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Tadayon Y, Dutruch L, Vantelon D, Gigault J, Dia A, Pattier M, Davranche M. Are nano-colloids controlling rare earth elements mobility or is it the opposite? Insight from A4F-UV-QQQ-ICP-MS. CHEMOSPHERE 2024; 364:143164. [PMID: 39181466 DOI: 10.1016/j.chemosphere.2024.143164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 08/01/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
Rare earth element (REE) mobility in the environment is expected to be controlled by colloids. Recent research has detailed the structure of iron-organic colloids (Fe-OM colloids), which include both large colloids and smaller nano-colloids. To assess how these nano-colloids affect REE mobility, their interactions with REE and calcium (Ca) were investigated at pH 4 and 6. Using Asymmetric Flow Field Flow Fractionation (A4F) combined with UV and Triple Quadrupole Inductively Coupled Plasma Mass Spectrometry (QQQ-ICP-MS), Fe-OM nano-colloids were separated from bulk Fe-OM colloids and their REE and Ca content were analyzed. Without REE and Ca, nano-colloids had an average diameter of approximately 25 nm. Their structure is pH-dependent, with aggregation increasing as pH decreases. At high REE loadings (REE/Fe ≥ 0.05), REE induced a size increase of nano-colloids, regardless of pH. Heavy REE (HREE), with their high affinity for organic matter, formed strong complexes with Fe-OM colloids, resulting in large aggregates. In contrast, light REE (LREE), which bind less strongly to organic molecules, were associated with the smallest nano-colloids. Low REE loading did not cause noticeable fractionation. Calcium further enhanced the aggregation process at both pH levels by neutralizing the charges on nano-colloids. These findings indicate that REE can act as aggregating agent controlling their own mobility, and regulating colloid transfer.
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Affiliation(s)
- Yasaman Tadayon
- Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118, F-35000, Rennes, France.
| | - Lionel Dutruch
- Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118, F-35000, Rennes, France
| | - Delphine Vantelon
- Synchrotron SOLEIL, L'orme des Merisiers, Saint Aubin BP48, 91192, Gif sur Yvette Cedex, France
| | - Julien Gigault
- TAKUVIK CNRS/ULaval, UMI3376, Université Laval, Quebec City, QC, Canada
| | - Aline Dia
- Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118, F-35000, Rennes, France
| | - Maxime Pattier
- Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118, F-35000, Rennes, France
| | - Mélanie Davranche
- Univ. Rennes, CNRS, Géosciences Rennes, UMR 6118, F-35000, Rennes, France
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2
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Li L, Ran Y, Zhuang Y, Wang L, Chen J, Sun Y, Lu S, Ye F, Mei L, Ning Y, Dai F. Risk analysis of air pollutants and types of anemia: a UK Biobank prospective cohort study. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2024; 68:1343-1356. [PMID: 38607561 DOI: 10.1007/s00484-024-02670-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/01/2024] [Accepted: 04/01/2024] [Indexed: 04/13/2024]
Abstract
Previous studies have suggested that exposure to air pollutants may be associated with specific blood indicators or anemia in certain populations. However, there is insufficient epidemiological data and prospective evidence to evaluate the relationship between environmental air pollution and specific types of anemia. We conducted a large-scale prospective cohort study based on the UK Biobank. Annual average concentrations of NO2, PM2.5, PM2.5-10, and PM10 were obtained from the ESCAPE study using the Land Use Regression (LUR) model. The association between atmospheric pollutants and different types of anemia was investigated using the Cox proportional hazards model. Furthermore, restricted cubic splines were used to explore exposure-response relationships for positive associations, followed by stratification and effect modification analyses by gender and age. After adjusting for demographic characteristics, 3-4 of the four types of air pollution were significantly associated with an increased risk of iron deficiency, vitamin B12 deficiency and folate deficiency anemia, while there was no significant association with other defined types of anemia. After full adjustment, we estimated that the hazard ratios (HRs) of iron deficiency anemia associated with each 10 μg/m3 increase in NO2, PM2.5, and PM10 were 1.04 (95%CI: 1.02, 1.07), 2.00 (95%CI: 1.71, 2.33), and 1.10 (95%CI: 1.02, 1.20) respectively. The HRs of folate deficiency anemia with each 10 μg/m3 increase in NO2, PM2.5, PM2.5-10, and PM10 were 1.25 (95%CI: 1.12, 1.40), 4.61 (95%CI: 2.03, 10.47), 2.81 (95%CI: 1.11, 7.08), and 1.99 (95%CI: 1.25, 3.15) respectively. For vitamin B12 deficiency anemia, no significant association with atmospheric pollution was found. Additionally, we estimated almost linear exposure-response curves between air pollution and anemia, and interaction analyses suggested that gender and age did not modify the association between air pollution and anemia. Our research provided reliable evidence for the association between long-term exposure to PM10, PM2.5, PM2.5-10, NO2, and several types of anemia. NO2, PM2.5, and PM10 significantly increased the risk of iron deficiency anemia and folate deficiency anemia. Additionally, we found that the smaller the PM diameter, the higher the risk, and folate deficiency anemia was more susceptible to air pollution than iron deficiency anemia. No association was observed between the four types of air pollution and hemolytic anemia, aplastic anemia, and other types of anemia. Although the mechanisms are not well understood, we emphasize the need to limit the levels of PM and NO2 in the environment to reduce the potential impact of air pollution on folate and iron deficiency anemia.
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Affiliation(s)
- Laifu Li
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Yan Ran
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Yan Zhuang
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Lianli Wang
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Jiamiao Chen
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Yating Sun
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Shiwei Lu
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Fangchen Ye
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Lin Mei
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Yu Ning
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China
| | - Fei Dai
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.
- Shaanxi Province Key Laboratory of Gastrointestinal Motility Disorders, Xi'an, China.
