Nicolas Cimetiere

Nicolas Cimetiere
Ecole Nationale Supérieure de Chimie de Rennes · Department of Chemistry and Engineering of Processes (CIP)

PhD (Environmental Chemistry)

About

26
Publications
16,491
Reads
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304
Citations
Additional affiliations
September 2006 - September 2009
Université de Poitiers · Ecole Nationale Supérieure d'Ingénieurs de Poitiers (ENSIP)
Position
  • PhD Student
Description
  • Etude de la décomposition de la monochloramine en milieu aqueux et réactivité avec des composés phénoliques. Decomposition of monochloramine in water and reactivity with phenolic compounds.

Publications

Publications (26)
Article
The volatility of N,N-dichloromethylamine (DCMA), a disinfection by-product formed during chlorination of swimming pool water, has been investigated in the present work. The Henry's law constants for DCMA were experimentally determined at five temperatures (5, 15, 25, 35 and 45 degrees C) using the single equilibrium technique. The volumic ratio be...
Article
The presence of pesticides (alachlor, metolachlor and atrazine) is a major concern for the production of drinking water. However, their main metabolites, namely oxanilic acid (OA) and ethanesulfonic acid (ESA) for alachlor and metolachlor, and desethyl- and deisopropyl-atrazine for atrazine, are also encountered in natural waters. The adsorption of...
Article
Full-text available
This study assessed the environmental footprint of emerging micropollutants in Cambodia and France. The aim was to develop and apply an analytical method to detect micropollutants in diverse water sources and climatic regions. Consequently, an analytical method, using online solid-phase extraction coupled with an ultra-performance liquid chromatogr...
Article
The presence of pharmaceutical residues in water resources is a critical issue for the production of drinking water, even though trace concentrations are mostly encountered. The adsorption of eight micropollutants, in mixture, onto a microporous activated carbon fiber cloth was investigated. For each compound, the kinetics and isotherms of adsorpti...
Article
Disinfection by-products (DBPs) are formed in swimming pools by the reactions of bather inputs with the disinfectant. Although a wide range of molecules has been identified within DBPs, only few kinetic rates have been reported. This study investigates the kinetics of chlorine consumption, chloroform formation and dichloroacetonitrile formation cau...
Article
A scale-up procedure was assessed in this study to predict the fixed bed adsorption behaviors with aging granular activated carbon (GAC) for various micropollutants (pesticides, pharmaceuticals). Two assumptions of this upscaling methodology (i.e., involving equal adsorption capacities and surface diffusivities between the batch test and the fixed...
Presentation
Full-text available
7th International Conference 2017 on Swimming Pool and Spa.
Article
Activated carbon fiber cloths (ACFC) have shown promising results when applied to water treatment, especially for removing organic micropollutants such as pharmaceutical compounds. Nevertheless, further investigations are required, especially considering trace concentrations, which are found in current water treatment. Until now, most studies have...
Article
The present work describes the development of an analytical method, based on automated on-line solid phase extraction followed by ultra high-performance liquid chromatography coupled with tandem mass spectrometry (SPELC- MS/ MS) for the quantification of 37 pharmaceutical residues, covering various therapeutic classes, and some of their main metabo...
Article
Les medicaments a usage humain ou veterinaire se retrouvent, par differents moyens, dans les milieux aquatiques et notamment dans les filieres de potabilisation des eaux. Les medicaments sont en partie metabolises apres ingestion (le pourcentage depend du principe actif et est compris entre 1 et 99 %). Des medicaments se retrouvent alors dans les e...
Article
Quinapril and quinaprilat are two angiotensin-converting enzyme inhibitors (ACEIs) characterized by a peak broadening and splitting when they were analyzed by ultra-performance liquid chromatography (UPLC). This phenomenon is due to the existence of the two isomers cis and trans around the amide band. In order to confirm the existence of the two co...
Article
Pharmaceuticals for human or veterinary use are found, by various means, in aquatic environments and particularly in drinking water treatment plants. Pharmaceuticals are partially metabolized after ingestion (the percentage depends on the parent drug and falls between 1 and 99%), and consequently pharmaceuticals can be found in drinking water at co...
Article
The sorption of nalidixic acid (NA) was studied onto three kinds of magnetite characterized by different particle sizes (from micrometric to nanometric) and surface properties. Experiments were performed under static batch and dynamic flow conditions. Obtained results indicate that kinetics and extent of sorption was strongly affected by the partic...
Article
UV dechloramination has become a very popular process for reducing the concentration of chloramines in public swimming pool water. As the effects of this process on the formation of disinfection by-products (DBPs) remain a controversial issue, a bench-scale study has been undertaken to examine the impact of UV dechloramination on the formation of v...
Article
Full-text available
Quinapril undergoes a significant degradation in the solid state, specially in the presence of humidity, temperature and pharmaceutical excipients. Since dissolution increases the degradation, hydrolytic reactions are among the most common processes involved in drug degradation. Improving the knowledge regarding drug stability, particularly concern...
Article
Full-text available
The study of the occurrence and fate of pharmaceutical compounds in drinking or waste water processes has become very popular in recent years. Liquid chromatography with tandem mass spectrometry is a powerful analytical tool often used to determine pharmaceutical residues at trace level in water. However, many steps may disrupt the analytical proce...
Article
Various regulatory authorities like International Conference on Harmonization (ICH), US Food and Drug Administration, Canadian Drug and Health Agency are emphasizing on the purity requirements and the identification of impurities in active pharmaceutical drugs. Qualification of the impurities is the process of acquiring and evaluating data that est...
Article
The effects of various factors (N/Cl ratio used to prepare monochloramine, monochloramine doses, pH and contact time) on the monochloramine demand and on the chloroform yield during chloramination of resorcinol have been investigated. Chloramination experiments were carried out at 24+/-1 degrees C, at pH values ranging from 6.5 to 12 using a bicarb...
Article
The kinetics of monochloramination of resorcinol, 4-chlororesorcinol, and 4,6-dichlororesorcinol have been investigated over the pH range of 5-12, at 23 +/- 2 degrees C. Monochloramine solutions were prepared with ammonia-to-chlorine ratios (N/Cl) ranging from 1.08 to 31 mol/mol. Under conditions that minimize free chlorine reactions (N/Cl > 2 mol/...

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Projects

Project (1)
Archived project
The aim of this research is to improve the coagulation step and to evaluate enhanced coagulation with ferric chloride and aluminum sulfate as coagulants combined powdered activated carbon (PAC) as coagulant aid to achieve the required TOC and micropollutant removal in drinking water treatment plants.