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Journal of Environmental Sciences 2016年第9期28卷 183-192页

作者： christophe waterlot aurélie pelfrêne francis douay Civil and geo-Environmental Engineering Laboratory (LGCgE) ISA Lille 48 boulevard Vauban 59046 Lille cedex France

An initial exploration was conducted using mathematical and statistical methods to obtain relevant information about the determination of the physicochemical parameters capable of controlling As uptake by ryegrass grown on contaminated *** of As in the soils were from 10 to 47 mg/kg,mainly in the As（V） form（57%–73%）.Concentrations of As in water extracts were very low（61–700 μg/kg）.It was suggested that As（Ⅲ） was mainly in the uncharged species and As（V） in the charged *** methods revealed that the values of the ratio As（Ⅲ）/As（V） depended on the assimilated-phosphorus,the pseudo-total and water-extractable Fe contents and the soil p *** concentrations measured in ryegrass shoots ranged from 119 to 1602 μg/*** linear correlations were obtained between As in ryegrass shoots and water *** transfer coefficient of As correlated well with the ratio assimilated-phosphorus/***（Ⅲ）uptake by the shoot of ryegrass was controlled by the organic matter and Fe-oxide contents.

关键词： Arsenic Speciation Water extracting solution Phytoavailability Ryegrass Contaminated urban soils

Chemical Availability of Cd, Pb and Zn in Anthropogenically Polluted Soil: Assessing the Geochemical Reactivity and Oral Bioaccessibility

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Pedosphere 2017年第3期27卷 616-629页

作者： christophe waterlot Francis DOUAY Aurélie PELFRENE Yncréa Hauts-de-France Laboratoire Génie Civil et géo Environnement (LGCgE)

The most recent in vitro tests used to determine metal bioaccessiblility are generally time-consuming and expensive. This study aimed at determining potential relationships between the concentrations of metals extracted using single-extraction methods and the concentrations of bioaccessible metals assessed by a harmonised in vitro test, the Unified BARGE Method （UBM）. A total number of 27 soil samples were collected from kitchen gardens and lawns with various physicochemical parameters and contamination levels. Significant relationships were obtained between Cd, Pb and Zn extracted in gastric and gastrointestinal phases and using single extractions. The best relationhips were established using acetic and citric acids for Cd, whereas for Pb, citric acid and ethylenedi- aminetetraacetic acid （EDTA） were identified as the best extractants. These relationships were improved by means of a linear multiple regression with a downward stepwise procedure involving agronomic parameters （soil cation exchange capacity and assimilated P）. This method highlighted the fact that the cation exchange capacity and P contents in soils were the two main parameters that controlled the human bioaccessibility of Cd, Pb and Zn in the gastric phase. Besides, the metal concentrations extracted with the acetic and citric acids correlated well with the metal concentrations in the gastric and gastrointestinal phases, suggesting that the bioaceessible metals were mainly in a soluble form, weakly bound to the organic matter and associated with the carbonates and the Fe and Mn oxides/hydroxides in soils.

关键词： gastric phase gastrointestinal phase linear multiple regression single extractant urban soil

Impact of a Phosphate Amendment on the Environmental Availability and Phytoavailability of Cd and Pb in Moderately and Highly Carbonated Kitchen Garden Soils

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Pedosphere 2017年第3期27卷 588-605页

作者： christophe waterlot Christelle PRUVOT Franck MAROT Francis DOUAY Yncréa Hauts-de-France Laboratoire Génie Civil et géo Environnement (LGCgE) Agence De l’Environnement et de la Matrise de l’Energie (ADEME) Direction Villes et Territoires Durables Services Friches Urbaines et Sites Pollués

The behaviour of metals mainly depends on soil p H, carbonate contents and contamination level, which should be considered for the management of contaminated soils. In this study, kitchen garden topsoils(0–25 cm) were sampled from the area around three smelters in France, with different Cd and Pb contamination levels. Effect of a phosphate amendment(a mixture of diammonium phosphate and hydroxyapatite) on the environmental availability and phytoavailability of Cd and Pb was evaluated by different chemical extractions and cultivating lettuce(Lactuca sativa L.), respectively. Changes in the distribution of Cd and Pb were found in most contaminated soils after phosphate amendment. An increase of Cd and Pb in the residual phase was highlighted in almost all carbonated contaminated soils, whereas a decrease of Pb in the exchangeable, water and acid-soluble phase was observed in most contaminated soils with the lowest carbonate contents. The concentrations of extractable Cd and Pb using calcium chloride and acetic and citric acids generally decreased after the soil amendment. Lettuces grown on amended soils were acceptable for human consumption as regard to Pb concentration. In contrast, some lettuces were unacceptable for human consumption, since the concentrations of Cd in the leaves were higher than the European legislation limit. Surprisingly, in carbonated soils with very low concentration of Cd, the Cd concentrations in lettuce reached up to the European legislation limit, making the lettuce unacceptable for human *** study highlighted the fact that the total metal concentration in soils does not always allow to predict the metal accumulation in the edible parts of vegetables in order to make a judgement about their acceptability or unacceptability for human consumption.