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3
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Duval JFL, Maffei L, Delatour E, Zaffino M, Pagnout C. Kinetics of metal detection by luminescence-based whole-cell biosensors: connecting biosensor response to metal bioavailability, speciation and cell metabolism. Phys Chem Chem Phys 2023; 25:30276-30295. [PMID: 37930226 DOI: 10.1039/d3cp04653b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Luminescent whole-cell metal biosensors are genetically engineered cells used for the detection of metals in e.g. aqueous solutions. Herein, we detail the quantitative connections between time-response of luminescent bacterial metal sensors and the bioavailability of free and complexed metal species. To that end, we formulate the biophysicochemical dynamics of metal partitioning at a biosensor/solution interface and integrate the required metabolism contribution to cell response. The formalism explains the ways in which cell signal depends on: coupled Eigen kinetics of metal complexation and diffusion of metal species to/from the interface; kinetics of metal excretion, Michaelis-Menten bioaccumulation and ensuing metal depletion from bulk solution; and kinetics of bioluminescence production following intracellular metal sequestration by regulatory metalloproteins. In turn, an expression is derived for the time-dependent cell signal as a function of interrelated (bioavai)lability of metal species and (thermo)dynamic descriptors of extra/intracellular metal complexation. Quantitative criteria are elaborated to identify scenarios where equilibrium modeling of metal speciation is incorrect, bulk metal depletion is operative, metal biouptake kinetics is governed by metal diffusion, or labile metal complexes fully contribute to cell response. Remarkably, in agreement with experiments, the theory predicts time-shifts of bioluminescence peaks with increasing concentration of biosensor and/or metal ligand in solution. We show that these shifts originate from the crosstalk between activation kinetics of cell photoactivity and speciation-dependent kinetics of bulk metal depletion. Overall, the work paves the way for the elaboration of new strategies to exploit the bioluminescence response of metal lux-biosensors at a dynamic level and evaluate metal bioavailability properties in environmental or biological aqueous samples.
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Affiliation(s)
| | - Lorenzo Maffei
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Eva Delatour
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Marie Zaffino
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
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4
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Rotureau E, Pinheiro JP, Duval JF. On the evaluation of the intrinsic stability of indium-nanoparticulate organic matter complexes. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128859] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Ghio AJ, Pavlisko EN, Roggli VL, Todd NW, Sangani RG. Cigarette Smoke Particle-Induced Lung Injury and Iron Homeostasis. Int J Chron Obstruct Pulmon Dis 2022; 17:117-140. [PMID: 35046648 PMCID: PMC8763205 DOI: 10.2147/copd.s337354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/06/2021] [Indexed: 11/23/2022] Open
Abstract
It is proposed that the mechanistic basis for non-neoplastic lung injury with cigarette smoking is a disruption of iron homeostasis in cells after exposure to cigarette smoke particle (CSP). Following the complexation and sequestration of intracellular iron by CSP, the host response (eg, inflammation, mucus production, and fibrosis) attempts to reverse a functional metal deficiency. Clinical manifestations of this response can present as respiratory bronchiolitis, desquamative interstitial pneumonitis, pulmonary Langerhans’ cell histiocytosis, asthma, pulmonary hypertension, chronic bronchitis, and pulmonary fibrosis. If the response is unsuccessful, the functional deficiency of iron progresses to irreversible cell death evident in emphysema and bronchiectasis. The subsequent clinical and pathological presentation is a continuum of lung injuries, which overlap and coexist with one another. Designating these non-neoplastic lung injuries after smoking as distinct disease processes fails to recognize shared relationships to each other and ultimately to CSP, as well as the common mechanistic pathway (ie, disruption of iron homeostasis).
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Affiliation(s)
- Andrew J Ghio
- Human Studies Facility, US Environmental Protection Agency, Chapel Hill, NC, 27514, USA
- Correspondence: Andrew J Ghio Human Studies Facility, US Environmental Protection Agency, 104 Mason Farm Road, Chapel Hill, NC, USA Email
| | | | | | - Nevins W Todd
- Department of Medicine, University of Maryland, Baltimore, MD, 21201, USA
| | - Rahul G Sangani
- Department of Medicine, West Virginia University, Morgantown, WV, USA
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6
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Ghio AJ, Gonzalez DH, Paulson SE, Soukup JM, Dailey LA, Madden MC, Mahler B, Elmore SA, Schladweiler MC, Kodavanti UP. Ozone Reacts With Carbon Black to Produce a Fulvic Acid-Like Substance and Increase an Inflammatory Effect. Toxicol Pathol 2020; 48:887-898. [PMID: 32975498 DOI: 10.1177/0192623320961017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Exposure to ambient ozone has been associated with increased human mortality. Ozone exposure can introduce oxygen-containing functional groups in particulate matter (PM) effecting a greater capacity of the particle for metal complexation and inflammatory effect. We tested the postulate that (1) a fulvic acid-like substance can be produced through a reaction of a carbonaceous particle with high concentrations of ozone and (2) such a fulvic acid-like substance included in the PM can initiate inflammatory effects following exposure of respiratory epithelial (BEAS-2B) cells and an animal model (male Wistar Kyoto rats). Carbon black (CB) was exposed for 72 hours to either filtered air (CB-Air) or approximately 100 ppm ozone (CB-O3). Carbon black exposure to high levels of ozone produced water-soluble, fluorescent organic material. Iron import by BEAS-2B cells at 4 and 24 hours was not induced by incubations with CB-Air but was increased following coexposures of CB-O3 with ferric ammonium citrate. In contrast to CB-Air, exposure of BEAS-2B cells and rats to CB-O3 for 24 hours increased expression of pro-inflammatory cytokines and lung injury, respectively. It is concluded that inflammatory effects of carbonaceous particles on cells can potentially result from (1) an inclusion of a fulvic acid-like substance after reaction with ozone and (2) changes in iron homeostasis following such exposure.
