Assessment of negative influence of manganese in welding fumes on welder's health and ways to reduce it

Abstract

The article presents the results of a theoretical study (literature review of publications), which allowed to establish the negative impact of welding aerosol (manganese and other elements) on the human body: you can use special welder protection equipment (ventilation and individual welder protection); reduce the quantitative and qualitative content of manganese welding aerosols (welding technology, power sources, modern welding materials); reduce the content of manganese in the human body, removing it with medicines. Experimental studies have shown that the use of an inverter power source, compared with a diode rectifier, contributes: to ensuring the drop-by-drop transfer of electrode metal to reduce the time of their formation by 46% and the transition by 28%; ensures the transition of alloying elements from welding materials to the weld metal by 6% and reduces its losses from the fusion line by 6% and HAZ by 3%; to reduce the intensity of education (g / min) SA and their components by 23%; to reduce the specific allocation of CA and their components by 23%.

Condition Assessment Industrially Contaminated Soils of Kuzbass by Bioindication

“…[1,2] Thus, these pollutants affect the density and structural composition of the soil, and their accumulation leads to an ecological imbalance that adversely affects the environment. [3,4,5] Purpose of the study: to assess the ecological state of soils in the territories exposed to technogenic pollution near the ash dump of the thermal power plant.…”