Jerome Rose | Centre Européen de Recherche et d’Enseignement des Géosciences de l’Environnement (original) (raw)

Papers by Jerome Rose

Environmental Science Technology, Feb 1, 2011

Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer product... more Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer products and may have adverse impacts on organisms when they inadvertently enter ecosystems. This study investigated the uptake and toxicity of AgNPs to the common grass, Lolium multiflorum. We found that root and shoot Ag content increased with increasing AgNP exposures. AgNPs inhibited seedling growth. While exposed to 40 mg L -1 GA-coated AgNPs, seedlings failed to develop root hairs, had highly vacuolated and collapsed cortical cells and broken epidermis and rootcap. In contrast, seedlings exposed to identical concentrations of AgNO 3 or supernatants of ultracentrifuged AgNP solutions showed no such abnormalities. AgNP toxicity was influenced by total NP surface area with smaller AgNPs (6 nm) more strongly affecting growth than did similar concentrations of larger (25 nm) NPs for a given mass. Cysteine (which binds Ag þ ) mitigated the effects of AgNO 3 but did not reduce the toxicity of AgNP treatments. X-ray spectro-microscopy documented silver speciation within exposed roots and suggested that silver is oxidized within plant tissues. Collectively, this study suggests that growth inhibition and cell damage can be directly attributed either to the nanoparticles themselves or to the ability of AgNPs to deliver dissolved Ag to critical biotic receptors.

Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer product... more Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer products and may have adverse impacts on organisms when they inadvertently enter ecosystems. This study investigated the uptake and toxicity of AgNPs to the common grass, Lolium multiflorum. We found that root and shoot Ag content increased with increasing AgNP exposures. AgNPs inhibited seedling growth. While exposed to 40 mg L -1 GA-coated AgNPs, seedlings failed to develop root hairs, had highly vacuolated and collapsed cortical cells and broken epidermis and rootcap. In contrast, seedlings exposed to identical concentrations of AgNO 3 or supernatants of ultracentrifuged AgNP solutions showed no such abnormalities. AgNP toxicity was influenced by total NP surface area with smaller AgNPs (6 nm) more strongly affecting growth than did similar concentrations of larger (25 nm) NPs for a given mass. Cysteine (which binds Ag þ ) mitigated the effects of AgNO 3 but did not reduce the toxicity of AgNP treatments. X-ray spectro-microscopy documented silver speciation within exposed roots and suggested that silver is oxidized within plant tissues. Collectively, this study suggests that growth inhibition and cell damage can be directly attributed either to the nanoparticles themselves or to the ability of AgNPs to deliver dissolved Ag to critical biotic receptors.

Environmental Pollution, Jul 28, 2011

Mineral sunscreen nanocomposites, based on a nano-TiO 2 core, coated with aluminium hydroxide and... more Mineral sunscreen nanocomposites, based on a nano-TiO 2 core, coated with aluminium hydroxide and dimethicone films, were submitted to an artificial ageing process. The resulting Altered TiO 2 Nanocomposites (ATN) were then tested in the liquid phase on the plant model Vicia faba, which was exposed 48 h to three nominal concentrations: 5, 25 and 50 mg ATN/L. Plant growth, photosystem II maximum quantum yield, genotoxicity (micronucleus test) and phytochelatins levels showed no change compared to controls. Oxidative stress biomarkers remained unchanged in shoots while in roots, glutathione reductase activity decreased at 50 mg ATN/L and ascorbate peroxidase activity decreased for 5 and 25 mg ATN/L. Nevertheless, despite the weak response of biological endpoints, ICP-MS measurements revealed high Ti and Al concentrations in roots, and X-ray fluorescence micro-spectroscopy revealed titanium internalization in superficial root tissues. Eventual long-term effects on plants may occur.

Journal of Encapsulation and Adsorption Sciences, 2014

In this research, the natural bentonite clay (from Maghnia, western Algeria) was purified (Na +mo... more In this research, the natural bentonite clay (from Maghnia, western Algeria) was purified (Na +montmorillonite, CEC = 91 meq/100 g), noted (puri.bent) and modified with mixed hydroxy-Fe-Al (FeAl-PILC). The purified bentonite clay and FeAl-PILC were heated at 383 K for 2 hr and characterized by the chemical analyses data, XRD, and N 2 adsorption to 77 K techniques. Puri.bent and FeAl-PILC were applied to fix the organic matter (OM) present in urban wastewater from the city of Sidi Bel-Abbes (western Algeria). The adsorption of organic matter was followed by spectrophotometry at 470 nm, and the adsorption data were a good fit with Freundlich isotherm for puri.bent but for FeA-lPILC, were well fit by Elovitch isotherm model. The maximum adsorption capacity (q m ) was 571.6 mg/g for puri.bent and 1120.69 mg/g for FeAl-PLC. The degree of OM removal was 67% for puri.bent and 97% for FeAl-PILC. FeAl-PILC can be considered as a promising adsorbent for the removal of OM from wastewater.

