heavy metals
Scientific and environmental term for metallic elements with high density or atomic weight, often associated with toxicity (e.g., lead, mercury, cadmium).
Heavy metals contained in factory wastewater have become a problem.
この魚からは重金属が検出されなかった。
No heavy metals were detected in this fish.
This fish contains heavy metals.
Heavy metals were detected in the water quality test.
That river is contaminated with heavy metals.