EVPP 201 Lecture Notes - Lecture 4: Fungicide, Paper Towel, Swordfish

• School: George Mason University
• Department: Environmental Science and Public Policy
• Course: EVPP 201
• Professor: Ransom

Document Summary

Define heavy metals toxic metals, high-density metallic elements, metals and metalloids that are toxic, trace elements necessary for life but at high dosages, bio accumulate, may collect in the e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t a(cid:374)d do(cid:374)"t decay. Identify persistent heavy metals arsenic, beryllium, cadmium, hexavalent chromium, lead and mercury. Write the scientific symbol for mercury and lead lead = pb and mercury = hg. Identify other metals toxic when present in levels higher than trace amounts cobalt, copper, manganese, nickel, tin, thallium. Explain some of the health risks from heavy and toxic metals some trace metals are necessary for life, but dangerous beyond trace amounts. High levels iron = increased risk of heart disease and high levels of zinc = weakens immune system. May have carcinogenic or birth defects, affects central nervous system (mg, hg, pb, as) and affects kidneys or liver (hg, pb, cd, Cu) and skin, bone or teeth (ni, cd, cu, cr).