51
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Cruces E, Barrios AC, Cahue YP, Januszewski B, Gilbertson LM, Perreault F. Similar toxicity mechanisms between graphene oxide and oxidized multi-walled carbon nanotubes in Microcystis aeruginosa. CHEMOSPHERE 2021; 265:129137. [PMID: 33288276 DOI: 10.1016/j.chemosphere.2020.129137] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
In photosynthetic microorganisms, the toxicity of carbon nanomaterials (CNMs) is typically characterized by a decrease in growth, viability, photosynthesis, as well as the induction of oxidative stress. However, it is currently unclear how the shape of the carbon structure in CNMs, such as in the 1-dimensional carbon nanotubes (CNTs) compared to the two-dimensional graphene oxide (GO), affects the way they interact with cells. In this study, the effects of GO and oxidized multi-walled CNTs were compared in the cyanobacterium Microcystis aeruginosa to determine the similarities or differences in how the two CNMs interact with and induce toxicity to cyanobacteria. Using change in Chlorophyll a concentrations, the effective concentrations inducing 50% inhibition (EC50) at 96 h are found to be 11.1 μg/mL and 7.38 μg/mL for GO and CNTs, respectively. The EC50 of the two CNMs were not found to be statistically different. Changes in fluorescein diacetate and 2',7'-dichlorodihydrofluorescein diacetate fluorescence, measured at the EC50 concentrations, suggest a decrease in esterase enzyme activity but no oxidative stress. Scanning and transmission electron microscopy imaging did not show extensive membrane damage in cells exposed to GO or CNTs. Altogether, the decrease in metabolic activity and photosynthetic activity without oxidative stress or membrane damage support the hypothesis that both GO and CNTs induced indirect toxicity through physical mechanisms associated with light shading and cell aggregation. This indirect toxicity explains why the intrinsic differences in shape, size, and surface properties between CNTs and GO did not result in differences in how they induce toxicity to cyanobacteria.
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Affiliation(s)
- Edgardo Cruces
- Centro de Investigaciones Costeras Universidad de Atacama, Avenida Copayapu 485, Copiapo, Chile
| | - Ana C Barrios
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, United States
| | - Yaritza P Cahue
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, United States
| | - Brielle Januszewski
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, United States
| | - Leanne M Gilbertson
- Department of Civil and Environmental Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA; Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - François Perreault
- School of Sustainable Engineering and the Built Environment, Arizona State University, Tempe, AZ, 85287-3005, USA; Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, United States.
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52
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Vieira Y, Lima EC, Foletto EL, Dotto GL. Microplastics physicochemical properties, specific adsorption modeling and their interaction with pharmaceuticals and other emerging contaminants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141981. [PMID: 32911167 DOI: 10.1016/j.scitotenv.2020.141981] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/06/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
This review discusses the imminent threat that microplastics (MPs) associated with pharmaceuticals represent to the aquatic environment and public health. We initially focused upon recognizing and stressing that MPs are ubiquitous pollutants. The influence of environmental factors, such as pH, mechanical stress, and photodegradation, are examined, aiming to elucidate how both substances might associate, what are their simultaneous degradation pathways and, to understand the interactions between MPs and pharmaceuticals. Mathematical tools, such as modeling and simulations, are presented in detail, aiming to improve how information is interpreted. Furthermore, it is exhibited that MPs sorption and interaction behavior towards organic contaminants play an important role in understanding its dynamics in the environment, as well as their possible interactions with pharmaceuticals that are summarized. At last, MPs and pharmaceuticals toxicity and bioaccumulation are presented.
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Affiliation(s)
- Yasmin Vieira
- Department of Chemistry, Federal University of Santa Maria (UFSM), Av. Roraima, 1000-13, 97105-900 Santa Maria, RS, Brazil
| | - Eder C Lima
- Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil
| | - Edson Luiz Foletto
- Chemical Engineering Department, Federal University of Santa Maria (UFSM), Av. Roraima, 1000-7, 97105-900 Santa Maria, RS, Brazil
| | - Guilherme Luiz Dotto
- Department of Chemistry, Federal University of Santa Maria (UFSM), Av. Roraima, 1000-13, 97105-900 Santa Maria, RS, Brazil; Chemical Engineering Department, Federal University of Santa Maria (UFSM), Av. Roraima, 1000-7, 97105-900 Santa Maria, RS, Brazil.
