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Shao P, Chen Y, Gu D, Zeng J, Zhang S, Wu Y, Lin X. Resistance and resilience of soil bacterial community to zero-valent iron disposal of lindane contamination. CHEMOSPHERE 2022; 306:135612. [PMID: 35817188 DOI: 10.1016/j.chemosphere.2022.135612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 04/29/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
Zero-valent iron (ZVI, Fe0) enables chemical reduction of environmental pollutants coupled with reactivity loss due to surface oxidation. During ZVI treatment process, however, microbial community stability in terms of resistance and resilience remains largely unclear. Here, we monitored bacterial community succession over a 4 weeks period in soil microcosms with or without 2% (w/w) Fe0 amendment. To simulate soil pollution, 100 μg g-1 chlorinated pesticide lindane (γ-hexachlorocyclohexane) was added to the microcosms as a model contaminant. In addition to microbial activity as measured by soil organic carbon mineralization, bacterial abundance, diversity and composition were determined using qPCR and high-throughput sequencing of 16 S rRNA genes. Co-occurrence analysis was performed to reveal the interaction patterns within the bacterial communities. The results indicated that ZVI caused near-complete transformation of lindane, while in the microcosms without Fe0 amendment the pesticide was recalcitrant. ZVI strongly inhibited CO2-efflux at the early stage of incubation, but the bacterial community appeared to be less sensitive to Fe0 amendment. The ratios of negative to positive correlations between network nodes suggested that Fe0 had marginal influence on community stability compared to the lindane treatments, which destabilized the bacterial community. Community succession occurred in the presence of ZVI, as exemplified by a dominancy transition from anaerobic to aerobic taxa. Yet, ZVI alleviated the stress of lindane on soil bacteria by improving community structure and increasing network complexity. Taken together, these findings demonstrate the stability of soil bacterial community under Fe0 stress, which might be conducive to functional recovery of soil microorganisms following ZVI remediation.
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Affiliation(s)
- Pengfei Shao
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450046, China; Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China.
| | - Yuzhu Chen
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China
| | - Decheng Gu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China
| | - Jun Zeng
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China
| | - Shimin Zhang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450046, China.
| | - Yucheng Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China.
| | - Xiangui Lin
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Science, Nanjing, 210008, China
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Marcon L, Oliveras J, Puntes VF. In situ nanoremediation of soils and groundwaters from the nanoparticle's standpoint: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 791:148324. [PMID: 34412401 DOI: 10.1016/j.scitotenv.2021.148324] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/21/2021] [Accepted: 06/04/2021] [Indexed: 06/13/2023]
Abstract
Anthropogenic pollution coming from industrial processes, agricultural practices and consumer products, results in the release of toxic substances into rural and urban environments. Once released, these chemicals migrate through the atmosphere and water, and find their way into matrices such as sediments and groundwaters, thus making large areas potentially uninhabitable. Common pollutants, including heavy metal(loid)s, radionuclides, aliphatic hydrocarbons and halogenated organics, are known to adversely affect physiological systems in animal species. Pollution can be cleaned up using techniques such as coagulation, reverse osmosis, oxidation and biological methods, among others. The use of nanoparticles (NPs) extends the range of available technologies and offers particular benefits, not only by degrading, transforming and immobilizing contaminants, but also by reaching inaccessible areas and promoting biotic degradation. The development of NPs is understandably heralded as an environmentally beneficial technology; however, it is only now that the ecological risks associated with their use are being evaluated. This review presents recent developments in the use of engineered NPs for the in situ remediation of two paramount environmental matrices: soils and groundwaters. Emphasis will be placed on (i) the successful applications of nano-objects for environmental cleanup, (ii) the potential safety implications caused by the challenging requirements of [high reactivity toward pollutants] vs. [none reactivity toward biota], with a thorough view on their transport and evolution in the matrix, and (iii) the perspectives on scientific and regulatory challenges. To this end, the most promising nanomaterials will be considered, including nanoscale zerovalent iron, nano-oxides and carbonaceous materials. The purpose of the present review is to give an overview of the development of nanoremediators since they appeared in the 2000s, from their chemical modifications, mechanism of action and environmental behavior to an understanding of the problematics (technical limitations, economic constraints and institutional precautionary approaches) that will drive their future full-scale applications.
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Affiliation(s)
- Lionel Marcon
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes (LBBM) USR CNRS 3579, Observatoire Océanologique, F-66650 Banyuls/Mer, France; Université de Perpignan Via Domitia, Biocapteurs-Analyses-Environnement, 66860 Perpignan, France.
| | - Jana Oliveras
- Institut Català de Nanociència i Nanotecnologia (ICN2), Campus de la Universitat Autònoma de Barcelona (Campus UAB), 08193, Bellaterra, Barcelona, Spain; Universitat Autònoma de Barcelona (UAB), Campus UAB, 08193, Bellaterra, Barcelona, Catalonia, Spain
| | - Víctor F Puntes
- Institut Català de Nanociència i Nanotecnologia (ICN2), Campus de la Universitat Autònoma de Barcelona (Campus UAB), 08193, Bellaterra, Barcelona, Spain; Vall d'Hebron Institut de Recerca (VHIR), Edificio Mediterránea, Hospital Vall d'Hebron, Passeig de la Vall d'Hebron, 119-129, 08035 Barcelona, Spain; Institut Català de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08010 Barcelona, Spain
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3
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Visentin C, Trentin AWDS, Braun AB, Thomé A. Nano scale zero valent iron production methods applied to contaminated sites remediation: An overview of production and environmental aspects. JOURNAL OF HAZARDOUS MATERIALS 2021; 410:124614. [PMID: 33246810 DOI: 10.1016/j.jhazmat.2020.124614] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/03/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
The nano scale zero valent iron (nZVI) is the most used material in the remediation process. The inclusion of sustainability in the remediation process has also been gaining prominence. Sustainable remediation seeks to consider the environmental, economic and social impacts of remediation. Thus, this article aims to: (i) identify and describe nZVI production methods and (ii) evaluate their environmental aspects. Thus, this research was carried out in two stages. The first consisted of systematic bibliographical research to identify and describe nZVI production methods. In the second stage, an environmental analysis of the methods was performed considering the methodology of life cycle inventory assessment. Based on the inventory analysis, a classification of environmental aspects was performed, which included criteria, icons and a color scale. Nine nZVI production methods were identified, which comprised different technologies and processes. All methods had negative environmental aspects, such as high energy consumption, waste, wastewater generation and atmospheric emissions. In the classification of methods with regard to environmental aspects, the milling method had the best score, and the ultrasonic wave method the worst. Overall, this study contributes significantly to the detailed knowledge of nZVI synthesis methods in relation to production processes and their environmental aspects.
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Affiliation(s)
- Caroline Visentin
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo, São José Neighborhood, BR 285, 99052-900 Passo Fundo, RS, Brazil.
| | - Adan William da Silva Trentin
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo, São José Neighborhood, BR 285, 99052-900 Passo Fundo, RS, Brazil.
| | - Adeli Beatriz Braun
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo, São José Neighborhood, BR 285, 99052-900 Passo Fundo, RS, Brazil.
| | - Antônio Thomé
- Graduate Program in Civil and Environmental Engineering, University of Passo Fundo, São José Neighborhood, BR 285, 99052-900 Passo Fundo, RS, Brazil.
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Castaño A, Prosenkov A, Baragaño D, Otaegui N, Sastre H, Rodríguez-Valdés E, Gallego JLR, Peláez AI. Effects of in situ Remediation With Nanoscale Zero Valence Iron on the Physicochemical Conditions and Bacterial Communities of Groundwater Contaminated With Arsenic. Front Microbiol 2021; 12:643589. [PMID: 33815330 PMCID: PMC8010140 DOI: 10.3389/fmicb.2021.643589] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/25/2021] [Indexed: 12/31/2022] Open
Abstract
Nanoscale Zero-Valent Iron (nZVI) is a cost-effective nanomaterial that is widely used to remove a broad range of metal(loid)s and organic contaminants from soil and groundwater. In some cases, this material alters the taxonomic and functional composition of the bacterial communities present in these matrices; however, there is no conclusive data that can be generalized to all scenarios. Here we studied the effect of nZVI application in situ on groundwater from the site of an abandoned fertilizer factory in Asturias, Spain, mainly polluted with arsenic (As). The geochemical characteristics of the water correspond to a microaerophilic and oligotrophic environment. Physico-chemical and microbiological (cultured and total bacterial diversity) parameters were monitored before and after nZVI application over six months. nZVI treatment led to a marked increase in Fe(II) concentration and a notable fall in the oxidation-reduction potential during the first month of treatment. A substantial decrease in the concentration of As during the first days of treatment was observed, although strong fluctuations were subsequently detected in most of the wells throughout the six-month experiment. The possible toxic effects of nZVI on groundwater bacteria could not be clearly determined from direct observation of those bacteria after staining with viability dyes. The number of cultured bacteria increased during the first two weeks of the treatment, although this was followed by a continuous decrease for the following two weeks, reaching levels moderately below the initial number at the end of sampling, and by changes in their taxonomic composition. Most bacteria were tolerant to high As(V) concentrations and showed the presence of diverse As resistance genes. A more complete study of the structure and diversity of the bacterial community in the groundwater using automated ribosomal intergenic spacer analysis (ARISA) and sequencing of the 16S rRNA amplicons by Illumina confirmed significant alterations in its composition, with a reduction in richness and diversity (the latter evidenced by Illumina data) after treatment with nZVI. The anaerobic conditions stimulated by treatment favored the development of sulfate-reducing bacteria, thereby opening up the possibility to achieve more efficient removal of As.
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Affiliation(s)
- Ana Castaño
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain
| | - Alexander Prosenkov
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain
| | - Diego Baragaño
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus of Mieres, University of Oviedo, Mieres, Spain
| | - Nerea Otaegui
- TECNALIA, Basque Research and Technology Alliance (BRTA), Parque Tecnológico de Bizkaia, Derio, Spain
| | - Herminio Sastre
- Department of Chemical and Environmental Engineering and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain
| | - Eduardo Rodríguez-Valdés
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus of Mieres, University of Oviedo, Mieres, Spain
| | - José Luis R Gallego
- INDUROT and Environmental Biogeochemistry and Raw Materials Group, Campus of Mieres, University of Oviedo, Mieres, Spain
| | - Ana Isabel Peláez
- Area of Microbiology, Department of Functional Biology and Environmental Biogeochemistry and Raw Materials Group, University of Oviedo, Oviedo, Spain.,University Institute of Biotechnology of Asturias (IUBA), University of Oviedo, Oviedo, Spain
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5
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Basak G, Hazra C, Sen R. Biofunctionalized nanomaterials for in situ clean-up of hydrocarbon contamination: A quantum jump in global bioremediation research. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 256:109913. [PMID: 31818738 DOI: 10.1016/j.jenvman.2019.109913] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 11/18/2019] [Accepted: 11/22/2019] [Indexed: 06/10/2023]
Abstract
Interfacing organic or inorganic nanoparticles with biological entities or molecules or systems with the aim of developing functionalized nano-scale materials or composites for remediation of persistent organic hydrocarbon pollutants (such as monocyclic and polycyclic aromatic hydrocarbons, MAH/PAH) has generated great interest and continues to grow almost unabated. However, the usefulness and potency of these materials or conjugates hinges over several key barriers, including structural assembly with fine-tuned control over nanoparticle/biomolecule ratio, spatial orientation and activity of biomolecules, the nano/bio-interface strategy and hierarchical architecture, water-dispersibility and long term colloidal stability in environmental media, and non-specific toxicity. The present review thus critically analyses, discusses and interprets recently reported attempts and approaches to functionalize nanoparticles with biomolecules. Since there is no comprehensive and critical reviews on the applications of nanotechnology in bioremediation of MAHs/PAHs, this overview essentially captures the current global scenario and vision on the use and future prospects of biofunctionalized nanomaterials with respect to their strategic interactions involved at the nano/bio-interface essential to understand and decipher the structural and functional relationships and their impact on persistent hydrocarbon remediation.
