1
|
Simultaneous separation and determination of five monoterpene glycosides in Paeonia suffruticosa flower samples by ultra-high-performance liquid chromatography with a novel reinforced cloud point extraction based on ionic liquid. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
2
|
Campos DA, Schaumann GE, Philippe A. Natural TiO 2-Nanoparticles in Soils: A Review on Current and Potential Extraction Methods. Crit Rev Anal Chem 2020; 52:1-21. [PMID: 33054361 DOI: 10.1080/10408347.2020.1823812] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The monitoring of anthropogenic TiO2-nanoparticles in soils is challenged by the knowledge gap on their characteristics of the large natural TiO2-nanoparticle pool. Currently, no efficient method is available for characterizing natural TiO2-nanoparticles in soils without an extraction procedure. Considering the reported diversity of extraction methods, the following article reviews and discusses their potential for TiO2 from soils, focusing on the selectivity and the applicability to complex samples. It is imperative to develop a preparative step reducing analytical interferences and producing a stable colloidal dispersion. It is suggested that an oxidative treatment, followed by alkaline conditioning and the application of dispersive agents, achieve such task. This enables the further separation and characterization through size or surface-based separation (i.e., hydrodynamic fractionation methods, filtration or sequential centrifugation). Meanwhile, cloud point extraction, gel electrophoresis, and electrophoretic deposition have been studied on various nanoparticles but not on TiO2-nanoparticles. Furthermore, industrially applied methods in, for example, kaolin processing (flotation and flocculation) are interesting but require further improvements on terms of selectivity and applicability to soil samples. Overall, none of the current extraction methods is sufficient toward TiO2; however, further optimization or combination of orthogonal techniques could help reaching a fair selectivity toward TiO2.
Collapse
Affiliation(s)
- Daniel Armando Campos
- iES, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Landau in der Pfalz, Germany
| | - Gabriele Ellen Schaumann
- iES, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Landau in der Pfalz, Germany
| | - Allan Philippe
- iES, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, University of Koblenz-Landau, Landau in der Pfalz, Germany
| |
Collapse
|
3
|
Georgantzopoulou A, Farkas J, Ndungu K, Coutris C, Carvalho PA, Booth AM, Macken A. Wastewater-Aged Silver Nanoparticles in Single and Combined Exposures with Titanium Dioxide Affect the Early Development of the Marine Copepod Tisbe battagliai. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:12316-12325. [PMID: 32852942 DOI: 10.1021/acs.est.0c03113] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In this study, the effects of aged Ag and TiO2 nanoparticles (NPs), individually and as a mixture, in wastewater relative to their pristine counterparts on the development of the copepod nauplii (Tisbe battagliai) were investigated. NP behavior in synthetic wastewater and seawater was characterized during aging and exposure. A delayed development and subsequent mortality were observed after 6 days of exposure to aged Ag NPs, with a twofold decrease in EC50 (316 μg/L) compared to pristine NPs (EC50 640 μg/L) despite the similar dissolved Ag concentrations measured for aged and pristine Ag NPs (441 and 378 μg/L, respectively). In coexposures with TiO2 NPs, higher dissolved Ag levels were measured for aged NPs (238.3 μg/L) relative to pristine NPs (98.57 μg/L). Coexposure resulted in a slight decrease (15%) in the Ag NP EC50 (270 μg/L) with a 1.9-fold increase in the Ag NP retained within the organisms after depuration (2.82% retention) compared to Ag NP single exposures as measured with sp-ICP-MS, suggesting that the particles are still bioavailable despite the heteroaggregation observed between Ag, Ti NPs, and wastewater components. This study shows that the presence of TiO2 NPs can affect the stability and toxicity of Ag NPs in complex media that cannot be predicted solely based on ionic, total, or nanoparticulate concentrations, and the need for studying NP interactions in more complex matrices is highlighted.