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53
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Tian Y, Cai R, Yue T, Gao Z, Yuan Y, Wang Z. Application of nanostructures as antimicrobials in the control of foodborne pathogen. Crit Rev Food Sci Nutr 2021; 62:3951-3968. [PMID: 33427486 DOI: 10.1080/10408398.2021.1871586] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Foodborne pathogens are the main cause of human foodborne diseases and pose a serious threat to food safety. The control of them has always been a significant issue in food industry. With good biocompatibility and stability, nanomaterials display excellent bactericidal properties against many kinds of bacteria. In this review, the generation and application of nanostructures as antibacterial in the control of foodborne pathogens was summarized. The antibacterial effects of photocatalytic and contact bacteriostatic nanomaterials agents were mainly introduced. The influence factors and mechanisms of nanomaterials on the inactivation of foodborne pathogens were displayed. The photocatalytic nanostructured bacteriostatic agents can produce reactive oxygen species (ROS) and lead to charge transfer, which result in damaging of cell wall and leakage of small molecules under light irradiation. In addition, metals and metal oxide nanoparticles can kill bacterial cells by releasing metal ions, forming ROS and electrostatic interaction with cell membrane. Besides, the synergistic action of nanoparticles with natural antibacterial agents can improve the stability of these agents and their bactericidal performance. These current researches provided a broader idea for the control of microorganisms in food.
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Affiliation(s)
- Yu Tian
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Rui Cai
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Zhenpeng Gao
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
| | - Zhouli Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China.,Ministry of Agriculture, Laboratory of Quality & Safety Risk Assessment for Agro-products (YangLing), Yangling, Shaanxi, China.,National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling, Shaanxi, China
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54
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Zhang C, Wang X, Fan S, Lan P, Cao C, Zhang Y. Silk fibroin/reduced graphene oxide composite mats with enhanced mechanical properties and conductivity for tissue engineering. Colloids Surf B Biointerfaces 2021; 197:111444. [DOI: 10.1016/j.colsurfb.2020.111444] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/15/2020] [Accepted: 10/28/2020] [Indexed: 12/24/2022]
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55
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Dong S, Cai W, Xia J, Sheng L, Wang W, Liu H. Aggregation kinetics of fragmental PET nanoplastics in aqueous environment: Complex roles of electrolytes, pH and humic acid. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115828. [PMID: 33120151 DOI: 10.1016/j.envpol.2020.115828] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/06/2020] [Accepted: 10/10/2020] [Indexed: 06/11/2023]
Abstract
The aggregation kinetics of fragmental polyethylene glycol terephthalate (PET) nanoplastics under various chemistry conditions in aqueous environment were firstly investigated in this work. The aggregation of PET nanoplastics increased with increasing electrolyte concentrations and decreasing solution pH, which became stronger with the presence of divalent cations (e.g. Ca2+ and Mg2+) than that of monovalent cations (e.g. Na+ and K+). The effect of cations with the same valence on the aggregation of PET nanoplastics was similar. The measured critical coagulation concentrations (CCC) for PET nanoplastics at pH 6 were 55.0 mM KCl, 54.2 mM NaCl, 2.1 mM CaCl2 and 2.0 mM MgCl2, which increased to 110.4 mM NaCl and 5.6 mM CaCl2 at pH 10. In addition, the aggregation of PET nanoplastics was significantly inhibited with the presence of humic acid (HA), and the CCC values increased to 558.8 mM NaCl and 12.3 mM CaCl2 (1 mg L-1 HA). Results from this study showed that the fragmental PET nanoplastics had the quite higher CCC values and stability in aqueous environment. In addition, the aggregation behaviors of PET nanoplastics can be successfully predicted by the Derjguin Landau Verwey Overbeek (DLVO) theory.
