English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This preliminary study aims to examine, at laboratory scale, the mechanisms and performances provided by coupling the enhanced solubility abilities of cyclodextrin solutions for removal of 2,4,6-Trinitrotoluene (TNT) from contaminated soil with advanced oxidation processes (AOPs) that are regarded as the most effective approaches in treatment of wastewater contaminated with persistent and toxic organic pollutants. In recent years, different Fenton technologies have turned out to be quite appealing to eliminate recalcitrant organic pollutants. Among the different Fenton-like technologies currently available, indirect electrochemical treatment, namely electro-Fenton process, has appeared to be quite efficient in eliminating refractory organic compounds from aqueous media. HPLC/DAD was employed to monitor the TNT degradation and to identify the aromatic intermediates formed during the electro-Fenton oxidation of TNT. Absolute rate constant of TNT hydroxylation by hydroxyl radicals was determined as 2.06 × 10 10  M -1  s -1  using competition kinetics method. Complete mineralization of synthetic solutions was achieved after quite long oxidation time (8 hours). After successive TNT hydroxylations, oxidative opening of the highly oxidized TNT aromatic ring quickly occurred within 20 minutes, leading to the accumulation of two main short chain carboxylic acids such as oxalic and glyoxylic acids. Our results also indicated that cyclodextrin had little effect on the degradation rates of TNT. This relative improvement in TNT degradation could be explained by the formation of the ternary complex (TNT-cyclodextriniron). Degradation of TNT included in cyclodextrin complex was unaffected by hydroxyl radical scavengers which would, in any case, justify the use of a Fenton-like process for the final treatment of soil extract solutions.

Electro-Fenton Treatment of TNT in Aqueous Media in Presence of Cyclodextrin. Application to Ex-situ Treatment of Contaminated Soil