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MAJOR CLASSES OF CONTAMINANTS - Coggle Diagram
MAJOR CLASSES OF CONTAMINANTS
ORGANIC (living organisms)
INORGANIC (mineral sources)
Metalloids (semimetals)
Non-metals
Metal
Heavy metals
pollutant
density > 5
Trace metals
contaminant
in trace amounts, < ppb levels
Essential
Fe, I, Cu, Mn, Zn, Co, Mo, Se, Cr, Ni, Si, As
Non-essential
Cd, Hg
NUTRIENTS
N fertilizer, P fertilizer
Eutophication
ORGANIC COMPOUNDS
Oil
Gas, liquids, or solids
PAHs
Incomplete combustion (burning), 2-6 rings
From : human activity or natural conditions
PCBs
Synthetic compounds (manifactured)
Used for
Dielectric fluids
Heat transformer
Vacuum pump fluids
etc.
Chlorinated phenols
Wood preservatives (TCP) and fungicides (PCP)
200,000 Xenobiotics
Organochlorines
pesticides/insecticide
DDD ( -H)
DDE (double bond C)
DDT (-Cl)
Chlorinated cyclodiene insecticides
Aldrin
Dieldrin
Heptachlor
after DDT, high toxicity, persistence
dioxins
Organophosphate insecticides
PBB
Detergents
Organometallic compounds