Pierre Le Cloirec

Pierre Le Cloirec
Ecole Nationale Supérieure de Chimie de Rennes · Department of Environmental Engineering

PhD chemistry, PhD Physics

About

379
Publications
73,221
Reads
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12,538
Citations
Additional affiliations
September 1995 - December 2006
September 1990 - August 1995
Education
May 1983 - October 1985
Université de Rennes 1
Field of study
  • Physics
February 1981 - May 1983
Université de Rennes 1
Field of study
  • Chemistry
September 1976 - June 1979
Ecole Nationale Supérieure de Chimie de Rennes
Field of study
  • Chemical Engineering

Publications

Publications (379)
Article
The addition of powdered activated carbon (PAC) and a coagulant during the coagulation-flocculation process is an easy and common option for tackling pollution peaks from organic micropollutants (OMPs) in the production of drinking water. However, the adsorption-desorption mechanisms during this process have not been thoroughly explored. Thus, this...
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
For potential use in air treatment by biofiltration, a new material composed of vermicompost and earthworms (Eisenia fetida) was tested for the removal of a volatile organic compound (VOC), toluene. The removal rate of toluene was measured during batch experiments in presence of vermicompost only, earthworms only and a mixture of both. In the chose...
Article
The biofiltration of hydrogen sulfide present in a biogas mimic under anoxic conditions was performed using expanded schist and cellular concrete waste as packing materials. The impact of various parameters, such as H2S concentrations, Empty Bed Residence Time (EBRT) and molar ratio N/S, on the performances of biofilters was evaluated. At an EBRT o...
Article
The objective of this study was to investigate the removal of hydrogen sulfide (H2S) present in air using cellular concrete waste as the packing material. Air filtration was performed under biotic and abiotic conditions. Experiments were carried out in a laboratory-scale PVC column (internal diameter of 300 mm) filled with a volume of 70 L of cellu...
Article
Three volatile organic compounds (benzene, cyclohexane, dichloromethane) were adsorbed onto activated carbon fiber cloth. 1H (MAS and PFG) NMR techniques were carried out and the signals were analyzed in terms of peak surface areas and shifts. These techniques were shown to be very useful for determining i) the intrinsic quantification of adsorbed...
Chapter
The objectives of this chapter are to present gas and liquid filtrations, mainly focussing on the adsorption of organic compounds from fluids onto activated carbon fibers in their different forms (cloth, felts, knitted). The separation of target organics in complex mixtures and/or the purification of fluids (water, wastewater, air, biogas) are chal...
Article
The treatment of hydrogen sulfide using a biofilter packed with expanded schist and topped with a layer of a synthetic nutritional material (UP20) was examined at a constant H2S concentration (100 ppmv). The impact of the empty bed residence time (EBRT) on process performances was clearly underlined by varying the polluted air flow from 4 to 20 m3...
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
Perception of tastes and odors in water is a major interest for water producers and distributors because off-flavors in tap water are associated with health risk by consumers. However, the taste of water is difficult to describe due to the medium itself which is supposed to have no taste. Classical sensory methodologies are difficult to adapt and o...
Article
La pulpe de betterave, déchet de l'industrie sucriè-re est étudiée pour son utilisation dans l'élimination de cations métalliques présents dans les effluents aqueux. Les meilleures conditions opératoires (pré-paration du matériau, effet du pH…) sont définies. Les cinétiques d'élimination s'avèrent être relative-ment rapides (≤ 90 min), les capacité...
Article
Although biogases mainly consist of a mixture of carbon dioxide and methane, traces of volatile organic compounds are present, and these undesirable compounds must be removed during the purification process. Adsorption onto an activated carbon fiber cloth (ACFC) was investigated and, in particular, the feasibility of electrothermal desorption. Five...
Article
Although biogases mainly consist of a mixture of carbon dioxide and methane, traces of volatile organic compounds are present, and these undesirable compounds must be removed during the purification process. Adsorption onto an activated carbon fiber cloth (ACFC) was investigated and, in particular, the feasibility of electrothermal desorption. Five...
Article
Full-text available
Usually, organoleptic criteria have to be fulfilled for tap water in order for it to be considered safe to drink. This can be achieved at three levels: chemical analysis, sensory analysis, or through electrophysiology. While chemical analysis has been quite extensively discussed in the literature and as consumer perception is of vital importance, w...
Article
Chlordecone (also known as Kepone) was used extensively in the French West Indies until 1993. This persistent pollution raises the question of the faith of this pesticide through water treatment plants and its eventual release in the environment. To address this issue, a two- step methodol. is herein proposed. First, a complete description of the a...
Book
Full-text available
Profit and protection are two fundamental reasons to clean up waste gas streams. According to the nature of the contaminants and/or the complex mixture of pollutants in the gaseous phase, their concentrations and the flow to be cleaned, removing non-particulate pollutants from a gas stream is achieved by different processes classified into three ca...
Book
This paper is to present the general operating methods and some applications of gas stream treatments, esp. the removal of volatile org. or inorg. compds., by bioscrubbers. Specific points and general applications of this process are developed a) principles of a bioscrubber and general operating conditions b) biotreatment of pollutant families and...
Book
Biological processes for air treatment are particularly suitable for odors generated by industrial waste gas emissions, even though bioscrubbing is still little used industrially. The aim of this chapter is to present the implementation of bioscrubbers in two different applications. The first one is related to the treatment of a gaseous effluent fr...
