Application of the Quartz Crystal Microbalance Method for Measuring Mercury in the Air of Working Environments Involved to Artisanal and Small-scale Gold Mining (ASGM).

Autor: Marumoto K; Environmental Chemistry Section, National Institute for Minamata Disease (NIMD), 4058-18 Hama, Minamata, Kumamoto, 867-0008, Japan. marumoto@nimd.go.jp., Noda K; Environmental Measurement Research Institute, Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan., P G Pereira J; Environmental Section, Institute Evandro Chagas (IEC), Rodovia BR-316 km 7 s/n-Levilandia-67030-000, Ananindeua, Para, Brazil., De Oliveira Lima M; Environmental Section, Institute Evandro Chagas (IEC), Rodovia BR-316 km 7 s/n-Levilandia-67030-000, Ananindeua, Para, Brazil., De Jesus IM; Environmental Section, Institute Evandro Chagas (IEC), Rodovia BR-316 km 7 s/n-Levilandia-67030-000, Ananindeua, Para, Brazil., Marumoto M; Toxicologic Pathology Section, National Institute for Minamata Disease (NIMD), 4058-18, Hama, Minamata, Kumamoto, 867-0008, Japan., Akagi H; International Mercury Laboratory (IML), 426-2 Fukuro, Minamata, Kumamoto, 867-0034, Japan.
Jazyk: angličtina
Zdroj: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry [Anal Sci] 2020 Dec 10; Vol. 36 (12), pp. 1515-1519. Date of Electronic Publication: 2020 Aug 21.
DOI: 10.2116/analsci.20P178
Abstrakt: Artisanal small gold mining (ASGM) is responsible for approximately 40% of the total Hg emissions into the atmosphere worldwide. In developing countries, many people are engaged in ASGM activities. We developed a small, simple Hg measuring device, which detects Hg in the air based on the change of the oscillation frequency of an Au electrode on a quartz crystal microbalance (QCM). This device is called QCM-Hg. We tested the viability of the QCM-Hg in various work settings including a gold mining area and gold shops. In working environments with an airborne Hg concentration of several μg m -3 , the changing rate of the oscillation frequency for either 2 or 3 min corresponded with the Hg concentrations measured using the conventional method of gold amalgamation and cold vapor atomic absorption spectrometer (CVAAS). The results revealed that the QCM-Hg is a useful device for real-time Hg monitoring in actual working environments related to ASGM activities and Hg treatment facilities.
Databáze: MEDLINE
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