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Ahmad HA, Sun X, Wang Z, Ahmad S, El-Baz A, Lee T, Ni BJ, Ni SQ. Metagenomic unveils the promotion of mainstream PD-anammox process at lower nZVI concentration and inhibition at higher dosage. BIORESOURCE TECHNOLOGY 2024; 408:131168. [PMID: 39069143 DOI: 10.1016/j.biortech.2024.131168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/02/2024] [Accepted: 07/25/2024] [Indexed: 07/30/2024]
Abstract
The partial-denitrification-anammox (PdNA) process exhibits great potential in enabling the simultaneous removal of NO3--N and NH4+-N. This study delved into the impact of exogenous nano zero-valent iron (nZVI) on the PdNA process. Adding 10 mg L-1 of nZVI increased nitrogen removal efficiency up to 83.12 % and maintained higher relative abundances of certain beneficial bacteria. The maximum relative abundance of Candidatus Brocadia (1.6 %), Candidatus Kuenenia (1.5 %), Ignavibacterium (1.3 %), and Azospira (1.2 %) was observed at 10 mg L-1 of nZVI. However, the greatest relative abundance of Thauera (1.3 %) was recorded under 50 mg L-1. Moreover, applying nZVI selectively enhanced the abundance of NO3--N reductase genes. So, keeping the nZVI concentration at 10 mg L-1 or below is advisable to ensure a stable PdNA process in mainstream conditions. Considering nitrogen removal efficiency, using nZVI in the PD-anammox process could be more cost-effective in enhancing its adoption in industrial and mainstream settings.
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Affiliation(s)
- Hafiz Adeel Ahmad
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Xiaojie Sun
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Zhibin Wang
- School of Life Sciences, Shandong University, Qingdao, Shandong 266237, China
| | - Shakeel Ahmad
- Department of Soil and Environmental Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
| | - Amro El-Baz
- Environmental Engineering Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt
| | - Taeho Lee
- Department of Civil and Environmental Engineering, Pusan National University, Pusan 609-735, Republic of Korea
| | - Bing-Jie Ni
- School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - Shou-Qing Ni
- School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China.
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2
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Zeng G, He Y, Wang F, Luo H, Liang D, Wang J, Huang J, Yu C, Jin L, Sun D. Toxicity of Nanoscale Zero-Valent Iron to Soil Microorganisms and Related Defense Mechanisms: A Review. TOXICS 2023; 11:514. [PMID: 37368614 DOI: 10.3390/toxics11060514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/11/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023]
Abstract
Soil pollution is a global environmental problem. Nanoscale zero-valent iron (nZVI) as a kind of emerging remedial material is used for contaminated soil, which can quickly and effectively degrade and remove pollutants such as organic halides, nitrates and heavy metals in soil, respectively. However, nZVI and its composites can enter the soil environment in the application process, affect the physical and chemical properties of the soil, be absorbed by microorganisms and affect the growth and metabolism of microorganisms, thus affecting the ecological environment of the entire soil. Because of the potential risks of nZVI to the environment and ecosystems, this paper summarizes the current application of nZVI in the remediation of contaminated soil environments, summarizes the various factors affecting the toxic effects of nZVI particles and comprehensively analyzes the toxic effects of nZVI on microorganisms, toxic mechanisms and cell defense behaviors to provide a theoretical reference for subsequent biosafety research on nZVI.
