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Lee J. Development of quantitative structure activity relationships (QSARs) for predicting the aggregation of TiO 2 nanoparticles under favorable conditions. Heliyon 2024; 10:e27966. [PMID: 38571612 PMCID: PMC10987904 DOI: 10.1016/j.heliyon.2024.e27966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 01/08/2024] [Accepted: 03/08/2024] [Indexed: 04/05/2024] Open
Abstract
This study developed multi-linear regression (MLR) quantitative structure-activity relationships (QSARs) to predict n-TiO2 aggregation in the presence of high concentrations of representative emerging organic contaminants (EOCs), which presented favorable conditions to interaction with n-TiO2. The largest diameter change (Δ 517 nm at 0 h and Δ 1164 nm at 12 h) of n-TiO2 was observed by estrone, while the smallest diameter change (Δ -114 nm at 0 h and - 4 nm at 12 h) was observed by lincomycin during experimental periods. In addition, the zeta potential changes of n-TiO2 were observed that the biggest changes were observed by 17β-estradiol (-1.3 mV) and alachlor (-10.02 mV) at 0 h, while 17β-estradiol (-1.31 mV) and pendimethalin (-11.4 mV) showed the biggest changes at 12 h comparing to control. These changes of n-TiO2 diameter and zeta potential may implicate the effects of unique physico-chemical properties of each EOC on the surface modification of n-TiO2. Based on the interaction results, this study investigated the QSARs between n-TiO2 aggregation and physico-chemical descriptors of EOCs with 7 representative descriptors (pKa, Cw, log Kow, M.W., P.S.A., M.V., # of HBD) for predicting n-TiO2 aggregation rate kinetics at 0 h and 12 h by applying MATLAB statistical methods (model 1 - fitlm and model 2 - stepwiselm). In a model 1, QSARs showed the good coefficients of determination (R2 = 0.92) at 0 h and (R2 = 0.87) at 12 h with 7 descriptors. In a model 2, QSARs showed the goodness of fit of a model (R2 = 0.9998) with 8 descriptors (pKa, Cw, log Kow, M.W., P.S.A., M.V., #HBD, pKa⋅#H bond donors) at 0 h, while QSARs showed the coefficients of determination (R2 = 0.68) with 2 descriptors (pKa, M.V.) at 12 h. Particularly, we observed that some descriptors of EOCs such as pKa and # of HBD having polarity have more influenced on the n-TiO2 aggregation rate kinetics. Our developed QSARs demonstrated that the 7 descriptors of EOCs were significantly effective descriptors for predicting n-TiO2 aggregation rate kinetics in favorable conditions, which may implicate the complexity interactions between heterogeneous surfaces of n-TiO2 and physico-chemical properties of EOCs.
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Affiliation(s)
- Jaewoong Lee
- Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
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2
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Nayak A, Karkare VP, Sadani K, Dasari H, Sivasamy A, Sundarabal N. Asphaltene-derived nanocomposites for the removal of emerging pollutants and its antimicrobial effects: batch and continuous column studies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-33049-8. [PMID: 38528220 DOI: 10.1007/s11356-024-33049-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 03/19/2024] [Indexed: 03/27/2024]
Abstract
Emerging contaminants are diverse ecotoxic materials requiring unique treatment for removal. Asphaltenes are environmentally hazardous carbon-rich solid waste product of the petroleum industry. In the current work, asphaltene-derived activated carbon (AC) was loaded with silver (Ag/AC) and used to remove amoxicillin (AMX) and tetracycline (TC) from aqueous phase. The prepared Ag/AC was characterised using FESEM, FTIR, XRD and surface area analysis. The FESEM micrographs confirmed the spherical silver nanoparticle-laden porous AC, and the BET surface area was found to be 213 m2/g. Batch adsorption studies were performed, and the equilibrium data were fit into adsorption isotherm and kinetic models. The Ag/AC exhibited superior monolayer adsorption capacity of 1012 mg/g and 770 mg/g for AMX and TC, respectively. The continuous column studies were also performed to evaluate the breakthrough parameters. Furthermore, the antimicrobial activity of the adsorbent was evaluated using zone of inhibition studies. Ag/AC was found to have an 8-mm-diameter zone of microbial inhibition. The obtained results showed that Ag/AC was a promising material for the removal of antibiotics and inhibition of resistance-developed mutated microbes in effluent water.
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Affiliation(s)
- Abhishek Nayak
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, Udupi, 576104, Karnataka, India
| | - Vaishnavi P Karkare
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, Udupi, 576104, Karnataka, India
| | - Kapil Sadani
- Department of Instrumentation & Control Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, Udupi, 576104, Karnataka, India
| | - Harshini Dasari
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, Udupi, 576104, Karnataka, India
| | - Arumugam Sivasamy
- Catalysis Science Laboratory & Cell for Industrial Safety and Risk Analysis (CISRA), CSIR-Central Leather Research Institute Adyar, Chennai, 600020, India
| | - Nethaji Sundarabal
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education (MAHE), Manipal, Udupi, 576104, Karnataka, India.
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3
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Biomass-derived carbon nanomaterials for sensor applications. J Pharm Biomed Anal 2023; 222:115102. [DOI: 10.1016/j.jpba.2022.115102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/23/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022]
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Ortúzar M, Esterhuizen M, Olicón-Hernández DR, González-López J, Aranda E. Pharmaceutical Pollution in Aquatic Environments: A Concise Review of Environmental Impacts and Bioremediation Systems. Front Microbiol 2022; 13:869332. [PMID: 35558129 PMCID: PMC9087044 DOI: 10.3389/fmicb.2022.869332] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/30/2022] [Indexed: 11/13/2022] Open
Abstract
The presence of emerging contaminants in the environment, such as pharmaceuticals, is a growing global concern. The excessive use of medication globally, together with the recalcitrance of pharmaceuticals in traditional wastewater treatment systems, has caused these compounds to present a severe environmental problem. In recent years, the increase in their availability, access and use of drugs has caused concentrations in water bodies to rise substantially. Considered as emerging contaminants, pharmaceuticals represent a challenge in the field of environmental remediation; therefore, alternative add-on systems for traditional wastewater treatment plants are continuously being developed to mitigate their impact and reduce their effects on the environment and human health. In this review, we describe the current status and impact of pharmaceutical compounds as emerging contaminants, focusing on their presence in water bodies, and analyzing the development of bioremediation systems, especially mycoremediation, for the removal of these pharmaceutical compounds with a special focus on fungal technologies.
