Marielle Guéguen Minerbe

Gustave Eiffel University · Comportement Physico-chimique et Durabilité des Matériaux (CPDM)

Injection of liquid foam through soils is increasingly used in applications such as soil remediation or soil improvement, where it is also crucial to control the liquid relative permeability through the foam-filled soil. We have measured the time dependence of the liquid permeability of granular packings initially filled with liquid foam for differ...

Wastewater networks are intrinsically attacked by the production of H2S, a highly reactive gas known for its extremely aggressive nature. This study employs a range of techniques, such as XRD, SEM–EDS, TGA, and Raman spectrometry, to investigate the interaction between low concentrations of H2S—averaging 1.3 ppm and various types of Portland cement...

In this study, an alternative biobased matrix is proposed to replace synthetic fibres or mineral binders that are used as binders between plant particles in insulation materials. This binder is produced from mycelium, the filamentous vegetative part of fungi, and allows the manufacture of 100% biobased mycocomposites. This article presents the resu...

Regulations on wastewater treatment (UWWTD-1991; WFD 2000) have evolved considerably over the past 25 years with the development of increasingly efficient bioprocesses that limit environmental risks. High-performance bio-physico-chemical wastewater treatment technologies were implemented for the plants of the main urban areas i.e. biofiltration, me...

For some applications involving liquid foams, such as soil remediation for example, the liquid relative permeability of the foam-filled porous medium is a crucial parameter as it sets the liquid flow rate at which active substances or nutrients (for bacteria) can be delivered deep into the medium. We are interested in the liquid relative permeabili...

Recycled concrete aggregates (RCA) incorporate hydrates that can be carbonated. The FastCarb project aims to mineralize CO2 within RCA, improving the quality of these aggregates by the clogging of the porosity and finally decreasing the CO2 impact of concrete in structures. It has two main objectives: to optimize in laboratory conditions the accele...

Polymer-modified mortars are cementitious materials that integrate polymers from 5 to 20 wt.%. Those materials are widely used for protecting and/or repairing concrete surfaces among which building facades, civil engineering structures, or sewage networks. In this context, polymer-modified mortars are applied into thin layers of about 1–3 cm. Howev...

This paper investigates bacteria colonisation through biofilm formation, based on the premise that biofilm helps bacteria to have a better development. The aim is to homogenize bacterial growth on recycled concrete aggregates (RCA) to obtain a homogeneous precipitation of calcium carbonate (CaCO 3 ). In previous studies, Bacillus halodurans C-125 w...

Le changement climatique et les modifications de pratiques induisent une augmentation de la teneur en hydrogène sulfuré dans les réseaux d’assainissement. Outre l’aspect sanitaire, l’H2S peut être responsable de la dégradation des canalisations et/ou infrastructures en béton, en particulier lorsqu’il est oxydé par des micro-organismes sulfo-oxydant...

This study examines the evolution of the functional properties of two hemp concretes formulated with two different binders over 2 years in different environmental conditions. Stable environmental conditions (50% RH – 20°C) have been applied to hemp concretes to obtain the reference aging AREF. An accelerated aging process AWD is chosen, consisting...

When formulating materials containing an hydraulic binder and plant particles, the setting of the binder may be slowed or prevented by the compounds extracted from the plant. In this article, a methodology is fixed to analyse three types of hemp shiv and to study the variability of the composition of extractives and their influence on the hydration...

En assainissement, la nitrification est une étape de traitement biologique qui permet, par l’intermédiaire de bactéries nitrifiantes, de transformer les ions ammonium en ions nitrate. Les ouvrages dans lesquels se déroule la nitrification sont construits avec des matériaux cimentaires qui subissent des dégradations de plus en plus visibles ces dern...

Certains additifs ajoutés aux GMB (Géomembranes) utilisées pour l'étanchéité des ouvrages hydrauliques sont extraits vers le milieu environnant (eau et sol). Afin d'évaluer l'impact écotoxicologique de ces composés chimiques sur le milieu, des GMB en polypropylène (PP) et polyéthylène haute densité (PEHD) sont immergées dans des solutions aqueuses...

