Enhanced enzymatic removal of chlorophenols in the presence of co-substrates

Peroxidase catalyzed co-polymerization of pentachlorophenol and a potential humic precursor

“…However, this result was obtained in an experiment where no humic substances were present. To assess the fate of PCP in soil, it is necessary to consider the participation of humic substances in any transformation process (Tatsumi et al, 1994a(Tatsumi et al, , 1994bRoper et al 1995;Ruttimann-Johnson and Lamar, 1996). Model experiments (Morimoto and Tatsumi, 1997) have shown that the oxidation of PCP in the presence of potential humic precursors such as p-coumaric acid or p-hydroxybenzoic acid can remove up to 90% of the PCP.…”

Deodorization of pig manure using lignin peroxidase with different electron acceptors

“…In addition, it is clear that the decrease in VFA and indolic odorant concentration was relatively unlike that of phenolic odorants. Previous studies indicated that the phenolic and nonphenolic aromatic compounds can be oxidized with a free radical chain reaction by LiP (Kersten et al, 1990;Roper et al, 1995). Phenolic compounds are generally the substrates preferred over indolic compounds and VFAs for LiP.…”

“…The proposed enzymatic methods have generated great interest recently. Oxidoreductase, such as lignin peroxidase (LiP), and horseradish peroxidase (HRP) have been demonstrated to remove phenolic and nonphenolic aromatic compounds or transform those compounds into less toxic polymers, such as transforming phenols in industrial wastewater (Garyet al, 1983;Dec et al, 1994;Roper et al, 1995;Tonegawa et al, 2003). Subsequently, several other oxidoreductases, such as tyrosinase and laccase, have been successfully tested (Dec et al, 1994;Shuttleworth et al, 1986).…”

Ligninolytic Enzymes for Water Depollution, Coal Breakdown, and Paper Industry

“…Laccases oxidizes many substrates phenolic dyes Ishihara et al 1997;Dwran et al 2000), phenols (Dahiya et al 1998;Gianfreda et al 1998;Pothast et al 1997), chlorophenols (Dec and Bollag 1994;Dec and Bollag 1995;Raper et al 1995;Grey et al 1998;Kadhim et al 1999), lignin related diphenyl methanes (Xu et al 1997;Crestini and Argyropoulos 1998), benzopyrenes (Rama et al 1998), N-substituted p-phenylenediamines (Krikstopaitis et al 1998), (Adler 1977) organophosphorus (Amitai et al 1998) and non-phenolic beta-o-lignin model dimmer (Kawai et al 1999;Majcherczyk et al 1999). Laccase being multi-copper containing oxidase that catalysed the monoelectric oxidation of a range of inorganic and aromatic substances with relatively low redox potentials with reduction of O 2 to water (Baldrian 2006), including degradation of lignin and related compounds (Xu 1996).…”