Analytical Methods in Environmental Chemistry Journal
AMECJ

A new analytical method based on Co-Mo nanoparticles supported by carbon nanotubes for removal of mercury vapor from the air by the amalgamation of solid-phase air removal

Document Type : Original Article

Authors

Danial soleymani-ghoozhdi 1
Rouhollah Parvari 1
Yunes Jahani 2
Morteza Mehdipour-Raboury 1
Ali Faghihi-Zarandi 1

1 Department of Occupational Health and Safety at Work, Kerman University of Medical Sciences, Kerman, Iran

2 Department of Biostatistics and Epidemiology, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran.

https://doi.org/10.24200/amecj.v5.i01.163
Abstract
Heavy metals are a major cause of environmental pollution, and mercury is a well-known toxicant that is extremely harmful to the environment and human health. In this study, new carbon nanotubes coated with cobalt and molybdenum nanoparticles (Co-Mo/MWCNT) were used for Hg0 removal from the air by the amalgamation of solid-phase air removal method (ASPAR). In the bench-scale setup, the mercury vapor in air composition was produced by the mercury vapor generation system (HgGS) and restored in a polyethylene airbag . In optimized conditions, the mercury vapor in the airbag passed through Co-Mo/MWCNT and was absorbed on it. Then, the mercury was completely desorbed from Co-Mo/MWCNT by increasing temperature up to 220 °C and online determined by cold vapor atomic absorption spectrometry (CV-AAS). The recovery and capacity of Co-Mo/MWCNT were obtained at 98% and 191.3 mg g-1, respectively. The Repeatability of the method was 32 times. The mercury vapors absorbed on Co-Mo/MWCNT adsorbent could be maintained at 7 days at the refrigerator temperature. The Co-Mo/MWCNT as a sorbent has many advantages such as; high capacity, renewable, good repeatability and chemical adsorption (amalgamation) of mercury removal from the air. The method was successfully validated by MCA and spiking of real samples.

Graphical Abstract

A new analytical method based on Co-Mo nanoparticles supported by carbon nanotubes for removal of mercury vapor from the air by the amalgamation of solid-phase air removal

Keywords

Mercury removal
Air
Adsorption
Cobalt and molybdenum nanoparticles
Multiwalled Carbon nanotube
Amalgamation solid-phase air removal
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Analytical Methods in Environmental Chemistry Journal
Volume 5, Issue 1
Winter 2022
Pages 22-35