Flax fibers are commonly used to reinforce mechanical properties of polymer-matrix composites, but can also enhance antioxidative properties of polyethylene matrix: lignin, which is one of the components of plant fibers has the advantage of containing phenols, molecules well known for their antioxidant properties. In this study, its oxidative stabi...

Functional properties of vegetal concretes, such as hygrothermal and acoustical properties, are brought by the microstructure of the vegetal particles. However, data are necessary to develop biobased insulation materials by providing results on their long-term behaviour, and only few studies focus on this topic. A first step is to characterise the...

Several deteriorations of concrete were detected in sewer environment. Some of these deteriorations are due to H2S presence in the aerial part of sewer pipe. Indeed, some microorganisms (mainly sulfur-oxidizing microorganisms) consume H2S as nutrients and provoke oxidation of H2S into sulfuric acid. This sulfuric acid production leads to the cement...

Numerous deteriorations of concrete were detected in sewer environment. Some of these deteriorations are due to H2S presence in the aerial part of sewer pipe. Indeed, some microorganisms (mainly sulfur-oxidizing microorganisms) consume H2S as nutrients and provoke oxidation of H2S into sulfuric acid. Sulfuric acid production leads to the cementitio...

In the context of biocorrosion of concrete sewer pipes, this study aims at characterizing the alteration layers present on different types of cementitious materials (ordinary Portland cement: CEM I, blended Portland cement: CEM III, calcium aluminate cement: CAC). The studied samples resulted from laboratory expositions to H2S under abiotic and bio...

Biobased materials are increasingly being used for building insulation. Hemp concrete is an efficient thermal insulation material containing renewable resources, providing living comfort thanks to its acoustical and hygrothermal properties. In this study, two hemp concrete ‘wall’ formulations are manufactured with the same type of hemp shiv and two...

A chemical-reactive transport model is used to simulate the sulfuric acid attack of cement pastes based on ordinary Portland cement (CEM I), blended Portland cements (CEM III, CEM IV, and CEM V), and calcium aluminate cement (CAC). This model accounts for the dissolution of cement hydrates (portlandite, C-S-H, hydrogarnet), and the precipitation of...

Geomembranes (GMs) are widely used in hydraulic applications. Unfortunately, some additives contained in GMs are extracted upon prolonged contact with water or soil. Depending on their chemical nature, additives contained within GMs or degradation products thereof may affect natural ecosystems. To better understand this effect, the present study ev...

Différentes dégradations des matériaux cimentaires sont observées dans les réseaux d'assainissement. Certaines de ces dégradations sont, par exemple, provoquées par la présence de l'hydrogène sulfuré dans la partie aérienne des canalisations. En effet, des micro-organismes sulfooxydants, constituant en partie le biofilm déposé sur la paroi cimentai...

Mortars based on different compositions (cast with calcium aluminate cement (CAC), ordinary Portland cement (CEM I), blended Portland cement (CEM III, CEM IV, CEM V) and super sulphated cement (SSC)) were exposed to gaseous H2S. The most soluble phases from cement lead to the presence of ions in a water layer formed on the mortar surface and these...

Biobased materials are increasingly used for building insulation. Hemp concrete (mix of hemp aggregates and mineral binder) is an efficient thermal insulation material containing renewable resources. It provides also comfort in habitation thanks to its acoustical and hygrothermal properties. In this study, two hemp concrete “wall” formulations are...

Major deteriorations of concrete in sewer networks are observed due to hydrogen sulfide emission. The presence of this gas leads to the decrease of concrete surface pH and then to the development of sulfur-oxidizing bacteria which produce sulfuric acid. Local deteriorations of concrete sewer pipes, based on dissolution-precipitation mechanisms and...

Le béton de chanvre est un matériau biosourcé performant pour l’isolation des bâtiments. Il améliore aussi le confort au sein de l’habitat grâce à ses propriétés hygrothermiques et acoustiques. Le matériau est constitué de granulats végétaux très poreux (chènevotte) qui sont agglomérés à l’aide d’un liant minéral à base de chaux ou de ciment. Les p...