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Affiliation(s)
- Andrew J Ghio
- 138030US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - David H Gonzalez
- Atmospheric and Oceanic Sciences, 8783University of California at Los Angeles, Los Angeles, CA, USA
| | - Suzanne E Paulson
- Atmospheric and Oceanic Sciences, 8783University of California at Los Angeles, Los Angeles, CA, USA
| | - Joleen M Soukup
- 138030US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Lisa A Dailey
- 138030US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Michael C Madden
- 138030US Environmental Protection Agency, Research Triangle Park, NC, USA
| | - Beth Mahler
- Experimental Pathology Laboratories, Inc., Research Triangle Park, NC, USA
| | - Susan A Elmore
- National Toxicology Program, 6857National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA
| | | | - Urmila P Kodavanti
- 138030US Environmental Protection Agency, Research Triangle Park, NC, USA
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7
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Koopal L, Tan W, Avena M. Equilibrium mono- and multicomponent adsorption models: From homogeneous ideal to heterogeneous non-ideal binding. Adv Colloid Interface Sci 2020; 280:102138. [PMID: 32387754 DOI: 10.1016/j.cis.2020.102138] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/30/2020] [Accepted: 03/04/2020] [Indexed: 01/19/2023]
Abstract
Aqueous sorption processes play an important role in, for example, pollutant binding to natural nanoparticles, colloid stability, separation and enrichment of components and remediation processes. In this article, which is a tribute to Hans Lyklema, models of localized (ad)sorption of molecules and ions from aqueous solution on homogeneous and heterogeneous nanoparticles are presented. The discussed models range from ideal monocomponent sorption on homogeneous (Langmuir) and heterogeneous sites, to multicomponent ideal sorption on homogeneous and heterogeneous sites, multicomponent multisite ion complexation with charge distribution (CD-MUSIC) and non-ideal competitive adsorption on heterogeneous sites (NICA). Attention is also paid to lateral interaction, site-induced aggregation, binding stoichiometry and multilayer formation. Electrical double layer models are discussed in relation to ion binding on impermeable and permeable nanoparticles. Insight in models that can describe sorption of molecules and ions on nanoparticles leads to awareness of the limitations of using simple models for complex systems and is needed for the selection and application of an appropriate model for a given system. This is relevant for all practical sorption processes and for a better understanding of the role of natural nanoparticles in the binding of nutrients and pollutants.
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Affiliation(s)
- Luuk Koopal
- Physical Chemistry and Soft Matter, Wageningen University and Research, Wageningen, the Netherlands; College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Wenfeng Tan
- College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Marcelo Avena
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina.
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8
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Ghio AJ, Soukup JM, Dailey LA, Madden MC. Air pollutants disrupt iron homeostasis to impact oxidant generation, biological effects, and tissue injury. Free Radic Biol Med 2020; 151:38-55. [PMID: 32092410 PMCID: PMC8274387 DOI: 10.1016/j.freeradbiomed.2020.02.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/27/2020] [Accepted: 02/10/2020] [Indexed: 02/07/2023]
Abstract
Air pollutants cause changes in iron homeostasis through: 1) a capacity of the pollutant, or a metabolite(s), to complex/chelate iron from pivotal sites in the cell or 2) an ability of the pollutant to displace iron from pivotal sites in the cell. Through either pathway of disruption in iron homeostasis, metal previously employed in essential cell processes is sequestered after air pollutant exposure. An absolute or functional cell iron deficiency results. If enough iron is lost or is otherwise not available within the cell, cell death ensues. However, prior to death, exposed cells will attempt to reverse the loss of requisite metal. This response of the cell includes increased expression of metal importers (e.g. divalent metal transporter 1). Oxidant generation after exposure to air pollutants includes superoxide production which functions in ferrireduction necessary for cell iron import. Activation of kinases and phosphatases and transcription factors and increased release of pro-inflammatory mediators also result from a cell iron deficiency, absolute or functional, after exposure to air pollutants. Finally, air pollutant exposure culminates in the development of inflammation and fibrosis which is a tissue response to the iron deficiency challenging cell survival. Following the response of increased expression of importers and ferrireduction, activation of kinases and phosphatases and transcription factors, release of pro-inflammatory mediators, and inflammation and fibrosis, cell iron is altered, and a new metal homeostasis is established. This new metal homeostasis includes increased total iron concentrations in cells with metal now at levels sufficient to meet requirements for continued function.
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Affiliation(s)
- Andrew J Ghio
- From the National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill, NC, USA.
| | - Joleen M Soukup
- From the National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill, NC, USA
| | - Lisa A Dailey
- From the National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill, NC, USA
| | - Michael C Madden
- From the National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hill, NC, USA
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9
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Gonzalez DH, Soukup JM, Madden MC, Hays M, Berntsen J, Paulson SE, Ghio AJ. A Fulvic Acid-like Substance Participates in the Pro-inflammatory Effects of Cigarette Smoke and Wood Smoke Particles. Chem Res Toxicol 2020; 33:999-1009. [PMID: 32191033 PMCID: PMC8274388 DOI: 10.1021/acs.chemrestox.0c00036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We tested the postulates that (1) a fulvic acid (FA)-like substance is included in cigarette smoke and wood smoke particles (WSP) and (2) cell exposure to this substance results in a disruption of iron homeostasis, associated with a deficiency of the metal and an inflammatory response. The fluorescence excitation-emission matrix spectra of the water-soluble components of cigarette smoke condensate and WSP (Cig-WS and Wood-WS) approximated those for the standard reference materials, Suwanee River and Nordic fulvic acids (SRFA and NFA). Fourier transform infrared spectra for the FA fraction of cigarette smoke and WSP (Cig-FA and Wood-FA), SRFA, and NFA also revealed significant similarities (O-H bond in alcohols, phenols, and carboxylates, C═O in ketones, aldehydes, and carboxylates, and a significant carboxylate content). After exposure to Cig-WS and Wood-WS and the FA standards, iron was imported by respiratory epithelial cells, reflecting a functional iron deficiency. The release of pro-inflammatory mediators interleukin (IL)-8 and IL-6 by respiratory epithelial cells also increased following exposures to Cig-WS, Wood-WS, SRFA, and NFA. Co-exposure of the respiratory epithelial cells with iron decreased supernatant concentrations of the ILs relative to exposures to Cig-WS, Wood-WS, SRFA, and NFA alone. It is concluded that (1) a FA-like substance is included in cigarette smoke and WSP and (2) respiratory epithelial cell exposure to this substance results in a disruption of iron homeostasis associated with both a cell deficiency of the metal and an inflammatory response.