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Affiliation(s)
- Maite Ortúzar
- Department of Microbiology and Genetics, Edificio Departamental, University of Salamanca, Salamanca, Spain
| | - Maranda Esterhuizen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, Finland and Helsinki Institute of Sustainability Science, University of Helsinki, Helsinki, Finland.,Joint Laboratory of Applied Ecotoxicology, Korea Institute of Science and Technology Europe, Saarbrücken, Germany.,University of Manitoba, Clayton H. Riddell Faculty of Environment, Earth, and Resources, Winnipeg, MB, Canada
| | - Darío Rafael Olicón-Hernández
- Instituto Politécnico Nacional, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Mexico City, Mexico
| | - Jesús González-López
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain.,Department of Microbiology, Faculty of Pharmacy, University of Granada, Granada, Spain
| | - Elisabet Aranda
- Environmental Microbiology Group, Institute of Water Research, University of Granada, Granada, Spain.,Department of Microbiology, Faculty of Pharmacy, University of Granada, Granada, Spain
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Nájera-Aguilar HA, Mayorga-Santis R, Gutiérrez-Hernández RF, Santiesteban-Hernández A, Rodríguez-Valadez FJ, Ulloa-Gutiérrez DA, Araiza-Aguilar JA, Cruz-Salomón A. Propranolol degradation through processes based on the generation of hydroxyl free radical. JOURNAL OF WATER AND HEALTH 2022; 20:216-226. [PMID: 35100169 DOI: 10.2166/wh.2021.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Pharmaceutical substances such as propranolol (PRO) are an emerging class of aquatic contaminants that have increasingly been detected in ground and surface water. For this reason, the aim of this study was to evaluate the efficiency of advanced oxidation systems for the PRO degradation. The tests started with anodic oxidation (AO), using 0.01, 0.05, and 0.1 M Na2SO4 as the supporting electrolyte and 16, 32, 48, and 64 mA cm-2 as current density. Under the best conditions obtained in AO, the electro-Fenton (EF) process was reviewed, where the effect of Fe2+ was analyzed with 5, 10, 15, and 20 mg Fe2+ L-1. The Fenton reaction (FR) was studied using the Fe2+ concentration that promoted the highest percentage of PRO removal and initial concentration of 16 mg L-1 of H2O2, in addition to these conditions, in the photo-Fenton (PF) system, the effect of UV light with wavelengths 254 and 365 nm were evaluated. The results obtained showed that the degradation efficiency of the EF > AO > PF > FR system along with a percent removal of 94.52, 90.4, 25.97, and 4.4%, respectively. The results showed that PRO can be removed through the studied systems, with the EF system being the most efficient.
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Affiliation(s)
- Hugo Alejandro Nájera-Aguilar
- Facultad de Ingeniería, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Col. Lajas, Maciel, Tuxtla Gutiérrez, Chiapas 29000, México
| | - Rosario Mayorga-Santis
- Departamento de Ingeniería Química y Bioquímica, Tecnológico Nacional de México Campus Tapachula, Km. 2 carretera a Puerto Madero s/n., Tapachula, Chiapas 30700, México E-mail:
| | - Rubén Fernando Gutiérrez-Hernández
- Departamento de Ingeniería Química y Bioquímica, Tecnológico Nacional de México Campus Tapachula, Km. 2 carretera a Puerto Madero s/n., Tapachula, Chiapas 30700, México E-mail:
| | - Antonio Santiesteban-Hernández
- El Colegio de la Frontera Sur, Grupo de Ecología de Artrópodos y Manejo de Plagas, carretera antiguo aeropuerto km 2.5, Tapachula, Chiapas 30700, México
| | - Francisco J Rodríguez-Valadez
- Centro de Investigación y Desarrollo Tecnológico en Electroquímica, S.C., Parque Tecnológico Querétaro Sanfandila, P.O. Box 064, Pedro Escobedo, Querétaro 76703, México
| | | | - Juan Antonio Araiza-Aguilar
- Facultad de Ingeniería, Universidad de Ciencias y Artes de Chiapas, Libramiento Norte Poniente No. 1150, Col. Lajas, Maciel, Tuxtla Gutiérrez, Chiapas 29000, México
| | - Abumalé Cruz-Salomón
- Escuela de Ciencias Químicas, sede Ocozocoautla, Universidad Autónoma de Chiapas (UNACH), Carretera Panamericana Ocozocoautla-Cintalapa Km. 2.5, Ocozocoautla de Espinosa, Chiapas 29140, México
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Mustapha S, Tijani JO, Ndamitso MM, Abdulkareem AS, Shuaib DT, Mohammed AK. A critical review on geosmin and 2-methylisoborneol in water: sources, effects, detection, and removal techniques. ENVIRONMENTAL MONITORING AND ASSESSMENT 2021; 193:204. [PMID: 33751262 DOI: 10.1007/s10661-021-08980-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
The exposure to geosmin (GSM) and 2-methylisoborneol (2-MIB) in water has caused a negative impact on product reputation and customer distrust. The occurrence of these compounds and their metabolites during drinking water treatment processes has caused different health challenges. Conventional treatment techniques such as coagulation, sedimentation, filtration, and chlorination employed in removing these two commonest taste and odor compounds (GSM and 2-MIB) were found to be ineffective and inherent shortcomings. The removal of GSM and MIB were found to be effective using combination of activated carbon and ozonation; however, high treatment cost associated with ozonation technique and poor regeneration efficiency of activated carbon constitute serious setback to the combined system. Other shortcoming of the activated carbon adsorption and ozonation include low adsorption efficiency due to the presence of natural organic matter and humic acid. In light of this background, the review is focused on the sources, effects, environmental pathways, detection, and removal techniques of 2-MIB and GSM from aqueous media. Although advanced oxidation processes (AOPs) were found to be promising to remove the two compounds from water but accompanied with different challenges. Herein, to fill the knowledge gap analysis on these algal metabolites (GSM and 2-MIB), the integration of treatment processes vis-a-viz combination of one or more AOPs with other conventional methods are considered logical to remove these odorous compounds and hence could improve overall water quality.