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Affiliation(s)
- Shunan Dong
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China.
| | - Wangwei Cai
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Jihong Xia
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Liting Sheng
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Weimu Wang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Hui Liu
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
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56
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Zhao Y, Liu Y, Zhang X, Liao W. Environmental transformation of graphene oxide in the aquatic environment. CHEMOSPHERE 2021; 262:127885. [PMID: 32805658 DOI: 10.1016/j.chemosphere.2020.127885] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/11/2020] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
In recent years, research on graphene oxide (GO) has developed rapidly in both academic and industrial applications such as electronic, biosensor, drug delivery, water treatment and so forth. Based on the large amount of applications, it is anticipated that GO will inevitably find its own way to the environment, if used are not restricted to prevent their release. Environmental transformation is an important transformation process in the natural environment. In this review, we will summarize the recent developments on environmental transformation of GO in the aquatic environment. Although papers on environmental transformation of graphene-based nanomaterials can be found, a systematic picture describing photo-transformation of GO (dividing into different irradiation sources), environmental transformation of GO in the dark environmental, the environmental toxicity of GO are still lacking. Thus, it is essential to summarize how different light sources will affect the GO structure and reactive oxygen species generation in the photo-transformation process, how GO will react with various natural constituents in the aquatic environment, whether GO will toxic to different aquatic organisms and what will be the interactions between GO and the intracellular receptors in the intracellular level once GO released into the aquatic environment. This review will arouse the realization of potential risk that GO can bring to the aquatic environment and enlighten us to pay attention to behaviors of other two-dimensional GO-like nanomaterials, which have been intensively applied and studied in recent years.
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Affiliation(s)
- Yingcan Zhao
- Department of Biomedical Engineering, Southern University of Science and Technology, No. 1088 Xueyuan Rd, Nanshan District, Shenzhen, Guangdong, 518055, PR China; Graduate School at Shenzhen, Tsinghua University, Shenzhen, Guangdong, 518055, PR China.
| | - Yang Liu
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, NO.26, Jinjing Rd, Xiqing District, Tianjin, 300384, PR China; Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, NO.26, Jinjing Rd, Xiqing District, Tianjin, 300384, PR China.
| | - Xinbo Zhang
- Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin Chengjian University, NO.26, Jinjing Rd, Xiqing District, Tianjin, 300384, PR China; Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, NO.26, Jinjing Rd, Xiqing District, Tianjin, 300384, PR China
| | - Wenchao Liao
- College of Health and Environmental Engineering, Shenzhen Technology University, 3002 Lantian Rd, Pingshan District, Shenzhen, Guangdong, 518118, PR China
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57
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Farr AC, Hogan KJ, Mikos AG. Nanomaterial Additives for Fabrication of Stimuli-Responsive Skeletal Muscle Tissue Engineering Constructs. Adv Healthc Mater 2020; 9:e2000730. [PMID: 32691983 DOI: 10.1002/adhm.202000730] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/13/2020] [Indexed: 12/12/2022]
Abstract
Volumetric muscle loss necessitates novel tissue engineering strategies for skeletal muscle repair, which have traditionally involved cells and extracellular matrix-mimicking scaffolds and have thus far been unable to successfully restore physiologically relevant function. However, the incorporation of various nanomaterial additives with unique physicochemical properties into scaffolds has recently been explored as a means of fabricating constructs that are responsive to electrical, magnetic, and photothermal stimulation. Herein, several classes of nanomaterials that are used to mediate external stimulation to tissue engineered skeletal muscle are reviewed and the impact of these stimuli-responsive biomaterials on cell growth and differentiation and in vivo muscle repair is discussed. The degradation kinetics and biocompatibilities of these nanomaterial additives are also briefly examined and their potential for incorporation into clinically translatable skeletal muscle tissue engineering strategies is considered. Overall, these nanomaterial additives have proven efficacious and incorporation in tissue engineering scaffolds has resulted in enhanced functional skeletal muscle regeneration.
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Affiliation(s)
- Amy Corbin Farr
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Center for Engineering Complex Tissues, USA
| | - Katie J Hogan
- Center for Engineering Complex Tissues, USA
- Department of Bioengineering, Rice University, Houston, TX, 77030, USA
- Medical Scientist Training Program, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Antonios G Mikos
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Center for Engineering Complex Tissues, USA
- Department of Bioengineering, Rice University, Houston, TX, 77030, USA
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58
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Lin J, Xue C, Guo S, Owens G, Chen Z. Impact of green reduced graphene oxide on sewage sludge bioleaching with Acidithiobacillus ferrooxidanse. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115455. [PMID: 33254716 DOI: 10.1016/j.envpol.2020.115455] [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: 05/22/2020] [Revised: 07/21/2020] [Accepted: 08/15/2020] [Indexed: 06/12/2023]
Abstract
Worldwide graphene use is rapidly increasing in a variety of industrial applications to such an extent that efflux into the environment seems inevitable where the likely final reservoirs of graphene wastes is likely to be wastewater treatment plants are. Despite this an understanding of how graphene products impact the bioleaching of metals from sludge is still limited. In this study, the effect of reduced graphene oxide synthesized from eucalyptus leaf extracts (EL-rGO) on Zn2+ and Cu2+ bioleaching from sludge was investigated. The major new findings were that EL-rGO had a negative effect on Acidithiobacillus ferrooxidans (A. ferrooxidans) growth; since optical density decreased by 0.059 as EL-rGO dose increased from 1 to 50 mg/L, and the bioleaching of Cu2+ and Zn2+ decreased by 27.7 and 20.2%, respectively. While at a EL-rGO dose of 1 mg/L A. ferrooxidans grew better, scanning electron microscopy (SEM) confirmed that exposure to EL-rGO caused cell membrane disruption at 50 mg/L. Cytotoxicity tests showed that this was related to an increase in lactate dehydrogenase (LDH) release rate and a decrease in superoxide dismutase (SOD) activity. These new findings provide evidence that green synthesized rGO is toxic to microorganisms and that toxicity increased with rGO dose.
