Peroxidase-active cell free extract from onion solid wastes: biocatalytic properties and putative pathway of ferulic acid oxidation

Removal of Phenol from Synthetic and Industrial Wastewater by Potato Pulp Peroxidases

“…Juice from cut roots of Raphanus was also able to decontaminate phenol-polluted synthetic wastewater (Naghibi et al 2003 ). The peroxidase-containing homogenate from onion solid waste, obtained after peeling the bulbs, was examined for its ability to oxidize caffeic acid, the main contaminant in wastewater from olive mills (El Agha et al 2008 ). Minced shepherd’s purse ( Capsella bursa - pastoris ) roots were used for the remediation of soil contaminated with 2,4-dichlorophenol (Park et al 2006 ).…”

Chlorogenic Acid Oxidation by a Crude Peroxidase Preparation: Biocatalytic Characteristics and Oxidation Products

“…Contrary to that, favorable temperatures were found to lie between 5 and 20°C, which is significantly lower than that found for quercetin (Osman et al 2008) and hydrocaffeic acid (40°C;El Agha et al 2008a) and also lower than those observed for ferulic and CA (30°C; El Agha et al 2008bAgha et al , 2009.…”

“…In the case of CGA, the molar ratio found was 1.6, which is higher than those reported for structurally similar hydroxycinnamate derivatives, including hydrocaffeic acid (El Agha et al 2008a) and CA (El Agha et al 2009), where the H 2 O 2 /substrate ratios determined were 1.33 and 0.8, respectively. However, this value is lower than that reported for FA, which was 2.56 (El Agha et al 2008b). Furthermore, the horseradish peroxidase (HPR)-mediated oxidation of several phenolic pollutants, including 2-chlorophenol, 4-chlorophenol, o-cresol, p-cresol, and 2,4-dichlorophenol, showed that the ratios may vary from 0.7 to 0.9 (Caza et al 1999).…”

“…The ability of POD to form ferulic and caffeic acid (CA) dimers has been shown using an enzyme preparation from Bupleurum salicifolium callus cultures (Luis et al 2005), but more recently, the generation of FA (El Agha et al 2008a) and hydrocaffeic acid (El Agha et al 2008b) dimers, as well as CA tetramers (El Agha et al 2009), has been possible using a POD preparation from onion solid wastes.…”

Potato Pulp as the Peroxidase Source for 2,4-Dichlorophenol Removal

“…An alternative to HRP is soybean peroxidase-an enzyme with comparable thermal stability and susceptibility to inactivation [12]. Besides that, bitter gourd, radish and agricultural wastes were assessed as a source of peroxidases for remediation purposes [5,9,14].…”