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Affiliation(s)
- David H Gonzalez
- Atmospheric and Oceanic Sciences, University of California, Los Angeles, California 90095, United States
| | - Joleen M Soukup
- U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Michael C Madden
- U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Michael Hays
- U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
| | - Jon Berntsen
- TRC Environmental, Chapel Hill, North Carolina 27599, United States
| | - Suzanne E Paulson
- Atmospheric and Oceanic Sciences, University of California, Los Angeles, California 90095, United States
| | - Andrew J Ghio
- U.S. Environmental Protection Agency, Research Triangle Park, North Carolina 27711, United States
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10
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Stripping chronopotentiometry at scanned deposition potential (SSCP): An effective methodology for dynamic speciation analysis of nanoparticulate metal complexes. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113530] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Town RM, van Leeuwen HP, Duval JFL. Rigorous Physicochemical Framework for Metal Ion Binding by Aqueous Nanoparticulate Humic Substances: Implications for Speciation Modeling by the NICA-Donnan and WHAM Codes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:8516-8532. [PMID: 31291104 DOI: 10.1021/acs.est.9b00624] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Latest knowledge on the reactivity of charged nanoparticulate complexants toward aqueous metal ions is discussed in mechanistic detail. We present a rigorous generic description of electrostatic and chemical contributions to metal ion binding by nanoparticulate complexants, and their dependence on particle size, particle type (i.e., reactive sites distributed within the particle body or confined to the surface), ionic strength of the aqueous medium, and the nature of the metal ion. For the example case of soft environmental particles such as fulvic and humic acids, practical strategies are delineated for determining intraparticulate metal ion speciation, and for evaluating intrinsic chemical binding affinities and heterogeneity. The results are compared with those obtained by popular codes for equilibrium speciation modeling (namely NICA-Donnan and WHAM). Physicochemical analysis of the discrepancies generated by these codes reveals the a priori hypotheses adopted therein and the inappropriateness of some of their key parameters. The significance of the characteristic time scales governing the formation and dissociation rates of metal-nanoparticle complexes in defining the relaxation properties and the complete equilibration of the metal-nanoparticulate complex dispersion is described. The dynamic features of nanoparticulate complexes are also discussed in the context of predictions of the labilities and bioavailabilities of the metal species.
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Affiliation(s)
- Raewyn M Town
- Systemic Physiological and Ecotoxicological Research (SPHERE), Department of Biology , University of Antwerp , Groenenborgerlaan 171 , 2020 Antwerp , Belgium
- Physical Chemistry and Soft Matter , Wageningen University & Research , Stippeneng 4 , 6708 WE Wageningen , The Netherlands
| | - Herman P van Leeuwen
- Physical Chemistry and Soft Matter , Wageningen University & Research , Stippeneng 4 , 6708 WE Wageningen , The Netherlands
| | - Jérôme F L Duval
- CNRS - Université de Lorraine , Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), UMR 7360 CNRS , 15 avenue du Charmois , 54500 Vandoeuvre-les-Nancy , France
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12
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Wang P, Ding Y, Liu M, Liang Y, Shi Z. Modeling kinetics of Ni dissociation from humic substances based on WHAM 7. CHEMOSPHERE 2019; 221:254-262. [PMID: 30640008 DOI: 10.1016/j.chemosphere.2019.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 12/25/2018] [Accepted: 01/02/2019] [Indexed: 06/09/2023]
Abstract
Understanding the kinetics of Ni dissociation from dissolved organic matter (DOM) helps to better predict the fate and bioavailability of Ni ions in the environment. However, there is still a lack of predictive models for the kinetics of Ni dissociation from DOM under different reaction conditions. In this study, kinetics of Ni dissociation from humic acids (HA) and fulvic acids (FA), two most important components in DOM for Ni binding, was studied with a competing ligand exchange method at varying Ni concentrations, reaction pH, and ionic strength. The kinetic data were analyzed using a mechanistic kinetics model developed based on the Windermere Humic Aqueous Model (WHAM). Experimental results showed that Ni dissociation rates were affected by both Ni concentrations and pH, and Ni dissociation from FA had faster rates than that from HA. The kinetics model can reproduce the experimental data well, with only two model fitting parameters for different reaction conditions. The modeling results showed that various HA and FA binding sites played different roles in controlling Ni dissociation rates, with bidentate binding sites and the weak tridentate sites being the most significant. At high pH values the Ni re-association reactions were significant for controlling the overall rates of Ni dissociation but had minimal impact at lower pH values. Our model provided a modeling framework based on WHAM 7 for predicting Ni dissociation rates when humic substances were the dominant binding ligands.
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Affiliation(s)
- Pei Wang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Yang Ding
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Minqin Liu
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Yuzhen Liang
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China
| | - Zhenqing Shi
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510006, PR China.
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13
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Ghio AJ, Soukup JM, Madden MC. The toxicology of air pollution predicts its epidemiology. Inhal Toxicol 2018; 30:327-334. [PMID: 30516398 DOI: 10.1080/08958378.2018.1530316] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The epidemiologic investigation has successively delineated associations of air pollution exposure with non-malignant and malignant lung disease, cardiovascular disease, cerebrovascular disease, pregnancy outcomes, perinatal effects and other extra-pulmonary disease including diabetes. Defining these relationships between air pollution exposure and human health closely parallels results of an earlier epidemiologic investigation into cigarette smoking and environmental tobacco smoke (ETS), two other particle-related exposures. Humic-like substances (HULIS) have been identified as a chemical component common to cigarette smoke and air pollution particles. Toxicology studies provide evidence that a disruption of iron homeostasis with sequestration of host metal by HULIS is a fundamental mechanistic pathway through which biological effects are initiated by cigarette smoke and air pollution particles. As a result of a common chemical component and a shared mechanistic pathway, it should be possible to extrapolate from the epidemiology of cigarette smoking and ETS to predict associations of air pollution exposure with human disease, which are currently unrecognized. Accordingly, it is anticipated that the forthcoming epidemiologic investigation will demonstrate relationships of air pollution with COPD causation, peripheral vascular disease, hypertension, renal disease, digestive disease, loss of bone mass/risk of fractures, dental disease, eye disease, fertility problems, and extrapulmonary malignancies.
