Encyclopedia of Environmental Science and Engineering, Volume I and II
956 PESTICIDES INTRODUCTION Man employs pesticides as purposeful environmental con- taminants in order to improve environmental ...
PESTICIDES 957 An estimate for 1982 indicated that 113 million hectares of cropland were treated with 337 million kilograms of p ...
958 PESTICIDES conventional pesticides that are normally applied at about 1 kg per ha, provided for major improvements in the ef ...
PESTICIDES 959 (Quinby and Doornick, 1965). Spraying of apple orchards from ground air blast equipment has resulted in concen- t ...
960 PESTICIDES of the wells in the potato growing area of Suffolk Co. New York had aldicarb residues of 7 ppb with maximum conce ...
PESTICIDES 961 or water weeds is an obvious source of contamination. Rates of application commonly range from 0.1–1 kgha of wat ...
962 PESTICIDES Soil Residues of Pesticides Monitoring studies made of pesticide residues in soils of the heavily treated cotton ...
PESTICIDES 963 the Delaney Clause of the FDCA states that no tolerance may be set for any pesticide found to be oncogenic. Based ...
964 PESTICIDES National Academy of Sciences study (1987) concluded that nearly 80% of the estimated oncogenic risk to humans is ...
PESTICIDES 965 of this remark-able phenomenon resulted from the treatment of Clear Lake, California with DDD at 0.014−0.02 ppm a ...
966 PESTICIDES as: fathead minnows concentrated endrin 10,000 ; croak- ers concentrated DDT 20,000 ; trout concentrated dieldr ...
PESTICIDES 967 phorate are acutely toxic to birds but their use patterns are such that damage to bird populations has not been e ...
968 PESTICIDES azinphos, malathion, dimethoate, dichlorvos, diazinon, chlor- pyrifos, fenthion, mevinphos, phosphamidon, naled, ...
PESTICIDES 969 Other Pesticides in Humans Other stable organochlorine insecticides or their stable metab- olites are also found ...
970 PESTICIDES parathion, 0,0 -diethyl 0 - p -nitrophenyl phosphorothionate pendimethalin, N- (1-ethylpropyl)-3,4-dimethyl-2,6-d ...
PESTICIDES 971 U.S. Dept. Interior (1968) Water Quality Criteria, Reports of National Tech- nical Advisory Committee to Secretar ...
972 PHYSICAL AND CHEMICAL TREATMENT OF WASTEWATERS INTRODUCTION The substances in domestic and industrial wastewater having sign ...
PHYSICAL AND CHEMICAL TREATMENT OF WASTEWATERS 973 (3) lower initial plant cost, (4) ability to remove nitrogen and phosphorus, ...
974 PHYSICAL AND CHEMICAL TREATMENT OF WASTEWATERS cost of the coagulants and the difficulty of disposing of the larger amount o ...
PHYSICAL AND CHEMICAL TREATMENT OF WASTEWATERS 975 The precise zeta potential that yields optimum coagu- lation must be determin ...
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