Open AccessA 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
Author(s) -
Danial Soleymani-ghoozhdi,
Rouhollah Parvari,
Yunes Jahani,
Morteza Mehdipour-Raboury,
Ali Faghihi Zarandi
Publication year - 2022
Publication title -
analytical methods of environmental chemistry journal
Language(s) - English
Resource type - Journals
eISSN - 2645-5552
pISSN - 2645-5382
DOI - 10.24200/amecj.v5.i01.163
Subject(s) - mercury (programming language) , carbon nanotube , adsorption , materials science , sorbent , cold vapour atomic fluorescence spectroscopy , nanoparticle , chemical engineering , environmental chemistry , chemistry , nanotechnology , detection limit , chromatography , organic chemistry , engineering , computer science , programming language
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.