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Affiliation(s)
- S Mustapha
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria.
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria.
| | - J O Tijani
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - M M Ndamitso
- Department of Chemistry, Federal University of Technology, Bosso Campus, PMB 65, Minna, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - A S Abdulkareem
- Department of Chemical Engineering, Federal University of Technology, Gidan Kwano Campus, PMB 65, Minna, Niger State, Nigeria
- Nanotechnology Research Group, Africa Center of Excellence for Mycotoxin and Food Safety, Federal University of Technology, PMB 65, Minna, Niger State, Nigeria
| | - D T Shuaib
- Department of Chemistry, Illinois Institute of Technology, 3101 S Dearborn Street, Chicago, IL, 60616, USA
| | - A K Mohammed
- Department of Chemistry and Biochemistry, North Carolina Central University, 1801 Fayetteville Street, NC, 27707, Durham, USA
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7
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Gwenzi W, Chaukura N, Wenga T, Mtisi M. Biochars as media for air pollution control systems: Contaminant removal, applications and future research directions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:142249. [PMID: 33207469 DOI: 10.1016/j.scitotenv.2020.142249] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 08/09/2020] [Accepted: 09/05/2020] [Indexed: 06/11/2023]
Abstract
Biochars are low-cost and renewable biomaterials with several applications, including soil amendment, mitigation of greenhouse gas emissions, and removal of both inorganic and organic contaminants in aqueous systems. An increasing body of recent evidence indicates that biochars can also remove gaseous chemical contaminants, such as those occurring in industrial flue gases. However, unlike other applications such as in agroecosystems, soil amendments, and aquatic systems, comprehensive reviews on biochar applications in the field of air pollution control are still lacking. The current paper examined existing evidence to understand the nature of contaminants, particularly the gaseous ones, potential applications, constraints, and future research needs pertaining to biochar applications in air pollution control. The preparation of biochars and their functionalized derivatives, and the properties influencing their capacity to remove gaseous contaminants are summarized. The removal capacity and mechanisms of various organic and inorganic gaseous contaminants by biochars are discussed. Evidence shows that biochars effectively remove metal vapours, particularly elemental mercury (Hg0), acidic gases (H2S, SO2, CO2), ozone, nitrogen oxides (NOx), and organic contaminants including aromatic compounds, volatile organic compounds, and odorous substances. The mechanisms for the removal of gaseous contaminants, including; adsorption, precipitation, and size exclusion were presented. Potential industrial application domains include remediation of gaseous emissions from incinerators, waste-to-energy systems, kilns, biomass and coal-fired boilers/cookers, cremation, smelters, wastewater treatment, and agricultural production systems including livestock husbandry. These industrial applications, coupled with the renewable, low-cost and sustainable nature of biochars, point to opportunities to further develop and scale up the biochar technology in the air pollution control industry. However, the biochar-based air filter technology still faces several challenges, largely stemming from constraints and several knowledge gaps, which were highlighted. Hence, further research is required to address these constraints and knowledge gaps before the benefits of the biochar-based air filters are realized.
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Affiliation(s)
- Willis Gwenzi
- Biosystems and Environmental Engineering Research Group, Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe.
| | - Nhamo Chaukura
- Department of Physical and Earth Sciences, Sol Plaatje University, Kimberley, South Africa
| | - Terrence Wenga
- Waste Treatment and Utilization Research Group, Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
| | - Munyaradzi Mtisi
- Biosystems and Environmental Engineering Research Group, Department of Soil Science and Agricultural Engineering, Faculty of Agriculture, University of Zimbabwe, P.O. Box MP 167, Mount Pleasant, Harare, Zimbabwe
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8
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Duroudier N, Katsumiti A, Mikolaczyk M, Schäfer J, Bilbao E, Cajaraville MP. Cell and tissue level responses in mussels Mytilus galloprovincialis dietarily exposed to PVP/PEI coated Ag nanoparticles at two seasons. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 750:141303. [PMID: 32871366 DOI: 10.1016/j.scitotenv.2020.141303] [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: 04/17/2020] [Revised: 07/24/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
Silver nanoparticles (Ag NPs) are present in numerous consumer products due to their antimicrobial and other unique properties, thus concerns about their potential input into aquatic ecosystems are increasing. Toxicity of Ag NPs in waterborne exposed aquatic organisms has been widely investigated, but studies assessing the potential toxic effects caused after ingestion through the food web, especially at low realistic concentrations, remain scarce. Moreover, it is not well known whether season may influence toxic effects of Ag NPs. The main objective of this study was to determine cell and tissue level responses in mussels Mytilus galloprovincialis dietarily exposed to poly-N-vinyl-2-pirrolidone/polyethyleneimine (PVP/PEI) coated 5 nm Ag NPs for 1, 7 and 21 days both in autumn and spring. Mussels were fed every day with microalgae Isochrysis galbana exposed for 24 h to a low dose (1 μg Ag/L Ag NPs) in spring and to a higher dose (10 μg Ag/L Ag NPs) in spring and autumn. Mussels fed with microalgae exposed to the high dose accumulated Ag significantly after 21 days in both seasons, higher levels being measured in autumn compared to spring. Intralysosomal metal accumulation measured in mussel digestive gland and time- and dose-dependent reduction of mussels health status was similar in both seasons. DNA strand breaks increased significantly in hemocytes at both exposure doses along the 21 days in spring and micronuclei frequency showed an increasing trend after 1 and 7 days of exposure to 1 μg Ag/L Ag NPs in spring and to 10 μg Ag/L in both seasons. Values decreased after 21 days of exposure in all the cases. In conclusion, PVP/PEI coated 5 nm Ag NPs ingested through the food web were significantly accumulated in mussel tissues and caused adverse cell and tissue level effects both in autumn and in spring.
