The study focused on assessing the risks of exposure to welding fumes and airborne heavy metals in electronic manufacturing workshops in Hangzhou, China.
Air samples from welding workshops showed high levels of contaminants like manganese (Mn) and iron (Fe), with Mn strongly correlating with Fe, while non-welding workshops had elevated copper (Cu) levels.
Health risk assessments indicated that while some metal exposure in welding workshops exceeded permissible limits, the lifetime cancer risks were acceptable, but non-cancer risks for Mn were concerning in both types of workshops.
* A total of 39 studies with nearly 4,000 lung cancer patients and over 3,000 healthy controls were analyzed, revealing that lung cancer patients had significantly higher serum copper/zinc ratios compared to healthy individuals and those with benign lung diseases.
* The findings suggest that an elevated serum copper/zinc ratio may be linked to a higher risk of developing lung cancer, with higher ratios observed in patients at more advanced stages of the disease.