Environmental science and pollution research international, Jan 25, 2015

Impacts of subsurface biogeochemical processes over time have always been a concern for the long-... more Impacts of subsurface biogeochemical processes over time have always been a concern for the long-term performance of zero valent iron (Fe(0))-based permeable reactive barriers (PRBs). To evaluate the biogeochemical impacts, laboratory experiments were performed using flow-through glass columns for 210 days at controlled temperature (20 °C). Two different particle sizes of Fe(0) were used in the columns, and to simulate indigenous microbial activity, extra carbon source was provided in the two columns (biotic columns) and the remaining two columns were kept abiotic using gamma radiations. Heavy metals (Zn, As) were removed efficiently in all the columns, and no exhaustion of treatment capability or clogging was observed during our experimental duration. Newly formed Fe mineral phases and precipitates were characterized using X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), and micro-XRF techniques in solid phase at the end of ...

Water Research, 2015

In many parts of the world, arsenic from geogenic and anthropogenic sources deteriorates the qual... more In many parts of the world, arsenic from geogenic and anthropogenic sources deteriorates the quality of drinking water resources. Effective methods of arsenic removal include adsorption and coagulation with iron- and aluminum-based materials, of which polyaluminum chloride is widely employed as coagulant in water treatment due to its low cost and high efficiency. We compared the arsenic uptake capacity and the arsenic bonding sites of different Al-based sorbents, including Al nanoclusters, polyaluminum chloride, polyaluminum granulate, and gibbsite. Extended X-ray absorption fine structure (EXAFS) spectroscopy revealed that As(V) forms bidentate-binuclear complexes in interaction with all Al-based removal agents. The octahedral configuration of nanoclusters and the distribution of sorption sites remain the same in all types of removal agents consisting of nano-scale Al oxyhydroxide particles. The obtained distances for As(V)-O and As(V)-Al agreed with previously published data and were found to be 1.69 ± 0.02 Å and 3.17-3.21 Å, respectively. Our study suggests that As(V) binds to Al nanoclusters as strongly as to Al oxide surfaces. The As sorption capacity of Al nanoclusters was found to be very similar to that of Al clusters in a polyaluminum chloride. The most efficient Al-based sorbents for arsenic removal were Al nanoclusters, followed by polyaluminum granulate.

The use of hazardous waste as fuel for the kilns in the cement industry leads to an enrichment of... more The use of hazardous waste as fuel for the kilns in the cement industry leads to an enrichment of the clinkers (cement) in heavy metals whose concentration can reach 2000 ppm [1]. To assess the environmental risks linked to the use of these materials, it is essential to study of the physico-chemical stability of these metals in hydrated hydraulic binders. Hydration of cements lead to the dissolution of the primary cement phases followed by the precipitation of new hydrated phases. Thus, the metals trapped in the anhydrous phases are also dissolved. Standard leaching tests performed on cements manufactured with hazardous waste have revealed low levels of soluble metals; however, the total metal release was dependent on cement and secondary hydrate phase composition [1]. Thus, to predict the long-term metal leaching behavior and associated environmental and human health risks associated with metal release, it is crucial to determine the crystallographic sites of the heavy metals in the clinker.

Colloids and Surfaces A Physicochemical and Engineering Aspects

Fe(III) Á/Si systems at various Si/Fe molar ratios and pH values were examined at the local and s... more Fe(III) Á/Si systems at various Si/Fe molar ratios and pH values were examined at the local and semi-local scale. The growth of Fe species is strongly dependent on the Si concentration: at Si/Fe B/1, the presence of edge and corner Fe Á/Fe linkages indicates a three dimensional growth regime, whereas for Si/Fe /1, the predominance of edge linkages corresponds to a two dimensional growth. Si Á/O Á/Fe and Si Á/O Á/Si bonds are formed simultaneously from the lowest pH and the lowest Si/Fe. At low pH, silica domains of approximately 2 nm are detected within the samples having the highest Si/Fe ratios. The polymerization level of Si strongly decreases at high pH, whereas Fe polymerization is only moderately sensitive to pH variations. The high fractal dimension of these amorphous phases indicates dense aggregation. The evolution of the fractal dimension with pH is correlated with modifications of the Fe speciation. #