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Affiliation(s)
- Nerea Duroudier
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology and Research Centre for Experimental Marine Biology and Biotechnology, PiE, University of the Basque Country UPV/EHU, Basque Country, Spain
| | - Alberto Katsumiti
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology and Research Centre for Experimental Marine Biology and Biotechnology, PiE, University of the Basque Country UPV/EHU, Basque Country, Spain
| | - Mathilde Mikolaczyk
- Université de Bordeaux, UMR 5805 EPOC, Allée Geoffroy St Hilaire, 33615 Pessac Cedex, France
| | - Jörg Schäfer
- Université de Bordeaux, UMR 5805 EPOC, Allée Geoffroy St Hilaire, 33615 Pessac Cedex, France
| | - Eider Bilbao
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology and Research Centre for Experimental Marine Biology and Biotechnology, PiE, University of the Basque Country UPV/EHU, Basque Country, Spain
| | - Miren P Cajaraville
- CBET Research Group, Dept. Zoology and Animal Cell Biology, Faculty of Science and Technology and Research Centre for Experimental Marine Biology and Biotechnology, PiE, University of the Basque Country UPV/EHU, Basque Country, Spain.
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9
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Nanomaterial-based fluorescent biosensors for monitoring environmental pollutants: A critical review. TALANTA OPEN 2020. [DOI: 10.1016/j.talo.2020.100006] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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10
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Tarik M, Ludwig C. Evaporation of Metals during the Thermal Treatment of Oxide Nanomaterials in Cellulose-Based Matrices. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4504-4514. [PMID: 32155334 DOI: 10.1021/acs.est.9b06359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Like conventional material products, waste is the last stage of the life cycle of engineered nanomaterials, which are then incinerated or stabilized before disposal. However, because of their special physical characteristics, the fate of the thermally treated nanomaterials may differ or not from the conventional ones. In this study the thermal release of metals from three nanomaterials, namely CuO, ZnO, and TiO2, embedded in matrices containing organic and inorganic compounds was investigated by using an in-house developed setup. The latter, which combines a TGA (Thermogravimetric Analyzer) and an ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer), offers the possibility to gain simultaneously thermogravimetric and elemental information. It is shown that the matrix composition, such as chlorine and silicon, plays a key role in the evaporation of Cu and Zn at temperatures above 700 °C, while at relatively low temperatures (250 to 450 °C) the nanomaterials are most probably entrained in the flue gas independently of their chemical properties. Incineration experiments using a tubular furnace and subsequent ICP-MS (ICP Mass Spectrometry) analysis of the obtained residues allowed for quantification of the metal evaporation from the three nanomaterials.
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Affiliation(s)
- Mohamed Tarik
- Bioenergy and Catalysis Laboratory (CPM-LBK), Energy and Environment Research Division (ENE), Paul Scherrer Institut (PSI), CH 5232 Villigen PSI, Switzerland
| | - Christian Ludwig
- Bioenergy and Catalysis Laboratory (CPM-LBK), Energy and Environment Research Division (ENE), Paul Scherrer Institut (PSI), CH 5232 Villigen PSI, Switzerland
- Environmental Engineering Institute (IIE), School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), CH 1015 Lausanne, Switzerland
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11
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Chivas-Joly C, Longuet C, Pourchez J, Leclerc L, Sarry G, Lopez-Cuesta JM. Physical, morphological and chemical modification of Al-based nanofillers in by-products of incinerated nanocomposites and related biological outcome. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:405-412. [PMID: 30448553 DOI: 10.1016/j.jhazmat.2018.10.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 09/28/2018] [Accepted: 10/11/2018] [Indexed: 06/09/2023]
Abstract
The number of products containing nanomaterials is increasing this last ten years. Information and literature about the end-of-life of nanocomposites often remains partial and does not address the overall fate and transformations of nanoparticles that may affect biological responses. This paper underlines that the physico-chemical features of nanoparticles can be modified by the incineration process and the available toxicological data on pristine nanofillers might not be relevant to assess the modified nanoparticles included in soot. Combustion tests have been performed at lab-scale using a cone calorimeter modified to collect fumes (particulate matter and gas phase) and have been characterized using various techniques. Nanocomposites selected were poly(ethylene vinyl acetate) containing Al-based nanoparticles, i.e. boehmites or alumina. Evaluations of in vitro cytotoxicity responses on pristine nanofillers, soot and residual ash, show that safe boehmite nanoparticles, become toxic due to a chemical modification after incineration process.
