Pentachlorophenol monomers

Source Hexachlorobenzene may enter the environment from incomplete combustion of chlorinated compounds including mirex, kepone, chlorobenzenes, pentachlorophenol, PVC, polychlorinated biphenyls, and chlorinated solvents (Ahling et al., 1978 Dellinger et al., 1991). In addition, hexachlorobenzene may enter the environment as a reaction by-product in the production of carbon tetrachloride, dichloroethylene, hexachlorobutadiene, trichloroethylene, tetrachloro-ethylene, pentachloronitrobenzene, and vinyl chloride monomer (quoted, Verschueren, 1983). 

Over the past few years several biocides have been converted to monomers containing ester, amide, or ether functions which bind the biocide and the polymerization of these monomers was studied.12-16 fhe biocides examined included pentachlorophenol, 1,12-16 8-hydroxyquinoline,2,12,14-16 3 4, 5-tribromosalicy-lanilide,3,12, 14-16 o-benzyl-p-chlorophenol,4,14-16 salicy-lanilide,5,12 2-(4 -thiazoyl)benzimidazole,6,12 and 2-mercapto-pyridine-N-oxide, 7. 

Similar in vitro studies were also conducted on copolymers of 8 and 14 as well as on three terpolymers containing 14 (See Table 11). Both free pentachlorophenol and monomer 14 give zones of inhibition in control experiments because they migrate from... 

The decomposition of pinacyanol chloride dye using octahedral layered mixed-valent manganese oxides has been published [81]. Catalytic reduction reactions using birnessite have been tried for removing pentachlorophenol (PCP) from soil and water (detoxyfication) [82]. Transformation and dechlorination of PCP incubated with peroxidase, laccase, or birnessite is decreased in the presence of humic monomers as cosubstrate. The dehalogenation number for birnessite is 3.3, compared with 3.5 for peroxidase and 1.5 for laccase [82]. 

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