What are VOC's? (Volatile Organic Chemicals)
VOC's are volatile organic chemicals, which means that they evaporate at lower temperatures. They are low weight. It is harder for the carbon to adsorb VOC's than chlorine. It needs more contact time and a uniform media for VOC adsorption. Trihalamethanes
Trihalamethanes (THM's) are a volatile organic chemical (VOC) which are produced when chlorine interacts with organics in the water (dead leaves, sediment etc.). Various THMs have been classified by the EPA as probable or possible human carcinogens, and have been associated with bladder and rectal cancer according to studies registered with the EPA and research performed by Dr. Robert Morris of the Medical College of Wisconsin, and others. Trihalamethanes (THM's) are the main culprit in chlorine studies proving bladder cancer is linked to chlorine. o There are 4 types of trihalomethanes (chloroform, bromoform,dichloromethane and dibromochlorine.) chloroform is the most unstable and therefore is released into the atmosphere more quickly, and is the expected carcinogen. The other three are progressively more stable. the maximum allowable in our water according to epa is .1ppm. /100 ppbillion. | Sources of VOC's
(Source Environmental Protection Agency MCL Chart) Pesticides & Herbacides & Insecticides are made with a lot of VOCs and may contain the following. Dalapon effects Liver, kidney, found as Herbicide on orchards, beans, coffee, lawns, road/railways Dinoseb Thyroid, reproductive organ dmg Runoff herbicide frmcrp & non-crpapplctns Diquat effects-Liver, kidney, eye effects Runoff of herbicide onland aquatic weeds Dioxin-Cancer -Chemical production by-product; impurity in herbicides Endothall effctsLvr, kdny, gstrointstnl Herbicide crops, land/aquatic weeds Endrineffects Liver, kidney, heart damage Pesticide on insects, rodents, birds; restricted since 1980 Glyphosate-Liver, kidney damage Herbicide on grasses, weeds, brush Hexachlorobenzene-Cancer Pesticide production waste by-product Hexachlorocyclopentadiene-Kidney, stomach damage Pesticide production intermediate Oxamyl (Vydate)-Kidney damage Insecticide on apples, potatoes, tomatoes Picloram-Kidney, liver damage Herbicide on broadleaf and woody plaots Simazine-Cancer Herbicide on grass sod, some aops, aquatic algae 1,2,4-Trichlorobenzene-Liver, kidney dmg Herbicide production; dye carrier |