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Affiliation(s)
- C Chivas-Joly
- LNE, 29 Avenue Roger Hennequin, 78197 Trappes Cedex, France.
| | - C Longuet
- C2MA, Ecole des Mines d'Alès, 6 Avenue de Clavières, 30319 Alès Cedex, France
| | - J Pourchez
- Univ. Lyon, IMT Mines Saint-Etienne, Centre CIS, INSERM, SainBioSE, F-42023 Saint-Etienne, France
| | - L Leclerc
- Univ. Lyon, IMT Mines Saint-Etienne, Centre CIS, INSERM, SainBioSE, F-42023 Saint-Etienne, France
| | - G Sarry
- Univ. Lyon, IMT Mines Saint-Etienne, Centre CIS, INSERM, SainBioSE, F-42023 Saint-Etienne, France
| | - J-M Lopez-Cuesta
- C2MA, Ecole des Mines d'Alès, 6 Avenue de Clavières, 30319 Alès Cedex, France
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Kapoor V, Phan D, Pasha ABMT. Effects of metal oxide nanoparticles on nitrification in wastewater treatment systems: A systematic review. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2018; 53:659-668. [PMID: 29469639 DOI: 10.1080/10934529.2018.1438825] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
While the variety of engineered nanoparticles used in consumer products continues to grow, the use of metal oxide nanoparticles in electronics, textiles, cosmetics and food packaging industry has grown exponentially in recent years, which will inevitably result in their release into wastewater streams in turn impacting the important biological processes in wastewater treatment plants. Among these processes, nitrification play a critical role in nitrogen removal during wastewater treatment, however, it is sensitive to a wide range of inhibitory substances including metal oxide nanoparticles. Therefore, it is essential to systematically asses the effects of metal oxide nanoparticles on nitrification in biological wastewater treatment systems. In this review we discuss the present scenario of metal oxide nanoparticles and their impact on biological wastewater treatment processes, specifically nitrogen removal through nitrification. We also summarize the various methods used to measure nitrification inhibition by metal oxide nanoparticles and highlight corresponding results obtained using those methods. Finally, the key research gaps that need to be addressed in future are discussed.
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Affiliation(s)
- Vikram Kapoor
- a Department of Civil and Environmental Engineering , University of Texas at San Antonio , San Antonio , Texas , USA
| | - Duc Phan
- a Department of Civil and Environmental Engineering , University of Texas at San Antonio , San Antonio , Texas , USA
| | - A B M Tanvir Pasha
- a Department of Civil and Environmental Engineering , University of Texas at San Antonio , San Antonio , Texas , USA
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Knapp J, Allesch A, Müller W, Bockreis A. Methods to estimate the transfer of contaminants into recycling products - A case study from Austria. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 69:88-100. [PMID: 28865910 DOI: 10.1016/j.wasman.2017.08.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2017] [Revised: 07/03/2017] [Accepted: 08/21/2017] [Indexed: 06/07/2023]
Abstract
Recycling of waste materials is desirable to reduce the consumption of limited primary resources, but also includes the risk of recycling unwanted, hazardous substances. In Austria, the legal framework demands secondary products must not present a higher risk than comparable products derived from primary resources. However, the act provides no definition on how to assess this risk potential. This paper describes the development of different quantitative and qualitative methods to estimate the transfer of contaminants in recycling processes. The quantitative methods comprise the comparison of concentrations of harmful substances in recycling products to corresponding primary products and to existing limit values. The developed evaluation matrix, which considers further aspects, allows for the assessment of the qualitative risk potential. The results show that, depending on the assessed waste fraction, particular contaminants can be critical. Their concentrations were higher than in comparable primary materials and did not comply with existing limit values. On the other hand, the results show that a long-term, well-established quality control system can assure compliance with the limit values. The results of the qualitative assessment obtained with the evaluation matrix support the results of the quantitative assessment. Therefore, the evaluation matrix can be suitable to quickly screen waste streams used for recycling to estimate their potential environmental and health risks. To prevent the transfer of contaminants into product cycles, improved data of relevant substances in secondary resources are necessary. In addition, regulations for material recycling are required to assure adequate quality control measures, including limit values.
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Affiliation(s)
- Julika Knapp
- Universität Innsbruck, Unit for Environmental Engineering, Section of Waste Treatment and Resource Management, Austria.
| | - Astrid Allesch
- TU Wien, Institute for Water Quality, Resource and Waste Management, Austria
| | - Wolfgang Müller
- Universität Innsbruck, Unit for Environmental Engineering, Section of Waste Treatment and Resource Management, Austria
| | - Anke Bockreis
- Universität Innsbruck, Unit for Environmental Engineering, Section of Waste Treatment and Resource Management, Austria
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14
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Ahmed I, M. N. Iqbal H, Dhama K. Enzyme-Based Biodegradation of Hazardous Pollutants – An Overview. ACTA ACUST UNITED AC 2017. [DOI: 10.18006/2017.5(4).402.411] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Methodology for the Assessment of the Ecotoxicological Potential of Construction Materials. MATERIALS 2017; 10:ma10060649. [PMID: 28773011 PMCID: PMC5554030 DOI: 10.3390/ma10060649] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/07/2017] [Accepted: 06/08/2017] [Indexed: 11/17/2022]
Abstract
Innovation in construction materials (CM) implies changing their composition by incorporating raw materials, usually non-traditional ones, which confer the desired characteristics. However, this practice may have unknown risks. This paper discusses the ecotoxicological potential associated with raw and construction materials, and proposes and applies a methodology for the assessment of their ecotoxicological potential. This methodology is based on existing laws, such as Regulation (European Commission) No. 1907/2006 (REACH—Registration, Evaluation, Authorization and Restriction of Chemicals) and Regulation (European Commission) No. 1272/2008 (CLP—Classification, Labelling and Packaging). Its application and validation showed that raw material without clear evidence of ecotoxicological potential, but with some ability to release chemicals, can lead to the formulation of a CM with a slightly lower hazardousness in terms of chemical characterization despite a slightly higher ecotoxicological potential than the raw materials. The proposed methodology can be a useful tool for the development and manufacturing of products and the design choice of the most appropriate CM, aiming at the reduction of their environmental impact and contributing to construction sustainability.
