Abstract
In order to grasp the actual state of working environment, the variation of pollutant concentration in the area of laboratory waste treatment plant was investigated.
Mercury vapour concentrations captured by a gold-amalgam method from indoor and outdoor of laboratorywaste treatment plant were determined with a flameless atomic absorption spectrophotometer.
This plant was established in 1980 and actually, mercury containing wastewater started to treat since 1982. When various kinds of wastewater with no mercury were treated before 1982, mercuryvapour concentrations were 0.006-0.092μg/m3 in the air at this plant, and the average concentration was 0.029μg/m3.
On the other hand, while mercury containing wastewater were treated after 1982, mercury vapour concentrations in the air at this plant were -0.3 μg/m3 and the average concentration was approximately 10 times as much as prior average of mercury vapour concentration.
As mercury vapour concentrations in the area of this plant have a tendency to rise every year, so that the air in this plant have to be kept clean and mercury containing wastewater have to be stored up tightly.