The present study deals with the exposure of four different mortar formulations in the headspace of two distinct sewer networks prone to biodeterioration phenomenon due to the presence of hydrogen sulphide. Cylindrical specimens composed of two cements, ordinary Portland cement (OPC) and calcium aluminate cement (CAC), with or without a substitutio...

Important deteriorations have been observed in concrete sewers, due to hydrogen sulfide (H2S) production. Hydrogen sulfide environment involves the selection of sulfur-oxidizing bacteria (bacteria able to oxidize the reduced sulfur compounds) in contact with the cementitious materials. These biological reactions lead to a local production of sulfur...

The study of hemp concrete durability needs to understand the mechanisms involved in the modifications of the material properties. The methodology of this work is presented in this article. A bibliographic research allowed us to determine the parameters inducing evolutions of the material characteristics. Variations of relative humidity, the microo...

Concrete deterioration is extensively observed due to hydrogen sulphide emission in sewerage networks. The presence of this gas leads to the development of sulphur-oxidizing bacteria which produce sulphuric acid. Local deterioration of concrete sewer pipes, based on dissolution-precipitation mechanisms and the formation of ettringite and gypsum, de...

La production de carbonates de calcium par les bactéries est un processus utilisé dans différents domaines. Ce procédé de biocarbonatation a d'abord été étudié et employé pour traiter les pierres ornementales calcaires dans le but de les préserver et de les réparer. Des recherches ont ensuite été menées afin d'utiliser cette capacité des micro-orga...

According to the FD P18-011 standard, it is recommended to protect concrete when the exposure conditions to chemicals exceed specific thresholds. For wastewater infrastructures exposed to biocorrosion initiated by the presence of H2S, this standard recommends the application of a coating to protect the concrete when maximum thresholds are exceeded....

Flax reinforced polyethylene composites were subjected to a long sorption /desorption/resorption cycle, at 30°C and 100% relative humidity. Then, a multi scale characterization was conducted. The sorption kinetics revealed the influence of the fibre content and the interface quality on the diffusion mechanisms. Chemical analysis has revealed leachi...

Sewer networks should withstand several aggressions, including biodeterioration processes. This study is focusing on cementitious materials since, depending on their composition, these materials do not display the same behaviour when biogenic sulfuric acid attack occurs. In severe conditions, ordinary Portland cement materials can be deteriorated,...

Cementitious materials biodeterioration in sewer networks is an important problem for sewer networks managers. This deterioration process is due to the implication of two biofilm involved in the sulfur cycle. Microorganisms of the first biofilm will reduce sulfate and organic sulfur compounds into H2S in the effluent and then, the second biofilm ox...

Sewer networks are subjected to degradation, including biodeterioration of materials, in the presence of biogenic sulfuric acid, leading to costly repairs. To ensure durable structures, it is essential to select the best adapted materials. Two cementitious materials based on ordinary Portland cement (OPC) or calcium aluminate cement (CAC), were sub...

A material, from its manufacture and throughout its service life, may suffer attacks that impact its initial properties. Depending on the environment in contact with this material it could be a physical, a chemical, a biological, or a combined aggression. Microbially induced corrosions which affect all materials are frequently encountered in variou...

Sewer networks are subjected to many corrosion agents leading to deterioration of variant magnitude. One type of damage can be ascribed to concrete corrosion by biogenic sulfuric acid. According to field data, cementitious materials have different behaviours depending more especially on cement type. Those made with calcium aluminate cement (CAC) of...

Aggregates coming from different plants are used as substitutes of mineral aggregates for the creation of lightweight and insulating concrete, efficient either on an environmental or on a technical point of view. In France, the most used vegetal aggregates are hemp shiv, corresponding to the woody core part of the stalks of the plant. The oldest co...

Sewer networks are subjected to many degradations including biodeterioration of materials in the presence of biogenic sulfuric acid, leading to costly rehabilitation. To ensure durable structures, it is necessary to select the most adapted materials. Two cementitious materials based on ordinary Portland cement (OPC) or Calcium Aluminate Cement (CAC...