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16
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Norvill ZN, Shilton A, Guieysse B. Emerging contaminant degradation and removal in algal wastewater treatment ponds: Identifying the research gaps. JOURNAL OF HAZARDOUS MATERIALS 2016; 313:291-309. [PMID: 27135171 DOI: 10.1016/j.jhazmat.2016.03.085] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 02/22/2016] [Accepted: 03/29/2016] [Indexed: 06/05/2023]
Abstract
Whereas the fate of emerging contaminants (ECs) during 'conventional' and 'advanced' wastewater treatment (WWT) has been intensively studied, little research has been conducted on the algal WWT ponds commonly used in provincial areas. The long retention times and large surface areas exposed to light potentially allow more opportunities for EC removal to occur, but experimental evidence is lacking to enable definite predictions about EC fate across different algal WWT systems. This study reviews the mechanisms of EC hydrolysis, sorption, biodegradation, and photodegradation, applying available knowledge to the case of algal WWT. From this basis the review identifies three main areas that need more research due to the unique environmental and ecological conditions occurring in algal WWT ponds: i) the effect of diurnally fluctuating pH and dissolved oxygen upon removal mechanisms; ii) the influence of algae and algal biomass on biodegradation and sorption under relevant conditions; and iii) the significance of EC photodegradation in the presence of dissolved and suspended materials. Because of the high concentration of dissolved organics typically found in algal WWT ponds, most EC photodegradation likely occurs via indirect mechanisms rather than direct photolysis in these systems.
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Affiliation(s)
- Zane N Norvill
- School of Engineering and Advanced Technology, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Andy Shilton
- School of Engineering and Advanced Technology, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand
| | - Benoit Guieysse
- School of Engineering and Advanced Technology, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.
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17
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Topuz E, van Gestel CAM. An approach for environmental risk assessment of engineered nanomaterials using Analytical Hierarchy Process (AHP) and fuzzy inference rules. ENVIRONMENT INTERNATIONAL 2016; 92-93:334-347. [PMID: 27131016 DOI: 10.1016/j.envint.2016.04.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 04/01/2016] [Accepted: 04/13/2016] [Indexed: 06/05/2023]
Abstract
The usage of Engineered Nanoparticles (ENPs) in consumer products is relatively new and there is a need to conduct environmental risk assessment (ERA) to evaluate their impacts on the environment. However, alternative approaches are required for ERA of ENPs because of the huge gap in data and knowledge compared to conventional pollutants and their unique properties that make it difficult to apply existing approaches. This study aims to propose an ERA approach for ENPs by integrating Analytical Hierarchy Process (AHP) and fuzzy inference models which provide a systematic evaluation of risk factors and reducing uncertainty about the data and information, respectively. Risk is assumed to be the combination of occurrence likelihood, exposure potential and toxic effects in the environment. A hierarchy was established to evaluate the sub factors of these components. Evaluation was made with fuzzy numbers to reduce uncertainty and incorporate the expert judgements. Overall score of each component was combined with fuzzy inference rules by using expert judgements. Proposed approach reports the risk class and its membership degree such as Minor (0.7). Therefore, results are precise and helpful to determine the risk management strategies. Moreover, priority weights calculated by comparing the risk factors based on their importance for the risk enable users to understand which factor is effective on the risk. Proposed approach was applied for Ag (two nanoparticles with different coating) and TiO2 nanoparticles for different case studies. Results verified the proposed benefits of the approach.
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Affiliation(s)
- Emel Topuz
- Department of Ecological Science, Faculty of Earth and Life Sciences, Vrije Universiteit, Amsterdam, The Netherlands; Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
| | - Cornelis A M van Gestel
- Department of Environmental Engineering, Istanbul Technical University, Maslak, Istanbul 34469, Turkey
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18
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19
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Mallevre F, Alba C, Milne C, Gillespie S, Fernandes TF, Aspray TJ. Toxicity Testing of Pristine and Aged Silver Nanoparticles in Real Wastewaters Using Bioluminescent Pseudomonas putida. NANOMATERIALS (BASEL, SWITZERLAND) 2016; 6:E49. [PMID: 28344306 PMCID: PMC5302522 DOI: 10.3390/nano6030049] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 02/25/2016] [Accepted: 03/03/2016] [Indexed: 12/12/2022]
Abstract
Impact of aging on nanoparticle toxicity in real matrices is scarcely investigated due to a lack of suitable methodologies. Herein, the toxicity of pristine and aged silver nanoparticles (Ag NPs) to a bioluminescent Pseudomonas putida bioreporter was measured in spiked crude and final wastewater samples (CWs and FWs, respectively) collected from four wastewater treatment plants (WWTPs). Results showed lower toxicity of pristine Ag NPs in CWs than in FWs. The effect of the matrix on the eventual Ag NP toxicity was related to multiple physico-chemical parameters (biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS) pH, ammonia, sulfide and chloride) based on a multivariate analysis. However, no collection site effect was concluded. Aged Ag NPs (up to eight weeks) were found less toxic than pristine Ag NPs in CWs; evident increased aggregation and decreased dissolution were associated with aging. However, Ag NPs exhibited consistent toxicity in FWs despite aging; comparable results were obtained in artificial wastewater (AW) simulating effluent. The study demonstrates the potency of performing nanoparticle acute toxicity testing in real and complex matrices such as wastewaters using relevant bacterial bioreporters.
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Affiliation(s)
- Florian Mallevre
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Camille Alba
- Sciences and Technologies, Lille 1 University, Villeneuve d'Ascq 59650, France.
| | - Craig Milne
- Scottish Water, Juniper House, Heriot-Watt Research Park, Edinburgh EH14 4AP, UK.
| | - Simon Gillespie
- Scottish Water, Juniper House, Heriot-Watt Research Park, Edinburgh EH14 4AP, UK.
| | - Teresa F Fernandes
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
| | - Thomas J Aspray
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, UK.