关键词： chemical amendment contamination immobilisation lettuce metal urban soil

Prediction of Extractable Cd,Pb and Zn in Contaminated Woody Habitat Soils Using a Change Point Detection Method

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Pedosphere 2016年第3期26卷 282-298页

作者： christophe waterlot Christelle PRUVOT Géraldine BIDAR Clémentine FRITSCH Annette DE VAUFLEURY Renaud SCHEIFLER Francis DOUAY Groupe ISA Laboratoire Genie Civil et geo-Environnement(LGCgE)Lille 59046(France) Departement Chrono-Environment UMR UFC/CNRS 6249 USC INRAUniversite Bourgogne Franche-ComteBesancon 25030(France)

Accumulation of heavy metals in soils poses a potential risk to plant production, which is related to availability of the metals in soil. The phytoavailability of metals is usually evaluated using extracting solutions such as salts, acids or chelates. The purpose of this study was to identify the most significant soil parameters that can be used to predict the concentrations of acetic and citric acidextractable cadmium(Cd), lead(Pb) and zinc(Zn) in contaminated woody habitat topsoils. Multiple linear regression models were established using two analysis strategies and three sets of variables based on a dataset of 260 soil samples. The performance of these models was evaluated using statistical parameters. Cation exchange capacity, CaCO_3, organic matter, assimilated P, free Al oxide,sand and the total metal concentrations appeared to be the main soil parameters governing the solubility of Cd, Pb and Zn in acetic and citric acid solutions. The results strongly suggest that the metal solubility in extracting solutions is extractable concentrationdependent since models were overall improved by incorporating a change point. This change point detection method was a powerful tool for predicting extractable Cd, Pb and Zn. Suitable predictions of extractable Cd, Pb and Zn concentrations were obtained, with correlation coefficient(adjusted r) ranging from 0.80 to 0.99, given the high complexity of the woody habitat soils studied. Therefore,the predictive models can constitute a decision-making support tool for managing phytoremediation of contaminated soils, making recommendations to control the potential bioavailability of metals. The relationships between acetic and/or citric acid-extractable concentrations and the concentrations of metals into the aboveground parts of plants need to be predicted, in order to make their temporal monitoring easier.

关键词： acetic acid citric acid contaminated soil extractability metals multiple linear regression model soil parameters

Copper-uptake mediated by an ecofriendly zwitterionic ionic liquid: A new challenge for a cleaner bioeconomy

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Journal of Environmental Sciences 2023年第8期130卷 92-101页

作者： Marie E.Vuillemin christophe waterlot Anthony Verdin Sylvain Laclef Christine Cézard David Lesur Catherine Sarazin Dominique Courcot Caroline Hadad Eric Husson Albert Nguyen Van Nhien Enzyme and Cell Engineering UMR 7025 CNRSUniversity of Picardie Jules Verne-Faculty of Sciences33 rue Saint Leu80039 Amiens CedexFrance University of Lille Mines-Télécom InstituteUniversity of ArtoisJUNIAULR 4515-LGCgELaboratory of Civil Engineering and Geo-EnvironmentF-59000 LilleFrance Environmental Chemistry and Life Interactions Unit UCEIV UR4492FR CNRS 3417University of Littoral Cote d’Opale(ULCO)DunkerqueFrance Laboratory of Glycochemistry Antimicrobials and AgroresourcesUMR CNRS 7378University of Picardie Jules Verne-Faculty of Sciences33 rue Saint Leu80039 Amiens CedexFrance Institute of Chemistry of Picardie FR CNRS 3085 80039 AmiensFrance

This study aims to investigate the ability of an imidazolium biobased Zwitterionic Ionic Liquids(ZILs)in enhancing the phytoavailability of copper from garden(G)and vineyard(V)soils using the model plant *** and artificially contaminated CuSO_(4) soils,unamended and ZIL-amended soil modalities were *** copper/ZIL molar ratio(1/4)introduced was rationally established based on molecular modeling and on the maximal copper concentration in artificially contaminated *** accumulation of copper in the shoots was detected for the uncontaminated and copper contaminated ZIL amended V soils(18.9 and 23.3 mg/kg,respectively)contrary to G soils together with a ZIL concentration of around 3%(W/W)detected by LC-MS *** data evidenced a Cu-accumulation improvement of 38%and 66%compared to non-amended V soils(13.6 and 13.9 mg/kg respectively).ZIL would be mainly present under Cu(II)-ZIL_(4) complexes in the *** impact on the chemical composition of shoot was also *** results show that depending on the soils modalitity,the presence of free copper and/or ZIL led to different chemical compositions in lignin and monomeric sugar *** the biorefinery context,performances of enzymatic hydrolysis of shoots were also related to the presence of both ZIL and copper under free or complex *** assessment of the vineyard soil samples indicated that the quantity of copper and ZIL remaining in the soils had no significant *** amendment in a copper-contaminated soil was demonstrated as being a promising way to promote the valorization of phytoremediation plants.

关键词： Cu-accumulation Biobased Zwitterionic Ionic Liquid (ZIL) Enzymatic hydrolysis Ecotoxicity