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Grants
- 52103156,51901160 National Natural Science Foundation of China
- cstc2021jcyjmsxmX0663 Chongqing Science and Technology Commission Project
- CSTB2022NSCQ-MSX1145, cstc2021jcyjmsxmX0901, cstc2021jcyj-msxmX0559, CSTB2022BSXM-JCX0149, cstc2018jscx-zdyfxmX0001 Natural Science Foundation of Chongqing, China
- KJQN202001530, KJQN202103905, KJQN202101526, KJQN202103902 the Scientific and Technological Research Program of Chongqing Municipal Education Commis-sion
- YS2021089 Chongqing Bayu Scholars Young Scholars Project
- 2021198, 202211551007 College Students Innovation Training Program
- shljzyh2021-09 Provincial and Ministerial Co-constructive of Collaborative Innovation Center for MSW Compre-hensive Utilization
- YKJCX2220602 Postgraduate Innovation Program of Chongqing University of Science and Technology
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Affiliation(s)
- Guoming Zeng
- School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
- Intelligent Construction Technology Application Service Center, Chongqing City Vocational College, Chongqing 402160, China
| | - Yu He
- School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Fei Wang
- School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Heng Luo
- Geological Research Institute of No. 9 Oil Production Plant of CNPC Changqing Oilfield, Yinchuan 750006, China
| | - Dong Liang
- School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Jian Wang
- Chongqing Yubei District Ecological Environment Monitoring Station, Chongqing 401124, China
| | - Jiansheng Huang
- School of Architecture and Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| | - Chunyi Yu
- Department of Construction Management and Real Estate, Chongqing Jianzhu College, Chongqing 400072, China
| | - Libo Jin
- National & Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution, Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Institute of Life Sciences, Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
| | - Da Sun
- National & Local Joint Engineering Research Center for Ecological Treatment Technology of Urban Water Pollution, Zhejiang Provincial Key Laboratory for Water Environment and Marine Biological Resources Protection, Institute of Life Sciences, Biomedical Collaborative Innovation Center of Zhejiang Province, Wenzhou University, Wenzhou 325035, China
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3
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Yeap CSY, Nguyen NHA, Spanek R, Too CC, Benes V, Provaznik J, Cernik M, Sevcu A. Dissolved iron released from nanoscale zero-valent iron (nZVI) activates the defense system in bacterium Pseudomonas putida, leading to high tolerance to oxidative stress. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129627. [PMID: 35872458 DOI: 10.1016/j.jhazmat.2022.129627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/03/2022] [Accepted: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Nanoscale zero-valent iron (nZVI) has increasingly been applied to remediate aquifers polluted by organochlorines or heavy metals. As a result, bacteria in the vicinity of remediate action can be stressed by surplus iron released from nZVI. However, the understanding of the iron stress defense pathways during this process is currently incomplete. Therefore, we aimed to elucidate the physiological and transcriptomic response of the bacterium, Pseudomonas putida NCTC 10936, to 100 mg/L of nZVI and 44.5 µg/L of dissolved iron obtained from nZVI suspension. Cell viability was neither affected by nZVI nor dissolved iron, although the dissolved iron caused stress that altered the cell physiology and caused the generation of smaller cells, whereas cells were elongated in the presence of nZVI. Transcriptomic analysis confirmed the observed stronger physiological effect caused by dissolved iron (in total 3839 differentially expressed genes [DEGs]) than by nZVI (945 DEGs). Dissolved iron (but not nZVI) activated genes involved in oxidative stress-related pathways, antioxidant activity, carbohydrate and energy metabolism, but downregulated genes associated with flagellar assembly proteins and two-component systems involved in sensing external stimuli. As a result, bacteria very effectively faced oxidative insults and cell viability was not affected.
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Affiliation(s)
- Cheryl S Y Yeap
- Institute for Nanomaterials Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 1409/7, 46117 Liberec 1, Czechia; Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17 Liberec 1, Czechia
| | - Nhung H A Nguyen
- Institute for Nanomaterials Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 1409/7, 46117 Liberec 1, Czechia
| | - Roman Spanek
- Institute for Nanomaterials Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 1409/7, 46117 Liberec 1, Czechia; Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17 Liberec 1, Czechia
| | - Chin Chin Too
- Department of Biochemistry and Microbiology, Ghent University, K. L. Ledeganckstraat 35, Campus Ledeganck, 9000 Ghent, Belgium
| | - Vladimir Benes
- Genomics Core Facility, European Molecular Biology Laboratory of Heidelberg, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Jan Provaznik
- Genomics Core Facility, European Molecular Biology Laboratory of Heidelberg, Meyerhofstrasse 1, 69117 Heidelberg, Germany
| | - Miroslav Cernik
- Institute for Nanomaterials Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 1409/7, 46117 Liberec 1, Czechia
| | - Alena Sevcu
- Institute for Nanomaterials Advanced Technologies and Innovation, Technical University of Liberec, Bendlova 1409/7, 46117 Liberec 1, Czechia; Faculty of Science, Humanities and Education, Technical University of Liberec, Studentská 2, 461 17 Liberec 1, Czechia.
