Autor(es): Marumoto, Kohji ; Noda, Kazutoshi ; Pereira, Jo?o Guilherme Duarte ; Lima, Marcelo de Oliveira ; Jesus, Iracina Maura de ; Marumoto, Masumi ; Akagi, Hirokatsu
Data: 2021
Origem: Oasisbr
Assunto(s): Merc?rio / an?lise; Merc?rio / toxicidade; Polui??o do Ar / an?lise; An?lise do Ar; Minera??o; Ouro; T?cnicas de Microbalan?a de Cristal de Quartzo / m?todos; Ambiente de Trabalho / an?lise
Environment Research and Technology Development Fund (JPMEERF20175004) of the Environmental Restoration and Conservation Agency in Japan
National Institute for Minamata Disease. Environmental Chemistry Section. Japan
Advanced Industrial Science and Technology. Environmental Measurement Research Institute Japan.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil.
Minist?rio da Sa?de. Secretaria de Vigil?ncia em Sa?de. Instituto Evandro Chagas. Ananindeua, PA, Brasil.
National Institute for Minamata Disease. Toxicologic Pathology Section. Japan.
International Mercury Laboratory. Japan
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 ?g 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.