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta

Toxicology Letters, 2015

During ITER operation, tritiated tungsten nanoparticles (W-NPs) will be generated. They could be ... more During ITER operation, tritiated tungsten nanoparticles (W-NPs) will be generated. They could be possibly released in the tokamak vicinity during a "Loss of Vacuum Accident" (LOVA). Accidental inhalation of such radioactive NPs could be harmful for ITER workers. Given the deficit of knowledge concerning their potential radiotoxicity, we evaluated W-NP toxicity on an innovative 3D in vitro cell model of the human airway epithelium grown on air-liquid-interface, MucilAir ® . This model is characterized by similar morphology and functions of the normal human airway epithelium and by mucus secretion and cilia beating. Epithelia were exposed to either W-NPs produced by planetary milling (50-100 nm), soluble tungsten (WO 4 ), or tungsten carbide cobalt alloy (WC-Co) positive control, for 24 h at 10; 20; 50 g/cm 2 . Due to the long shelf life of this model, NP cytotoxicity was studied immediately after treatment and in a kinetic mode up to 1 month after cell exposure to assess the reversibility of toxic effects. Acute and long-term toxicities were monitored by several endpoints: (1) epithelial tightness, (2) cellular metabolic activity, (3) pro-inflammatory response, (4) mucus secretion, and (5) morphological modifications. Transmission Electronic Microscopy (TEM) observations and ICP-MS measurements were performed to determine NP entry, behaviour and passage across the MucilAir ® model. After 24 h of W-treatment, TransEpithelial Electric Resistance and metabolic activity decreased and IL-8 apical secretion increased (coupled with mucus hyper-secretion). These results were more or less pronounced depending on the tungsten form. One week later, the effects were no longer observed for W-NP treatment but still observed for WO 4 and WC-Co. Different tungsten cellular distributions were found in function of the restoration period and tungsten form. More than 90% of W0 4 cross the epithelial barrier in 24 h whereas W-NPs continue to cross 1 week after treatment. In conclusion, our first results have shown that tungsten has limited and transient impacts on human pulmonary epithelium. The MucilAir ® model is a valuable tool for monitoring the W-translocation and the reversibility of its toxic effects. Tritiated W-NPs are currently being studied to evaluate the combined effects of chemical and radioactive stress.

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta

Environmental Science Technology, Feb 1, 2011

Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer product... more Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer products and may have adverse impacts on organisms when they inadvertently enter ecosystems. This study investigated the uptake and toxicity of AgNPs to the common grass, Lolium multiflorum. We found that root and shoot Ag content increased with increasing AgNP exposures. AgNPs inhibited seedling growth. While exposed to 40 mg L -1 GA-coated AgNPs, seedlings failed to develop root hairs, had highly vacuolated and collapsed cortical cells and broken epidermis and rootcap. In contrast, seedlings exposed to identical concentrations of AgNO 3 or supernatants of ultracentrifuged AgNP solutions showed no such abnormalities. AgNP toxicity was influenced by total NP surface area with smaller AgNPs (6 nm) more strongly affecting growth than did similar concentrations of larger (25 nm) NPs for a given mass. Cysteine (which binds Ag þ ) mitigated the effects of AgNO 3 but did not reduce the toxicity of AgNP treatments. X-ray spectro-microscopy documented silver speciation within exposed roots and suggested that silver is oxidized within plant tissues. Collectively, this study suggests that growth inhibition and cell damage can be directly attributed either to the nanoparticles themselves or to the ability of AgNPs to deliver dissolved Ag to critical biotic receptors.

Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer product... more Silver nanoparticles (AgNPs) are increasingly used as antimicrobial additives in consumer products and may have adverse impacts on organisms when they inadvertently enter ecosystems. This study investigated the uptake and toxicity of AgNPs to the common grass, Lolium multiflorum. We found that root and shoot Ag content increased with increasing AgNP exposures. AgNPs inhibited seedling growth. While exposed to 40 mg L -1 GA-coated AgNPs, seedlings failed to develop root hairs, had highly vacuolated and collapsed cortical cells and broken epidermis and rootcap. In contrast, seedlings exposed to identical concentrations of AgNO 3 or supernatants of ultracentrifuged AgNP solutions showed no such abnormalities. AgNP toxicity was influenced by total NP surface area with smaller AgNPs (6 nm) more strongly affecting growth than did similar concentrations of larger (25 nm) NPs for a given mass. Cysteine (which binds Ag þ ) mitigated the effects of AgNO 3 but did not reduce the toxicity of AgNP treatments. X-ray spectro-microscopy documented silver speciation within exposed roots and suggested that silver is oxidized within plant tissues. Collectively, this study suggests that growth inhibition and cell damage can be directly attributed either to the nanoparticles themselves or to the ability of AgNPs to deliver dissolved Ag to critical biotic receptors.

