Three cultures were enriched from cork boiling wastewater using tannic acid as the selective carbon substrate, at 25 degrees C and pH 7.2, 25 degrees C and pH 4.7 and 50 degrees C and pH 4.7. The enrichment culture obtained at neutral pH was composed of five culturable isolates, whereas from each acidic enrichment two bacterial strains were isolated. Mesophilic isolates were Gram negative bacte...

Human Cu,Zn-superoxide dismutase (Cu,Zn-SOD) undergoes site-specific and random fragmentation by non-enzymic glycosylation (glycation). Released Cu2+ from the glycated Cu,Zn-SOD probably facilitates a Fenton reaction to convert H2O2 into hydroxy radical, which then participates in the non-specific fragmentation [Ookawara et al. (1992) J. Biol. Chem. 267, 18505-18510]. In the present study, we i...

Tricyclodecan-9-yl-xanthogenate (D609) has been extensively studied in biological systems and exhibits a variety of biological functions, including antiviral, antitumor, and anti-inflammatory activities. Most of these activities have been largely attributed to the inhibitory effect of D609 on phosphatidylcholine-specific phospholipase C. However, as a xanthate derivative, D609 is a strong elect...

The removal efficiency of 4-chlorophenol with different advanced oxidation processes have been studied. Oxidation experiments were carried out using two 4-chlorophenol concentrations: 100 mg L and 250 mg L and UV generated from a KrCl excilamp with (molar ratio H2O2: 4-chlorophenol = 25:1) and without H2O2, and, with Fenton process (molar ratio H2O2:4chlorophenol of 25:1 and Fe concentration of...

A recently developed Pd-based electro-Fenton (E-Fenton) process enables efficient in situ remediation of organic contaminants in groundwater. In the process, H₂O₂, Fe(II), and acidic conditions (~pH 3) are produced in situ to facilitate the decontamination, but the role of ubiquitous natural organic matters (NOM) remain unclear. This study investigated the effect of Aldrich humic acid (HA) on t...

Hydrogen peroxide (H2O2) and Cu(OAc)2 or FeSO4 (Fenton type reagents) perform heparin (Hep) depolymerisation to low-molecular-weight heparin (LMWH) following a radical chain mechanism. Hydroxyl (OH) radicals which are initially generated from H2O2 reduction by transition metal ions abstract hydrogen atoms on the heparin chain providing carbon centred radicals whose decay leads to the depolymeri...

We found recently that intrinsic chemiluminescence (CL) could be produced by all 19 chlorophenolic persistent organic pollutants during environmentally-friendly advanced oxidation processes. Interestingly and unexpectedly, the strongest CL was produced not by the most-highly chlorinated pentachlorophenol (PCP), but rather by the less chlorinated 2,3,5,6-tetrachlorophenol (2,3,5,6-TeCP), one of ...

Abstract In this study, refinery wastewater treatment scheme, the electro-Fenton oxidation process is obtainable. Through Fenton treatment, numerous working limits remained examined, for instance hydrogen peroxide, electrolysis time and pH. The effects of variables including pH (2-9), peroxide concentration (20-60 mg/L) reaction (10-30 minutes) thoughtful through means answer surface methodolog...