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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, China
| | - Chao Xue
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Shen Guo
- Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environment Science and Engineering, Fujian Normal University, Fuzhou, 350007, Fujian, China
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes Campus, Mawson Lakes, South Australia, 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, China.
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59
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Alemi F, Zarezadeh R, Sadigh AR, Hamishehkar H, Rahimi M, Majidinia M, Asemi Z, Ebrahimi-Kalan A, Yousefi B, Rashtchizadeh N. Graphene oxide and reduced graphene oxide: Efficient cargo platforms for cancer theranostics. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101974] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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60
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Deline AR, Frank BP, Smith CL, Sigmon LR, Wallace AN, Gallagher MJ, Goodwin DG, Durkin DP, Fairbrother DH. Influence of Oxygen-Containing Functional Groups on the Environmental Properties, Transformations, and Toxicity of Carbon Nanotubes. Chem Rev 2020; 120:11651-11697. [DOI: 10.1021/acs.chemrev.0c00351] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Alyssa R. Deline
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Benjamin P. Frank
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Casey L. Smith
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Leslie R. Sigmon
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Alexa N. Wallace
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Miranda J. Gallagher
- Department of Chemistry, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - David G. Goodwin
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - David P. Durkin
- Department of Chemistry, United States Naval Academy, 572M Holloway Road, Annapolis, Maryland 21402, United States
| | - D. Howard Fairbrother
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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61
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Zhang Z, Liu X, Wu J, Ren X, Li J. Insight into the removal of graphene oxide by nanoscale zero-valent iron. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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62
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Dong S, Cai W, Sheng L, Wang W, Liu H, Xia J. Aggregation behavior of graphitic C 3N 4 nanosheets in aqueous environment: Kinetics and mechanisms. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114646. [PMID: 33618479 DOI: 10.1016/j.envpol.2020.114646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 06/12/2023]
Abstract
The aggregation behaviors of graphitic carbon nitride (g-C3N4) nanosheets under various electrolytes and pH conditions were systematically investigated. The aggregation of g-C3N4 nanosheets was significantly enhanced with increasing electrolyte concentrations. The divalent electrolytes (CaCl2 and MgCl2) were more effective than monovalent electrolytes (NaCl and KCl) in promoting the aggregation of g-C3N4 nanosheets. At the same valence, cations with higher atomic weight were more effective in enhancing the aggregation of g-C3N4 nanosheets. The measured critical coagulation concentrations (CCC) of g-C3N4 nanosheets were 4.7 mM KCl, 9.2 mM NaCl, 1.0 mM CaCl2 and 1.9 mM MgCl2 at pH 6.0, which were lower than some of other two-dimensional nanoparticles. The CCC values of g-C3N4 nanosheets were decreased to 5.5 mM NaCl at pH 2.0, but increased to 29.0 mM NaCl and 2.1 mM CaCl2 at pH 10.0, indicating that the aggregation degree of g-C3N4 nanosheets was decreased with increasing pH. The Fe/Al hydrated complexes generated at the specific pH inhibited the aggregation of g-C3N4 nanosheets and enhanced the stability. Overall, findings from this study demonstrated that the electrolytes and pH conditions played important and combined roles on the aggregation of g-C3N4 nanosheets. In addition, the aggregation behaviors of g-C3N4 nanosheets could be well predicted with the DLVO theory.