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Vanzetto GV, Thomé A. Toxicity of nZVI in the growth of bacteria present in contaminated soil. CHEMOSPHERE 2022; 303:135002. [PMID: 35597456 DOI: 10.1016/j.chemosphere.2022.135002] [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: 02/22/2022] [Revised: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
The use of nano zero-valent iron (nZVI) for the remediation of degraded areas is a consolidated practice. However, the long-term reactions that occur in the environment remain unknown. This study aimed to evaluate the potential toxic effects on the growth of colony-forming units (CFUs) of Bacillus cereus and Pseudomona aeruginosa present in soil contaminated with hexavalent chromium (Cr6+) and pentachlorophenol (PCP) nanoremediated with nZVI. The treatments were natural soil (control), soil contaminated by Cr6+, soil contaminated by PCP, and soil contaminated by Cr6+ and PCP (Cr6+ and PCP), all in duplicate. The concentration of contaminants used was 100 mg/kg of soil. One of the drums of the duplicate received an injection of nZVI solution with a concentration of 50 g/kg. Analysis was performed 7, 15, 21, 30, 60, and 90 days after the nZVI injection. Temporary oscillations in the abundance of the microbiological community were observed, characterizing the adaptation of bacteria to the contaminants. The bacteria showed similar behavior. Ninety days after the injection of nZVI, the averages of the CFUs were statistically equal, with the lowest coefficient of variation and the highest concentration of CFUs occurring. The strains of B. cereus and P. aeruginosa were resistant to the concentrations of nZVI, Cr6+, and PCP. The nanoremediation of nZVI in soil contaminated by Cr6+ and PCP had no toxic effects on the population of the bacteria evaluated and did not present major disturbances in temperature, electrical conductivity, pH, and humidity over time.
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Affiliation(s)
| | - Antonio Thomé
- Professor Graduate Program in Engineering, University of Passo Fundo, Brazil
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5
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Semerád J, Ševců A, Nguyen NHA, Hrabák P, Špánek R, Bobčíková K, Pospíšková K, Filip J, Medřík I, Kašlík J, Šafařík I, Filipová A, Nosek J, Pivokonský M, Cajthaml T. Discovering the potential of an nZVI-biochar composite as a material for the nanobioremediation of chlorinated solvents in groundwater: Degradation efficiency and effect on resident microorganisms. CHEMOSPHERE 2021; 281:130915. [PMID: 34029963 DOI: 10.1016/j.chemosphere.2021.130915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/22/2021] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Abiotic and biotic remediation of chlorinated ethenes (CEs) in groundwater from a real contaminated site was studied using biochar-based composites containing nanoscale zero-valent iron (nZVI/BC) and natural resident microbes/specific CE degraders supported by a whey addition. The material represented by the biochar matrix decorated by isolated iron nanoparticles or their aggregates, along with the added whey, was capable of a stepwise dechlorination of CEs. The tested materials (nZVI/BC and BC) were able to decrease the original TCE concentration by 99% in 30 days. Nevertheless, regarding the transformation products, it was clear that biotic as well as abiotic transformation mechanisms were involved in the transformation process when nonchlorinated volatiles (i.e., methane, ethane, ethene, and acetylene) were detected after the application of nZVI/BC and nZVI/BC with whey. The whey addition caused a massive increase in bacterial biomass in the groundwater samples (monitored by 16S rRNA sequencing and qPCR) that corresponded with the transformation of trichloro- and dichloro-CEs, and this process was accompanied by the formation of less chlorinated products. Moreover, the biostimulation step also eliminated the adverse effect caused by nZVI/BC (decrease in microbial biomass after nZVI/BC addition). The nZVI/BC material or its aging products, and probably together with vinyl chloride-respiring bacteria, were able to continue the further reductive dechlorination of dichlorinated CEs into nonhalogenated volatiles. Overall, the results of the present study demonstrate the potential, feasibility, and environmental safety of this nanobioremediation approach.
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Affiliation(s)
- Jaroslav Semerád
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic
| | - Alena Ševců
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic.
| | - Nhung H A Nguyen
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Pavel Hrabák
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Roman Špánek
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Kateřina Bobčíková
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Kristýna Pospíšková
- Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Jan Filip
- Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Ivo Medřík
- Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Josef Kašlík
- Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic
| | - Ivo Šafařík
- Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, CZ-783 71, Olomouc, Czech Republic; Department of Nanobiotechnology, Biology Centre, ISB, CAS, Na Sadkach 7, 370 05, Ceske Budejovice, Czech Republic
| | - Alena Filipová
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic
| | - Jaroslav Nosek
- Technical University of Liberec, Studentská 2, CZ-461 17, Liberec, Czech Republic
| | - Martin Pivokonský
- Institute of Hydrodynamics of the Czech Academy of Sciences, Pod Patankou 30/5, CZ-166 12, Prague 6, Czech Republic
| | - Tomáš Cajthaml
- Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ-142 20, Prague 4, Czech Republic; Institute for Environmental Studies, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Prague 2, Czech Republic.
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6
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Lin J, Xue C, Guo S, Owens G, Chen Z. Effects of green synthesized and commercial nZVI on crystal violet degradation by Burkholderia vietnamiensis C09V: Dose-dependent toxicity and biocompatibility. CHEMOSPHERE 2021; 279:130612. [PMID: 34134414 DOI: 10.1016/j.chemosphere.2021.130612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 03/02/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
The increasingly common remedial application of nanoscale zero-valent iron (nZVI) to alleviate specific contaminant issues may inadvertently lead to nZVI accumulation in wastewater. This is a potential concern, because the effect of nZVI on the common microbes essential for wastewater biotreatment is not known. This is further complicated when there are many ways available to synthesize nZVI, which may interreact with bacteria differently. Thus, in this study, the different effects of nZVI synthesized by Eucalyptus leaves (EL-nZVI) and a commercially synthesized nZVI on the biodegradation of crystal violet by Burkholderia vietnamiensis C09V (B.V. C09V) was studied. At high dose (1000 mg/L), EL-nZVI and commercial nZVI both significantly inhibited the removal of crystal violet by B.V. C09V, decreasing removal rates by 10.5 and 13.1% respectively. Optical density (OD600) and soluble protein assays indicated that the growth of B.V. C09V improved under low doses (100 mg/L), but remained inhibited under high doses (500 and 1000 mg/L) of both commercial and EL-nZVI. Enzymes were also sensitive to nZVI, where the commercial variant exerted a greater effect on both the activity of lactate dehydrogenase (LDH) and superoxide dismutase (SOD) than EL-nZVI, indicating that EL-nZVI was less toxic than commercial nZVI. LIVE/DEAD staining also showed that the number of apoptotic cells was significantly higher when exposed to commercial nZVI rather than EL-nZVI. Furthermore, scanning electron microscopy (SEM) confirmed that direct contact between nZVI and cells at 1000 mg/L nZVI caused cell membrane disruption. Whereas, at 100 mg/L EL-nZVI, B.V. C09V grew better due to the formation of dense biofilms around the suspended EL-nZVI at a. Fourier transform infrared spectra (FTIR), confirmed an abundance of oxygen-containing functional groups on the surface of EL-nZVI which provided better biocompatibility than commercial nZVI. Overall, while dose was the most significant factor influencing nZVI toxicity, surface composition and morphology was also important. These new findings suggest chemical synthesis of metal nanoparticles should be replaced by biosynthetic routes to maintain viable microbial pollution during wastewater treatment.
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Affiliation(s)
- Jiajiang Lin
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China
| | - Chao Xue
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China
| | - Shen Guo
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Zuliang Chen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian Province, China.
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7
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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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8
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Malakar A, Kanel SR, Ray C, Snow DD, Nadagouda MN. Nanomaterials in the environment, human exposure pathway, and health effects: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143470. [PMID: 33248790 DOI: 10.1016/j.scitotenv.2020.143470] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/24/2020] [Accepted: 10/24/2020] [Indexed: 05/04/2023]
Abstract
Nanomaterials (NMs), both natural and synthetic, are produced, transformed, and exported into our environment daily. Natural NMs annual flux to the environment is around 97% of the total and is significantly higher than synthetic NMs. However, synthetic NMs are considered to have a detrimental effect on the environment. The extensive usage of synthetic NMs in different fields, including chemical, engineering, electronics, and medicine, makes them susceptible to be discharged into the atmosphere, various water sources, soil, and landfill waste. As ever-larger quantities of NMs end up in our environment and start interacting with the biota, it is crucial to understand their behavior under various environmental conditions, their exposure pathway, and their health effects on human beings. This review paper comprises a large portion of the latest research on NMs and the environment. The article describes the natural and synthetic NMs, covering both incidental and engineered NMs and their behavior in the natural environment. The review includes a brief discussion on sampling strategies and various analytical tools to study NMs in complex environmental matrices. The interaction of NMs in natural environments and their pathway to human exposure has been summarized. The potential of NMs to impact human health has been elaborated. The nanotoxicological effect of NMs based on their inherent properties concerning to human health is also reviewed. The knowledge gaps and future research needs on NMs are reported. The findings in this paper will be a resource for researchers working on NMs all over the world to understand better the challenges associated with NMs in the natural environment and their human health effects.
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Affiliation(s)
- Arindam Malakar
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA
| | - Sushil R Kanel
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA; Department of Chemistry, Wright State University, Dayton, OH 45435, USA.
| | - Chittaranjan Ray
- Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute 2021 Transformation Drive, University of Nebraska, Lincoln, NE 68588-0844, USA
| | - Daniel D Snow
- School of Natural Resources and Nebraska Water Center, part of the Robert B. Daugherty Water for Food Global Institute, 202 Water Sciences Laboratory, University of Nebraska, Lincoln, NE 68583-0844, USA
| | - Mallikarjuna N Nadagouda
- Department of Mechanical and Materials Engineering, Wright State University, 3640 Colonel Glenn Hwy., Dayton, OH 45435, USA
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9
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Crampon M, Hellal J, Mouvet C, Ollivier P. Degradation of tetrachloroethylene by zero valent iron nanoparticles in the presence of a natural groundwater bacterial biofilm in a sandy porous media. Heliyon 2021; 7:e05854. [PMID: 33474508 PMCID: PMC7803639 DOI: 10.1016/j.heliyon.2020.e05854] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/13/2020] [Accepted: 12/22/2020] [Indexed: 01/01/2023] Open
Abstract
Biofilms are naturally present in aquifers and can interact with zero valent iron nanoparticles (nZVI) used as remediation agents in contaminated groundwater; thereby they may alter nZVI reactivity towards targeted contaminants in porous media. Laboratory scale experiments using columns filled with sand (50 cm long and 5.2 cm in diameter) were performed to investigate the impact of natural biofilms on nZVI reactivity towards tetrachloroethylene (PCE) in conditions simulating an unconsolidated sandy aquifer. Solutions containing PCE were injected through the sand columns in the presence or absence of biofilm and nZVI. Concentrations in PCE and its metabolites were monitored during 45 days in dissolved and gas phases. PCE concentrations decreased at the column outlets due both to its reductive dechlorination by nZVI (~30% of injected PCE) and its sorption or deposition (as PCE-DNAPL) on sand (~35% of injected PCE). No significant differences in PCE concentrations were found in presence or absence of biofilm. However, biofilm presence affected the nature of PCE metabolites. A higher release of ethene in the column containing biofilm was observed, whereas ethane was dominant in the absence of biofilm. Microbes consumed H2 released by the corrosion of nZVI limiting the hydrogenation of ethene to ethane. The consequences of biofilm development in porous media should be taken into account when considering treatment with nZVI, as it may affect the nature of produced metabolites.
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Characterizing a Newly Designed Steel-Wool-Based Household Filter for Safe Drinking Water Provision: Hydraulic Conductivity and Efficiency for Pathogen Removal. Processes (Basel) 2019. [DOI: 10.3390/pr7120966] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
This study characterizes the decrease of the hydraulic conductivity (permeability loss) of a metallic iron-based household water filter (Fe0 filter) for a duration of 12 months. A commercial steel wool (SW) is used as Fe0 source. The Fe0 unit containing 300 g of SW was sandwiched between two conventional biological sand filters (BSFs). The working solution was slightly turbid natural well water polluted with pathogens (total coliform = 1950 UFC mL−1) and contaminated with nitrate ([NO3−] = 24.0 mg L−1). The system was monitored twice per month for pH value, removal of nitrate, coliforms, and turbidity, the iron concentration, as well as the permeability loss. Results revealed a quantitative removal of coliform (>99%), nitrate (>99%) and turbidity (>96%). The whole column effluent depicted drinking water quality. The permeability loss after one year of operation was about 40%, and the filter was still producing 200 L of drinking water per day at a flow velocity of 12.5 L h−1. A progressive increase of the effluent pH value was also recorded from about 5.0 (influent) to 8.4 at the end of the experiment. The effluent iron concentration was constantly lower than 0.2 mg L−1, which is within the drinking-water quality standards. This study presents an affordable design that can be one-to-one translated into the real world to accelerate the achievement of the UN Sustainable Development Goals for safe drinking water.
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