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Affiliation(s)
- Andrew J Ghio
- a The National Health and Environmental Effects Research Laboratory , Environmental Protection Agency , Chapel Hill , NC , USA
| | - Joleen M Soukup
- a The National Health and Environmental Effects Research Laboratory , Environmental Protection Agency , Chapel Hill , NC , USA
| | - Michael C Madden
- a The National Health and Environmental Effects Research Laboratory , Environmental Protection Agency , Chapel Hill , NC , USA
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14
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Town RM, Duval JFL, van Leeuwen HP. The Intrinsic Stability of Metal Ion Complexes with Nanoparticulate Fulvic Acids. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:11682-11690. [PMID: 30226375 DOI: 10.1021/acs.est.8b02896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The electrostatic contributions to metal ion binding by fulvic acids (FAs) are characterized in light of recent theoretical developments on description of the net charge density of soft nanoparticles. Under practical electrolyte concentrations, the radius of the small, highly charged soft nanoparticulate FAs is comparable to the electrostatic screening length and their electric potential profile has a bell shape that extends into the surrounding aqueous medium. Consequently, accumulation of counterions in the extraparticulate zone can be significant. By comparison of experimentally derived Boltzmann partitioning coefficients with those computed on the basis of (i) the structural FA particle charge and (ii) the potential profile for a nanoparticulate FA entity equilibrated with indifferent electrolyte, we identify the thickness of the extraparticulate counter charge accumulation shell in 1-1 and 2-1 electrolytes. The results point to the involvement of counterion condensation phenomena and call into question the approaches for modeling electrostatic contributions to ion binding that are invoked by popular equilibrium speciation codes. Overall, the electrostatic contributions to Cdaq2+ and Cuaq2+ association with FA are weaker than those previously found for much larger humic acids (HA). The intrinsic chemical binding strength of CdFA is comparable to that of CdHA, whereas CuFA complexes are weaker than CuHA ones.
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Affiliation(s)
- Raewyn M Town
- Systemic Physiological and Ecotoxicological Research (SPHERE), Department of Biology , University of Antwerp , Groenenborgerlaan 171 , 2020 Antwerp , Belgium
- Physical Chemistry and Soft Matter , Wageningen University & Research , Stippeneng 4 , 6708 WE Wageningen , The Netherlands
| | - Jérôme F L Duval
- CNRS , Laboratoire Interdisciplinaire des Environnements Continenteaux (LIEC) , UMR 7360, Vandoeuvre-lès-Nancy , F-54501 Nancy , France
- Université de Lorraine , LIEC, UMR 7360, Vandoeuvre-lès-Nancy , F-54501 Nancy , France
| | - Herman P van Leeuwen
- Physical Chemistry and Soft Matter , Wageningen University & Research , Stippeneng 4 , 6708 WE Wageningen , The Netherlands
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15
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Ghio AJ, Soukup JM, McGee J, Madden MC, Esther CR. Iron concentration in exhaled breath condensate decreases in ever-smokers and COPD patients. J Breath Res 2018; 12:046009. [PMID: 30079894 DOI: 10.1088/1752-7163/aad825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Investigation employing bronchoalveolar lavage supports both increased and decreased iron concentrations in the epithelial lining fluid (ELF) of smokers. Exhaled breath condensate (EBC) is an alternative approach to sampling the ELF. We evaluated for an association between iron homeostasis and both smoking and a diagnosis of chronic obstructive pulmonary disease (COPD) by measuring metal concentrations in EBC samples from non-smoker controls, smoker controls, and individuals diagnosed with COPD. The total number of EBC specimens was 194. EBC iron and zinc concentrations (mean ± standard error) in the total study population were 0.610 ± 0.025 and 40.73 ± 1.79 ppb respectively. In linear regressions, total cigarette smoking in pack years showed a significant (negative) relationship with EBC iron concentration but not with EBC zinc concentration. Iron concentrations in EBC from GOLD stage II, III, and IV patients were all significantly decreased relative to those from non-smoker and smoker controls. In contrast to iron, zinc concentrations in EBC were not significantly different than those from non-smoker and smoker controls. It is concluded that smoking decreases EBC iron concentrations and patients diagnosed with COPD have significantly lower EBC iron concentrations. These results likely reflect an increased burden of cigarette smoke particles in the lower respiratory tract of ever-smokers and patients with COPD and the capacity of components in this particle to complex iron.
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Affiliation(s)
- Andrew J Ghio
- National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Chapel Hil, NC 27514, United States of America
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16
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Ghio AJ, Madden MC. Human lung injury following exposure to humic substances and humic-like substances. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2018; 40:571-581. [PMID: 28766124 PMCID: PMC8968324 DOI: 10.1007/s10653-017-0008-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 07/24/2017] [Indexed: 05/13/2023]
Abstract
Among the myriad particles the human respiratory tract is exposed to, a significant number are distinctive in that they include humic substances (HS) and humic-like substances (HULIS) as organic components. HS are heterogeneous, amorphous, organic materials which are ubiquitous occurring in all terrestrial and aqueous environments. HULIS are a complex class of organic, macromolecular compounds initially extracted from atmospheric aerosol particles which share some features with HS including an aromatic, polyacidic nature. As a result of having a variety of oxygen-containing functional groups, both HS and HULIS complex metal cations, especially iron. Following particle uptake by cells resident in the lung, host iron will be sequestered by HS- and HULIS-containing particles initiating pathways of inflammation and subsequent fibrosis. It is proposed that (1) human exposures to HS and HULIS of respirable size (<10 µm diameter) are associated with inflammatory and fibrotic lung disease and (2) following retention of particles which include HS and HULIS, the mechanism of cell and tissue injury involves complexation of host iron. Human inflammatory and fibrotic lung injuries following HS and HULIS exposures may include coal workers' pneumoconiosis, sarcoidosis, and idiopathic pulmonary fibrosis as well as diseases associated with cigarette smoking and exposures to emission and ambient air pollution particles.
