HAL (Le Centre pour la Communication Scientifique Directe), Jun 14, 2023
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Environmental Science and Pollution Research, Nov 4, 2011
The future 'Calanque Nati... more The future 'Calanque National Park' coastlines of the Bouches-du-Rhône and Var departments in France, constitute one of the ten biodiversity hot spots identified in the Mediterranean basin that receives industrial and urban wastewaters discharged from Marseille and its suburbs. Organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) were measured in sediments collected from 12 sampling sites (C1-C12) of sewage discharge to the sea from the wastewater treatment plant of Cortiou-Marseille. This study aims to determine the extent of these compounds in the sediments and to establish the possible sources of these contaminants. Total pesticides in the sediments ranged from 1.2 to 190.6 ng g(-1) dry weight of sediment. The highest value was found at station C1, with a decreasing trend in total OC concentrations seaward. Among these compounds, the concentrations of the sum of dichlorodiphenyltrichloroethane (ΣDDT) were the highest, ranging from 0.7 to 114.3 ng g(-1). PCB concentrations, expressed as equivalent to Arochlor 1260, varied from 9.1 to 226.9 ng g(-1). Individually, the dominant coplanar PCB congeners CB-153, CB-138 and CB-101. Generally, PCB concentrations at stations C2, C3, C5 and C7 were higher than those at stations C10, C11 and C12. Through some pollution indices, we showed the long-term contamination input of these OCs (DDT, endosulfan, HCH and heptachlor cases) rather than a recent release resulting from degradation and long-term weathering (dieldrin, aldrin and methoxychlor cases). Occurrence of PCBs might be due to their resistance to degradation processes or/and chronic inputs. By comparison with available sediment quality guideline (SQG) values, the environmental significance and toxicological implications of PCBs and OCs (i) reveal the probable adverse effects for the sediments from C1, C5, C6, C9 and (ii) confirm the adverse effect for marine biota and more particularly for benthic communities at C2-C4, C7 and C8.
Parameters optimization using experimental design for headspace solid phase micro-extraction anal... more Parameters optimization using experimental design for headspace solid phase micro-extraction analysis of short-chain chlorinated paraffins in waters under the European water framework directive,
The Loire estuary runs through important urban sites with shipping, industrial and agricultural a... more The Loire estuary runs through important urban sites with shipping, industrial and agricultural activities, being the receptacle of diffusive pollutants comprising, a mixture of contaminants such as persistent organic pollutants (POPs). This work was set out to evaluate the occurrence of thyroid endocrine disruptors in sediments of this estuary. Sediments were collected in September 2012 and April 2013, in subtidal zones along the estuary. Targeted chemical analyses of five classes of pollutants, i.e. polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs), alkylphenols (APs), and bisphenol A (BPA) were performed in sediment extracts. Extracts were further tested for their thyroid hormone (TH) disrupting potency to compete with TH for binding to its transporter protein transthyretin (TTR). The Haute-Indre site was characterized by a significant PAH contamination whereas Saint-Nazaire, Bellevue and Rezé would be particularly contaminated by PCBs. These observations could be linked to the different type of anthropogenic activities taking place close to these sites. Donges, Mindin and Paimboeuf were the sampling sites Highlights PCBs, PBDEs, PAHs, APs and BPA found in subtidal sediments of Loire estuary Contamination depending on the anthropogenic activities close to the sampling sites TTR-binding assay highlighting weak activity of sediment extracts No relationship found between TTR-binding potencies and target compound levels
Trichloroanisoles (TCA) might contribute to several unsolved earthy-musty taste episodes, because... more Trichloroanisoles (TCA) might contribute to several unsolved earthy-musty taste episodes, because their taste threshold concentrations are lower than the CLSA GC-MS detection limit. The relative importance of such taste-causing compounds in earthy-musty taste episodes in distribution systems was investigated by combining lab-scale and water aging experiments in a pipe loop pilot. Experiments showed that earthy-musty taste associated with TCA formation can easily occur in distribution systems and is linked mainly to fungi metabolism. By maintaining chlorine residual, a control of such tastes can be achieved. The masking effect of these earthy-musty tasters induced by TCA by chlorine is not very effective.
