A possible new disinfection by-product--2-chloro-5-oxo-3-hexene diacyl chloride (COHC)--in formation of MX by chlorinating model compounds.

Water Res

State Key Laboratory of Pollution Control and Resource Reuse School of Environment, Nanjing University, China.

Published: November 2002

AI Article Synopsis

  • MX is identified as a significant carcinogenic disinfection by-product (DPB) in chlorinated drinking water.
  • Laboratory studies revealed that MX is produced mainly from chlorinated substituted aromatic aldehydes and amino acids, while a new compound, COHC, was detected in certain aromatic compounds.
  • COHC, potentially interfering with MX detection, has been found in drinking water and chlorinated fulvic acid solutions from Tai Lake, warranting further investigation.

Article Abstract

MX was widely considered as one of the most important disinfection by-products (DPBs) and as the strong carcinogen in the chlorinated drinking water. Some model compounds which have been classified into four families were chlorinated at laboratory conditions. MX was produced only in the chlorinated substituted aromatic aldehydes and amino acids, while a possible new compound (COHC) was found in some substituted aromatic aldehydes, chlorinated substituted aromatic acids and phenols. Through the analysis of the peaks presented in mass spectrum, the composition and structure of the new compound are proposed as 2-chloro-5-oxo-3-hexene diacyl chloride (COHC) which could cause interference in the detection of MX. COHC has also been found in drinking water and extracted chlorinated fulvic acid solution from the sediment and water of Tai Lake, so it should bring about more attention.

Download full-text PDF

Source
http://dx.doi.org/10.1016/s0043-1354(02)00190-2DOI Listing

Publication Analysis

Top Keywords

substituted aromatic
12
diacyl chloride
8
model compounds
8
drinking water
8
chlorinated substituted
8
aromatic aldehydes
8
chlorinated
5
disinfection by-product--2-chloro-5-oxo-3-hexene
4
by-product--2-chloro-5-oxo-3-hexene diacyl
4
chloride cohc--in
4

Similar Publications

Anharmonic computations reveal an intense, narrow (20 cm, 0.043 μm) absorption feature at approximately 2160 cm (4.63 μm) in the vibrational spectra of 14 prototypical singly isocyano-substituted polycyclic aromatic hydrocarbons (NC-PAHs) attributed to the NC stretching mode.

View Article and Find Full Text PDF

The vapor-phase alkylation of phenol with methanol was investigated on X zeolites and modified X zeolites. First, the difference of product distribution was tested between acid zeolite (HZSM-5, HX, HMCM-22, and Hβ) and basic zeolite X (KX and CsX). Then, X zeolites were modified with Li, K, Cs, Ca, Mg, La, and Ce ion exchange to adjust the acid-base properties of the zeolites.

View Article and Find Full Text PDF

Metal-Free Synthesis of Functionalized Indolizines via a Cascade Michael/S2/Aromatization Reaction of 2-Alkylazaarene Derivatives with Bromonitroolefins.

ACS Omega

December 2024

School of Pharmacy, Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Medical University, Guiyang 550014, P. R. China.

A transition metal-free domino Michael/S2/aromatization annulation of 2-pyridylacetates with bromonitroolefins has been developed. A wide range of substrates containing various substituted groups was compatible with the present methodology and afforded functionalized indolizines with moderate to excellent yield (up to 99% yield). In addition, the potential practicality of the method stood out through scale-up reactions and further transformations to other valuable compounds.

View Article and Find Full Text PDF

An efficient synthesis of continuously substituted quinoline derivatives palladium-catalyzed intramolecular 6- imidoylative cyclization of -alkenyl aryl isocyanides with (hetero)aryl halides or vinylic triflates has been developed. The reaction proceeds through the concerted metalation-deprotonation (CMD) mechanism by activation of a vinyl C-H bond with imidoylpalladium assisted by the carboxylate.

View Article and Find Full Text PDF

Excited-state intramolecular proton transfer (ESIPT) reactions are one of the fundamental energy transformation reactions in catalysis and biological process. The combining ESIPT with the twisted intramolecular charge transfer (TICT) brings the richness of optical, photoelectronic performances to certain functional compounds. Delineating the mechanism of ESIPT + TICT reactions and further understanding why a specific functional group dominates are fundamentally crucial for the design and application of the functionally photoelectric materials.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!

A PHP Error was encountered

Severity: Notice

Message: fwrite(): Write of 34 bytes failed with errno=28 No space left on device

Filename: drivers/Session_files_driver.php

Line Number: 272

Backtrace:

A PHP Error was encountered

Severity: Warning

Message: session_write_close(): Failed to write session data using user defined save handler. (session.save_path: /var/lib/php/sessions)

Filename: Unknown

Line Number: 0

Backtrace: