51
|
Gil-Díaz M, Pinilla P, Alonso J, Lobo MC. Viability of a nanoremediation process in single or multi-metal(loid) contaminated soils. JOURNAL OF HAZARDOUS MATERIALS 2017; 321:812-819. [PMID: 27720472 DOI: 10.1016/j.jhazmat.2016.09.071] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/13/2016] [Accepted: 09/29/2016] [Indexed: 06/06/2023]
Abstract
The effectiveness of single- and multi-metal(loid) immobilization of As, Cd, Cr, Pb and Zn using different doses of nanoscale zero-valent iron (nZVI) was evaluated and compared in two different soils, a calcareous and an acidic one. The effectiveness of nZVI to immobilize metal(loid)s in soil strongly depended on the metal characteristics, soil properties, dose of nZVI and presence of other metal(loid)s. In the case of single contamination, this nanoremediation strategy was effective for all of the metal(loid)s studied except for Cd. When comparing the two soils, anionic metal(loid)s (As and Cr) were more easily retained in acidic soil, whereas cationic metal(loid)s (Cd, Pb and Zn), were immobilized more in calcareous soil. In multi-metal(loid) contaminated soils, the presence of several metal(loid)s affected their immobilization, which was probably due to the competitive phenomenon between metal(loid) ions, which can reduce their sorption or produce synergistic effects. At 10% of nZVI, As, Cr and Pb availability decreased more than 82%, for Zn it ranged between 31 and 75% and for Cd between 13 and 42%. Thus, the application of nZVI can be a useful strategy to immobilize As, Cr, Pb and Zn in calcareous or acidic soils in both single- or multi-metal(loid) contamination conditions.
Collapse
Affiliation(s)
- M Gil-Díaz
- IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, 28800, Madrid, Spain.
| | - P Pinilla
- IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, 28800, Madrid, Spain
| | - J Alonso
- IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, 28800, Madrid, Spain
| | - M C Lobo
- IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares, 28800, Madrid, Spain
| |
Collapse
|
52
|
Chen A, Shang C, Shao J, Zhang J, Huang H. The application of iron-based technologies in uranium remediation: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 575:1291-1306. [PMID: 27720254 DOI: 10.1016/j.scitotenv.2016.09.211] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 09/25/2016] [Accepted: 09/26/2016] [Indexed: 06/06/2023]
Abstract
Remediating uranium contamination is of worldwide interest because of the increasing release of uranium from mining and processing, nuclear power leaks, depleted uranium components in weapons production and disposal, and phosphate fertilizer in agriculture activities. Iron-based technologies are attractive because they are highly efficient, inexpensive, and readily available. This paper provides an overview of the current literature that addresses the application of iron-based technologies in the remediation of sites with elevated uranium levels. The application of iron-based materials, the current remediation technologies and mechanisms, and the effectiveness and environmental safety considerations of these approaches were discussed. Because uranium can be reduced and reoxidized in the environment, the review also proposes strategies for long-term in situ remediation of uranium. Unfortunately, iron-based materials (nanoscale zerovalent iron and iron oxides) can be toxic to microorganisms. As such, further studies exploring the links among the fates, ecological impacts, and other environmentally relevant factors are needed to better understand the constraints on using iron-based technologies for remediation.
Collapse
Affiliation(s)
- Anwei Chen
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Cui Shang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Jihai Shao
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China.
| | - Jiachao Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| | - Hongli Huang
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, PR China
| |
Collapse
|
53
|
Kong L, Zhu Y, Wang M, Li Z, Tan Z, Xu R, Tang H, Chang X, Xiong Y, Chen D. Simultaneous reduction and adsorption for immobilization of uranium from aqueous solution by nano-flake Fe-SC. JOURNAL OF HAZARDOUS MATERIALS 2016; 320:435-441. [PMID: 27585276 DOI: 10.1016/j.jhazmat.2016.08.060] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/24/2016] [Accepted: 08/23/2016] [Indexed: 06/06/2023]
Abstract
Uranium containing radioactive wastewater is seriously hazardous to the natural environment if it is being discharged directly. Herein, nano-flake like Fe loaded sludge carbon (Fe-SC) is synthesized by carbothermal process from Fe-rich sludge waste and applied in the immobilization of uranium in aqueous. Batch isotherm and kinetic adsorption experiments are adopted to investigate the adsorption behavior of Fe-SC to uranium in aqueous. XPS analyses were conducted to evaluate the immobilized mechanism. It was found that the carbonized temperature played significant role in the characteristics and immobilization ability of the resulted Fe-SC. The Fe-SC-800 carbonized at 800°C takes more advantageous ability in immobilization of uranium from aqueous than the commercial available AC and powder zero valent iron. The adsorption behavior could be fitted well with the Langmuir isotherm adsorption model and pseudo-second order model. The equilibrium adsorption amount and rate for Fe-SC-800 is high to 148.99mgg-1 and 0.015gmg-1min-1, respectively. Both reductive precipitation and physical adsorption are the main mechanisms of immobilization of uranium from aqueous by Fe-SC-800.
Collapse
Affiliation(s)
- Lingjun Kong
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Yuting Zhu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Min Wang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Zhixuan Li
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Zhicong Tan
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Ruibin Xu
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Hongmei Tang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Xiangyang Chang
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China
| | - Ya Xiong
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Diyun Chen
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, PR China; Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou University, Guangzhou, 510275, PR China.
| |
Collapse
|
54
|
Li S, Wang XM. Fly-ash-based magnetic coagulant for rapid sedimentation of electronegative slimes and ultrafine tailings. POWDER TECHNOL 2016. [DOI: 10.1016/j.powtec.2016.09.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
55
|
Yang YF, Cheng YH, Liao CM. In situ remediation-released zero-valent iron nanoparticles impair soil ecosystems health: A C. elegans biomarker-based risk assessment. JOURNAL OF HAZARDOUS MATERIALS 2016; 317:210-220. [PMID: 27281168 DOI: 10.1016/j.jhazmat.2016.05.070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 05/19/2016] [Accepted: 05/22/2016] [Indexed: 06/06/2023]
Abstract
There is considerable concern over the potential ecotoxicity to soil ecosystems posed by zero-valent iron nanoparticles (Fe(0) NPs) released from in situ environmental remediation. However, a lack of quantitative risk assessment has hampered the development of appropriate testing methods used in environmental applications. Here we present a novel, empirical approach to assess Fe(0) NPs-associated soil ecosystems health risk using the nematode Caenorhabditis elegans as a model organism. A Hill-based dose-response model describing the concentration-fertility inhibition relationships was constructed. A Weibull model was used to estimate thresholds as a guideline to protect C. elegans from infertility when exposed to waterborne or foodborne Fe(0) NPs. Finally, the risk metrics, exceedance risk (ER) and risk quotient (RQ) of Fe(0) NPs in various depths and distances from remediation sites can then be predicted. We showed that under 50% risk probability (ER=0.5), upper soil layer had the highest infertility risk (95% confidence interval: 13.18-57.40%). The margins of safety and acceptable criteria for soil ecosystems health for using Fe(0) NPs in field scale applications were also recommended. Results showed that RQs are larger than 1 in all soil layers when setting a stricter threshold of ∼1.02mgL(-1) of Fe(0) NPs. This C. elegans biomarker-based risk model affords new insights into the links between widespread use of Fe(0) NPs and environmental risk assessment and offers potential environmental implications of metal-based NPs for in situ remediation.
Collapse
Affiliation(s)
- Ying-Fei Yang
- Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, 10617, Taiwan, ROC
| | - Yi-Hsien Cheng
- Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, 10617, Taiwan, ROC
| | - Chung-Min Liao
- Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei, 10617, Taiwan, ROC.
| |
Collapse
|
56
|
Jing C, Li YL, Landsberger S. Review of soluble uranium removal by nanoscale zero valent iron. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2016; 164:65-72. [PMID: 27423075 DOI: 10.1016/j.jenvrad.2016.06.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/11/2016] [Accepted: 06/12/2016] [Indexed: 06/06/2023]
Abstract
Uranium (U) has been released to surface soil and groundwater through military and industrial activities. Soluble forms of U transferred to drinking water sources and food supplements can potentially threaten humans and the biosphere due to its chemical toxicity and radioactivity. The immobilization of aqueous U onto iron-based minerals is one of the most vital geochemical processes controlling the transport of U. As a consequence, much research has been focused on the use of iron-based materials for the treatment of U contaminated waters. One material currently being tested is nanoscale zero-valent iron (nZVI). However, understanding the removal mechanism of U onto nZVI is crucial to develop new technologies for contaminated water resources. This review article aims to provide information on the removal mechanism of U onto nZVI under different conditions (pH, U concentration, solution ion strength, humic acid, presence of O2 and CO2, microorganism effect) pertinent to environmental and engineered systems, and to provide risk or performance assessment results with the stability of nZVI products after removal of U in environmental restoration.
Collapse
Affiliation(s)
- C Jing
- School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan, Hubei 430074, China; Nuclear Engineering Teaching Lab, University of Texas at Austin, 10100 Burnet Road, Austin, TX 78712, USA
| | - Y L Li
- School of Environmental Studies, China University of Geosciences, 388 Lumo Road, Wuhan, Hubei 430074, China
| | - S Landsberger
- Nuclear Engineering Teaching Lab, University of Texas at Austin, 10100 Burnet Road, Austin, TX 78712, USA.
| |
Collapse
|
57
|
Xu C, Zhang B, Wang Y, Shao Q, Zhou W, Fan D, Bandstra JZ, Shi Z, Tratnyek PG. Effects of Sulfidation, Magnetization, and Oxygenation on Azo Dye Reduction by Zerovalent Iron. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:11879-11887. [PMID: 27684600 DOI: 10.1021/acs.est.6b03184] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Applications of zerovalent iron (ZVI) for water treatment under aerobic conditions include sequestration of metals (e.g., in acid mine drainage) and decolorization of dyes (in wastewaters from textile manufacturing). The processes responsible for contaminant removal can be a complex mixture of reduction, oxidation, sorption, and coprecipitation processes, which are further complicated by the dynamics of oxygen intrusion, mixing, and oxide precipitation. To better understand such systems, the removal of an azo dye (Orange I) by micron-sized granular ZVI at neutral pH was studied in open (aerobic) stirred batch reactors, by measuring the kinetics of Orange I decolorization and changes in "geochemical" properties (DO, Fe(II), and Eh), with and without two treatments that might improve the long-term performance of this system: sulfidation by pretreatment with sulfide and magnetization by application of a weak magnetic field (WMF). The results show that the changes in solution chemistry are coupled to the dynamics of oxygen intrusion, which was modeled as analogous to dissolved oxygen sag curves. Both sulfidation and magnetization increased Orange I removal rates 2.4-71.8-fold, but there was little synergistic benefit to applying both enhancements together. Respike experiments showed that the enhancement from magnetization carries over from magnetization to sulfidation, but not the reverse.
Collapse
Affiliation(s)
- Chunhua Xu
- School of Environmental Science and Engineering, Shandong University , Jinan, Shandong 250100, P.R. China
| | - Bingliang Zhang
- School of Environmental Science and Engineering, Shandong University , Jinan, Shandong 250100, P.R. China
| | - Yahao Wang
- School of Environmental Science and Engineering, Shandong University , Jinan, Shandong 250100, P.R. China
| | - Qianqian Shao
- School of Environmental Science and Engineering, Shandong University , Jinan, Shandong 250100, P.R. China
| | - Weizhi Zhou
- School of Environmental Science and Engineering, Shandong University , Jinan, Shandong 250100, P.R. China
| | - Dimin Fan
- Office of Superfund Remediation and Technology Innovation, U.S. Environmental Protection Agency , Arlington, Virginia 22202, United States
| | - Joel Z Bandstra
- School of Sciences, Saint Francis University , 117 Evergreen Drive, Loretto, Pennsylvania 15940, United States
| | - Zhenqing Shi
- School of Environment and Energy South China, University of Technology, Guangzhou , Guangdong 510006, P.R. China
| | - Paul G Tratnyek
- Institute of Environmental Health, Oregon Health & Science University , 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, United States
| |
Collapse
|
58
|
Xiao Z, Yuan M, Yang B, Liu Z, Huang J, Sun D. Plant-mediated synthesis of highly active iron nanoparticles for Cr (VI) removal: Investigation of the leading biomolecules. CHEMOSPHERE 2016; 150:357-364. [PMID: 26921588 DOI: 10.1016/j.chemosphere.2016.02.056] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 12/15/2015] [Accepted: 02/12/2016] [Indexed: 05/24/2023]
Abstract
The eco-friendly synthesis and application of Fe nanoparticles (Fe NPs) with higher activity and stability has aroused wide attention in the field of pollutant remediation. In this work, 15 plants extracts were selected for the plant-mediated synthesis of Fe NPs. The as-synthesized particles' morphology and structure were characterized by transmission electron microscopy, X-ray diffraction and UV-Vis spectroscopy. The contents of four main active biomolecules in the 15 extracts were determined, and comparative studies were further carried out to clarify the key component closely related to the reducing capacity. The results demonstrate that polyphenol is the leading ingredient involved in the biosynthesis of Fe NPs. Then Fe products synthesized by three extracts with distinct content of polyphenol were employed to remove Cr (VI) in the aqueous solution, indicating that the activity of the Fe NPs for Cr (VI) removal is consistent with the reducing capacity of the extracts. Furthermore, the Fe NPs synthesized by S. jambos(L.) Alston extract (SJA-Fe NPs) showed significant removal capacity of Cr(VI) with 698.6 mg Cr(VI) per g of iron.
Collapse
Affiliation(s)
- Zhengli Xiao
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China
| | - Min Yuan
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China
| | - Bin Yang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China
| | - Zhaoyan Liu
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China
| | - Jiale Huang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China
| | - Daohua Sun
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Fujian Provincial Key Laboratory of Chemical Biology, Xiamen University, Xiamen 361005, China.
| |
Collapse
|
59
|
Sun Z, Yang L, Chen KF, Chen GW, Peng YP, Chen JK, Suo G, Yu J, Wang WC, Lin CH. Nano zerovalent iron particles induce pulmonary and cardiovascular toxicity in an in vitro human co-culture model. Nanotoxicology 2016; 10:881-90. [DOI: 10.3109/17435390.2015.1133861] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Zhelin Sun
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China,
- School of Life Sciences, Shanghai University, Shanghai, China,
| | - Lingyan Yang
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China,
| | - Ku-Fan Chen
- Department of Civil Engineering, National Chi Nan University, Nantou, Taiwan,
| | - Guan-Wen Chen
- Department of Food and Beverage Management, Taipei College of Maritime Technology, Taipei, Taiwan,
| | - Yen-Ping Peng
- Department of Environmental Science and Engineering, Tunghai University, Taichung, Taiwan,
| | - Jen-Kun Chen
- Institute of Biomedical Engineering & Nanomedicine, National Health Research Institutes, Miaoli, Taiwan,
| | - Guangli Suo
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China,
| | - Jiantao Yu
- Key Laboratory of Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China,
| | - Wen-Cheng Wang
- Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan, and
| | - Chia-Hua Lin
- Department of Biotechnology, National Formosa University, Yunlin, Taiwan
| |
Collapse
|
60
|
Temiz K, Olmez-Hanci T, Arslan-Alaton I. Zero-valent iron-activated persulfate oxidation of a commercial alkyl phenol polyethoxylate. ENVIRONMENTAL TECHNOLOGY 2016; 37:1757-1767. [PMID: 26797469 DOI: 10.1080/09593330.2015.1131751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Aqueous Triton X-45 (TX-45; 20 mg/L; original total organic carbon (TOC) = 14 mg/L), a representative, commercially important alkylphenol polyethoxylate, was subjected to persulfate (PS) oxidation activated with zero-valent iron (ZVI) nanoparticles. After optimization of the ZVI/PS treatment combination (1 g/L ZVI; 2.5 mM PS at pH5) in terms of pH (3-9), ZVI (0.5-5 g/L) and PS (0.5-5.0 mM) concentrations, TX-45 could be efficiently (>90%) degraded within short treatment periods (<60 min) accompanied with significant (>40%) TOC removals. The degree of PS consumption and Fe release was also followed during the experiments and a positive correlation existed between enhanced TX-45 removals and ZVI-activated PS consumption rates accompanied with a parallel Fe release. Acute toxicity tests were conducted using two different bioassays to examine the toxicological safety of the ZVI/PS oxidation system. Acute toxicity profiles significantly decreased from an original value of 66% relative inhibition to 21% and from 16% relative inhibition to non-toxic values according to Vibrio fischeri and Pseudokirchneriella subcapitata bioassays, respectively. The photobacterium V. fischeri appeared to be more sensitive to TX-45 and its degradation products than the microalgae P. subcapitata.
Collapse
Affiliation(s)
- Kubra Temiz
- a Department of Environmental Engineering, School of Civil Engineering , Istanbul Technical University , Istanbul , Turkey
| | - Tugba Olmez-Hanci
- a Department of Environmental Engineering, School of Civil Engineering , Istanbul Technical University , Istanbul , Turkey
| | - Idil Arslan-Alaton
- a Department of Environmental Engineering, School of Civil Engineering , Istanbul Technical University , Istanbul , Turkey
| |
Collapse
|
61
|
Schöftner P, Waldner G, Lottermoser W, Stöger-Pollach M, Freitag P, Reichenauer TG. Electron efficiency of nZVI does not change with variation of environmental parameters. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 535:69-78. [PMID: 26006053 DOI: 10.1016/j.scitotenv.2015.05.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 05/08/2015] [Accepted: 05/08/2015] [Indexed: 06/04/2023]
Abstract
Nanoscale zero-valent iron particles (nZVI) are already applied for in-situ dechlorination of halogenated organic contaminants in the field. We performed batch experiments whereby trichloroethene (TCE) was dehalogenated by nZVI under different environmental conditions that are relevant in practice. The tested conditions include different ionic strengths, addition of polyelectrolytes (carboxymethylcellulose and ligninsulphonate), lowered temperature, dissolved oxygen and different particle contents. Particle properties were determined by Mössbauer spectroscopy, XRD, TEM, SEM, AAS and laser obscuration time measurements. TCE dehalogenation and H2 evolution were decelerated by reduced ionic strength, addition of polyelectrolytes, temperature reduction, the presence of dissolved oxygen and reduced particle content. The partitioning of released electrons between reactions with the contaminant vs. with water (selectivity) was low, independent of the tested conditions. Basically out of hundred electrons that were released via nZVI oxidation only 3.1±1.4 were used for TCE dehalogenation. Even lower selectivities were observed at TCE concentrations below 3.5 mg l(-1), hence particle modifications and/or combination of nZVI with other remediation technologies seem to be necessary to reach target concentrations for remediation. Our results suggest that selectivity is particle intrinsic and not as much condition dependent, hence particle synthesis and potential particle modifications of nZVI particles may be more important for optimization of the pollutant degradation rate, than tested environmental conditions.
Collapse
Affiliation(s)
- Philipp Schöftner
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria.
| | - Georg Waldner
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria
| | - Werner Lottermoser
- Salzburg University, FB Materialforschung und Physik, Hellbrunnerstr. 34, 5020 Salzburg, Austria.
| | - Michael Stöger-Pollach
- Technical University of Vienna, Universitäre Service-Einrichtung für Transmissionselektronenmikroskopie - USTEM.
| | - Peter Freitag
- Keller Grundbau Ges. mbH, Mariahilfer Straße 127a, 1150 Vienna, Austria.
| | - Thomas G Reichenauer
- AIT Austrian Institute of Technology GmbH, Konrad-Lorenz-Straße 24, 3430 Tulln a.d. Donau, Austria.
| |
Collapse
|
62
|
Machado S, Pacheco JG, Nouws HPA, Albergaria JT, Delerue-Matos C. Characterization of green zero-valent iron nanoparticles produced with tree leaf extracts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 533:76-81. [PMID: 26151651 DOI: 10.1016/j.scitotenv.2015.06.091] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 06/22/2015] [Accepted: 06/22/2015] [Indexed: 06/04/2023]
Abstract
In the last decades nanotechnology has become increasingly important because it offers indisputable advantages to almost every area of expertise, including environmental remediation. In this area the synthesis of highly reactive nanomaterials (e.g. zero-valent iron nanoparticles, nZVI) is gaining the attention of the scientific community, service providers and other stakeholders. The synthesis of nZVI by the recently developed green bottom-up method is extremely promising. However, the lack of information about the characteristics of the synthetized particles hinders a wider and more extensive application. This work aims to evaluate the characteristics of nZVI synthesized through the green method using leaves from different trees. Considering the requirements of a product for environmental remediation the following characteristics were studied: size, shape, reactivity and agglomeration tendency. The mulberry and pomegranate leaf extracts produced the smallest nZVIs (5-10 nm), the peach, pear and vine leaf extracts produced the most reactive nZVIs while the ones produced with passion fruit, medlar and cherry extracts did not settle at high nZVI concentrations (931 and 266 ppm). Considering all tests, the nZVIs obtained from medlar and vine leaf extracts are the ones that could present better performances in the environmental remediation. The information gathered in this paper will be useful to choose the most appropriate leaf extracts and operational conditions for the application of the green nZVIs in environmental remediation.
Collapse
Affiliation(s)
- S Machado
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - J G Pacheco
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - H P A Nouws
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| | - J T Albergaria
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal.
| | - C Delerue-Matos
- REQUIMTE/LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4200-072 Porto, Portugal
| |
Collapse
|
63
|
Shi Z, Fan D, Johnson RL, Tratnyek PG, Nurmi JT, Wu Y, Williams KH. Methods for characterizing the fate and effects of nano zerovalent iron during groundwater remediation. JOURNAL OF CONTAMINANT HYDROLOGY 2015; 181:17-35. [PMID: 25841976 DOI: 10.1016/j.jconhyd.2015.03.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 02/26/2015] [Accepted: 03/09/2015] [Indexed: 05/20/2023]
Abstract
The emplacement of nano zerovalent iron (nZVI) for groundwater remediation is usually monitored by common measurements such as pH, total iron content, and oxidation-reduction potential (ORP) by potentiometry. However, the interpretation of such measurements can be misleading because of the complex interactions between the target materials (e.g., suspensions of highly reactive and variably aggregated nanoparticles) and aquifer materials (sediments and groundwater), and multiple complications related to sampling and detection methods. This paper reviews current practice for both direct and indirect characterizations of nZVI during groundwater remediation and explores prospects for improving these methods and/or refining the interpretation of these measurements. To support our recommendations, results are presented based on laboratory batch and column studies of nZVI detection using chemical, electrochemical, and geophysical methods. Chemical redox probes appear to be a promising new method for specifically detecting nZVI, based on laboratory tests. The potentiometric and voltammetric detections of iron nanoparticles, using traditional stationary disc electrodes, rotating disc electrodes, and flow-through cell disc electrodes, provide insight for interpreting ORP measurements, which are affected by solution chemistry conditions and the interactions between iron nanoparticles and the electrode surface. The geophysical methods used for characterizing ZVI during groundwater remediation are reviewed and its application for nZVI detection is assessed with results of laboratory column experiments.
Collapse
Affiliation(s)
- Zhenqing Shi
- School of Environment and Energy, South China University of Technology, Guangzhou, Guangdong 510006, PR China.
| | - Dimin Fan
- Institute of Environmental Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, United States
| | - Richard L Johnson
- Institute of Environmental Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, United States
| | - Paul G Tratnyek
- Institute of Environmental Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, United States.
| | - James T Nurmi
- Engineering Science Department, Clackamas Community College, 19600 Molalla Ave., Oregon City, OR 97045, United States
| | - Yuxin Wu
- Earth Sciences Division, Lawrence Berkeley National Laboratory, #1 Cyclotron Road, MS 74R0316C, Berkeley, CA 94720, United States
| | - Kenneth H Williams
- Earth Sciences Division, Lawrence Berkeley National Laboratory, #1 Cyclotron Road, MS 74R0316C, Berkeley, CA 94720, United States
| |
Collapse
|
64
|
Li ZJ, Wang L, Yuan LY, Xiao CL, Mei L, Zheng LR, Zhang J, Yang JH, Zhao YL, Zhu ZT, Chai ZF, Shi WQ. Efficient removal of uranium from aqueous solution by zero-valent iron nanoparticle and its graphene composite. JOURNAL OF HAZARDOUS MATERIALS 2015; 290:26-33. [PMID: 25734531 DOI: 10.1016/j.jhazmat.2015.02.028] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 01/23/2015] [Accepted: 02/09/2015] [Indexed: 06/04/2023]
Abstract
Zero-valent iron nanoparticle (ZVI-np) and its graphene composites were prepared and applied in the removal of uranium under anoxic conditions. It was found that solutions containing 24 ppm U(VI) could be completely cleaned up by ZVI-nps, regardless of the presence of NaHCO3, humic acid, mimic groundwater constituents or the change of solution pH from 5 to 9, manifesting the promising potential of this reactive material in permeable reactive barrier (PRB) to remediate uranium-contaminated groundwater. In the measurement of maximum sorption capacity, removal efficiency of uranium kept at 100% until C0(U) = 643 ppm, and the saturation sorption of 8173 mg U/g ZVI-nps was achieved at C0(U) = 714 ppm. In addition, reaction mechanisms were clarified based on the results of SEM, XRD, XANES, and chemical leaching in (NH4)2CO3 solution. Partially reductive precipitation of U(VI) as U3O7 was prevalent when sufficient iron was available; nevertheless, hydrolysis precipitation of U(VI) on surface would be predominant as iron got insufficient, characterized by releases of Fe(2+) ions. The dissolution of Fe(0) cores was assigned to be the driving force of continuous formation of U(VI) (hydr)oxide. The incorporation of graphene supporting matrix was found to facilitate faster removal rate and higher U(VI) reduction ratio, thus benefitting the long-term immobilization of uranium in geochemical environment.
Collapse
Affiliation(s)
- Zi-Jie Li
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Lin Wang
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Yong Yuan
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Cheng-Liang Xiao
- School of Radiological and Interdisciplinary Sciences (RAD-X), and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Lei Mei
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Li-Rong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Jing Zhang
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing100049, China
| | - Ju-Hua Yang
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Liang Zhao
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen-Tai Zhu
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Zhi-Fang Chai
- School of Radiological and Interdisciplinary Sciences (RAD-X), and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China.
| | - Wei-Qun Shi
- Key Laboratory of Nuclear Radiation and Nuclear Energy Technology and Key Laboratory For Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
| |
Collapse
|
65
|
Habuda-Stanić M, Nujić M. Arsenic removal by nanoparticles: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:8094-123. [PMID: 25791264 DOI: 10.1007/s11356-015-4307-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 03/02/2015] [Indexed: 05/21/2023]
Abstract
Contamination of natural waters with arsenic, which is both toxic and carcinogenic, is widespread. Among various technologies that have been employed for arsenic removal from water, such as coagulation, filtration, membrane separation, ion exchange, etc., adsorption offers many advantages including simple and stable operation, easy handling of waste, absence of added reagents, compact facilities, and generally lower operation cost, but the need for technological innovation for water purification is gaining attention worldwide. Nanotechnology is considered to play a crucial role in providing clean and affordable water to meet human demands. This review presents an overview of nanoparticles and nanobased adsorbents and its efficiencies in arsenic removal from water. The paper highlights the application of nanomaterials and their properties, mechanisms, and advantages over conventional adsorbents for arsenic removal from contaminated water.
Collapse
Affiliation(s)
- Mirna Habuda-Stanić
- Josip Juraj Strossmayer University of Osijek, Faculty of Food Technology Osijek, Mirna Habuda-Stanić, Franje Kuhača 20, 31000, Osijek, Croatia,
| | | |
Collapse
|
66
|
Hwang Y, Kim D, Shin HS. Inhibition of nitrate reduction by NaCl adsorption on a nano-zero-valent iron surface during a concentrate treatment for water reuse. ENVIRONMENTAL TECHNOLOGY 2015; 36:1178-1187. [PMID: 25358487 DOI: 10.1080/09593330.2014.982723] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanoscale zero-valent iron (NZVI) has been considered as a possible material to treat water and wastewater. However, it is necessary to verify the effect of the matrix components in different types of target water. In this study, different effects depending on the sodium chloride (NaCl) concentration on reductions of nitrates and on the characteristics of NZVI were investigated. Although NaCl is known as a promoter of iron corrosion, a high concentration of NaCl (>3 g/L) has a significant inhibition effect on the degree of NZVI reactivity towards nitrate. The experimental results were interpreted by a Langmuir-Hinshelwood-Hougen-Watson reaction in terms of inhibition, and the decreased NZVI reactivity could be explained by the increase in the inhibition constant. As a result of a chloride concentration analysis, it was verified that 7.7-26.5% of chloride was adsorbed onto the surface of NZVI. Moreover, the change of the iron corrosion product under different NaCl concentrations was investigated by a surface analysis of spent NZVI. Magnetite was the main product, with a low NaCl concentration (0.5 g/L), whereas amorphous iron hydroxide was observed at a high concentration (12 g/L). Though the surface was changed to permeable iron hydroxide, the Fe(0) in the core was not completely oxidized. Therefore, the inhibition effect of NaCl could be explained as the competitive adsorption of chloride and nitrate.
Collapse
Affiliation(s)
- Yuhoon Hwang
- a Department of Environmental Engineering , Technical University of Denmark , Miljøvej, Building 113, Lyngby 2800 , Denmark
| | | | | |
Collapse
|
67
|
Jarošová B, Filip J, Hilscherová K, Tuček J, Šimek Z, Giesy JP, Zbořil R, Bláha L. Can zero-valent iron nanoparticles remove waterborne estrogens? JOURNAL OF ENVIRONMENTAL MANAGEMENT 2015; 150:387-392. [PMID: 25567735 DOI: 10.1016/j.jenvman.2014.12.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 11/30/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
Steroidal estrogens are one of the most challenging classes of hazardous contaminants as they can cause adverse effects to biota in extremely low concentrations. They emerge in both waste waters and surface waters serving as a source of drinking water. Environmental Quality Standards for 17β-estradiol (E2) and 17α-ethinylestradiol (EE2), promulgated within the EU Water Framework Directive, are 0.4 and 0.035 ng L(-1), respectively. Because nanoscale zero-valent iron (nZVI) particles have been previously used in numerous remediation technologies and have the advantage of possible magnetic separation, interaction of nZVI with E2 and EE2 in water was investigated to assess the potential role of nZVI in removing steroidal estrogens. A mixture of E2 and EE2 dissolved in water was shaken with varying doses of nZVI for 1-5 h. Concentration-dependent removal of the estrogens was observed but removal did not increase significantly with time. Concentrations of the estrogens were determined by HPLC/MS/MS and a biodetection reporter gene assay. Sorption and nonspecific oxygen-mediated oxidation of estrogens were identified as the most probable removal mechanisms. Two independent experiments confirmed that significant decrease of estrogens concentration is achieved when at least 2 g L(-1) of nZVI is applied. The presented study provides insights into the mechanisms of nZVI interaction with steroidal estrogens under aerobic conditions prevailing in currently applied water treatment technologies.