<p>Chlordecone (CLD; C<sub>10</sub>Cl<sub&gt... more <p>Chlordecone (CLD; C<sub>10</sub>Cl<sub>10</sub>O) is an organochlorine pesticide extensively used between 1960s and 1990s in the French West Indies (FWI). Its massive use led to soil and river pollution which prompted its ban in 1993. CLD has a bis-homocubane structure and various chlorine atoms making it highly recalcitrant in the environment. To date, several environmental compartments of the FWI continue facing the legacy of CLD pollution. This study aims at improving the monitoring of the degradation (or recalcitrance) extent of CLD in the soils of the FWI following in situ chemical reduction (ISCR). Multi-element compound-specific isotope analysis (ME-CSIA) was used to identify changes of stable isotopes of CLD (i.e., <sup>13</sup>C/<sup>12</sup>C and <sup>37</sup>Cl/<sup>35</sup>Cl) produced during distinct abiotic reductive transformation reactions. Reductive transformation of CLD was tested in abiotic microcosms in the presence of either zero-valent iron, ascorbic acid, vitamin B<sub>12,</sub> or persulfate activated by microwave irradiation. CLD transformation was evidenced by the detection of several hydrochlordecones (after losses of one or two chlorine atoms) under all conditions. Enrichment of the <sup>13</sup>C isotopes of CLD relative to <sup>12</sup>C revealed distinct signatures during transformation reactions of CLD to maximum Δδ<sup>13</sup>C of +7.2 ‰. A novel stable Cl isotope analysis was performed by liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QToF-MS). Ongoing Cl isotope analysis may establish a multi-element assessment in which abiotic CLD degradation pathways may be distinguished based on stable C-Cl signatures. Altogether, our results may provide an improved strategy to elucidate CLD degradation in contaminated soils of the FWI.</p>
HAL (Le Centre pour la Communication Scientifique Directe), 2008
Noms des co-auteurs et organismes de rattachement Ce rapport fait la synthèse des travaux d'un co... more Noms des co-auteurs et organismes de rattachement Ce rapport fait la synthèse des travaux d'un consortium de 10 équipes de recherche rattachées à 9 laboratoires, 4 organismes de recherche et 3 universités. Les personnes ayant contribué de façon significative à ce travail et considérées comme co-auteur sont citées dans l'ordre de leur laboratoires. Laboratoires partenaires (ordre alphabétique) CEREGE : Laboratoire physico-chimie des interfaces, (UMR 6635 et IFR
The occurrence of tastes and odours (T&O) in potable water is considered one of the main problems... more The occurrence of tastes and odours (T&O) in potable water is considered one of the main problems by the drinking water companies. Thus, several treatment processes have been developed over the years to control T&O, including air stripping, activated carbon and oxidation using ozone. However, little information is available in the literature on the use of membranes for T&O removal. Therefore, the objective of this paper is to present potential of membrane processes for the removal of taste and odour-causing compounds. Several membranes were tested including ultrafiltration (UF), UF combined with powdered activated carbon (PAC), nanofiltration (NF) and low pressure reverse osmosis (LP RO) membranes. Combination of UF with PAC was found to be effective for T&O control. The use of NF or LP RO is still unclear in the objective of T&O control.
HAL (Le Centre pour la Communication Scientifique Directe), Jun 14, 2023
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Environmental Science and Pollution Research, Nov 4, 2011
The future 'Calanque Nati... more The future 'Calanque National Park' coastlines of the Bouches-du-Rhône and Var departments in France, constitute one of the ten biodiversity hot spots identified in the Mediterranean basin that receives industrial and urban wastewaters discharged from Marseille and its suburbs. Organochlorine pesticides (OCs) and polychlorinated biphenyls (PCBs) were measured in sediments collected from 12 sampling sites (C1-C12) of sewage discharge to the sea from the wastewater treatment plant of Cortiou-Marseille. This study aims to determine the extent of these compounds in the sediments and to establish the possible sources of these contaminants. Total pesticides in the sediments ranged from 1.2 to 190.6 ng g(-1) dry weight of sediment. The highest value was found at station C1, with a decreasing trend in total OC concentrations seaward. Among these compounds, the concentrations of the sum of dichlorodiphenyltrichloroethane (ΣDDT) were the highest, ranging from 0.7 to 114.3 ng g(-1). PCB concentrations, expressed as equivalent to Arochlor 1260, varied from 9.1 to 226.9 ng g(-1). Individually, the dominant coplanar PCB congeners CB-153, CB-138 and CB-101. Generally, PCB concentrations at stations C2, C3, C5 and C7 were higher than those at stations C10, C11 and C12. Through some pollution indices, we showed the long-term contamination input of these OCs (DDT, endosulfan, HCH and heptachlor cases) rather than a recent release resulting from degradation and long-term weathering (dieldrin, aldrin and methoxychlor cases). Occurrence of PCBs might be due to their resistance to degradation processes or/and chronic inputs. By comparison with available sediment quality guideline (SQG) values, the environmental significance and toxicological implications of PCBs and OCs (i) reveal the probable adverse effects for the sediments from C1, C5, C6, C9 and (ii) confirm the adverse effect for marine biota and more particularly for benthic communities at C2-C4, C7 and C8.