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20
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21
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Lopes C, Antelo LT, Franco-Uría A, Alonso AA, Pérez-Martín R. Valorisation of fish by-products against waste management treatments--Comparison of environmental impacts. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 46:103-112. [PMID: 26316101 DOI: 10.1016/j.wasman.2015.08.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 07/13/2015] [Accepted: 08/13/2015] [Indexed: 06/04/2023]
Abstract
Reuse and valorisation of fish by-products is a key process for marine resources conservation. Usually, fishmeal and oil processing factories collect the by-products generated by fishing port and industry processing activities, producing an economical benefit to both parts. In the same way, different added-value products can be recovered by the valorisation industries whereas fishing companies save the costs associated with the management of those wastes. However, it is important to estimate the advantages of valorisation processes not only in terms of economic income, but also considering the environmental impacts. This would help to know if the valorisation of a residue provokes higher impact than other waste management options, which means that its advantages are probably not enough for guarantying a sustainable waste reuse. To that purpose, there are several methodologies to evaluate the environmental impacts of processes, including those of waste management, providing different indicators which give information on relevant environmental aspects. In the current study, a comparative environmental assessment between a valorisation process (fishmeal and oil production) and different waste management scenarios (composting, incineration and landfilling) was developed. This comparison is a necessary step for the development and industrial implementation of these processes as the best alternative treatment for fish by-products. The obtained results showed that both valorisation process and waste management treatments presented similar impacts. However, a significant benefit can be achieved through valorisation of fish by-products. Additionally, the implications of the possible presence of pollutants were discussed.
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Affiliation(s)
- Carla Lopes
- Process Engineering Group, Marine Research Institute IIM-CSIC, Eduardo Cabello, 6, 36208 Vigo, Spain; Dept. of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Luis T Antelo
- Process Engineering Group, Marine Research Institute IIM-CSIC, Eduardo Cabello, 6, 36208 Vigo, Spain
| | - Amaya Franco-Uría
- Dept. of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Antonio A Alonso
- Process Engineering Group, Marine Research Institute IIM-CSIC, Eduardo Cabello, 6, 36208 Vigo, Spain
| | - Ricardo Pérez-Martín
- Process Engineering Group, Marine Research Institute IIM-CSIC, Eduardo Cabello, 6, 36208 Vigo, Spain
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22
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Part F, Zecha G, Causon T, Sinner EK, Huber-Humer M. Current limitations and challenges in nanowaste detection, characterisation and monitoring. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 43:407-420. [PMID: 26117420 DOI: 10.1016/j.wasman.2015.05.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/22/2015] [Accepted: 05/25/2015] [Indexed: 06/04/2023]
Abstract
Engineered nanomaterials (ENMs) are already extensively used in diverse consumer products. Along the life cycle of a nano-enabled product, ENMs can be released and subsequently accumulate in the environment. Material flow models also indicate that a variety of ENMs may accumulate in waste streams. Therefore, a new type of waste, so-called nanowaste, is generated when end-of-life ENMs and nano-enabled products are disposed of. In terms of the precautionary principle, environmental monitoring of end-of-life ENMs is crucial to allow assessment of the potential impact of nanowaste on our ecosystem. Trace analysis and quantification of nanoparticulate species is very challenging because of the variety of ENM types that are used in products and low concentrations of nanowaste expected in complex environmental media. In the framework of this paper, challenges in nanowaste characterisation and appropriate analytical techniques which can be applied to nanowaste analysis are summarised. Recent case studies focussing on the characterisation of ENMs in waste streams are discussed. Most studies aim to investigate the fate of nanowaste during incineration, particularly considering aerosol measurements; whereas, detailed studies focusing on the potential release of nanowaste during waste recycling processes are currently not available. In terms of suitable analytical methods, separation techniques coupled to spectrometry-based methods are promising tools to detect nanowaste and determine particle size distribution in liquid waste samples. Standardised leaching protocols can be applied to generate soluble fractions stemming from solid wastes, while micro- and ultrafiltration can be used to enrich nanoparticulate species. Imaging techniques combined with X-ray-based methods are powerful tools for determining particle size, morphology and screening elemental composition. However, quantification of nanowaste is currently hampered due to the problem to differentiate engineered from naturally-occurring nanoparticles. A promising approach to face these challenges in nanowaste characterisation might be the application of nanotracers with unique optical properties, elemental or isotopic fingerprints. At present, there is also a need to develop and standardise analytical protocols regarding nanowaste sampling, separation and quantification. In general, more experimental studies are needed to examine the fate and transport of ENMs in waste streams and to deduce transfer coefficients, respectively to develop reliable material flow models.
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Affiliation(s)
- Florian Part
- Department of Water-Atmosphere-Environment, University of Natural Resources and Life Sciences, Institute of Waste Management, Muthgasse 107, 1190 Vienna, Austria
| | - Gudrun Zecha
- Department of Water-Atmosphere-Environment, University of Natural Resources and Life Sciences, Institute of Waste Management, Muthgasse 107, 1190 Vienna, Austria
| | - Tim Causon
- Department of Chemistry, Division of Analytical Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
| | - Eva-Kathrin Sinner
- Department of Nanobiotechnology, Institute for Synthetic Bioarchitectures, University of Natural Resources and Life Sciences, Muthgasse 11/II, 1190 Vienna, Austria
| | - Marion Huber-Humer
- Department of Water-Atmosphere-Environment, University of Natural Resources and Life Sciences, Institute of Waste Management, Muthgasse 107, 1190 Vienna, Austria.