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Affiliation(s)
- Geetanjali Basak
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - Chinmay Hazra
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India
| | - Ramkrishna Sen
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
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6
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Sun Y, Jing R, Zheng F, Zhang S, Jiao W, Wang F. Evaluating phytotoxicity of bare and starch-stabilized zero-valent iron nanoparticles in mung bean. CHEMOSPHERE 2019; 236:124336. [PMID: 31310976 DOI: 10.1016/j.chemosphere.2019.07.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/04/2019] [Accepted: 07/08/2019] [Indexed: 06/10/2023]
Abstract
Zero-valent iron nanoparticles (nZVI) are among the most widely used nanoparticles in nanoremediation of various environmental pollutants. Environmental fate and impact of nZVI has attracted increasing concerns due to their potential risks. However, phytotoxicity of nZVI still remains poorly understood. Here, the phytotoxic effects of bare nZVI (B-nZVI) and starch-stabilized nZVI (S-nZVI) were evaluated on the germination of mung bean seeds exposed to suspensions with different doses of 0-1000 mg/L and the growth of hydroponically cultured seedling at 600 mg/L. In most cases, B-nZVI had no inhibition on seed germination, and even promotion on shoot and root elongation. However, S-nZVI displayed dose-dependent effects, with a decreased germination rate at 600-750 mg/L. B-nZVI at 600 mg/L showed no obvious phytotoxic but even stimulatory effects on seedling growth. Comparatively, S-nZVI at 600 mg/L produced significant phytotoxicity on mung bean plants, leading to decreased seedling growth, altered nutritional balance, and excess Fe accumulation in roots (>400 mg/kg). S-nZVI were observed to form a coating of insoluble Fe(III) compounds on root surface. Simultaneously, some nZVI penetrated and accumulated into root cells, but did not move to shoots. In conclusion, B-nZVI easily aggregate into larger particles in solution, leading to decreased adhesion to root surface and lower uptake by roots, whereas the higher dispersity and hydrophilicity of S-nZVI makes them more readily be adhered to root surface forming a coating, and penetrated into roots, resulting in excess Fe accumulation, consequently interfering with root functions such as the adsorption and transport of water and nutrients.
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Affiliation(s)
- Yuhuan Sun
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, PR China
| | - Rusha Jing
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, PR China
| | - Fangyuan Zheng
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, PR China
| | - Shuwu Zhang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, PR China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China
| | - Wentao Jiao
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Fayuan Wang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong Province, 266042, PR China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
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7
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Gil-Díaz M, Rodríguez-Valdés E, Alonso J, Baragaño D, Gallego JR, Lobo MC. Nanoremediation and long-term monitoring of brownfield soil highly polluted with As and Hg. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 675:165-175. [PMID: 31026640 DOI: 10.1016/j.scitotenv.2019.04.183] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
In the last decade, several laboratory-scale experiments have shown the use of nanoscale zero-valent iron (nZVI) to be effective in reducing metal(loid) availability in polluted soils. The present study evaluates the capacity of nZVI for reducing the availability of As and Hg in brownfield soils at a pilot scale, and monitors the stability of the immobilization of these contaminants over a 32 month period. To the best of our knowledge, this is the first study to apply nZVI to metal(loid)-polluted soils under field conditions. Two sub-areas (A and B) that differed in pollution load were selected, and a 5 m2 plot was treated with 2.5% nZVI (by weight) in each case (Nanofer 25S, NanoIron). In sub-area A, which had a greater degree of pollution, a second application was performed eight months after the first application. Overall, the treatment significantly reduced the availability of both As and Hg, after only 72 h, although the effectiveness of the treatment was highly dependent on the degree of initial contamination. Sub-area B (with a lower level of pollution) showed the best and most stable immobilization results, with As and Hg in toxicity characteristics leaching procedure (TCLP) extracts decreasing by 70% and 80%, respectively. In comparison, the concentrations of As and Hg in sub-area A decreased by 65% and 50%, respectively. Based on our findings, the use of nZVI at a dose of 2.5% appears to be an effective approach for the remediation of soils at this brownfield site, especially in sub-area B. For sub-area A, a higher dose of nZVI-or its use in combination with other remediation strategies-should be tested.
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Affiliation(s)
- M Gil-Díaz
- IMIDRA, Finca "El Encín", 28800 Alcalá de Henares, Madrid, Spain.