Collapse
Affiliation(s)
| | - Julia Farkas
- SINTEF Ocean, Brattørkaia 17C, 7010 Trondheim, Norway
| | - Kuria Ndungu
- NIVA, Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway
| | - Claire Coutris
- NIBIO Norwegian Institute of Bioeconomy Research, Høyskoleveien 7, 1431 Ås, Norway
| | | | - Andy M Booth
- SINTEF Ocean, Brattørkaia 17C, 7010 Trondheim, Norway
| | - Ailbhe Macken
- NIVA, Norwegian Institute for Water Research, Gaustadalleen 21, 0349 Oslo, Norway
| |
Collapse
|
4
|
Steinhoff B, Müller J, Mozhayeva D, Spelz BTF, Engelhard C, Butz B, Schönherr H. Investigation of the Fate of Silver and Titanium Dioxide Nanoparticles in Model Wastewater Effluents via Selected Area Electron Diffraction. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:8681-8689. [PMID: 32539366 DOI: 10.1021/acs.est.9b07840] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The increasing use of manufactured nanomaterials (MNMs) and their inevitable release into the environment, especially via wastewater treatment plants (WWTPs), poses a potential threat for aquatic organisms. The characterization of MNMs with analytical tools to comprehend their fate and effect on the ecosystem is hence of great importance for environmental risk assessment. We herein report, for the first time, the investigation of physicochemical transformation processes during artificial wastewater treatment of silver (Ag-NPs) and titanium dioxide nanoparticles (TiO2-NPs) via selected area electron diffraction (SAED). TiO2-NPs with an anatase/rutile ratio of ∼80/20 were found to not undergo any physicochemical transformation, as shown via previous energy-dispersive X-ray analysis (EDX) elemental mapping and crystal structure analysis via SAED. In contrast, Ag-NPs were colocalized with substantial amounts of sulfur (Ag/S ratio of 1.9), indicating the formation of Ag2S. SAED ultimately proved the complete transformation of face-centered cubic (fcc) Ag-NPs into monoclinic Ag2S-NPs. The size distribution of both nanomaterials remained virtually unchanged. Our investigations show that cloud point extraction of NPs and their subsequent crystal structure analysis via SAED is another valuable approach toward the comprehensive investigation of wastewater-borne MNMs. However, the extraction procedure needs optimization for environmentally low NP concentrations.
Collapse
Affiliation(s)
- Benedikt Steinhoff
- Physical Chemistry I, Department of Chemistry-Biology, University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
- Center of Micro- and Nanochemistry and Engineering (Cμ), University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
| | - Julian Müller
- Micro- and Nanoanalytics Group, University of Siegen, Hölderlinstrasse 3, 57076 Siegen, Germany
| | - Darya Mozhayeva
- Analytical Chemistry, Department of Chemistry-Biology, University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
| | - Bastian T F Spelz
- Analytical Chemistry, Department of Chemistry-Biology, University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
| | - Carsten Engelhard
- Center of Micro- and Nanochemistry and Engineering (Cμ), University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
- Analytical Chemistry, Department of Chemistry-Biology, University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
| | - Benjamin Butz
- Micro- and Nanoanalytics Group, University of Siegen, Hölderlinstrasse 3, 57076 Siegen, Germany
| | - Holger Schönherr
- Physical Chemistry I, Department of Chemistry-Biology, University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
- Center of Micro- and Nanochemistry and Engineering (Cμ), University of Siegen, Adolf-Reichwein-Strasse 2, 57076 Siegen, Germany
| |
Collapse
|
5
|
Baur S, Reemtsma T, Stärk HJ, Wagner S. Surfactant assisted extraction of incidental nanoparticles from road runoff sediment and their characterization by single particle-ICP-MS. CHEMOSPHERE 2020; 246:125765. [PMID: 31927370 DOI: 10.1016/j.chemosphere.2019.125765] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/25/2019] [Accepted: 12/26/2019] [Indexed: 06/10/2023]