Geotrichum candidum ATCC 204307 was previously found to generate phenyllactic acid (PLA) and indolelactic acid (ILA) in complex culture media. In this study, a relationship between concentrations of PLA, ILA, hydroxy-PLA (OH-PLA) and initial concentrations of phenylalanine, tryptophan and tyrosine, added respectively as unique sources of nitrogen i...

Bacterial aggregation and/or adhesion are key factors for the digestive ecosystem colonization and ability of probiotic strains to exclude pathogens. In the present study, two probiotic strains, Lactobacillus rhamnosus CNCM-I-3698 and Lactobacillus farciminis CNCM-I-3699 were evaluated as viable or heat-killed forms and compared with probiotic refe...

Sewer networks enclose many biological and chemical transformations involving sulfur molecules oxidation leading to biogenic sulfuric acid production. Sewage effluents contain many sulfur species such as sulfates and sulfites which are reduced in anoxic zones by sulfate reducing bacteria (Desulfovibrio sp., Desulfobulbus sp.) into hydrogen sulfide...

Sewer networks are subjected to biodeterioration, a damaging process based on the production of sulfuric acid by microorganisms in specific conditions. Aerial part of this phenomenon can be divided in four elementary stages. The study of the mechanisms both on-site and in the lab could generate consistent information for the design of an accelerate...

Le milieu régnant dans les réseaux d’assainissement est agressif pour les matériaux et notamment pour les matériaux cimentaires. La présence de sulfure de dihydrogène (H2S) va permettre le développement de bactéries sulfo-oxydantes qui vont oxyder les molécules soufrées en acide sulfurique qui va réagir avec les matériaux cimentaires pour former de...

The aim of this study was to evaluate the importance of biotransformation of paralytic shellfish toxins during the detoxification process in contaminated oysters. Mathematical models based upon the detoxification patterns of digestive gland and other tissues were developed. It was demonstrated that biotransformations do not seem to play an importan...

Shellfish farming is a common industry along European coasts. According to the 2005-2006 data from the French National Shellfish Farming Committee (CNC - Comité National de la Conchyliculture 2010; see Table 1 for a list of acronyms and abbreviations used in this chapter), Spain is the largest shellfish producer in Europe (∼270,000 t) and France ra...

The purpose of this study is to implement models to describe detoxification kinetics of Blue mussels Mytilus edulis containing lipophilic phycotoxins taking into account environmental variables (cholorophyll and temperature). The Norwegian monitoring data are among the most interesting to be exploited to work on the establishment of kinetics predic...

This study assessed the effects of an artificial bloom of the toxin-producing dinoflagellate, Alexandrium minutum, upon nutrition related processes and reproductive output of the Pacific oyster, Crassostrea gigas. Oysters were exposed to A. minutum, Paralytic Shellfish Toxins (PST) producer and compared to a control batch of oysters fed Isochrysis...

The effects of an artificial bloom of the toxin-producing dinoflagellate, Alexandrium minutum, upon physiological parameters of the Pacific oyster, Crassostrea gigas, were assessed. Diploid and triploid oysters were exposed to cultured A. minutum and compared to control diploid and triploid oysters fed T. Isochrysis. Experiments were repeated twice...

Contamination of shellfish by paralytic shellfish poisoning ( PSP) toxins poses an economic threat to shellfish farmers. As contaminated shellfish cannot be harvested for long periods of time, it would be very useful to develop processes to optimise and shorten their detoxification. In this study, Pacific oysters Crassostrea gigas were first experi...

In October and November 2003 a bloom of the toxic dinoflagellate Alexandrium catenella was observed in the North-east zone of Thau lagoon (French Mediterranean coast). Sea water samples were collected every hours to evaluate time-related variations of phytoplankton concentrations and to compare the relative ratio of A. catenella versus other phytop...

The occurrence of new phytoplankton species in a coastal area may be explained by the import of shellfish containing whole live algal cells in their digestive tracts. Indeed, shellfish containing toxic algal cells can induce both primary contaminations in safe areas (initially free from toxic microalgae), and secondary contaminations of other shell...