| | - E Rodríguez-Valdés
- INDUROT and Environmental Biotechnology & Geochemistry Group, University of Oviedo, C/Gonzalo Gutiérrez Quirós s/n, 33600 Mieres, Asturias, Spain
| | - J Alonso
- IMIDRA, Finca "El Encín", 28800 Alcalá de Henares, Madrid, Spain
| | - D Baragaño
- INDUROT and Environmental Biotechnology & Geochemistry Group, University of Oviedo, C/Gonzalo Gutiérrez Quirós s/n, 33600 Mieres, Asturias, Spain
| | - J R Gallego
- INDUROT and Environmental Biotechnology & Geochemistry Group, University of Oviedo, C/Gonzalo Gutiérrez Quirós s/n, 33600 Mieres, Asturias, Spain
| | - M C Lobo
- IMIDRA, Finca "El Encín", 28800 Alcalá de Henares, Madrid, Spain
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Bartke S, Hagemann N, Harries N, Hauck J, Bardos P. Market potential of nanoremediation in Europe - Market drivers and interventions identified in a deliberative scenario approach. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 619-620:1040-1048. [PMID: 29734582 DOI: 10.1016/j.scitotenv.2017.11.215] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/18/2017] [Accepted: 11/18/2017] [Indexed: 06/08/2023]
Abstract
A deliberate expert-based scenario approach is applied to better understand the likely determinants of the evolution of the market for nanoparticles use in remediation in Europe until 2025. An initial set of factors had been obtained from a literature review and was complemented by a workshop and key-informant interviews. In further expert engaging formats - focus groups, workshops, conferences, surveys - this initial set of factors was condensed and engaged experts scored the factors regarding their importance for being likely to influence the market development. An interaction matrix was obtained identifying the factors being most active in shaping the market development in Europe by 2025, namely "Science-Policy-Interface" and "Validated information on nanoparticle application potential". Based on these, potential scenarios were determined and development of factors discussed. Conclusions are offered on achievable interventions to enhance nanoremediation deployment.
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Affiliation(s)
- Stephan Bartke
- UFZ - Helmholtz Centre for Environmental Research, Permoser Str. 15, 04318 Leipzig, Germany.
| | - Nina Hagemann
- UFZ - Helmholtz Centre for Environmental Research, Permoser Str. 15, 04318 Leipzig, Germany.
| | - Nicola Harries
- CL:AIRE, 32 Bloomsbury Street, London WC1B 3QJ, United Kingdom.
| | - Jennifer Hauck
- UFZ - Helmholtz Centre for Environmental Research, Permoser Str. 15, 04318 Leipzig, Germany.
| | - Paul Bardos
- R(3) Environmental Technology Ltd, H9 TOB1 University of Reading Earley Gate, Reading RG6 6AT, United Kingdom.
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Velimirovic M, Auffan M, Carniato L, Micić Batka V, Schmid D, Wagner S, Borschneck D, Proux O, von der Kammer F, Hofmann T. Effect of field site hydrogeochemical conditions on the corrosion of milled zerovalent iron particles and their dechlorination efficiency. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 618:1619-1627. [PMID: 29111242 DOI: 10.1016/j.scitotenv.2017.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/27/2017] [Accepted: 10/01/2017] [Indexed: 06/07/2023]
Abstract
Milled zerovalent iron (milled ZVI) particles have been recognized as a promising agent for groundwater remediation because of (1) their high reactivity with chlorinated aliphatic hydrocarbons, organochlorine pesticides, organic dyes, and a number of inorganic contaminants, and (2) a possible greater persistance than the more extensively investigated nanoscale zerovalent iron. We have used laboratory-scale batch degradation experiments to investigate the effect that hydrogeochemical conditions have on the corrosion of milled ZVI and on its ability to degrade trichloroethene (TCE). The observed pseudo first-order degradation rate constants indicated that the degradation of TCE by milled ZVI is affected by groundwater chemistry. The apparent corrosion rates of milled ZVI particles were of the same order of magnitude for hydrogeochemical conditions representative for two contaminated field sites (133-140mmolkg-1day-1, indicating a milled ZVI life-time of 128-135days). Sulfate enhances milled ZVI reactivity by removing passivating iron oxides and hydroxides from the Fe0 surface, thus increasing the number of reactive sites available. The organic matter content of 1.69% in the aquifer material tends to suppress the formation of iron corrosion precipitates. Results from scanning electron microscopy, X-ray diffraction, and iron K-edge X-ray adsorption spectroscopy suggest that the corrosion mechanisms involve the partial dissolution of particles followed by the formation and surface precipitation of magnetite and/or maghemite. Numerical corrosion modeling revealed that fitting iron corrosion rates and hydrogen inhibitory terms to hydrogen and pH measurements in batch reactors can reduce the life-time of milled ZVI particles by a factor of 1.2 to 1.7.
