Publications of Gilles Colinet
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See detailTemporal evolution of PAHs bioaccessibility in an aged-contaminated soil during the growth of two Fabaceae.
Davin, Marie ULiege; Renard, Elisa; Lefébure, Kévin ULiege et al

in International Journal of Environmental Research and Public Health (2020)

Polycyclic aromatic hydrocarbons (PAHs) are health-concerning organic compounds that accumulate in the environment. Bioremediation and phytoremediation are studied to develop eco-friendly remediation ... [more ▼]

Polycyclic aromatic hydrocarbons (PAHs) are health-concerning organic compounds that accumulate in the environment. Bioremediation and phytoremediation are studied to develop eco-friendly remediation techniques. In this study, the e ects of two plants (Medicago sativa L. and Trifolium pratense L.) on the PAHs’ bioaccessibility in an aged-contaminated soil throughout a long-term rhizoremediation trial was investigated. A bioaccessibility measurement protocol, using Tenax® beads, was adapted to the studied soil. The aged-contaminated soil was cultured with each plant type and compared to unplanted soil. The bioaccessible and residual PAH contents were quantified after 3, 6 and 12 months. The PAHs’ desorption kinetics were established for 15 PAHs and described by a site distribution model. A common Tenax® extraction time (24 h) was established as a comparison basis for PAHs bioaccessibility. The rhizoremediation results show that M. sativa developed better than T. pratense on the contaminated soil. When plants were absent (control) or small (T. pratense), the global PAHs’ residual contents dissipated from the rhizosphere to 8% and 10% of the total initial content, respectively. However, in the presence of M. sativa, dissipation after 12 months was only 50% of the total initial content. Finally, the PAHs’ bioaccessible content increased more significantly in the absence of plants. This one-year trial brought no evidence that the presence of M. sativa or T. pratense on this tested aged-contaminated soil was beneficial in the PAH remediation process, compared to unplanted soil. [less ▲]

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See detailUsing NIRS for analysis of soil clay content
Mariage, Clémence ULiege; Genot, Valérie; Colinet, Gilles ULiege et al

Poster (2020, May)

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See detailRhizoremediation of an aged-contaminated soil with two Fabaceae: impact on PAHs bioaccessibility.
Davin, Marie ULiege; Colinet, Gilles ULiege; Fauconnier, Marie-Laure ULiege

Conference (2020, January 31)

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic compounds that tend to accumulate in the environment. Because of their potential (geno)toxicity and heavy presence in former ... [more ▼]

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistent organic compounds that tend to accumulate in the environment. Because of their potential (geno)toxicity and heavy presence in former industrial areas (Keith 2015), PAHs have been the centre of many remediation studies over the past decades. As an alternative to environmentally aggressive, expensive and often disruptive soil remediation strategies, experiences have been carried on to understand and develop techniques based on bioremediation and phytoremediation, which rely on the use of living microorganisms or plants to remediate pollutions in soil. Because it is now well-known that the most important limiting factor to PAHs bioremediation is their bioaccessibility (Johnsen et al. 2015), the objective of the study was to investigate the effect of two plants (Medicago sativa L. and Trifolium pratense L.) on PAHs bioaccessibility in an aged-contaminated soil throughout a long-term rhizoremediation trial. Therefore aged-contaminated soil samples were cultured with each plant-type, in pots, for 3, 6 and 12 months, and compared to untreated soil. Each modality was repeated five times. Bioaccessible and residual PAHs contents were quantified in soil samples at the end of each culture period using High-Performance Liquid Chromatography with Fluorimetric Detection (HPLC-FLD). The general rhizoremediation results show that (i) M. sativa L. plants developed better than T. pratense L. plants on the contaminated soil, (ii) when plants are small or absent, PAHs residual contents globally dissipate faster from the rhizosphere, and bioaccessible contents increase a little faster. Johnsen AR, Wick LY, Harms H. 2005. Principles of microbial PAH-degradation in soil. Environ Pollut. 133(1):71–84. doi:10.1016/j.envpol.2004.04.015. Keith LH. 2015. The Source of U.S. EPA’s Sixteen PAH Priority Pollutants. Polycycl Aromat Compd. 35(2–4):147–160. doi:10.1080/10406638.2014.892886. [less ▲]

