PMID: 11922062Apr 2, 2002Paper

Kinetics and mechanism of oxidation of tetrachloroethylene with permanganate

Chemosphere
Kun-Chang HuangG M Dobbs

Abstract

The kinetics, reaction pathways and product distribution of oxidation of tetrachloroethylene (PCE) by potassium permanganate (KMnO4) were studied in phosphate-buffered solutions under constant pH, isothermal, completely mixed and zero headspace conditions. Experimental results indicate that the reaction is first-order with respect to both PCE and KMnO4 and has an activation energy of 9.3+/-0.9 kcal/mol. The second-order rate constant at 20 degrees C is 0.035+/-0.004 M(-1) s(-1), and is independent of pH and ionic strength (I) over a range of pH 3-10 and I approximately 0-0.2 M, respectively. The PCE-KMnO4 reaction may proceed through further oxidation and/or hydrolysis reaction pathways, greatly influenced by the acidity of the solution, to yield CO2(g), oxalic acid, formic acid and glycolic acid. Under acidic conditions (e.g., pH 3), the further oxidation pathway will dominate and PCE tends to be directly mineralized into CO2 and chloride. Under neutral (e.g., pH 7) and alkaline conditions (e.g., pH 10), the hydroxylation pathway dominates the reaction and PCE is primarily transformed into oxalic acid prior to complete PCE mineralization. Moreover, all chlorine atoms in PCE are rapidly liberated during the reaction and the rat...Continue Reading

Citations

Apr 17, 2013·Environmental Science and Pollution Research International·Xiao-Yi LouJian-She Liu
Mar 28, 2013·Environmental Technology·Senthilnathan Nachiappan, Karuppan Muthukumar
May 17, 2013·Chemistry Central Journal·Paul B FayadSébastien Sauvé
Dec 5, 2006·Journal of Contaminant Hydrology·J HønningP L Bjerg
Oct 11, 2005·Journal of Contaminant Hydrology·Michael A Urynowicz, Robert L Siegrist
Oct 19, 2005·Journal of Contaminant Hydrology·Xihong ZhaiLinda S Lee
May 7, 2016·Journal of Contaminant Hydrology·Amy N PiscopoJoseph R Kasprzyk
Apr 29, 2014·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Adam Tressler, Christopher Uchrin
Mar 21, 2017·Environmental Technology·Roger Matta, Serge Chiron
May 21, 2005·Toxicon : Official Journal of the International Society on Toxinology·Xiaoguo ChenXiaoqing Xu
Sep 21, 2018·Environmental Science and Pollution Research International·Zong-Han YangChih-Ming Kao
Mar 9, 2011·Environmental Science & Technology·Paweł AdamczykPiotr Paneth

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.