Catalytic effects of activated carbon on hydrolysis reactions of chlorinated organic compounds

Hexachlorocyclohexanes in the Environment: Mechanisms of Dechlorination

“…Without activated carbon, the results from Mackenzie et al 57 were similar to the findings of Ngabe et al 50 and Cristol et al 51,52 At solution pH values between 10 and 13, the second-order rate constants were determined to be in the range of 0.01-0.04 L/mol-s. They observed the typical pseudo-firstorder kinetics with PeCCH as the intermediate and the three TCB isomers as end products.…”

“…The proportion of 1,3-DCB and 1,2-DCB increased slightly with increasing pH, whereas 1,4-DCB was flavored under acidic conditions. Mackenzie et al 57 used deuterated water (D 2 O) as solvent, and observed that the TCBs or DCBs formed were free of deuterium. These results suggested that hydrolysis was not involved in product formation and that the redox reaction takes place with direct participation of AC.…”

“…Mackenzie et al 57 found that activated carbon (AC) can also catalyze the dechlorination of γ -HCH. Aqueous solutions containing 5 mg/L freely dissolved lindane buffered at pH values from 7.0 to 13.0 were tested with and without activated carbon.…”

Catalytic degradation of the soil fumigant 1,3-dichloropropene in aqueous biochar slurry

“…Mackenzie et al (2005aMackenzie et al ( , 2005b reported that the hydrolysis reactions of activated carbon-adsorbed lindane and 1,1,2,2-tetrachloroethane are faster than those of the dissolved compounds at neutral or slightly alkaline pH; however, the mechanism controlling the catalytic effects was unclear. In addition, organic contaminants may react directly or indirectly with environmentally persistent free radicals (EPFRs) by activating other small molecular free radicals, such as hydroxyl radical (•OH), or even oxygen Fang et al, 2014Fang et al, , 2015.…”

Simultaneous absorption of NO and SO2 into FeII–EDTA solution coupled with the FeII–EDTA regeneration catalyzed by activated carbon

“…Georgi et al [19] reported their research on the oxidation of organic contaminants with hydrogen peroxide catalyzed by activated carbon. Mackenzie et al [20] tested the catalytic effects of activated carbon on hydrolysis reactions of chlorinated organic compounds. Santos et al [21] explored the catalytic characteristics of activated carbon in the decolourisation of dye solutions by oxidation with H 2 O 2 .…”