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See detailLong-term fertilization and intensive cropping enhance carbon and nitrogen accumulated in soil clay-sized particles of red soil in South China
Xu, Hu; Liu, Kailou; Zhang, Wenju et al

in Journal of soils and sediments : JSS. (2020), 20(4), 1824-1833

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See detailSpatial variability of soil properties in red soil and its implications for site-specific fertilizer management
SONG, Fang-Fang; XU, Ming-Gang; DUAN, Ying-Hua et al

in Journal of integrative agriculture : JIA = 农业科学学报(英文版) (2020), 19(9), 2313-2325

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See detailInvestigating the Effect of Medicago sativa L. and Trifolium pratense L. Root Exudates on PAHs Bioremediation in an Aged-Contaminated Soil
Davin, Marie ULiege; Starren, Amandine ULiege; Marit, Emilie ULiege et al

in Water, Air and Soil Pollution (2019), 230

Polycyclic aromatic hydrocarbons (PAH) are persistent organic compounds of major concern that accumulate in the environment, especially soils, and require remediation. Researches to develop bioremediation ... [more ▼]

Polycyclic aromatic hydrocarbons (PAH) are persistent organic compounds of major concern that accumulate in the environment, especially soils, and require remediation. Researches to develop bioremediation and phytoremediation (alternative eco-friendly technologies) are being conducted. First, a bioaccessibility measurement protocol was adapted to a brownfield soil using Tenax® beads in order to compare PAHs bioaccessibility in soil samples. PAHs desorption kinetics were established, described by a site distribution model, and a common extraction time was calculated (48 h). Second, the role of two Fabaceae (Medicago sativa L. or Trifolium pratense L.) root exudates in enhancing PAHs bioaccessibility and biodegradation in the studied soil was evaluated during microcosms experiments (28 °C). The CO2 emissions were significantly higher in presence of T. pratense exudates; the dehydrogenase activities showed improvements of the soil microbial activity in presence of two types of root exudates compared to untreated soil samples; the PAHs residual contents decreased more in untreated samples than in the presence of T. pratense exudates; and M. sativa exudates lowered PAHs bioaccessibility but not residual contents. [less ▲]

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See detailModeling interaction between salinity and P availability in plant soil system
Loudari, Aicha ULiege; Colinet, Gilles ULiege; Oukarroum, Abdallah

Conference (2019, November 28)

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See detailDoes innovative P fertilization enhance P use efficiency and plant stress tolerance?
Loudari, Aicha ULiege; Khourchi, Said ULiege; Bourak, Kaoutar ULiege et al

Poster (2019, October 07)

In Africa, agriculture is by far the economic sector that contributes most to the local development and employment incomes. However, limited water availability, nutrient deficiency, soil salinity and ... [more ▼]

In Africa, agriculture is by far the economic sector that contributes most to the local development and employment incomes. However, limited water availability, nutrient deficiency, soil salinity and plant diseases are, among others, the most damaging biotic and abiotic constraints to crop productivity. These constraints impact plant growth by affecting key physiological, biochemical and molecular functions. In addition, many soils exhibit an inherent low fertility level, in particular for phosphorus (P) which represents an adverse constraint to achieve better yields. Our projects aim to improve the fertilizer use efficiency in responses to adequate fertilizer inputs as well as crop responses under two main constraints namely soil salinity and plant diseases. This will allow us to propose an integrated approach in order to develop a more sustainable plant P nutrition. On one hand, a new approach based on root investigation both morphology and functioning (growth mapping, exudates, etc.) and the related rhizosphere microorganisms will be adopted to improve P use and acquisition efficiency. On the other hand, we will investigate the modeling responses of crops to P-fertilization under salinity conditions to develop an early prediction tool to mitigate this constraint. We will also address the impact of P-fertilizers supply on microbial biodiversity and their role on phytopathogenic effect alleviation, which might cause considerable losses in crop production. These projects will contribute to link laboratory to field experiments, for a better understanding of soil-plant-microbe interactions under different biotic and abiotic contexts. [less ▲]