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23
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Tolaymat T, El Badawy A, Sequeira R, Genaidy A. A system-of-systems approach as a broad and integrated paradigm for sustainable engineered nanomaterials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 511:595-607. [PMID: 25590540 DOI: 10.1016/j.scitotenv.2014.09.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 09/09/2014] [Accepted: 09/10/2014] [Indexed: 06/04/2023]
Abstract
There is an urgent need for a trans-disciplinary approach for the collective evaluation of engineered nanomaterial (ENM) benefits and risks. Currently, research studies are mostly focused on examining effects at individual endpoints with emphasis on ENM risk effects. Less research work is pursuing the integration needed to advance the science of sustainable ENMs. Therefore, the primary objective of this article is to discuss the system-of-systems (SoS) approach as a broad and integrated paradigm to examine ENM benefits and risks to society, environment, and economy (SEE) within a sustainability context. The aims are focused on: (a) current approaches in the scientific literature and the need for a broad and integrated approach, (b) documentation of ENM SoS in terms of architecture and governing rules and practices within sustainability context, and (c) implementation plan for the road ahead. In essence, the SoS architecture is a communication vehicle offering the opportunity to track benefits and risks in an integrated fashion so as to understand the implications and make decisions about advancing the science of sustainable ENMs. In support of the SoS architecture, we propose using an analytic-based decision support system consisting of a knowledge base and analytic engine along the benefit and risk informatics routes in the SEE system to build sound decisions on what constitutes sustainable and unsustainable ENMs in spite of the existing uncertainties and knowledge gaps. The work presented herein is neither a systematic review nor a critical appraisal of the scientific literature. Rather, it is a position paper that largely expresses the views of the authors based on their expert opinion drawn from industrial and academic experience.
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Affiliation(s)
- Thabet Tolaymat
- U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, OH, USA.
| | - Amro El Badawy
- Pegasus Technical Services Inc., Cincinnati, OH 45219, USA
| | - Reynold Sequeira
- University of Cincinnati, 2600 Clifton Ave., Cincinnati OH 45221, USA
| | - Ash Genaidy
- WorldTek Inc, 11884 Quarterhorse Ct, Cincinnati, OH 45249, USA
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Caballero-Guzman A, Sun T, Nowack B. Flows of engineered nanomaterials through the recycling process in Switzerland. WASTE MANAGEMENT (NEW YORK, N.Y.) 2015; 36:33-43. [PMID: 25524750 DOI: 10.1016/j.wasman.2014.11.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 11/05/2014] [Accepted: 11/07/2014] [Indexed: 06/04/2023]
Abstract
The use of engineered nanomaterials (ENMs) in diverse applications has increased during the last years and this will likely continue in the near future. As the number of applications increase, more and more waste with nanomaterials will be generated. A portion of this waste will enter the recycling system, for example, in electronic products, textiles and construction materials. The fate of these materials during and after the waste management and recycling operations is poorly understood. The aim of this work is to model the flows of nano-TiO2, nano-ZnO, nano-Ag and CNT in the recycling system in Switzerland. The basis for this study is published information on the ENMs flows on the Swiss system. We developed a method to assess their flow after recycling. To incorporate the uncertainties inherent to the limited information available, we applied a probabilistic material flow analysis approach. The results show that the recycling processes does not result in significant further propagation of nanomaterials into new products. Instead, the largest proportion will flow as waste that can subsequently be properly handled in incineration plants or landfills. Smaller fractions of ENMs will be eliminated or end up in materials that are sent abroad to undergo further recovery processes. Only a reduced amount of ENMs will flow back to the productive process of the economy in a limited number of sectors. Overall, the results suggest that risk assessment during recycling should focus on occupational exposure, release of ENMs in landfills and incineration plants, and toxicity assessment in a small number of recycled inputs.
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Affiliation(s)
- Alejandro Caballero-Guzman
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Tianyin Sun
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland
| | - Bernd Nowack
- EMPA, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, CH-9014 St. Gallen, Switzerland.
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Torrellas SA, Rodriguez AR, Escudero GO, Martín JMG, Rodriguez JG. Comparative evaluation of adsorption kinetics of diclofenac and isoproturon by activated carbon. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2015; 50:1241-1248. [PMID: 26301850 DOI: 10.1080/10934529.2015.1055149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Adsorption mechanism of diclofenac and isoproturon onto activated carbon has been proposed using Langmuir and Freundlich isotherms. Adsorption capacity and optimum adsorption isotherms were predicted by nonlinear regression method. Different kinetic equations, pseudo-first-order, pseudo-second-order, intraparticle diffusion model and Bangham kinetic model, were applied to study the adsorption kinetics of emerging contaminants on activated carbon in two aqueous matrices.
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Affiliation(s)
- Silvia A Torrellas
- a Catalysis and Separation Processes Group (CyPS), Department of Chemical Engineering, Faculty of Chemistry, Complutense University , Madrid , Spain
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Mallevre F, Fernandes TF, Aspray TJ. Silver, zinc oxide and titanium dioxide nanoparticle ecotoxicity to bioluminescent Pseudomonas putida in laboratory medium and artificial wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 195:218-225. [PMID: 25261625 DOI: 10.1016/j.envpol.2014.09.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/28/2014] [Accepted: 09/02/2014] [Indexed: 05/29/2023]
Abstract
Bacteria based ecotoxicology assessment of manufactured nanoparticles is largely restricted to Escherichia coli bioreporters in laboratory media. Here, toxicity effects of model OECD nanoparticles (Ag NM-300K, ZnO NM-110 and TiO2 NM-104) were assessed using the switch-off luminescent Pseudomonas putida BS566::luxCDABE bioreporter in Luria Bertani (LB) medium and artificial wastewater (AW). IC50 values ∼4 mg L(-1), 100 mg L(-1) and >200 mg L(-1) at 1 h were observed in LB for Ag NM-300K, ZnO NM-110 and TiO2 NM-104, respectively. Similar results were obtained in AW for Ag NM-300K (IC50∼5 mg L(-1)) and TiO2 NM-104 (IC50>200 mg L(-1)) whereas ZnO NM-110 was significantly higher (IC50>200 mg L(-1)). Lower ZnO NM-110 toxicity in AW compared to LB was associated with differences in agglomeration status and dissolution rate. This work demonstrates the importance of nanoecotoxicological studies in environmentally relevant matrices.
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Affiliation(s)
- Florian Mallevre
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Teresa F Fernandes
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Thomas J Aspray
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK.
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