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Affiliation(s)
- Shunan Dong
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China.
| | - Wangwei Cai
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Liting Sheng
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Weimu Wang
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Hui Liu
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
| | - Jihong Xia
- College of Agricultural Science and Engineering, Hohai University, Nanjing, 210098, China
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63
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Ma P, Chen W. Sulfide reduction can significantly enhance transport of biochar fine particles in saturated porous medium. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 263:114445. [PMID: 32251981 DOI: 10.1016/j.envpol.2020.114445] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 03/20/2020] [Accepted: 03/22/2020] [Indexed: 06/11/2023]
Abstract
The release of fine particles from biochar materials applied in the environment may have important environmental implications, such as mobilization of environmental contaminants. In natural environments biochar fine particles can undergo various transformation processes, which may change their surface chemistry and consequently, the mobility of the particles. Here, we show that sulfide reduction can significantly alter the transport of wheat-straw- and pine-wood-derived biochar fine particles in saturated porous media. Counterintuitively, the sulfide-reduced biochar particles exhibited greater mobility in artificial groundwater than their non-reduced counterparts, even though reduction led to decrease of surface charge negativity and increase of hydrophobicity (from the removal of surface O-functional groups), both should favor particle deposition, as predicted based on extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. Using transport experiments conducted in single-cation background solutions containing K+, Mg2+ or Ca2+ under different pH conditions, we show that the surprisingly greater mobility of sulfide-reduced biochar particles was attributable to the removal of surface carboxyl groups during reduction, as this markedly alleviated particle deposition through cation bridging, wherein Ca2+ acted as the bridging agent in linking the surface O-functional groups of biochar particles and quartz sand. These findings show the critical roles of surface properties in dictating the mobility of biochar fine particles and call for further understanding of their transport properties, which apparently cannot be simply extrapolated based on the findings of other (engineered) carbonaceous nanomaterials.
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Affiliation(s)
- Pengkun Ma
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Wei Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China.
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64
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Murastov G, Bogatova E, Brazovskiy K, Amin I, Lipovka A, Dogadina E, Cherepnyov A, Ananyeva A, Plotnikov E, Ryabov V, Rodriguez RD, Sheremet E. Flexible and water-stable graphene-based electrodes for long-term use in bioelectronics. Biosens Bioelectron 2020; 166:112426. [PMID: 32750676 DOI: 10.1016/j.bios.2020.112426] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 06/29/2020] [Accepted: 07/02/2020] [Indexed: 12/27/2022]
Abstract
We present the first demonstration of bioelectrodes made from laser-reduced graphene oxide (rGO) on flexible polyethylene terephthalate (PET) substrates that overcome two main issues: using hydrogel on skin interface with standard Ag/AgCl bioelectrodes vs. low signal to noise ratio with capacitance or dry electrodes. Today we develop a dry rGO bioelectrode technology with long-term stability for 100 h in harsh environments and when in contact with skin. Reliability tests in different buffer solutions with pH from 4.8 to 9.2 tested over 24 h showed the robustness of rGO electrodes. In terms of signal to noise ratio, our bioelectrodes performance is comparable to that of commercial ones. The bioelectrodes demonstrate an excellent signal to noise ratio, with a signal match of over 98% with respect to state-of-the-art electrodes used as a benchmark. We attribute the unique stability of our bioelectrodes to the rGO/PET interface modification and composite formation during laser processing used for GO reduction. The rGO/PET composite formation assertion is confirmed by mechanical stripping experiments and visual examination of re-exposed PET. The method developed here is simple, cost-effective, maskless, and can be scaled-up, allowing sustainable manufacture of arbitrary-shaped flexible electrodes for biomedical sensors and wearables.
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Affiliation(s)
- G Murastov
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - E Bogatova
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - K Brazovskiy
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - I Amin
- Van't Hoff Institute of Molecular Science, University of Amsterdam, Science Park 904, 1098XH, Amsterdam, Netherlands
| | - A Lipovka
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - E Dogadina
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - A Cherepnyov
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - A Ananyeva
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - E Plotnikov
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia
| | - V Ryabov
- Cardiology Research Institute, Tomsk National Research Medical Center, 111a Kievskaya Street 634012, Tomsk National Research Tomsk State University, 36 Lenina ave 634050, Siberian State Medical University, 2 Moscovskiy trakt, 634050, Tomsk, Russia
| | - R D Rodriguez
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia.
| | - E Sheremet
- Tomsk Polytechnic University, Lenina ave. 30, 634034, Tomsk, Russia.