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See detailSANISOL, un outil pilote de recommandations aux producteurs de légumes et de fruits sur sol contaminé en Wallonie (Belgique)
Liénard, Amandine ULiege; Fontenoy, Delphine; Pereira, Benoît et al

Conference (2019, March 26)

Objectif Le projet SANISOL, à travers la mise en œuvre d’un outil informatique pilote sur Internet, vise à fournir des recommandations particulières de gestion et d’utilisation à tout producteur de ... [more ▼]

Objectif Le projet SANISOL, à travers la mise en œuvre d’un outil informatique pilote sur Internet, vise à fournir des recommandations particulières de gestion et d’utilisation à tout producteur de biomasse alimentaire (notamment légumes et fruits) sur sols contaminés en Wallonie. Caractère innovant du sujet proposé L’originalité de cette étude repose sur le caractère multidisciplinaire et multi-acteurs de l’approche. Elle mobilise des compétences en matière d’échantillonnage et d’analyses de sols, de légumes et de fruits ainsi qu’un biomonitoring avec prélèvements d’échantillons biologiques (cheveux, sang, urine), le tout en concertation avec les acteurs régionaux et locaux. Les objectifs poursuivis étant de livrer des recommandations adaptées à la production potagère et à la fréquentation des potagers pour les personnes réalisant une activité de jardinage en vue d’une autoconsommation sur sol contaminé. En outre, elle rassemble des acteurs d’horizons différents : des scientifiques (Université de Liège et Université Catholique de Louvain), des organismes d’intérêt public (SPAQuE, ISSeP, Espace Environnement), le secteur associatif et les pouvoirs publics. Résumé Le projet SANISOL s’articule autour de cinq volets : l’étude des transferts sols-plantes en métaux en jardins potagers, le diagnostic du modèle S-Risk© pour la production végétale, un programme d’action Environnement-Santé à l’aide d’un biomonitoring, la configuration d’un outil informatique pilote et une gestion de la communication avec production d’un contenu « Sols potagers pollués » diffusable au grand public. L’association de ses différentes approches permettra la détermination de teneurs limites en polluants dans le sol en vue d’assurer la qualité commerciale des productions végétales en Wallonie et la gestion des risques pour les producteurs et les jardiniers. En effet, la pratique du jardinage est en recrudescence et elle démontre plusieurs bienfaits physiques, sociaux, psychiques, etc. Cependant, l’autoproduction en jardins collectifs ou privatifs se heurte aux interrogations grandissantes quant aux risques sanitaires liés à la pollution en métaux (arsenic, cadmium, mercure, plomb, zinc, etc.) relevée dans certains sols en Wallonie (provenant des activités industrielles historiques ou du fond pédogéochimique naturel). Au terme du projet, un outil informatique disponible sur Internet, sera capable d’émettre des recommandations sur les productions végétales réalisées sur une parcelle qui aurait fait l’objet d’une analyse de sol, voire de légumes (Figure 1). Par le biais d’un questionnaire, l’utilisateur fournit diverses informations telles que : les concentrations en métaux dans le sol ainsi que le type de légumes ou fruits autoproduits, ses habitudes alimentaires, la fréquentation du jardin potager, etc. Sur base de ces données, un modèle d’évaluation des risques construit à partir d’équations de transfert sols-plantes, de valeurs toxicologiques de références, de valeurs de bioaccessibilité spécifiques à chaque métal générera des recommandations en matière de production végétale et de gestion à la parcelle. [less ▲]

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See detailInvestigating the effect of plants on PAHs dissipation and bioaccessibility in brownfield contaminated soils (3 and 6 months cultures).
Davin, Marie ULiege; Fauconnier, Marie-Laure ULiege; Colinet, Gilles ULiege et al

Poster (2019, February 04)

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistant organic compounds of major concern that tend to accumulate in the environment, damaging ecosystems and health. Brownfields represent an ... [more ▼]

