This work evaluates the integration of dehalogenation with Zero Valent Iron (ZVI) and electrochemical oxidation (EO) for treatment urines polluted iodinated X-ray contrast media (ICM). To do this, different strategies were evaluated: pretreatment ZVI followed by EO (ZVI-EO) or electrolysis enhanced ZVI-dehalogenation (EO/ZVI). For comparison purposes, single was also performed to check best str...

A wide variety of haloorganic compounds undergo reductive dehalogenation by certain anaerobic microorganisms. Metabolic reductive dehalogenation is coupled with energy-conserving respiratory electron transport in which a halogenated compound is used as the terminal electron acceptor, the biological process called dehalorespiration or halorespiration. Dehalorespiring bacteria may play important ...

Chlorination of antibiotic fortimicin A with triphenylphosphine and carbon tetrachloride has been attempted, and 2-chloro-, 2,5-dichloro-, and 2-chloro-4-ene derivatives have been obtained. Successive dehalogenation of the chlorinated fortimicins A with tributylstannane gave the corresponding deoxyfortimicins A. Among five deoxyfortimicins A, 2-deoxyfortimicin A exhibits improved antimicrobial ...

The presence of ecotones in transition zones between geological strata (e.g. layers gravel and sand interbedded with silt distal alluvial fan deposits) aquifers plays a significant role regulating the flux matter energy compartments. Ecotones are characterised by steep physicochemical biological gradients considerable diversity. However, link organic pollutants degradation potential has scarcel...

Abstract Due to the toxicity of bioaccumulative organohalides human beings and ecosystems, a variety biotic abiotic remediation methods have been developed remove from contaminated environments. Bioremediation employing organohalide-respiring bacteria (OHRB)-mediated microbial reductive dehalogenation (Bio-RD) represents cost-effective environmentally friendly approach attenuate highly-halogena...

Chlorobenzenes are reductively dechlorinated by anaerobic bacterial cultures obtained from sediments and sludge. Recently a strain was isolated that couples reductive dechlorination of chlorobenzenes with energy conservation. The results reviewed in this article suggest that additional anaerobic bacteria, thriving by dehalogenation of chlorobenzenes or chlorobiphenylic compounds, can be isolated.

An effective method was developed to prepare triphenyleno[1,2,3,4-ghi]perylenediimide derivatives, via ICl-induced annulation, dehalogenation, followed by photocyclization. A perylenediimide (PDI) dimer featuring a terphenyl bisethynylene linker was thereby transformed into a benzo[k]tetraphene fused with two benzoperylenediimides. These PDI derivatives exhibited electron mobility up to 0.079 c...

O-Arylation reaction is obtained when N-(2-halophenyl) indolo carboxamides are irradiated in a basic medium. On the basis of photochemical and photophysical experiments, we propose that 2-indolylbenzoxazole is formed by intramolecular electron transfer followed by fast dehalogenation of the halophenyl radical anion pendant moiety, finally a radical-radical collapse renders the observed product.