Abstract
A surfactant assisted extraction (SAE) method was developed to extract incidental nanoparticles (INPs) in the <300 nm particle size fraction from road runoff sediments and applied to a road runoff sediment. The method was evaluated by spiking experiments of road runoff sediment with engineered nanoparticle (ENP) suspensions of gold (Au-ENPs) between 30 nm and 200 nm and platinum (Pt-ENPs) between 30 nm and 70 nm with content ranging from 40 to 800 ng/g. Suspensions were analyzed by single particle (sp-)ICP-MS. In the presence of a road runoff matrix, an increase in ENP sizes by a maximum of 8% for Au-ENPs and 9% for Pt-ENPs was observed. ENPs mass recovery was >50% for all Au-ENPs with content higher than 200 ng/g and for 30 and 50 nm Pt-ENPs at content of 160 ng/g while for lower content the recovery was 0%. For 70 nm Pt-ENPs, recovery was always >80% and increased with increasing Pt content up to 100% in the presence of road runoff matrix. Metal content of INPs in the road runoff sediment in the fraction <300 nm decreased from copper (Cu; μg/g)> zinc (Zn)> zirconium (Zr)> cerium (Ce)> lead (Pb)> cadmium (Cd) > platinum (Pt; μg/g). Over 90% of Pt-, Zn-, Cd-, Pb- and Ce-INPs are composed of particles with less than 20 fg, while Zr- and Cu-INPs are dominated by masses higher than 20 fg. The tested SAE may be applicable to determine environmental contents of INPs in sediments and possibly in soils.
Collapse
Affiliation(s)
- Sandra Baur
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Thorsten Reemtsma
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany; University of Leipzig, Institute of Analytical Chemistry, Linnéstrasse 3, 04103, Leipzig, Germany
| | - Hans-Joachim Stärk
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Stephan Wagner
- Department of Analytical Chemistry, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstrasse 15, 04318, Leipzig, Germany.
| |
Collapse
|
6
|
López-Mayan J, Barciela-Alonso MC, Domínguez-González MR, Peña-Vázquez E, Bermejo-Barrera P. Cloud point extraction and ICP-MS for titanium speciation in water samples. Microchem J 2020. [DOI: 10.1016/j.microc.2019.104264] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
7
|
Bi X, Ma H, Westerhoff P. Dry Powder Assay Rapidly Detects Metallic Nanoparticles in Water by Measuring Surface Catalytic Reactivity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:13289-13297. [PMID: 30351045 DOI: 10.1021/acs.est.8b03915] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We designed the "catalytic reactivity to nanoparticle" assay (CRNP), which uses a dry powder containing methylene blue (MB) and sodium borohydride (NaBH4) to rapidly (2 min) detect metallic nanoparticles in water. Tested with gold (Au) NPs in water, the CRNP response was linearly and reproducibly correlated to the NP surface-area concentration and has a detection limit of 0.3 m2/m3 as the equivalent surface area of Au NPs. We described the heterogeneous catalytic mechanisms on the NP surface by treating the NPs as electrodes, which store and transfer electrons, and comprehensively simulated the kinetics of borohydride hydrolysis, MB reduction, and leuco methylene blue (LMB) oxidation. CRNP was able to assess the catalytic reactivity of multiple engineered NP species in water, including Au, silver, palladium, platinum, and copper oxide (CuO), and quantify them with pre-established calibration curves. In water samples containing known or unknown NP species, CRNP can be reported as an equivalent surface area of gold NPs per volume of solution and directly quantifies NP reactivity in response to electron mediated stimuli, which may become relevant to the environmental fate or safety of nanomaterials.