Parameters optimization using experimental design for headspace solid phase micro-extraction anal... more Parameters optimization using experimental design for headspace solid phase micro-extraction analysis of short-chain chlorinated paraffins in waters under the European water framework directive,
The Loire estuary runs through important urban sites with shipping, industrial and agricultural a... more The Loire estuary runs through important urban sites with shipping, industrial and agricultural activities, being the receptacle of diffusive pollutants comprising, a mixture of contaminants such as persistent organic pollutants (POPs). This work was set out to evaluate the occurrence of thyroid endocrine disruptors in sediments of this estuary. Sediments were collected in September 2012 and April 2013, in subtidal zones along the estuary. Targeted chemical analyses of five classes of pollutants, i.e. polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), polycyclic aromatic hydrocarbons (PAHs), alkylphenols (APs), and bisphenol A (BPA) were performed in sediment extracts. Extracts were further tested for their thyroid hormone (TH) disrupting potency to compete with TH for binding to its transporter protein transthyretin (TTR). The Haute-Indre site was characterized by a significant PAH contamination whereas Saint-Nazaire, Bellevue and Rezé would be particularly contaminated by PCBs. These observations could be linked to the different type of anthropogenic activities taking place close to these sites. Donges, Mindin and Paimboeuf were the sampling sites Highlights PCBs, PBDEs, PAHs, APs and BPA found in subtidal sediments of Loire estuary Contamination depending on the anthropogenic activities close to the sampling sites TTR-binding assay highlighting weak activity of sediment extracts No relationship found between TTR-binding potencies and target compound levels
Trichloroanisoles (TCA) might contribute to several unsolved earthy-musty taste episodes, because... more Trichloroanisoles (TCA) might contribute to several unsolved earthy-musty taste episodes, because their taste threshold concentrations are lower than the CLSA GC-MS detection limit. The relative importance of such taste-causing compounds in earthy-musty taste episodes in distribution systems was investigated by combining lab-scale and water aging experiments in a pipe loop pilot. Experiments showed that earthy-musty taste associated with TCA formation can easily occur in distribution systems and is linked mainly to fungi metabolism. By maintaining chlorine residual, a control of such tastes can be achieved. The masking effect of these earthy-musty tasters induced by TCA by chlorine is not very effective.
<p>Chlordecone (CLD; C<sub>10</sub>Cl<sub&gt... more <p>Chlordecone (CLD; C<sub>10</sub>Cl<sub>10</sub>O) is an organochlorine pesticide extensively used between 1960s and 1990s in the French West Indies (FWI). Its massive use led to soil and river pollution which prompted its ban in 1993. CLD has a bis-homocubane structure and various chlorine atoms making it highly recalcitrant in the environment. To date, several environmental compartments of the FWI continue facing the legacy of CLD pollution. This study aims at improving the monitoring of the degradation (or recalcitrance) extent of CLD in the soils of the FWI following in situ chemical reduction (ISCR). Multi-element compound-specific isotope analysis (ME-CSIA) was used to identify changes of stable isotopes of CLD (i.e., <sup>13</sup>C/<sup>12</sup>C and <sup>37</sup>Cl/<sup>35</sup>Cl) produced during distinct abiotic reductive transformation reactions. Reductive transformation of CLD was tested in abiotic microcosms in the presence of either zero-valent iron, ascorbic acid, vitamin B<sub>12,</sub> or persulfate activated by microwave irradiation. CLD transformation was evidenced by the detection of several hydrochlordecones (after losses of one or two chlorine atoms) under all conditions. Enrichment of the <sup>13</sup>C isotopes of CLD relative to <sup>12</sup>C revealed distinct signatures during transformation reactions of CLD to maximum Δδ<sup>13</sup>C of +7.2 ‰. A novel stable Cl isotope analysis was performed by liquid chromatography quadrupole time-of-flight mass spectrometry (LC-QToF-MS). Ongoing Cl isotope analysis may establish a multi-element assessment in which abiotic CLD degradation pathways may be distinguished based on stable C-Cl signatures. Altogether, our results may provide an improved strategy to elucidate CLD degradation in contaminated soils of the FWI.</p>
HAL (Le Centre pour la Communication Scientifique Directe), 2008
Noms des co-auteurs et organismes de rattachement Ce rapport fait la synthèse des travaux d'un co... more Noms des co-auteurs et organismes de rattachement Ce rapport fait la synthèse des travaux d'un consortium de 10 équipes de recherche rattachées à 9 laboratoires, 4 organismes de recherche et 3 universités. Les personnes ayant contribué de façon significative à ce travail et considérées comme co-auteur sont citées dans l'ordre de leur laboratoires. Laboratoires partenaires (ordre alphabétique) CEREGE : Laboratoire physico-chimie des interfaces, (UMR 6635 et IFR
The occurrence of tastes and odours (T&O) in potable water is considered one of the main problems... more The occurrence of tastes and odours (T&O) in potable water is considered one of the main problems by the drinking water companies. Thus, several treatment processes have been developed over the years to control T&O, including air stripping, activated carbon and oxidation using ozone. However, little information is available in the literature on the use of membranes for T&O removal. Therefore, the objective of this paper is to present potential of membrane processes for the removal of taste and odour-causing compounds. Several membranes were tested including ultrafiltration (UF), UF combined with powdered activated carbon (PAC), nanofiltration (NF) and low pressure reverse osmosis (LP RO) membranes. Combination of UF with PAC was found to be effective for T&O control. The use of NF or LP RO is still unclear in the objective of T&O control.
Uploads
Papers by Laure Malleret