Collapse
Affiliation(s)
- Barbora Jarošová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
| | - Jan Filip
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science, Palacký University in Olomouc, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic.
| | - Klára Hilscherová
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
| | - Jiří Tuček
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science, Palacký University in Olomouc, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Šimek
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
| | - John P Giesy
- University of Saskatchewan, Department of Veterinary Biomedical Sciences and Toxicology Centre, 44 Campus Drive, Saskatoon, SK S7N 5B3, Canada; Department of Biology & Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Kowloon, Hong Kong, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Departments of Physical Chemistry and Experimental Physics, Faculty of Science, Palacký University in Olomouc, 17. listopadu 1192/12, CZ-771 46 Olomouc, Czech Republic
| | - Luděk Bláha
- Research Centre for Toxic Compounds in the Environment (RECETOX), Masaryk University, Kamenice 5, CZ-62500 Brno, Czech Republic
| |
Collapse
|
68
|
Girit B, Dursun D, Olmez-Hanci T, Arslan-Alaton I. Treatment of aqueous bisphenol A using nano-sized zero-valent iron in the presence of hydrogen peroxide and persulfate oxidants. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2015; 71:1859-1868. [PMID: 26067507 DOI: 10.2166/wst.2015.175] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Bisphenol A (BPA) is an industrial pollutant considered as one of the major endocrine-disrupting chemicals found in natural waters. In the present study, the use of a commercial, air-stable, zero-valent iron (ZVI) powder, consisting of Fe0 surface stabilized nanoparticles was examined for the treatment of 20 mg/L, aqueous BPA solutions. The influence of pH (3, 5, 7), addition of hydrogen peroxide (HP) and persulfate (PS) oxidants (0.0, 1.25 and 2.5 mM) as well as temperature (25 and 50 °C) was studied for BPA treatment with 1 g/L ZVI. ZVI coupled with HP or PS provided an effective treatment system, which was based on rapid ZVI-mediated decomposition of the above-mentioned oxidants, resulting in complete BPA as well as significant total organic carbon (TOC) (88%) removals, in particular when PS was employed as the oxidant. Increasing the PS concentration and reaction temperature dramatically enhanced PS decomposition and BPA removal rates, whereas HP was not very effective in TOC removals and at elevated temperatures. According to the bioassays conducted with Vibrio fischeri and Pseudokirchneriella subcapitata, the acute toxicity of aqueous BPA fluctuated at first but decreased appreciably at the end of ZVI/PS treatment.
Collapse
Affiliation(s)
- B Girit
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey E-mail:
| | - D Dursun
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey E-mail:
| | - T Olmez-Hanci
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey E-mail:
| | - I Arslan-Alaton
- Department of Environmental Engineering, School of Civil Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey E-mail:
| |
Collapse
|
69
|
Chen MY, Su YF, Shih YH. Effect of geochemical properties on degradation of trichloroethylene by stabilized zerovalent iron nanoparticle with Na-acrylic copolymer. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2014; 144:88-92. [PMID: 24929499 DOI: 10.1016/j.jenvman.2014.04.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 04/22/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
Stable nanoscale zero-valent iron (NZVI) particles have been developed to remediate chlorinated compounds. The degradation kinetics and efficiency of trichloroethylene (TCE) by a commercial stabilized NZVI with Na-acrylic copolymer (acNZVI) were investigated and compared with those by laboratory-synthesized NZVI and carboxymethyl cellulose (CMC)-stabilized NZVI particles. Results show that the degradation of TCE by acNZVI was faster than that by NZVI and CMC-NZVI. Increase in temperature enhanced the degradation rate and efficiency of TCE with acNZVI. The activation energy of TCE degradation by acNZVI was estimated to be 23 kJ/mol. The degradation rate constants of TCE decreased from 0.064 to 0.026 min(-1) with decrease in initial pH from 9.03 to 4.23. Common groundwater anions including NO3(-), Cl(-), HCO3(-), and SO4(2-) inhibited slightly the degradation efficiencies of TCE by acNZVI. The Na-acrylic copolymer-stabilized NZVI, which exhibited high degradation kinetics and efficiency, could be a good remediation agent for chlorinated organic compounds.
Collapse
Affiliation(s)
- Meng-yi Chen
- Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC
| | - Yuh-fan Su
- Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC.
| | - Yang-hsin Shih
- Department of Agricultural Chemistry, National Taiwan University, Taipei 106, Taiwan, ROC.
| |
Collapse
|
70
|
Su Y, Adeleye AS, Huang Y, Sun X, Dai C, Zhou X, Zhang Y, Keller AA. Simultaneous removal of cadmium and nitrate in aqueous media by nanoscale zerovalent iron (nZVI) and Au doped nZVI particles. WATER RESEARCH 2014; 63:102-111. [PMID: 24999115 DOI: 10.1016/j.watres.2014.06.008] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/06/2014] [Accepted: 06/08/2014] [Indexed: 06/03/2023]
Abstract
Nanoscale zerovalent iron (nZVI) has demonstrated high efficacy for treating nitrate or cadmium (Cd) contamination, but its efficiency for simultaneous removal of nitrate and Cd has not been investigated. This study evaluated the reactivity of nZVI to the co-contaminants and by-product formation, employed different catalysts to reduce nitrite yield from nitrate, and examined the transformation of nZVI after reaction. Nitrate reduction resulted in high solution pH, negatively charged surface of nZVI, formation of Fe3O4 (a stable transformation of nZVI), and no release of ionic iron. Increased pH and negative charge contributed to significant increase in Cd(II) removal capacity (from 40 mg/g to 188 mg/g) with nitrate present. In addition, nitrate reduction by nZVI could be catalyzed by Cd(II): while 30% of nitrate was reduced by nZVI within 2 h in the absence of Cd(II), complete nitrate reduction was observed in the presence of 40 mg-Cd/L due to the formation of Cd islands (Cd(0) and CdO) on the nZVI particles. While nitrate was reduced mostly to ammonium when Cd(II) was not present or at Cd(II) concentrations ≥ 40 mg/L, up to 20% of the initial nitrate was reduced to nitrite at Cd(II) concentrations < 40 mg/L. Among nZVI particles doped with 1 wt. % Cu, Ag, or Au, nZVI deposited with 1 wt. % Au reduced nitrite yield to less than 3% of the initial nitrate, while maintaining a high Cd(II) removal capacity.
Collapse
Affiliation(s)
- Yiming Su
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA
| | - Adeyemi S Adeleye
- Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA
| | - Yuxiong Huang
- Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA
| | - Xiaoya Sun
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Chaomeng Dai
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; College of Civil Engineering, Tongji University, Shanghai 200092, China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze Water Environment for Ministry of Education, Tongji University, Shanghai 200092, China.
| | - Arturo A Keller
- Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA.
| |
Collapse
|
71
|
Kim HS, Ahn JY, Kim C, Lee S, Hwang I. Effect of anions and humic acid on the performance of nanoscale zero-valent iron particles coated with polyacrylic acid. CHEMOSPHERE 2014; 113:93-100. [PMID: 25065795 DOI: 10.1016/j.chemosphere.2014.04.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 04/14/2014] [Accepted: 04/16/2014] [Indexed: 06/03/2023]
Abstract
Effects of anions (NO3(-), HCO3(-), Cl(-), SO4(2-)) and humic acid on the reactivity and core/shell chemistries of polyacrylic acid-coated nanoscale zero-valent iron (PAA-NZVI) and inorganically modified NZVI (INORG-NZVI) particles were investigated. The reactivity tests under various ion concentrations (0.2-30mN) revealed the existence of a favorable molar ratio of anion/NZVI that increased the reactivity of NZVI particles. The presence of a relatively small amount of humic acid (0.5mgL(-1)) substantially decreased the INORG-NZVI reactivity by 76%, whereas the reactivity of PAA-NZVI decreased only by 12%. The XRD and TEM results supported the role of the PAA coating of PAA-NZVI in impeding the oxidation of the Fe(0) core by groundwater solutes. This protective role provided by the organic coating also resulted in a 2.3-fold increase in the trichloroethylene (TCE) reduction capacity of PAA-NZVI compared to that of INORG-NZVI in the presence of anions/humic acid. Ethylene and ethane were simultaneously produced as the major reduction products of TCE in both NZVI systems, suggesting that a hydrodechlorination occurred without the aid of metallic catalysts. The PAA coating, originally designed to improve the mobility of NZVI, enhanced TCE degradation performances of NZVI in the presence of anions and humic acid.