Collapse
Affiliation(s)
- Xiangyu Bi
- School of Sustainable Engineering and the Built Environment , Arizona State University , Tempe , Arizona 85287 , United States
| | - Hongfang Ma
- School of Sustainable Engineering and the Built Environment , Arizona State University , Tempe , Arizona 85287 , United States
- Department of Municipal Engineering, College of Civil Engineering , Huaqiao University , Xiamen 361021 , China
| | - Paul Westerhoff
- School of Sustainable Engineering and the Built Environment , Arizona State University , Tempe , Arizona 85287 , United States
| |
Collapse
|
8
|
Venkatesan AK, Reed RB, Lee S, Bi X, Hanigan D, Yang Y, Ranville JF, Herckes P, Westerhoff P. Detection and Sizing of Ti-Containing Particles in Recreational Waters Using Single Particle ICP-MS. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2018; 100:120-126. [PMID: 29164274 DOI: 10.1007/s00128-017-2216-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 11/15/2017] [Indexed: 06/07/2023]
Abstract
Single particle inductively coupled plasma mass spectrometry (spICP-MS) was used to detect Ti-containing particles in heavily-used bathing areas of a river (Salt River) and five swimming pools. Ti-containing particle concentrations in swimming pools ranged from 2.8 × 103 to 4.4 × 103 particles/mL and were an order of magnitude lower than those detected in the Salt River. Measurements from the Salt River showed an 80% increase in Ti-containing particle concentration over baseline concentration during peak recreational activity (at 16:00 h) in the river. Cloud point extraction followed by transmission electron microscopy with energy dispersive X-ray analysis confirmed presence of aggregated TiO2 particles in river samples, showing morphological similarity to particles present in an over-the-counter sunscreen product. The maximum particle mass concentration detected in a sample from the Salt River (659 ng/L) is only slightly lower than the predicted no effect concentration for TiO2 to aquatic organisms (< 1 μg/L).
Collapse
Affiliation(s)
- Arjun K Venkatesan
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA.
- Center for Clean Water Technology, Department of Civil Engineering, Stony Brook University, Stony Brook, NY, 11794, USA.
| | - Robert B Reed
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO, 80401, USA
| | - Sungyun Lee
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
- Environmental System Research Division, Korea Institute of Machinery and Materials, Daejeon, 34103, Republic of Korea
| | - Xiangyu Bi
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
| | - David Hanigan
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
- Department of Civil and Environmental Engineering, University of Nevada, Reno, NV, 89557-0258, USA
| | - Yu Yang
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
| | - James F Ranville
- Department of Chemistry and Geochemistry, Colorado School of Mines, Golden, CO, 80401, USA
| | - Pierre Herckes
- School of Molecular Sciences, Arizona State University, Tempe, AZ, 85287-1604, USA
| | - Paul Westerhoff
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA
| |
Collapse
|
9
|
DeLoid GM, Wang Y, Kapronezai K, Lorente LR, Zhang R, Pyrgiotakis G, Konduru NV, Ericsson M, White JC, De La Torre-Roche R, Xiao H, McClements DJ, Demokritou P. An integrated methodology for assessing the impact of food matrix and gastrointestinal effects on the biokinetics and cellular toxicity of ingested engineered nanomaterials. Part Fibre Toxicol 2017; 14:40. [PMID: 29029643 PMCID: PMC5640936 DOI: 10.1186/s12989-017-0221-5] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 09/18/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Engineered nanomaterials (ENMs) are increasingly added to foods to improve their quality, sensory appeal, safety and shelf-life. Human exposure to these ingested ENMs (iENMS) is inevitable, yet little is known of their hazards. To assess potential hazards, efficient in vitro methodologies are needed to evaluate particle biokinetics and toxicity. These methodologies must account for interactions and transformations of iENMs in foods (food matrix effect) and in the gastrointestinal tract (GIT) that are likely to determine nano-biointeractions. Here we report the development and application of an integrated methodology consisting of three interconnected stages: 1) assessment of iENM-food interactions (food matrix effect) using model foods; 2) assessment of gastrointestinal transformations of the nano-enabled model foods using a three-stage GIT simulator; 3) assessment of iENMs biokinetics and cellular toxicity after exposure to simulated GIT conditions using a triculture cell model. As a case study, a model food (corn oil-in-water emulsion) was infused with Fe2O3 (Iron(III) oxide or ferric oxide) ENMs and processed using this three-stage integrated platform to study the impact of food matrix and GIT effects on nanoparticle biokinetics and cytotoxicity . METHODS A corn oil in phosphate buffer emulsion was prepared using a high speed blender and high pressure homogenizer. Iron oxide ENM was dispersed in water by sonication and combined with the food model. The resulting nano-enabled food was passed through a