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Affiliation(s)
- Andrew J Ghio
- National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Research Triangle Park, NC, USA.
- Human Studies Facility, 104 Mason Farm Road, Chapel Hill, NC, 27599-7315, USA.
| | - Michael C Madden
- National Health and Environmental Effects Research Laboratory, Environmental Protection Agency, Research Triangle Park, NC, USA
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17
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Duval JFL. Chemodynamics of metal ion complexation by charged nanoparticles: a dimensionless rationale for soft, core–shell and hard particle types. Phys Chem Chem Phys 2017; 19:11802-11815. [DOI: 10.1039/c7cp01750b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study clarifies the contributions of nanoparticle properties and aqueous metal ion dehydration kinetics to chemodynamics of nanoparticulate metal complexes.
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Affiliation(s)
- Jérôme F. L. Duval
- CNRS
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC)
- UMR 7360
- Vandoeuvre-lès-Nancy F-54501
- France
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18
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Rotureau E, Waldvogel Y, Pinheiro JP, Farinha JPS, Bihannic I, Présent RM, Duval JFL. Structural effects of soft nanoparticulate ligands on trace metal complexation thermodynamics. Phys Chem Chem Phys 2016; 18:31711-31724. [PMID: 27841406 DOI: 10.1039/c6cp06880d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Metal binding to natural soft colloids is difficult to address due to the inherent heterogeneity of their reactive polyelectrolytic volume and the modifications of their shell structure following changes in e.g. solution pH, salinity or temperature. In this work, we investigate the impacts of temperature- and salinity-mediated modifications of the shell structure of polymeric ligand nanoparticles on the thermodynamics of divalent metal ions Cd(ii)-complexation. The adopted particles consist of a glassy core decorated by a fine-tunable poly(N-isopropylacrylamide) anionic corona. According to synthesis, the charges originating from the metal binding carboxylic moieties supported by the corona chains are located preferentially either in the vicinity of the core or at the outer shell periphery (p(MA-N) and p(N-AA) particles, respectively). Stability constants (KML) of cadmium-nanoparticle complexes are measured under different temperature and salinity conditions using electroanalytical techniques. The obtained KML is clearly impacted by the location of the carboxylic functional groups within the shell as p(MA-N) leads to stronger nanoparticulate Cd complexes than p(N-AA). The dependence of KML on solution salinity for p(N-AA) is shown to be consistent with a binding of Cd to peripheral carboxylic groups driven by Coulombic interactions (Eigen-Fuoss mechanism for ions-pairing) or with particle electrostatic features operating at the edge of the shell Donnan volume. For p(MA-N) particulate ligands, a scenario where metal binding occurs within the intraparticulate Donnan phase correctly reproduces the experimental findings. Careful analysis of electroanalytical data further evidences that complexation of metal ions by core-shell particles significantly differ according to the location and distribution of the metal-binding sites throughout the reactive shell. This complexation heterogeneity is basically enhanced with increasing temperature i.e. upon significant increase of particle shell shrinking, which suggests that the contraction of the reactive phase volume of the particulate ligands promotes cooperative metal binding effects.
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Affiliation(s)
- Elise Rotureau
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
| | - Yves Waldvogel
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
| | - José P Pinheiro
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
| | - José Paulo S Farinha
- Centro de Quimica Fisica Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Tecnico, University of Lisbon, 1049-001 Lisboa, Portugal
| | - Isabelle Bihannic
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
| | - Romain M Présent
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
| | - Jérôme F L Duval
- CNRS, LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), UMR 7360, Vandoeuvre-lès-Nancy F-54501, France and Université de Lorraine, LIEC, UMR 7360, Vandoeuvre-lès-Nancy F-54501, France.
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19
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Town RM, van Leeuwen HP. Intraparticulate Metal Speciation Analysis of Soft Complexing Nanoparticles. The Intrinsic Chemical Heterogeneity of Metal–Humic Acid Complexes. J Phys Chem A 2016; 120:8637-8644. [DOI: 10.1021/acs.jpca.6b08543] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Raewyn M. Town
- Department
of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense, Denmark
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
- Systemic Physiological and Ecotoxicological
Research (SPHERE), Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Herman P. van Leeuwen
- Physical Chemistry and Soft Matter, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
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20
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Shi Z, Wang P, Peng L, Lin Z, Dang Z. Kinetics of Heavy Metal Dissociation from Natural Organic Matter: Roles of the Carboxylic and Phenolic Sites. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:10476-10484. [PMID: 27580051 DOI: 10.1021/acs.est.6b01809] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We developed a unifying model for the kinetics of heavy metal dissociation from natural organic matter (NOM) in this study. The kinetics model, integrated with the equilibrium model WHAM 7, specifically considered metal ion reactions with various NOM sites formed by the carboxylic and phenolic sites. The association and dissociation rate coefficients for metal reactions with various NOM sites were constrained by WHAM predicted equilibrium distribution coefficients at specific reaction conditions. We developed the relationship for the dissociation rate coefficients among different binding sites for each metal, which was internally constrained by the metal binding constants. The model had only one fitting parameter, the dissociation rate coefficient for the metal complexes formed with two weak carboxylic sites, and all other parameters were derived from WHAM 7. The kinetic data for metal dissociation from NOM were collected from the literature, and the model was able to reproduce most of relevant data analyzed. The bidentate complexes appeared to be the predominated species controlling metal dissociation under most environmental conditions. The model can help to predict the reactivity and bioavailability of heavy metals under the impact of multiple competing ligands including NOM.
