Comparative Study of Heavy Metal Ion Adsorption Using Raw and Functionalized Carbon Nanotubes Publisher



Ganesh K¹ ; Mubarak NM² ; Karri RR² ; Tanjung FA³ ; Jatoi AS⁴ ; Khalid M⁵ ; Dehghani MH^{6, 7} ; Koduru JR⁸ ; Abusahmin BS²
Source: Water Treatment Using Engineered Carbon Nanotubes Published:2023

Abstract

As the world population has grown, unplanned industrialization, urbanization, agricultural events, and excessive chemical use have significantly increased environmental pollution and introduced toxic contaminants. Impurities, particularly heavy metal ions, enter the system from various sources. Heavy metal ions, for example, are released into the environment by photographic constituents, petrochemical products, fertilizer production, battery manufacturing industries, printing, tannery, leather tanning, metallurgical, and other processes. Adsorption, photocatalysis, coagulation, chemical precipitation, electrochemical method, oxidation, reverse osmosis, solvent extraction, magnetic solid-phase extraction, solid-phase extraction, lime softening, and other technologies have been investigated in recent years for heavy metal removal. A central composite design was demonstrated to optimize the process parameters such as pH, dosage, agitation speed, and contact time. A comparative study of raw and functionalized carbon nanotube (CNT) for the removal of copper from wastewater has been illustrated in this research. The optimum conditions for the removal of copper using raw multiwalled carbon nanotubes and functionalized CNTs are pH of 6, agitation speed of 177 and 176rpm, the CNT dosage of 0.27 and 0.26g, and the contact time is 15 and 21minutes, respectively. © 2024 Elsevier Inc. All rights reserved.