Collapse
Affiliation(s)
- Hong-Seok Kim
- Research & Development Division, Hyundai Engineering & Construction Co., Ltd., 17-5, Mabukno 240-gil, Giheung-gu, Yongin-si, Gyeonggi-do 446-912, Republic of Korea
| | - Jun-Young Ahn
- School of Civil and Environmental Engineering, Pusan National University, 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Cheolyong Kim
- School of Civil and Environmental Engineering, Pusan National University, 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea
| | - Seockheon Lee
- Center for Water Resource Cycle, Korea Institute of Science and Technology, Hwarangdo 14-gil 5, Seongbuk-gu, Seoul 136-791, Republic of Korea
| | - Inseong Hwang
- School of Civil and Environmental Engineering, Pusan National University, 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea.
| |
Collapse
|
72
|
Datta KKR, Petala E, Datta KJ, Perman JA, Tucek J, Bartak P, Otyepka M, Zoppellaro G, Zboril R. NZVI modified magnetic filter paper with high redox and catalytic activities for advanced water treatment technologies. Chem Commun (Camb) 2014; 50:15673-6. [DOI: 10.1039/c4cc06241h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
73
|
Su Y, Adeleye AS, Zhou X, Dai C, Zhang W, Keller AA, Zhang Y. Effects of nitrate on the treatment of lead contaminated groundwater by nanoscale zerovalent iron. JOURNAL OF HAZARDOUS MATERIALS 2014; 280:504-513. [PMID: 25209830 DOI: 10.1016/j.jhazmat.2014.08.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/31/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
Nanoscale zerovalent iron (nZVI) is efficient for removing Pb(2+) and nitrate from water. However, the influence of nitrate, a common groundwater anion, on Pb(2+) removal by nZVI is not well understood. In this study, we showed that under excess Fe(0) conditions (molar ratio of Fe(0)/nitrate>4), Pb(2+) ions were immobilized more quickly (<5 min) than in nitrate-free systems (∼ 15 min) due to increasing pH. With nitrate in excess (molar ratio of Fe(0)/nitrate<4), nitrate stimulated the formation of crystal PbxFe3-xO4 (ferrite), which provided additional Pb(2+) removal. However, ∼ 7% of immobilized Pb(2+) ions were released into aqueous phase within 2h due to ferrite deformation. Oxidation-reduction potential (ORP) values below -600 mV correlated with excess Fe(0) conditions (complete Pb(2+) immobilization), while ORP values ≥-475 mV characterized excess nitrate conditions (ferrite process and Pb(2+) release occurrence). This study indicates that ORP monitoring is important for proper management of nZVI-based remediation in the subsurface to avoid lead remobilization in the presence of nitrate.
Collapse
Affiliation(s)
- Yiming Su
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA
| | - Adeyemi S Adeleye
- Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Chaomeng Dai
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; College of Civil Engineering, Tongji University, Shanghai 200092, China
| | - Weixian Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China
| | - Arturo A Keller
- Bren School of Environmental Science & Management, University of California, Santa Barbara, 3420 Bren Hall, CA 93106, USA; University of California Center for Environmental Implications of Nanotechnology, Santa Barbara, CA, USA.
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China.
| |
Collapse
|
74
|
Toxic metal immobilization in contaminated sediment using bentonite- and kaolinite-supported nano zero-valent iron. JOURNAL OF NANOPARTICLE RESEARCH 2014. [DOI: 10.1007/s11051-014-2548-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
75
|
Liang W, Dai C, Zhou X, Zhang Y. Application of zero-valent iron nanoparticles for the removal of aqueous zinc ions under various experimental conditions. PLoS One 2014; 9:e85686. [PMID: 24416439 PMCID: PMC3887099 DOI: 10.1371/journal.pone.0085686] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 12/06/2013] [Indexed: 11/30/2022] Open
Abstract
Application of zero-valent iron nanoparticles (nZVI) for Zn2+ removal and its mechanism were discussed. It demonstrated that the uptake of Zn2+ by nZVI was efficient. With the solids concentration of 1 g/L nZVI, more than 85% of Zn2+ could be removed within 2 h. The pH value and dissolved oxygen (DO) were the important factors of Zn2+ removal by nZVI. The DO enhanced the removal efficiency of Zn2+. Under the oxygen-contained condition, oxygen corrosion gave the nZVI surface a shell of iron (oxy)hydroxide, which could show high adsorption affinity. The removal efficiency of Zn2+ increased with the increasing of the pH. Acidic condition reduced the removal efficiency of Zn2+ by nZVI because the existing H+ inhibited the formation of iron (oxy)hydroxide. Adsorption and co-precipitation were the most likely mechanism of Zn2+ removal by nZVI. The FeOOH-shell could enhance the adsorption efficiency of nZVI. The removal efficiency and selectivity of nZVI particles for Zn2+ were higher than Cd2+. Furthermore, a continuous flow reactor for engineering application of nZVI was designed and exhibited high removal efficiency for Zn2+.
Collapse
Affiliation(s)
- Wen Liang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, China
| | - Chaomeng Dai
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, China
- College of Civil Engineering, Tongji University, Shanghai, China
- * E-mail: (CD); (YZ)
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, China
| | - Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai, China
- * E-mail: (CD); (YZ)
| |
Collapse
|
76
|
Gil-Díaz M, Alonso J, Rodríguez-Valdés E, Pinilla P, Lobo MC. Reducing the mobility of arsenic in brownfield soil using stabilised zero-valent iron nanoparticles. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2014; 49:1361-1369. [PMID: 25072767 DOI: 10.1080/10934529.2014.928248] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The use of nanoscale zero-valent iron (nZVI) as a new tool for the treatment of polluted soils and groundwater has received considerable attention in recent years due to its high reactivity, in situ application and cost-effectiveness. The objectives of this study were to investigate the effectiveness of using a commercial stabilised suspension of nZVI to immobilise As in brownfield soil and to investigate its impact on Fe availability in the treated soil. The phytotoxicities of the soil samples were also evaluated using a germination test with two plant species: barley (Hordeum vulgare L) and common vetch (Vicia sativa L). Two doses of the commercial nZVI suspension were studied, 1% and 10%, and two soil-nanoparticle interaction times, 72 h and 3 mo, were used to compare the stabilities of the soils treated with nZVI. The As availability was evaluated using a sequential extraction procedure and the toxicity characteristics leaching procedure (TCLP) test. The application of nZVI significantly decreased the availability of As in the soil. The immobilisation of As was more effective and more stable over time with the 10% dose than with the 1% dose of the commercial nZVI suspension. The application of nZVI did not induce an important increase in Fe mobility because the Fe leachability was less than 2 mg L(-1) over the time period studied. The lower availability of As in the soil led to a decrease in the phytotoxicity of the soil to barley and vetch germination. Thus, the proposed nanotechnology could be a potential alternative for the in situ remediation of As-polluted soils and could be combined with remediation processes where plants are involved.
Collapse
Affiliation(s)
- Mar Gil-Díaz
- a IMIDRA, Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentación, Finca "El Encín", Alcalá de Henares , Madrid , Spain
| | | | | | | | | |
Collapse
|
77
|
Chen WF, Pan L, Chen LF, Wang Q, Yan CC. Dechlorination of hexachlorobenzene by nano zero-valent iron/activated carbon composite: iron loading, kinetics and pathway. RSC Adv 2014. [DOI: 10.1039/c4ra06760f] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
HCB was removed by nano ZVI/AC composite by both adsorption and dechlorination. The dechlorination was stepwise, for which a pathway is proposed.
Collapse
Affiliation(s)
- Wei-fang Chen
- School of Environment and Architecture
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| | - Ling Pan
- School of Environment and Architecture
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| | - Li-fang Chen
- College of Marine Science and Engineering
- School of Tianjin University of Science and Technology
- Tianjin 300457, China
| | - Qiong Wang
- School of Environment and Architecture
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| | - Chang-cheng Yan
- School of Environment and Architecture
- University of Shanghai for Science and Technology
- Shanghai 200093, China
| |
Collapse
|
78
|
Zhang Y, Su Y, Zhou X, Dai C, Keller AA. A new insight on the core-shell structure of zerovalent iron nanoparticles and its application for Pb(II) sequestration. JOURNAL OF HAZARDOUS MATERIALS 2013; 263 Pt 2:685-93. [PMID: 24231326 DOI: 10.1016/j.jhazmat.2013.10.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 10/12/2013] [Accepted: 10/16/2013] [Indexed: 05/26/2023]
Abstract
Nanoscale zerovalent iron (nZVI) has shown a high efficacy for removing heavy metals from liquid solution. However, its removal capacity has not been fully explored due to its common shell composition (FeOOH). In this study, a much higher removal capacity of Pb(II) is observed (1667 mg Pb(II)/gFe), which is over 100% higher than the highest removal capacity of nZVI reported before. High-resolution X-ray photoelectron spectroscopy (HR-XPS) reveals that through restricting the dehydration process of Fe(OH)3, nZVI can acquire a unique shell, which is composed of 45.5% Fe(OH)3 and 54.5% FeOOH. The presence of Fe(OH)3 suppresses the reduction of Pb(II), but greatly promotes the co-precipitation and adsorption of Pb(II). Combining the ratio of Fe-released to Pb-immobilized and the result of HR-XPS, a reaction between Fe(0) core, Fe(OH)3, and Pb(II) is proposed. The Fe released from the Fe(0) core leads to the core depletion, observed by transmission electron microscopy (TEM) under high Pb(II) loading. While temperature has little influence on the removal capacity, pH affects the removal capacity greatly. pH<4.5 favors Fe dissolution, while pH>4.5 promotes Pb(II) adsorption. Given the high Pb removal capacity via the Fe(OH)3 shell, nZVI can be used to remedy Pb(II) contamination.