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Affiliation(s)
- Milica Velimirovic
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria
| | - Melanie Auffan
- Aix-Marseille Univ, CNRS, IRD, Coll de France, CEREGE, Aix en Provence, France
| | - Luca Carniato
- Department of Water Resources, Delft University of Technology, Delft, The Netherlands
| | - Vesna Micić Batka
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria
| | - Doris Schmid
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria
| | - Stephan Wagner
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria; Helmholtz-Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Daniel Borschneck
- Aix-Marseille Univ, CNRS, IRD, Coll de France, CEREGE, Aix en Provence, France
| | - Olivier Proux
- Observatoire des Sciences de l'Univers de Grenoble (OSUG), UMS 832 CNRS, Univ. Grenoble Alpes, F-38041 Grenoble, France
| | - Frank von der Kammer
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria
| | - Thilo Hofmann
- University of Vienna, Department of Environmental Geosciences and Environmental Science Research Network, Althanstraße 14, 1090 Vienna, Austria.
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10
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Gillies G, Raj R, Kopinke FD, Georgi A. Suspension stability and mobility of Trap-Ox Fe-zeolites for in-situ nanoremediation. J Colloid Interface Sci 2017; 501:311-320. [DOI: 10.1016/j.jcis.2017.04.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/11/2017] [Accepted: 04/11/2017] [Indexed: 10/19/2022]
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11
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Gil-Díaz M, Alonso J, Rodríguez-Valdés E, Gallego JR, Lobo MC. Comparing different commercial zero valent iron nanoparticles to immobilize As and Hg in brownfield soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 584-585:1324-1332. [PMID: 28190571 DOI: 10.1016/j.scitotenv.2017.02.011] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 02/02/2017] [Accepted: 02/02/2017] [Indexed: 06/06/2023]
Abstract
Nanoscale zero valent iron (nZVI) particles obtained by different methods differ in their structure, which lead to different reactivity, and therefore a likely difference in the remediation efficiency. The present study compares the effectiveness of three commercial ZVI nanoparticles to immobilize As and Hg in two soils (A and B) collected from a brownfield highly contaminated by mining and metallurgy activities. Scarce data are available on the effectiveness of nZVI for Hg immobilization in soil. Two commercial nZVI slurries from Toda (RNIP and RNIP-D) and one from Nano Iron (25S) were used at different doses (1, 5 and 10%). The metal(loid) availability and mobility was evaluated with the TCLP test and Tessier extraction procedure. The influence of nZVI application on As and Hg speciation was also evaluated as well as its impact on soil pH, electrical conductivity and soil phytotoxicity to vetch germination. The three commercial nZVI particles significantly reduced As and Hg availability in the two soils studied, which led to a decrease in soil phytotoxicity. At the dose of 5% of nZVI a decrease of exchangeable-As higher than 70% was observed for both soils, whereas in the case of Hg, a higher dose of nZVI (10%) was necessary to achieve reductions of exchangeable-Hg between 63 and 90% depending on the type of nZVI and soil. No impact on soil pH and electrical conductivity was observed. The effectiveness of metal(loid) immobilization depended on type of nZVI, soil properties and metal(loid) characteristics. Nanoparticles from Nano Iron showed better results for As immobilization whereas RNIP nanoparticles were more effective for Hg. Overall, 25S at the dose of 5% resulted more effective than RNIP nanoparticles for the reduction of exchangeable-As (in the range of 6-14%), whereas RNIP and RNIP-D were 10 and 13% more effective, respectively, for the reduction of exchangeable-Hg at the dose of 10% in soil B. Thus, nZVI can be used for the remediation of highly As and Hg polluted soils, although previous experiments at lab scale are necessary to determine the most viable type of nZVI and its dose.
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Affiliation(s)
- M Gil-Díaz
- IMIDRA, Finca "El Encín", Alcalá de Henares, Madrid, Spain.
| | - J Alonso
- IMIDRA, Finca "El Encín", Alcalá de Henares, Madrid, Spain
| | | | - J R Gallego
- Universidad de Oviedo, Mieres, Asturias, Spain
| | - M C Lobo
- IMIDRA, Finca "El Encín", Alcalá de Henares, Madrid, Spain
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Fan D, O'Carroll DM, Elliott DW, Xiong Z, Tratnyek PG, Johnson RL, Garcia AN. Selectivity of Nano Zerovalent Iron in
In Situ
Chemical Reduction: Challenges and Improvements. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/rem.21481] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dimin Fan
- Office of Land and Emergency Management of the USEPA
| | - Denis M. O'Carroll
- School of Civil and Environmental Engineering and Connective Waters Initiative, University of New South Wales, Sydney, Australia
| | | | | | - Paul G. Tratnyek
- Division of Environmental and Biomolecular Systems, Oregon Health & Science University, Portland, Oregon
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