Polycyclic aromatic hydrocarbons (PAHs) are a class of persistant organic compounds of major concern that tend to accumulate in the environment, damaging ecosystems and health. Brownfields represent an important tank for PAHs and require remediation. As an alternative to environmentally aggressive, expensive and often disruptive soil remediation strategies, experiences have been carried on to understand and develop techniques based on bioremediation and phytoremediation. The main objective of the study was to investigate the potential of plants (Medicago sativa L. or Trifolium pratense L.) as PAHs bioremediation enhancers on an aged-contaminated soil. The first step was to adapt a bioaccessibility measurement protocol, using Tenax® beads, to the studied contaminated soil. Meanwhile soil samples were cultured in pots with one of the plant species for three, six, nine, and twelve months and compared to unplanted soil samples. Each modality was repeated five times for a total of 60 samples. PAHs desorption kinetics were established for 15 PAHs and described by a site distribution model. A common Tenax® beads extraction time (24 h) was established as a comparison basis for PAHs bioaccessibility assessments. Bioaccessible and residual PAHs were quantified using High-Performance Liquid Chromatography with Fluorimetric Detection (HPLC-FLD) on the three and six months samples, as the experiment is still underway. Preliminary results will be discussed. [less ▲]

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See detailInfluence of edaphic conditions and nitrogen fertilizers on cadmium and zinc phytoextraction efficiency of Noccaea caerulescens
Jacobs, Arnaud; Noret, N.; Van Baekel, A. et al

in Science of the Total Environment (2019), 665

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium (Cd) and zinc (Zn ... [more ▼]

The success of cadmium phytoextraction operations with Noccaea caerulescens varies by a factor of 70 between sites of trials. However, soil factors driving the efficiency of cadmium (Cd) and zinc (Zn) phytoextraction are still poorly understood, as are the effects of nitrogen fertilizers. We studied biomass production and Cd and Zn uptake by two contrasting populations of N. caerulescens, Ganges (metallicolous) and Wilwerwiltz (non-metallicolous) grown in pots on a range of 24 field contaminated soils for 20 weeks. The addition of KNO 3 and NH 4 NO 3 fertilizers was also tested. Using model averaging of multiple regression models, we show that the major drivers of N. caerulescens growth are physical soil factors such as organic matter and soil bulk density while trace metal accumulation mainly relies on soil Cd and Zn exchangeable concentrations. We confirm the negative effect of soil copper (Cu) on growth, even at exchangeable concentrations below 30 mg kg −1 , and therefore on uptake efficiency, while increasing soil lead (Pb) content was related to increased biomass probably due to a protective effect against soil pathogens. Finally, there is a small positive effect of nitrogen fertilization on biomass production only in soils with low initial nitrogen content (under 25 μg g −1 NO 3 − ), while above this value, the positive impact of initial nitrogen content is offset by lower shoot Cd and Zn concentrations. Our data bring substantial information regarding the physico-chemical properties to ensure N. caerulescens growth: a soil bulk density under 1.05 kg/dm 3 , organic matter above 7% and pH under 7.5. We show that phytoextraction efficiency is maximal for moderate soil contamination in Cd (2–10 mg kg −1 ) and Zn (300–1000 mg kg −1 ). © 2019 Elsevier B.V. [less ▲]

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See detailConcentrations and sources of Cd, Cr, Cu, Fe, Ni, Pb and Zn in soil of the Mitidja plain, Algeria
Laribi, Abdelkader ULiege; Shand, C.; Wendler, R. et al

in Toxicological and Environmental Chemistry (2019), 101(1-2), 59-74

In the last few decades, the Mitidja plain has undergone economic development which may have altered the concentrations of some trace metals in its soils. Therefore, this study was aimed at investigating ... [more ▼]

In the last few decades, the Mitidja plain has undergone economic development which may have altered the concentrations of some trace metals in its soils. Therefore, this study was aimed at investigating the concentrations and sources of Cd, Cr, Cu, Fe, Ni, Pb and Zn in 180 composite topsoil samples using a combination of environmental quality indicators and multivariate statistical approaches with a geographic information system (GIS). Based on spatial distribution maps, various hot-spots have been identified. Enrichment factors (EFs) indicated that Cd, Cu, Pb and Zn were from anthropogenic sources, while Ni and Cr were controlled mainly by natural lithogenic source. Multivariate statistical analyses were in agreement, except for Cu which was classified as coming from both anthropogenic and lithogenic sources. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. [less ▲]

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