Environmental Pollution, Jul 28, 2011

Mineral sunscreen nanocomposites, based on a nano-TiO 2 core, coated with aluminium hydroxide and... more Mineral sunscreen nanocomposites, based on a nano-TiO 2 core, coated with aluminium hydroxide and dimethicone films, were submitted to an artificial ageing process. The resulting Altered TiO 2 Nanocomposites (ATN) were then tested in the liquid phase on the plant model Vicia faba, which was exposed 48 h to three nominal concentrations: 5, 25 and 50 mg ATN/L. Plant growth, photosystem II maximum quantum yield, genotoxicity (micronucleus test) and phytochelatins levels showed no change compared to controls. Oxidative stress biomarkers remained unchanged in shoots while in roots, glutathione reductase activity decreased at 50 mg ATN/L and ascorbate peroxidase activity decreased for 5 and 25 mg ATN/L. Nevertheless, despite the weak response of biological endpoints, ICP-MS measurements revealed high Ti and Al concentrations in roots, and X-ray fluorescence micro-spectroscopy revealed titanium internalization in superficial root tissues. Eventual long-term effects on plants may occur.

Journal of Encapsulation and Adsorption Sciences, 2014

In this research, the natural bentonite clay (from Maghnia, western Algeria) was purified (Na +mo... more In this research, the natural bentonite clay (from Maghnia, western Algeria) was purified (Na +montmorillonite, CEC = 91 meq/100 g), noted (puri.bent) and modified with mixed hydroxy-Fe-Al (FeAl-PILC). The purified bentonite clay and FeAl-PILC were heated at 383 K for 2 hr and characterized by the chemical analyses data, XRD, and N 2 adsorption to 77 K techniques. Puri.bent and FeAl-PILC were applied to fix the organic matter (OM) present in urban wastewater from the city of Sidi Bel-Abbes (western Algeria). The adsorption of organic matter was followed by spectrophotometry at 470 nm, and the adsorption data were a good fit with Freundlich isotherm for puri.bent but for FeA-lPILC, were well fit by Elovitch isotherm model. The maximum adsorption capacity (q m ) was 571.6 mg/g for puri.bent and 1120.69 mg/g for FeAl-PLC. The degree of OM removal was 67% for puri.bent and 97% for FeAl-PILC. FeAl-PILC can be considered as a promising adsorbent for the removal of OM from wastewater.

Environmental science and pollution research international, Jan 25, 2015

Impacts of subsurface biogeochemical processes over time have always been a concern for the long-... more Impacts of subsurface biogeochemical processes over time have always been a concern for the long-term performance of zero valent iron (Fe(0))-based permeable reactive barriers (PRBs). To evaluate the biogeochemical impacts, laboratory experiments were performed using flow-through glass columns for 210 days at controlled temperature (20 °C). Two different particle sizes of Fe(0) were used in the columns, and to simulate indigenous microbial activity, extra carbon source was provided in the two columns (biotic columns) and the remaining two columns were kept abiotic using gamma radiations. Heavy metals (Zn, As) were removed efficiently in all the columns, and no exhaustion of treatment capability or clogging was observed during our experimental duration. Newly formed Fe mineral phases and precipitates were characterized using X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), and micro-XRF techniques in solid phase at the end of ...

Water Research, 2015

In many parts of the world, arsenic from geogenic and anthropogenic sources deteriorates the qual... more In many parts of the world, arsenic from geogenic and anthropogenic sources deteriorates the quality of drinking water resources. Effective methods of arsenic removal include adsorption and coagulation with iron- and aluminum-based materials, of which polyaluminum chloride is widely employed as coagulant in water treatment due to its low cost and high efficiency. We compared the arsenic uptake capacity and the arsenic bonding sites of different Al-based sorbents, including Al nanoclusters, polyaluminum chloride, polyaluminum granulate, and gibbsite. Extended X-ray absorption fine structure (EXAFS) spectroscopy revealed that As(V) forms bidentate-binuclear complexes in interaction with all Al-based removal agents. The octahedral configuration of nanoclusters and the distribution of sorption sites remain the same in all types of removal agents consisting of nano-scale Al oxyhydroxide particles. The obtained distances for As(V)-O and As(V)-Al agreed with previously published data and were found to be 1.69 ± 0.02 Å and 3.17-3.21 Å, respectively. Our study suggests that As(V) binds to Al nanoclusters as strongly as to Al oxide surfaces. The As sorption capacity of Al nanoclusters was found to be very similar to that of Al clusters in a polyaluminum chloride. The most efficient Al-based sorbents for arsenic removal were Al nanoclusters, followed by polyaluminum granulate.

