Photodechlorination of 3,3'-dichlorobenzidine in water

Marianne C Nyman¹, Ken S Haber, Hilkka I Kenttämaa

¹Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA. nymanm@rpi.edu

|March 7, 2002

Abstract:

Laboratory experiments have been conducted to elucidate the photochemical behavior of 3,3'-dichlorobenzidine (DCB) and its congeners in aquatic systems. Photodechlorination of DCB was observed in aqueous samples that were irradiated with monochromatic radiation from a variable-wavelength laser at several wavelengths in the range 300 nm < or = lambda < or = 360 nm. Analytical measurements performed by high-performance liquid chromatography (HPLC) and Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry revealed that 3-chlorobenzidine (MCB) was produced as a transient intermediate in the photodechlorination process, with subsequent photodechlorination to yield benzidine as a stable photoproduct. Data obtained from these measurements also suggest the existence of other (unidentified) reaction pathways and products. The time-course measurements of chlorobenzidine congener concentrations and irradiance history were combined with a simple reaction model to develop estimates of reaction kinetics. Model predictions were consistent with results obtained for all wavelengths investigated.

Related Experiment Videos

Photodechlorination of 3,3'-dichlorobenzidine in water

Related Concept Videos

Classification of N-Nitrosamines and Other Nitroso Compounds by Using Tandem Mass Spectrometry Experiments Based on Collision- Activated Dissociation.

Interpretable machine learning-based automated HPLC/MS2 platform using ion-molecule reactions for the identification of functionalities in analytes.

Active air stripping and direct point exhaust of trichloramine (NCl3) from indoor pools.

Barriers and facilitators to the utilisation of point-of-use water treatment systems during and immediately following flood-related disasters: a scoping review protocol.

Unwrapping the Dodecaborane Core: Structure, Electronic Properties, and Chemical Reactivity Across the Complete [B12In]- Series (n = 11-1).

Synthesis of 2-Tetrazenes and the Fragmentation Behavior of Their Ions in Tandem Mass Spectrometry.

The Effect of Water Hardness on the Sensitivity of Freshwater Mussel Glochidia to Sodium Chloride and a Road Salt Alternative De-icing Product.

Microplastic fibers can alter viral disease severity, contingent on particle shape and exposure timing.

Transcriptomic points of departure from the aquatic insect Chironomus dilutus for 22 per- and polyfluoroalkyl substances (PFAS) and their use in chemical hazard screening.

Polychlorinated Diphenyl Ethers and One Health: An Integrated Perspective on an Underestimated Class of Persistent Organic Pollutants.

Acute toxicity and tissue concentrations of 6PPD-quinone in Arctic grayling (Thymallus arcticus, Thymallinae).

Horizon Scanning to Identify Emerging Environmental Health Concerns: Community-Based Strategies to Shift from Reactive to Proactive Approaches.

CPL inversion via switching between prompt fluorescence and afterglow phosphorescence in chiral Al(III) and In(III) complexes.

pKa engineering of a near-infrared fluorescent probe for sensitive imaging of oxidative stress in atherosclerotic plaques.

Dermoscopic CIELab Colorimetry for Longitudinal Monitoring of Fixed Target Lesions in Psoriasis: Objective Quantification of Background Color and Vascular Density.

Efficacy of fluorescein angiography guided 532 nm continuous-wave green laser used as a non-damaging subthreshold laser in the treatment of central serous chorioretinopathy.

Structural and functional analysis of a photosystem II mutant PsbA3-S264V.

Selective H2O2 photosynthesis in ferroelectric photocatalyst: rare-earth 4f-state-mediated charge-spin regulation.

Related Experiment Videos

Photodechlorination of 3,3'-dichlorobenzidine in water

Abstract:

Related Concept Videos

Related Articles