Collapse
Affiliation(s)
- Yalei Zhang
- State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze Water Environment for Ministry of Education, Tongji University, Shanghai 200092, China.
| | | | | | | | | |
Collapse
|
79
|
Hwang Y, Shin HS. Effects on nano zero-valent iron reactivity of interactions between hardness, alkalinity, and natural organic matter in reverse osmosis concentrate. J Environ Sci (China) 2013; 25:2177-2184. [PMID: 24552045 DOI: 10.1016/s1001-0742(12)60323-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanoscale zero-valent iron (NZVI) is considered to have potential to reduce nitrate in the concentrate generated by high pressure membrane processes aimed at water reuse. However, it is necessary to verify the effect of the matrix components in the concentrates on NZVI reactivity. In this study, the influence of hardness, alkalinity, and organic matter on NZVI reactivity was evaluated by the response surface method (RSM). Hardness (Ca2+) had a positive effect on NZVI reactivity by accelerating iron corrosion. In contrast, alkalinity (bicarbonate; HCO-3) and organic matter (humic acid; HA) had negative effects on NZVI reactivity due to morphological change to carbonate green rust, and to competitive adsorption of HA, respectively. The validity of the statistical prediction model derived from RSM was confirmed by an additional confirmation experiment, and the experimental result was within the 95% confidential interval. Therefore, it can be indicated that the RSM model produced results that were statistically significant.
Collapse
Affiliation(s)
- Yuhoon Hwang
- Department of Environmental Engineering, Technical University of Denmark, MiljoFvej, Building 113, DK-2800 Kgs. Lyngby, Denmark.
| | - Hang-Sik Shin
- Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Korea
| |
Collapse
|
80
|
Kim JS, Chung KW, Lee HI, Yoon HS, Kumar JR. Leaching behavior of uranium and vanadium using strong sulfuric acid from Korean black shale ore. J Radioanal Nucl Chem 2013. [DOI: 10.1007/s10967-013-2732-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
81
|
Biosorption behaviors of uranium (VI) from aqueous solution by sunflower straw and insights of binding mechanism. J Radioanal Nucl Chem 2013. [DOI: 10.1007/s10967-013-2613-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
82
|
Kim C, Ahn JY, Ngoc TH, Kim HS, Jun SC, Hwang I. Characterization of the Transport of Zero-Valent Iron Nanoparticles in an Aquifer for Application of Reactive Zone Technology. ACTA ACUST UNITED AC 2013. [DOI: 10.7857/jsge.2013.18.3.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
83
|
|
84
|
Kumar N, Millot R, Battaglia-Brunet F, Négrel P, Diels L, Rose J, Bastiaens L. Sulfur and oxygen isotope tracing in zero valent iron based In situ remediation system for metal contaminants. CHEMOSPHERE 2013; 90:1366-1371. [PMID: 23000047 DOI: 10.1016/j.chemosphere.2012.07.060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 07/25/2012] [Accepted: 07/26/2012] [Indexed: 06/01/2023]
Abstract
In the present study, controlled laboratory column experiments were conducted to understand the biogeochemical changes during the microbial sulfate reduction. Sulfur and oxygen isotopes of sulfate were followed during sulfate reduction in zero valent iron incubated flow through columns at a constant temperature of 20±1°C for 90 d. Sulfur isotope signatures show considerable variation during biological sulfate reduction in our columns in comparison to abiotic columns where no changes were observed. The magnitude of the enrichment in δ(34)S values ranged from 9.4‰ to 10.3‰ compared to initial value of 2.3‰, having total fractionation δS between biotic and abiotic columns as much as 6.1‰. Sulfur isotope fractionation was directly proportional to the sulfate reduction rates in the columns. Oxygen isotopes in this experiment seem less sensitive to microbial activities and more likely to be influenced by isotopic exchange with ambient water. A linear relationship is observed between δ(34)S and δ(18)O in biotic conditions and we also highlight a good relationship between δ(34)S and sulfate reduction rate in biotic columns.
Collapse
Affiliation(s)
- Naresh Kumar
- BRGM, Metrology Monitoring Analysis Department, Orléans, France.
| | | | | | | | | | | | | |
Collapse
|
85
|
The Effect of Vacuum Annealing of Magnetite and Zero-Valent Iron Nanoparticles on the Removal of Aqueous Uranium. JOURNAL OF NANOTECHNOLOGY 2013. [DOI: 10.1155/2013/173625] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
As-formed and vacuum annealed zero-valent iron nanoparticles (nano-Fe0) and magnetite nanoparticles (nano-Fe3O4) were tested for the removal of uranium from carbonate-rich mine water. Nanoparticles were introduced to batch systems containing the mine water under oxygen conditions representative of near-surface waters, with a uranyl solution studied as a simple comparator system. Despite the vacuum annealed nano-Fe0having a 64.6% lower surface area than the standard nano-Fe0, similar U removal (>98%) was recorded during the initial stages of reaction with the mine water. In contrast, ≤15% U removal was recorded for the mine water treated with both as-formed and vacuum annealed nano-Fe3O4. Over extended reaction periods (>1 week), appreciable U rerelease was recorded for the mine water solutions treated using nano-Fe0, whilst the vacuum annealed material maintained U at <50 μg L−1until 4 weeks reaction. XPS analysis of reacted nanoparticulate solids confirmed the partial chemical reduction ofUVItoUIVin both nano-Fe0water treatment systems, but with a greater amount ofUIVdetected on the vacuum annealed particles. Results suggest that vacuum annealing can enhance the aqueous reactivity of nano-Fe0and, for waters of complex chemistry, can improve the longevity of aqueous U removal.
Collapse
|
86
|
Zhuang Y, Jin L, Luthy RG. Kinetics and pathways for the debromination of polybrominated diphenyl ethers by bimetallic and nanoscale zerovalent iron: effects of particle properties and catalyst. CHEMOSPHERE 2012; 89:426-32. [PMID: 22732301 PMCID: PMC3408778 DOI: 10.1016/j.chemosphere.2012.05.078] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 04/08/2012] [Accepted: 05/16/2012] [Indexed: 05/13/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are recognized as a new class of widely-distributed and persistent contaminants for which effective treatment and remediation technologies are needed. In this study, two kinds of commercially available nanoscale Fe(0) slurries (Nanofer N25 and N25S), a freeze-dried laboratory-synthesized Fe(0) nanoparticle (nZVI), and their palladized forms were used to investigate the effect of particle properties and catalyst on PBDE debromination kinetics and pathways. Nanofers and their palladized forms were found to debrominate PBDEs effectively. The laboratory-synthesized Fe(0) nanoparticles also debrominated PBDEs, but were slower due to deactivation by the freeze-drying and stabilization processes in the laboratory synthesis. An organic modifier, polyacrylic acid (PAA), bound on N25S slowed PBDE debromination by a factor of three to four compared to N25. The activity of palladized nZVI (nZVI/Pd) was optimized at 0.3 Pd/Fe wt% in our system. N25 could debrominate selected environmentally-abundant PBDEs, including BDE 209, 183, 153, 99, and 47, to end products di-BDEs, mono-BDEs and diphenyl ether (DE) in one week, while nZVI/Pd (0.3 Pd/Fe wt%) mainly resulted in DE as a final product. Step-wise major PBDE debromination pathways by unamended and palladized Fe(0) are described and compared. Surface precursor complex formation is an important limiting factor for palladized Fe(0) reduction as demonstrated by PBDE pathways where steric hindrance and rapid sequential debromination of adjacent bromines play an important role.