three stage (mouth, stomach and small intestine) GIT simulator. Size distributions of nano-enabled food model and digestae at each stage were analyzed by DLS and laser diffraction. TEM and confocal imaging were used to assess morphology of digestae at each phase. Dissolution of Fe2O3 ENM along the GIT was assessed by ICP-MS analysis of supernatants and pellets following centrifugation of digestae. An in vitro transwell triculture epithelial model was used to assess biokinetics and toxicity of ingested Fe2O3 ENM. Translocation of Fe2O3 ENM was determined by ICP-MS analysis of cell lysates and basolateral compartment fluid over time. RESULTS It was demonstrated that the interactions of iENMs with food and GIT components influenced nanoparticle fate and transport, biokinetics and toxicological profile. Large differences in particle size, charge, and morphology were observed in the model food with and without Fe2O3 and among digestae from different stages of the simulated GIT (mouth, stomach, and small intestine). Immunoflorescence and TEM imaging of the cell culture model revealed markers and morphology of small intestinal epithelium including enterocytes, goblet cells and M cells. Fe2O3 was not toxic at concentrations tested in the digesta. In biokinetics studies, translocation of Fe2O3 after 4 h was <1% and ~2% for digesta with and without serum, respectively, suggesting that use of serum proteins alters iENMs biokinetics and raises concerns about commonly-used approaches that neglect iENM - food-GIT interactions or dilute digestae in serum-containing media. CONCLUSIONS We present a simple integrated methodology for studying the biokinetics and toxicology of iENMs, which takes into consideration nanoparticle-food-GIT interactions. The importance of food matrix and GIT effects on biointeractions was demonstrated, as well as the incorporation of these critical factors into a cellular toxicity screening model. Standardized food models still need to be developed and used to assess the effect of the food matrix effects on the fate and bioactivity of iENMs since commercial foods vary considerably in their compositions and structures.
Collapse
Affiliation(s)
- Glen M. DeLoid
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Yanli Wang
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Klara Kapronezai
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Laura Rubio Lorente
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Roujie Zhang
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - Georgios Pyrgiotakis
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Nagarjun V. Konduru
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Maria Ericsson
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115 USA
| | - Jason C. White
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06504 USA
| | - Roberto De La Torre-Roche
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06504 USA
| | - Hang Xiao
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - David Julian McClements
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| |
Collapse
|
10
|
Garner KL, Suh S, Keller AA. Assessing the Risk of Engineered Nanomaterials in the Environment: Development and Application of the nanoFate Model. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:5541-5551. [PMID: 28443660 DOI: 10.1021/acs.est.6b05279] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We developed a dynamic multimedia fate and transport model (nanoFate) to predict the time-dependent accumulation of metallic engineered nanomaterials (ENMs) across environmental media. nanoFate considers a wider range of processes and environmental subcompartments than most previous models and considers ENM releases to compartments (e.g., urban, agriculture) in a manner that reflects their different patterns of use and disposal. As an example, we simulated ten years of release of nano CeO2, CuO, TiO2, and ZnO in the San Francisco Bay area. Results show that even soluble metal oxide ENMs may accumulate as nanoparticles in the environment in sufficient concentrations to exceed the minimum toxic threshold in freshwater and some soils, though this is more likely with high-production ENMs such as TiO2 and ZnO. Fluctuations in weather and release scenario may lead to circumstances where predicted ENM concentrations approach acute toxic concentrations. The fate of these ENMs is to mostly remain either aggregated or dissolved in agricultural lands receiving biosolids and in freshwater or marine sediments. Comparison to previous studies indicates the importance of some key model aspects including climatic and temporal variations, how ENMs may be released into the environment, and the effect of compartment composition on predicted concentrations.
Collapse
Affiliation(s)
- Kendra L Garner
- Bren School of Environmental Science & Management, University of California , SantaBarbara, California 93106, United States
| | - Sangwon Suh
- Bren School of Environmental Science & Management, University of California , SantaBarbara, California 93106, United States
| | - Arturo A Keller
- Bren School of Environmental Science & Management, University of California , SantaBarbara, California 93106, United States
| |
Collapse
|