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Candotto Carniel F, Fortuna L, Nepi M, Cai G, Del Casino C, Adami G, Bramini M, Bosi S, Flahaut E, Martín C, Vázquez E, Prato M, Tretiach M. Beyond graphene oxide acidity: Novel insights into graphene related materials effects on the sexual reproduction of seed plants. JOURNAL OF HAZARDOUS MATERIALS 2020; 393:122380. [PMID: 32126426 DOI: 10.1016/j.jhazmat.2020.122380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/14/2020] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
Graphene related materials (GRMs) are currently being used in products and devices of everyday life and this strongly increases the possibility of their ultimate release into the environment as waste items. GRMs have several effects on plants, and graphene oxide (GO) in particular, can affect pollen germination and tube growth due to its acidic properties. Despite the socio-economic importance of sexual reproduction in seed plants, the effect of GRMs on this process is still largely unknown. Here, Corylus avellana L. (common Hazel) pollen was germinated in-vitro with and without 1-100 μg mL-1 few-layer graphene (FLG), GO and reduced GO (rGO) to identify GRMs effects alternative to the acidification damage caused by GO. At 100 μg mL-1 both FLG and GO decreased pollen germination, however only GO negatively affected pollen tube growth. Furthermore, GO adsorbed about 10 % of the initial Ca2+ from germination media accounting for a further decrease in germination of 13 % at the pH created by GO. In addition, both FLG and GO altered the normal tip-focused reactive oxygen species (ROS) distribution along the pollen tube. The results provided here help to understand GRMs effect on the sexual reproduction of seed plants and to address future in-vivo studies.
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Affiliation(s)
- Fabio Candotto Carniel
- Department of Life Sciences, University of Trieste, via L. Giorgieri 10, I-34127, Trieste, Italy.
| | - Lorenzo Fortuna
- Department of Life Sciences, University of Trieste, via L. Giorgieri 10, I-34127, Trieste, Italy.
| | - Massimo Nepi
- Department of Life Sciences, University of Siena, via P. A. Mattioli 4, I-53100, Siena, Italy.
| | - Giampiero Cai
- Department of Life Sciences, University of Siena, via P. A. Mattioli 4, I-53100, Siena, Italy.
| | - Cecilia Del Casino
- Department of Life Sciences, University of Siena, via P. A. Mattioli 4, I-53100, Siena, Italy.
| | - Giampiero Adami
- Department of Chemical and Pharmaceutical Science, University of Trieste, via L. Giorgieri 1, I-34127, Trieste, Italy.
| | - Mattia Bramini
- Center for Synaptic Neuroscience, Italian Institute of Technology, Largo Rosanna Benzi 10, I-16132, Genova, Italy.
| | - Susanna Bosi
- Department of Chemical and Pharmaceutical Science, University of Trieste, via L. Giorgieri 1, I-34127, Trieste, Italy.
| | - Emmanuel Flahaut
- CIRIMAT, Université de Toulouse, CNRS, INPT, UPS, UMR CNRS-UPS-INP N° 5085, Université Toulouse 3 Paul Sabatier, Bât. CIRIMAT, 118, route de Narbonne, F-31062, Toulouse cedex 9, France.
| | - Cristina Martín
- Department of Organic Chemistry, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, Av. Camilo José Cela, s/n, E-13005, Ciudad Real, Spain.
| | - Ester Vázquez
- Department of Organic Chemistry, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, Av. Camilo José Cela, s/n, E-13005, Ciudad Real, Spain; Instituto Regional de Investigación Científica Aplicada (IRICA), Universidad de Castilla-La Mancha, E-13071, Ciudad Real, Spain.
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Science, University of Trieste, via L. Giorgieri 1, I-34127, Trieste, Italy; Carbon Nanobiotechnology Laboratory CIC BiomaGUNE, Paseo de Miramón 182, E-20009, Donostia-San Sebastian, Spain.
| | - Mauro Tretiach
- Department of Life Sciences, University of Trieste, via L. Giorgieri 10, I-34127, Trieste, Italy.