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Affiliation(s)
- Zhenqing Shi
- School of Environment and Energy, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
| | - Pei Wang
- School of Environment and Energy, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
| | - Lanfang Peng
- School of Environment and Energy, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
| | - Zhang Lin
- School of Environment and Energy, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology , Guangzhou, Guangdong 510006, People's Republic of China
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21
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Lability of nanoparticulate metal complexes in electrochemical speciation analysis. J Solid State Electrochem 2016. [DOI: 10.1007/s10008-016-3372-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Al-Bairuty GA, Boyle D, Henry TB, Handy RD. Sublethal effects of copper sulphate compared to copper nanoparticles in rainbow trout (Oncorhynchus mykiss) at low pH: physiology and metal accumulation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 174:188-198. [PMID: 26966873 DOI: 10.1016/j.aquatox.2016.02.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 02/12/2016] [Accepted: 02/14/2016] [Indexed: 06/05/2023]
Abstract
A few studies have investigated the interaction between copper toxicity and water pH in fishes, but little is known about the effects of acidic pH on the toxicity of copper nanoparticles (Cu-NPs). This study aimed to describe the sub-lethal toxic effects of Cu-NPs compared to CuSO4 at neutral and acidic water pH values in juvenile rainbow trout. Fish were exposed in triplicate (3 tanks/treatment) to control (no added Cu), or 20μgl(-1) of either Cu as CuSO4 or Cu-NPs, at pH 7 and 5 in a semi-static aqueous exposure regime for up to 7 days. Acidification of the water altered the mean primary particle size (at pH 7, 60±2nm and pH 5, 55±1nm) and dialysis experiments to measure dissolution showed an increased release of dissolved Cu from Cu-NPs at pH 5 compared to pH 7. Copper accumulation was observed in the gills of trout exposed to CuSO4 and Cu-NPs at pH 7 and 5, with a greater accumulation from the CuSO4 treatment than Cu-NPs at each pH. The liver also showed Cu accumulation with both Cu treatments at pH 7 only, whereas, the spleen and kidney did not show measurable accumulation of Cu at any of the water pH values. Exposure to acid water caused changes in the ionoregulatory physiology of control fish and also altered the observed effects of Cu exposure; at pH 5, branchial Na(+)/K(+)-ATPase activity was greater than at pH 7 and the inhibition of Na(+)/K(+)-ATPase activity caused by exposure to CuSO4 at pH 7 was also not observed. There were some changes in haematology and depletion of plasma Na(+) at pH 7 and 5 due to Cu exposure, but there were few material-type or pH effects. Overall, the data show that the accumulation of Cu is greater from CuSO4 than Cu-NPs; however, understanding of the effects of low pH on bioavailability of CuSO4 may not be directly transferred to Cu-NPs without further consideration of the physico-chemical behaviour of Cu-NPs in acid water.
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Affiliation(s)
- Genan A Al-Bairuty
- Ecotoxicology Research and Innovation Centre, School of Biological Sciences, Plymouth University, Plymouth, UK
| | - David Boyle
- Ecotoxicology Research and Innovation Centre, School of Biological Sciences, Plymouth University, Plymouth, UK
| | - Theodore B Henry
- Ecotoxicology Research and Innovation Centre, School of Biological Sciences, Plymouth University, Plymouth, UK; School of Life Sciences, Heriot-Watt University, Edinburgh, UK; Department of Forestry Wildlife and Fisheries, and Center for Environmental Biotechnology, The University of Tennessee, Knoxville, TN, USA
| | - Richard D Handy
- Ecotoxicology Research and Innovation Centre, School of Biological Sciences, Plymouth University, Plymouth, UK.
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23
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Duval JFL, Présent RM, Rotureau E. Kinetic and thermodynamic determinants of trace metal partitioning at biointerphases: the role of intracellular speciation dynamics. Phys Chem Chem Phys 2016; 18:30415-30435. [DOI: 10.1039/c6cp05717a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theory is elaborated for rationalizing the impacts of intracellular metal speciation dynamics on metal uptake in suspension of charged microorganisms beyond the classical thermodynamic representation.
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Affiliation(s)
- Jérôme F. L. Duval
- CNRS
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC)
- UMR 7360
- Vandoeuvre-lès-Nancy F-54501
- France
| | - Romain M. Présent
- CNRS
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC)
- UMR 7360
- Vandoeuvre-lès-Nancy F-54501
- France
| | - Elise Rotureau
- CNRS
- Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC)
- UMR 7360
- Vandoeuvre-lès-Nancy F-54501
- France
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24
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Town RM, van Leeuwen HP. Metal ion–humic acid nanoparticle interactions: role of both complexation and condensation mechanisms. Phys Chem Chem Phys 2016; 18:18024-32. [DOI: 10.1039/c6cp02634f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A counterion condensation – Donnan electrostatic model provides a physicochemically consistent description of intraparticulate metal species distributions in humic acid nanoparticles.
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Affiliation(s)
- Raewyn M. Town
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense
- Denmark
| | - Herman P. van Leeuwen
- Physical Chemistry and Soft Matter
- Wageningen University & Research
- 6708 WE Wageningen
- The Netherlands
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25
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Rotureau E. Analysis of metal speciation dynamics in clay minerals dispersion by stripping chronopotentiometry techniques. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2013.09.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Polyakov PD, Duval JFL. Speciation dynamics of metals in dispersion of nanoparticles with discrete distribution of charged binding sites. Phys Chem Chem Phys 2014; 16:1999-2010. [DOI: 10.1039/c3cp54659d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Liu J, Ma J, He C, Li X, Zhang W, Xu F, Lin Y, Wang L. Inhibition of cadmium ion uptake in rice (Oryza sativa) cells by a wall-bound form of silicon. THE NEW PHYTOLOGIST 2013; 200:691-699. [PMID: 24102436 DOI: 10.1111/nph.12494] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 08/13/2013] [Indexed: 05/06/2023]
Abstract
The stresses acting on plants that are alleviated by silicon (Si) range from biotic to abiotic stresses, such as heavy metal toxicity. However, the mechanism of stress alleviation by Si at the single-cell level is poorly understood. We cultivated suspended rice (Oryza sativa) cells and protoplasts and investigated them using a combination of plant nutritional and physical techniques including inductively coupled plasma mass spectrometry (ICP-MS), the scanning ion-selective electrode technique (SIET) and X-ray photoelectron spectroscopy (XPS). We found that most Si accumulated in the cell walls in a wall-bound organosilicon compound. Total cadmium (Cd) concentrations in protoplasts from Si-accumulating (+Si) cells were significantly reduced at moderate concentrations of Cd in the culture medium compared with those from Si-limiting (-Si) cells. In situ measurement of cellular fluxes of the cadmium ion (Cd(2+) ) in suspension cells and root cells of rice exposed to Cd(2+) and/or Si treatments showed that +Si cells significantly inhibited the net Cd(2+) influx, compared with that in -Si cells. Furthermore, a net negative charge (charge density) within the +Si cell walls could be neutralized by an increase in the Cd(2+) concentration in the measuring solution. A mechanism of co-deposition of Si and Cd in the cell walls via a [Si-wall matrix]Cd co-complexation may explain the inhibition of Cd ion uptake, and may offer a plausible explanation for the in vivo detoxification of Cd in rice.