Collapse
Affiliation(s)
| | | | - Richard G. Luthy
- Corresponding author phone: (650) 721-2615; fax: (650) 725-9720;
| |
Collapse
|
87
|
Crane RA, Scott TB. Nanoscale zero-valent iron: future prospects for an emerging water treatment technology. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:112-25. [PMID: 22305041 DOI: 10.1016/j.jhazmat.2011.11.073] [Citation(s) in RCA: 453] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 11/20/2011] [Accepted: 11/21/2011] [Indexed: 05/20/2023]
Abstract
For the past 15 years, nanoscale metallic iron (nZVI) has been investigated as a new tool for the treatment of contaminated water and soil. The technology has reached commercial status in many countries worldwide, however is yet to gain universal acceptance. This review summarises our contemporary knowledge of nZVI aqueous corrosion, manufacture and deployment, along with methods to enhance particle reactivity, stability and subsurface mobility. Reasons for a lack of universal acceptance are also explored. Key factors include: concerns over the long-term fate, transformation and ecotoxicity of nZVI in environmental systems and, a lack of comparable studies for different nZVI materials and deployment strategies. It is highlighted that few investigations to date have examined systems directly analogous to the chemistry, biology and architecture of the terrestrial environment. Such emerging studies have highlighted new concerns, including the prospect for remobilisation of heavy metals and radionuclides over extended periods. The fundamental importance of being able to accurately predict the long-term physical, chemical and biological fate of contaminated sites following nZVI treatment is emphasised and, as part of this, a universal empirical testing framework for nZVI is suggested.
Collapse
Affiliation(s)
- R A Crane
- Interface Analysis Centre, University of Bristol, 121 St. Michael's Hill, Bristol BS2 8BS, UK
| | | |
Collapse
|
88
|
Zboril R, Andrle M, Oplustil F, Machala L, Tucek J, Filip J, Marusak Z, Sharma VK. Treatment of chemical warfare agents by zero-valent iron nanoparticles and ferrate(VI)/(III) composite. JOURNAL OF HAZARDOUS MATERIALS 2012; 211-212:126-130. [PMID: 22119195 DOI: 10.1016/j.jhazmat.2011.10.094] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Revised: 10/28/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
Nanoscale zero-valent iron (nZVI) particles and a composite containing a mixture of ferrate(VI) and ferrate(III) were prepared by thermal procedures. The phase compositions, valence states of iron, and particle sizes of iron-bearing compounds were determined by combination of X-ray powder diffraction, Mössbauer spectroscopy and scanning electron microscopy. The applicability of these environmentally friendly iron based materials in treatment of chemical warfare agents (CWAs) has been tested with three representative compounds, sulfur mustard (bis(2-chlorethyl) sulfide, HD), soman ((3,3'-imethylbutan-2-yl)-methylphosphonofluoridate, GD), and O-ethyl S-[2-(diisopropylamino)ethyl] methylphosphonothiolate (VX). Zero-valent iron, even in the nanodimensional state, had a sluggish reactivity with CWAs, which was also observed in low degrees of CWAs degradation. On the contrary, ferrate(VI)/(III) composite exhibited a high reactivity and complete degradations of CWAs were accomplished. Under the studied conditions, the estimated first-order rate constants (≈ 10(-2)s(-1)) with the ferrate(VI)/(III) composite were several orders of magnitude higher than those of spontaneous hydrolysis of CWAs (10(-8)-10(-6)s(-1)). The results demonstrated that the oxidative technology based on application of ferrate(VI) is very promising to decontaminate CWAs.
Collapse
Affiliation(s)
- Radek Zboril
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, 17. listopadu 1192/12, 771 46 Olomouc, Czech Republic.
| | | | | | | | | | | | | | | |
Collapse
|
89
|
Lerner RN, Lu Q, Zeng H, Liu Y. The effects of biofilm on the transport of stabilized zerovalent iron nanoparticles in saturated porous media. WATER RESEARCH 2012; 46:975-85. [PMID: 22209258 DOI: 10.1016/j.watres.2011.11.070] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 11/23/2011] [Accepted: 11/25/2011] [Indexed: 05/10/2023]
Abstract
The transport of stabilized zerovalent iron nanoparticles (nZVI) has recently been the topic of extensive research due to its proven potential as an in situ remediation tool. However, these studies have ignored the effects of biofilms-complex aggregations of bacterial cells and excreted extracellular polymeric substances present in nearly all aquatic systems-on the transport of these particles. This study examines the effects of Pseudomonas aeruginosa (PAO1) biofilm, at a cell concentration similar to that reported for saturated aquifers, on the transport of commercially available, poly (acrylic acid) stabilized nZVI (pnZVI) in 14 cm long columns packed with saturated glass beads at salt concentrations of 1 and 25 mM NaCl. Compared to retention on uncoated columns, in the presence of biofilm the retention of pnZVI increased at higher ionic strength, while ionic strength played no role in retention of these nanoparticles in the absence of biofilm. The Tufenkji-Elimelech correlation equation predicts lower retention of pnZVI on biofilm coated columns compared to uncoated columns due to a lower Hamaker constant, and DLVO energy considerations predict the most favorable attachment to uncoated porous media at higher ionic strength. A steric (polymer-mediated) model that considers the combined influence of steric effects of polymers and DLVO interactions is shown to adequately describe particle retention in columns.
Collapse
Affiliation(s)
- Robert N Lerner
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB, Canada T6G 2W2
| | | | | | | |
Collapse
|
90
|
Baikousi M, Bourlinos AB, Douvalis A, Bakas T, Anagnostopoulos DF, Tuček J, Safářová K, Zboril R, Karakassides MA. Synthesis and characterization of γ-Fe2O3/carbon hybrids and their application in removal of hexavalent chromium ions from aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:3918-3930. [PMID: 22272746 DOI: 10.1021/la204006d] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Magnetic Fe(2)O(3)/carbon hybrids were prepared in a two-step process. First, acetic acid vapor interacted with iron cations dispersed on the surface of a nanocasted ordered mesoporous carbon (CMK-3). In the second step, the primarily created iron acetate species underwent pyrolysis and transformed to magnetic iron oxide nanoparticles. X-ray diffraction, Fourier-transform infrared, and Raman spectroscopies were used for the chemical and structural characterization of the hybrids, while surface area measurements, thermal analysis, and transmission electron microscopy were employed to determine their physical, surface, and textural properties. These results revealed the preservation of the host carbon structure, which was homogenously and controllably loaded (up to 27 wt %) with nanosized (ca. 20 nm) iron oxides inside the mesoporous system. Mössbauer spectroscopy and magnetic measurements at low temperatures confirmed the formation of γ-Fe(2)O(3) nanoparticles exhibiting superparamagnetic behavior. The kinetic studies showed a rapid removal of Cr(VI) ions from the aqueous solutions in the presence of these magnetic mesoporous hybrids and a considerably increased adsorption capacity per unit mass of sorbent in comparison to that of pristine CMK-3 carbon. The results also indicate highly pH-dependent sorption efficiency of the hybrids, whereas their kinetics was described by a pseudo-second-order kinetic model. Taking into account the simplicity of the synthetic procedure and possibility of magnetic separation of hybrids with immobilized pollutant, the developed mesoporous nanomaterials have quite real potential for applications in water treatment technologies.
Collapse
Affiliation(s)
- Maria Baikousi
- Department of Materials Science and Engineering, University of Ioannina, GR-45110 Ioannina, Greece
| | | | | | | | | | | | | | | | | |
Collapse
|
91
|
Ševců A, El-Temsah YS, Joner EJ, Černík M. Oxidative Stress Induced in Microorganisms by Zero-valent Iron Nanoparticles. Microbes Environ 2011; 26:271-81. [DOI: 10.1264/jsme2.me11126] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Alena Ševců
- Institute for Nanomaterials, Advanced Technologies and Innovations, Technical University of Liberec
| | | | | | - Miroslav Černík
- Institute for Nanomaterials, Advanced Technologies and Innovations, Technical University of Liberec
| |
Collapse
|