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Kim C, Lee J, Wang W, Fortner J. Organic Functionalized Graphene Oxide Behavior in Water. NANOMATERIALS 2020; 10:nano10061228. [PMID: 32599799 PMCID: PMC7353123 DOI: 10.3390/nano10061228] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 06/16/2020] [Accepted: 06/22/2020] [Indexed: 12/17/2022]
Abstract
Surface modified graphene oxide (GO) has received broad interest as a potential platform material for sensors, membranes, and sorbents, among other environmental applications. However, compared to parent (unmodified) GO, there is a dearth of information regarding the behavior of subsequently (secondary) modified GO, other than bulk natural organic matter (NOM) coating(s). Here, we systematically explore the critical role of organic functionalization with respect to GO stability in water. Specifically, we synthesized a matrix of GO-based materials considering a carefully chosen range of bound organic molecules (hydrophobic coatings: propylamine, tert-octylamine, and 1-adamantylamine; hydrophilic coatings: 3-amino-1-propanol and 3-amino-1-adamantanol), so that chemical structures and functional groups could be directly compared. GO (without organic functionalization) with varying oxidation extent(s) was also included for comparison. The material matrix was evaluated for aqueous stability by comparing critical coagulation concentration (CCC) as a function of varied ionic strength and type (NaCl, CaCl2, MgCl2, and MgSO4) at pH 7.0. Without surface derivatization (i.e., pristine GO), increased stability was observed with an increase in the GO oxidation state, which is supported by plate–plate Derjaguin, Landau, Verwey and Overbeek (DLVO) energy interaction analyses. For derivatized GO, we observed that hydrophilic additions (phi-GO) are relatively more stable than hydrophobic organic coated GO (pho-GO). We further explored this by altering a single OH group in the adamantane-x structure (3-amino-1-adamantanol vs. 1-adamantylamine). As expected, Ca2+ and monovalent co-ions play an important role in the aggregation of highly oxidized GO (HGO) and phi-GO, while the effects of divalent cations and co-ions were less significant for pho-GO. Taken together, this work provides new insight into the intricate dynamics of GO-based material stability in water as it relates to surface functionalization (surface energies) and ionic conditions including type of co- and counter-ion, valence, and concentration.
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Affiliation(s)
- Changwoo Kim
- Correspondence: (C.K.); (J.F.); Tel.: +1-314-650-0061 (C.K.); +1-314-935-9293 (J.F.)
| | | | | | - John Fortner
- Correspondence: (C.K.); (J.F.); Tel.: +1-314-650-0061 (C.K.); +1-314-935-9293 (J.F.)
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Ali J, Li Y, Wang X, Zhao J, Xi N, Zhang Z, Xia X. Climate-zone-dependent effect mechanism of humic acid and fulvic acid extracted from river sediments on aggregation behavior of graphene oxide. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:137682. [PMID: 32171139 DOI: 10.1016/j.scitotenv.2020.137682] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/18/2020] [Accepted: 03/01/2020] [Indexed: 06/10/2023]
Abstract
Climate factors could affect the physicochemical properties of dissolved organic matter (DOM) in river sediments, which potentially influence the stability of nanoparticles in natural waters. In this study, we extracted humic acid (HA) and fulvic acid (FA) from river sediments in different climate zones of China. Their effect with different concentrations (0.2 and 1 mg·C·L-1) on the aggregation kinetics of large (589 nm) and small graphene oxide (GO, 200 nm) in NaCl solutions was investigated. Both concentrations of HA/FA significantly inhibited the aggregation of small GO because of the steric forces rendered by DOM. For large GO, the inhibition effect of HA on aggregation was higher than FA because of the higher molecular weight, longer carbon chain length, and more structure complexity of HA. Interestingly, with 0.2 mg·C·L-1 HA and large GO, Makou in Subtropical monsoon climate zone decreased the aggregation rate more significantly due to its larger molecular weight, while, Maqin in the Plateau and mountain (PM) climate zone with smaller molecular weight and greater hydrophobicity showed lower inhibition effect on the aggregation. One mg·C·L-1 FA with high polarity from Tangke in PM climate zone and Panjin from Temperate monsoon climate zone showed more stability ability towards large GO. Derjaguin-landau-verwey-overbeek (DLVO) theory indicated that the interaction energy barrier between GO particles dependent on physicochemical characteristics of DOM and GO size. Understanding the climate-zone-dependent effect of sediment DOM on stability of GO is essential for anticipating its fate in natural systems.