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Affiliation(s)
- Jian Liu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Jie Ma
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Congwu He
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiuli Li
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Wenjun Zhang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Fangsen Xu
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yongjun Lin
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lijun Wang
- College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
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28
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Maurer F, Christl I, Fulda B, Voegelin A, Kretzschmar R. Copper redox transformation and complexation by reduced and oxidized soil humic Acid. 2. Potentiometric titrations and dialysis cell experiments. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:10912-10921. [PMID: 24050604 DOI: 10.1021/es4024095] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cation binding and electron transfer reactions of humic substances determine copper speciation in redox-dynamic systems, but quantitative studies for Cu+ binding to humic substances are lacking. We investigated reduction of Cu2+ and binding of Cu+ at pH 7.0 in a dialysis cell experiment using reduced and reoxidized soil humic acid (HA) as reductant and sorbent at copper loadings of 9.5-600 mmol kg(-1). The data were used to quantitatively explain the interaction between cation binding and electron transfer processes that determine copper speciation in the presence of HA under anoxic and oxic conditions. Addition of Cu2+ to reduced HA resulted in almost complete reduction to Cu(I) within 1 h. Reduction was also significant under oxic conditions. The slow decrease of the Cu(I) fraction was attributed to formation of Cu(0) based on thermodynamic consideration. Cu+ binding to HA was found to be strong compared to other chalcophile cations like Ag+ or Cd2+. Our results indicate that Cu+ and Cu2+ isotherms exhibit a redox potential-dependent intersection point. According to the differences in Cu+ and Cu2+ binding, the presence of HA was found to extend the stability field of Cu(II) to moderately reducing conditions and to reduce the stability field of Cu(0) due to the formation of Cu(I) complexes.
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Affiliation(s)
- Felix Maurer
- Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich , CH-8092 Zurich, Switzerland
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29
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van Leeuwen HP, Buffle J, Duval JFL, Town RM. Understanding the extraordinary ionic reactivity of aqueous nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:10297-10302. [PMID: 23909643 DOI: 10.1021/la401955x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanoparticles (NPs) are generally believed to derive their high reactivity from the inherently large specific surface area. Here we show that this is just the trivial part of a more involved picture. Nanoparticles that carry electric charge are able to generate chemical reaction rates that are even substantially larger than those for similar molecular reactants. This is achieved by Boltzmann accumulation of ionic reactants and the Debye acceleration of their transport. The ensuing unique reactivity features are general for all types of nanoparticles but most prominent for soft ones that exploit the accelerating mechanisms on a 3D level. These features have great potential for exploitation in the catalysis of ionic reactions: the reactivity of sites can be enhanced by increasing the indifferent charge density in the NP body.
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Affiliation(s)
- Herman P van Leeuwen
- Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
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Town RM, Buffle J, Duval JFL, van Leeuwen HP. Chemodynamics of Soft Charged Nanoparticles in Aquatic Media: Fundamental Concepts. J Phys Chem A 2013; 117:7643-54. [DOI: 10.1021/jp4044368] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raewyn M. Town
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej
55, 5230 Odense, Denmark
| | - Jacques Buffle
- CABE, Section de Chimie et Biochimie, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, CH-1211
Geneva 4, Switzerland
| | - Jérôme F. L. Duval
- Université de Lorraine and CNRS, LIEC (Laboratoire
Interdisciplinaire des Environnements Continentaux), UMR 7360, 15
avenue du Charmois, Vandoeuvre-lès-Nancy, F-54501 France
| | - Herman P. van Leeuwen
- Laboratory of Physical Chemistry
and Colloid Science, Wageningen University, Dreijenplein 6, 6703 HB Wageningen, The Netherlands
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Duval JFL. Dynamics of metal uptake by charged biointerphases: bioavailability and bulk depletion. Phys Chem Chem Phys 2013; 15:7873-88. [DOI: 10.1039/c3cp00002h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Town RM, van Leeuwen HP, Buffle J. Chemodynamics of soft nanoparticulate complexes: Cu(II) and Ni(II) complexes with fulvic acids and aquatic humic acids. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:10487-10498. [PMID: 22934531 DOI: 10.1021/es3018013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The dynamics of metal complexation by small humic substances (fulvic acid and aquatic humic acid, collectively denoted as “fulvic-like substance”, FS) are explored within the framework of concepts recently developed for soft nanoparticulate complexants. From a comprehensive collection of published equilibrium and dissociation rate constants for CuFS and NiFS complexes, the association rate constant, ka, is determined as a function of the degree of complexing site occupation, θ. From this large data set, it is shown for the first time that ka is independent of θ. This result has important consequences for finding the nature of the rate limiting step in the association process. The influence of electric effects on the rate of the association process is described, namely (i) the accelerating effect of the negatively charged electrostatic field of FS on the diffusion of metal ions toward it, and (ii) the extent to which metal ions electrostatically accumulate in the counterionic atmosphere of FS. These processes are discussed qualitatively in relation to the derived values of ka. For slowly dehydrating metal ions such as Ni(H2O)6 2+ (dehydration rate constant, kw), ka is expected to derive straight from kw. In contrast, for rapidly dehydrating metal ions such as Cu(H2O)6 2+, transport limitations and electric effects involved in the formation of the precursor outer-sphere associate appear to be important overall rate-limiting factors. This is of great significance for understanding the chemodynamics of humic complexes in the sense that inner-sphere complex formation would not always be the (sole) rate limiting step.
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Affiliation(s)
- Raewyn M Town
- Institute of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense, Denmark.
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