Separation and determination of mercury from nail and hair in petrochemical workers based on silver carbon nanotubes by microwave-assisted headspace sorbent trap

Autor:	Daniel Soleymani, Ali Faghihi-Zarandi, Sahar Zargari
Rok vydání:	2020
Předmět:	Sorbent Materials science chemistry.chemical_element General Medicine Carbon nanotube Silver nanoparticle law.invention Mercury (element) Petrochemical chemistry law Reagent Microwave digestion Cold vapour atomic fluorescence spectroscopy Nuclear chemistry
Zdroj:	Analytical Methods in Environmental Chemistry Journal. 3:21-33
ISSN:	2645-5382 2645-5552
Popis:	In this work, a robust method was developed for the determination of mercury in nail and hair in petrochemical workers. By experimental procedure, 100 mg of hair and nail of workers was prepared as a powder which dried in the oven for 20 min at 95oC. 20 mg of hair or nail samples added to reagents (HNO3/H2O2; 5:1) in polyethylene tube (PET) of microwave digestion and the mercury in resulting solution was removed with silver nanoparticles pasted on multi-walled carbon nanotubes (Ag-MWCNTs) which were placed in head space of separator. The mercury vapor was removed by Ag-MWCNTs as the headspace sorbent trap (HSST) under hood conditions. Finally, the mercury was online determined by cold vapor atomic absorption spectrometry after the heat process at 250oC in the presence of Ar gas. The capacity adsorptions of Ag-MWCNTs and MWCNTs for mercury removal were obtained 205.4 mg g-1 and 63.7 mg g-1, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b44876cb93d5e29212ba52db2ad48a3f https://doi.org/10.24200/amecj.v3.i02.99 Zobrazit plný text záznamu