, their physicochemical properties, adsorption characteristics and mechanism, as well as their application in heavy metal removal.