Article
Full-text available
Robust and cheap, biofiltration is one of the most used methods for the biological treatment of industrial gaseous odours and VOCs emissions. The chemical, physical and microbial properties, as well as the economical impact of 11 organic and inorganic packing materials potentially suitable for biofiltration, have been investigated in order to selec...
Article
Full-text available
Four room temperature ionic liquids, [BMIM][PF6], [BMIM][NTf2], [PEGMIM][PF6], and Aliquat, were investigated regarding their use in a two-phase partition bioreactor dedicated to remove two hydrophobic VOC, dimethyldisulfide and toluene. Aliquat and [PEGMIM][PF6] cannot be further considered, owing to the toxicity of the former shown during glucose...
Article
This study aims to evaluate the feasibility of using a nutritional synthetic material (UP20) combined with fibrous peat as a packing material in treating H2S (up to 280 ppmv). Three identical laboratory-scale biofilters with different packing material configurations (peat only; peat + UP20 in a mixture; peat + UP20 in two layers) were used to deter...
Chapter
Biological processes for air treatment are particularly suitable for odors generated by industrial waste gas emissions, even though bioscrubbing is still little used industrially. The aim of this chapter is to present the implementation of bioscrubbers in two different applications. The first one is related to the treatment of a gaseous effluent fr...
Chapter
Biological air treatment processes have been available for many years. Among these, biofilters (filter beds, biocatalysts), biotrickling filters and bioscrubbers are implemented. In a bioscrubber, a large number of soluble and biodegradable molecules are transferred into an aqueous phase and degraded in an activated sludge reactor. This process is...
Article
Due to the incomplete mineralisation of some organic compounds during the incineration of municipal solid waste, gaseous emissions are loaded with a large amount of particulate matter, undesirable elements and toxic molecules. Typically, an incinerator of urban solid waste produces large flows of hot gaseous emissions to be purified before being re...
Article
Since usual processes involve water as absorbent, they appear not always really efficient for the treatment of hydrophobic volatile organic compound (VOC). Recently, absorption and biodegradation coupling in a two-phase partitioning bioreactor (TPPB) proved to be a promising technology for hydrophobic compound treatment. The choice of the organic p...
Article
During biological degradation, such as biofiltration of air loaded with volatile organic compounds, the pollutant is passed through a bed packed with a solid medium acting as a biofilm support. To improve microorganism nutritional equilibrium and hence to enhance the purification capacities, a Biological Activator Formulated Material (BAFM) was dev...
Article
The effect of activated sludge acclimation on the biodegradation of toluene and dimethyldisulphide (DMDS) in the presence of a non-aqueous phase liquid, polydimethylsiloxane (PDMS), in a two-phase partitioning bioreactor was characterized. The influence of the presence of PDMS, at a ratio of 25% (v/v), and acclimation of activated sludge on two hyd...
Article
The volume ratio between Non-Aqueous Phase Liquid (NAPL) and water was optimised in order to remove the two hydrophobic volatile organic compounds (VOCs), toluene and dimethyldisulfide (DMDS). Biological oxygen demand after 5 days (BOD5) measurements showed that ratios ranging from 20 to 30% of silicone oil in water enabled optimal removal of both...
Article
A general research program, focusing on activated carbon fiber cloths (ACFC) and felt for environmental protection was performed. The objectives were multiple: (i) a better understanding of the adsorption mechanisms of these kinds of materials; (ii) the specification and optimization of new processes using these adsorbents; (iii) the modeling of th...
Article
In this research work, the three different VOCs such as acetone, dichloromethane and ethyl formate (with corresponding families like ketone, halogenated-organic, ester) are recovered by using temperature swing adsorption (TSA) process. The vapors of these selected VOCs are adsorbed on a microporous activated carbon. After adsorption step, they are...
Article
A methodology to determine the diameter of an absorber contacting a gas phase and two immiscible liquid phases (water/silicone oil mixture) is presented. The methodology is applied to a countercurrent gas/liquid randomly packed column for the absorption of three VOCs (toluene, dimethyl sulfide, or dimethyl disulfide). Whatever the silicone oil volu...
Article
The regeneration experiments of dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of...
Article
Full-text available
In this paper, the performances of three industrial biofilters treating rendering odorous emissions and the packing material evolution are presented and discussed. The biofilters were packed with a mixture of peat and heather, treating about 50 000 m3.h-1 of rendering gases which presented typical odorous concentrations ranging from 1 350 to 22 000...
Article
The regeneration experiments of dichloromethane from activated carbon bed had been carried out by both hot nitrogen and steam to evaluate the regeneration performance and the operating cost of the regeneration step. Factorial Experimental Design (FED) tool had been implemented to optimize the temperature of nitrogen and the superficial velocity of...
Article
Organic vapors emitted from solvents used in chemical and pharmaceutical processes, or from hydrocarbon fuel storage stations at oil terminals, can be efficiently captured by adsorption onto activated carbon beds. To recover vapors after the adsorption step, two modes of regeneration were selected and could be possibly combined: thermal desorption...
Article
The potential of four ILs for whole-cell biotechnological processes was evaluated in terms of toxicity and biodegradability. From the four ILs tested, only Aliquat completely inhibited the microbial glucose uptake at a concentration of 5%, while [PEGMIM][PF6] was completely soluble in water. Therefore, these ILs were discarded for further studies....