The use of hazardous waste as fuel for the kilns in the cement industry leads to an enrichment of... more The use of hazardous waste as fuel for the kilns in the cement industry leads to an enrichment of the clinkers (cement) in heavy metals whose concentration can reach 2000 ppm [1]. To assess the environmental risks linked to the use of these materials, it is essential to study of the physico-chemical stability of these metals in hydrated hydraulic binders. Hydration of cements lead to the dissolution of the primary cement phases followed by the precipitation of new hydrated phases. Thus, the metals trapped in the anhydrous phases are also dissolved. Standard leaching tests performed on cements manufactured with hazardous waste have revealed low levels of soluble metals; however, the total metal release was dependent on cement and secondary hydrate phase composition [1]. Thus, to predict the long-term metal leaching behavior and associated environmental and human health risks associated with metal release, it is crucial to determine the crystallographic sites of the heavy metals in the clinker.

Colloids and Surfaces A Physicochemical and Engineering Aspects

Fe(III) Á/Si systems at various Si/Fe molar ratios and pH values were examined at the local and s... more Fe(III) Á/Si systems at various Si/Fe molar ratios and pH values were examined at the local and semi-local scale. The growth of Fe species is strongly dependent on the Si concentration: at Si/Fe B/1, the presence of edge and corner Fe Á/Fe linkages indicates a three dimensional growth regime, whereas for Si/Fe /1, the predominance of edge linkages corresponds to a two dimensional growth. Si Á/O Á/Fe and Si Á/O Á/Si bonds are formed simultaneously from the lowest pH and the lowest Si/Fe. At low pH, silica domains of approximately 2 nm are detected within the samples having the highest Si/Fe ratios. The polymerization level of Si strongly decreases at high pH, whereas Fe polymerization is only moderately sensitive to pH variations. The high fractal dimension of these amorphous phases indicates dense aggregation. The evolution of the fractal dimension with pH is correlated with modifications of the Fe speciation. #

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta

Toxicology Letters, 2015

During ITER operation, tritiated tungsten nanoparticles (W-NPs) will be generated. They could be ... more During ITER operation, tritiated tungsten nanoparticles (W-NPs) will be generated. They could be possibly released in the tokamak vicinity during a "Loss of Vacuum Accident" (LOVA). Accidental inhalation of such radioactive NPs could be harmful for ITER workers. Given the deficit of knowledge concerning their potential radiotoxicity, we evaluated W-NP toxicity on an innovative 3D in vitro cell model of the human airway epithelium grown on air-liquid-interface, MucilAir ® . This model is characterized by similar morphology and functions of the normal human airway epithelium and by mucus secretion and cilia beating. Epithelia were exposed to either W-NPs produced by planetary milling (50-100 nm), soluble tungsten (WO 4 ), or tungsten carbide cobalt alloy (WC-Co) positive control, for 24 h at 10; 20; 50 g/cm 2 . Due to the long shelf life of this model, NP cytotoxicity was studied immediately after treatment and in a kinetic mode up to 1 month after cell exposure to assess the reversibility of toxic effects. Acute and long-term toxicities were monitored by several endpoints: (1) epithelial tightness, (2) cellular metabolic activity, (3) pro-inflammatory response, (4) mucus secretion, and (5) morphological modifications. Transmission Electronic Microscopy (TEM) observations and ICP-MS measurements were performed to determine NP entry, behaviour and passage across the MucilAir ® model. After 24 h of W-treatment, TransEpithelial Electric Resistance and metabolic activity decreased and IL-8 apical secretion increased (coupled with mucus hyper-secretion). These results were more or less pronounced depending on the tungsten form. One week later, the effects were no longer observed for W-NP treatment but still observed for WO 4 and WC-Co. Different tungsten cellular distributions were found in function of the restoration period and tungsten form. More than 90% of W0 4 cross the epithelial barrier in 24 h whereas W-NPs continue to cross 1 week after treatment. In conclusion, our first results have shown that tungsten has limited and transient impacts on human pulmonary epithelium. The MucilAir ® model is a valuable tool for monitoring the W-translocation and the reversibility of its toxic effects. Tritiated W-NPs are currently being studied to evaluate the combined effects of chemical and radioactive stress.

Geochmica et Cosmochimica Acta

Geochmica et Cosmochimica Acta