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Affiliation(s)
- Jawad Ali
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Yang Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China.
| | - Xinjie Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Jian Zhao
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Nannan Xi
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Zhenrui Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Xinghui Xia
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
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He Y, Liu Y, Guo F, Pang K, Fang B, Wang Y, Chang D, Xu Z, Gao C. Dynamic dispersion stability of graphene oxide with metal ions. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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69
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Gallegos-Pérez WR, Reynosa-Martínez AC, Soto-Ortiz C, Angélica Álvarez-Lemus M, Barroso-Flores J, García Montalvo V, López-Honorato E. Effect of UV radiation on the structure of graphene oxide in water and its impact on cytotoxicity and As(III) adsorption. CHEMOSPHERE 2020; 249:126160. [PMID: 32065996 DOI: 10.1016/j.chemosphere.2020.126160] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 02/04/2020] [Accepted: 02/08/2020] [Indexed: 06/10/2023]
Abstract
Graphene oxide (GO) is widely used in different applications, however once released into the environment it can change its structure and affect the transport of important contaminants such as arsenic. In this work we show that UV radiation, even in the range of 28-74 μW/cm2 of irradiance up to 120 h of exposure, can induce important changes in the structure of graphene oxide, by eliminating -OH and CO functional groups. This reduction affected the stability of graphene oxide in water by decreasing its zeta potential from -41 to -37 mV at pH=7 with the increase of the exposure time. Our results showed that after 24 and 120 h of UV exposure, As(III) adsorption capacity decreased from 5 mg/g to 4.7 and 3.8 mg/g, respectively, suggesting a lower capacity to transport contaminants with time. Computer modelling showed that even a degraded GO structure can have an interaction energy of 223.84 kJ/mol with H3AsO3. Furthermore, we observed that the cytotoxicity of graphene oxide changed after being irradiated at 74 μW/cm2 for 120 h, showing 20% more cell viability compared to as-produced GO. Our results stress the importance of considering the microstructural and compositional changes that GO undergoes even under low irradiance and short periods, when studying its fate and behavior in the environment and possible applications in water treatment.
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Affiliation(s)
- Waldo Roberto Gallegos-Pérez
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe, Coahuila, 25900, Mexico
| | - Ana Cecilia Reynosa-Martínez
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe, Coahuila, 25900, Mexico
| | - Claudia Soto-Ortiz
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe, Coahuila, 25900, Mexico
| | | | - Joaquín Barroso-Flores
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco Km 14.5, Unidad San Cayetano, Toluca, Estado de México, 50200, Mexico; Instituto de Química. Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, CD, MX, 04510, Mexico
| | - Verónica García Montalvo
- Instituto de Química. Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, CD, MX, 04510, Mexico
| | - Eddie López-Honorato
- Centro de Investigación y de Estudios Avanzados del IPN, Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial, Ramos Arizpe, Coahuila, 25900, Mexico.
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Fang J, Cheng L, Hameed R, Jin L, Wang D, Owens G, Lin D. Release and stability of water dispersible biochar colloids in aquatic environments: Effects of pyrolysis temperature, particle size, and solution chemistry. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:114037. [PMID: 32006888 DOI: 10.1016/j.envpol.2020.114037] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 12/27/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Pathways for the physical disintegration of biochar (BC) and the release of water dispersible BC colloids (WDBC) have received much attention due to their unique impacts on carbon loss and contaminant. However, the current understanding of the mechanisms involved in WDBC formation and associated influencing factors is rather limited. This study systematically explored the effects of pyrolysis temperature, initial particle size, and solution chemistry on WDBC formation in aqueous solutions and examined the formation and colloidal stability of WDBC in natural solutions. Results showed that pyrolysis temperature determined the abrasion resistance of pyrolyzed BC, and the submicron fragment rate decreased in the order 400 °C (BC400) > 700 °C (BC700) > 200 °C (BC200). The WDBC yield decreased in the order BC400 (77.5-331 mg g-1) > BC700 (33.5-173 mg g-1) > BC200 (16.8-125 mg g-1) depending on BC size at a solution ionic strength (IS) ≤ 1 mM, which was positively correlated with the submicron fragment rate of bulk BC. With the exception of BC200, increasing IS (0.1-20 mM) and decreasing pH (3.0-10.0) significantly inhibited WDBC yield. Release and sedimentation dominated the WDBC formation processes with the former being more susceptible to solution chemistry. Derjaguin-Landau-Verwey-Overbeek interactions properly explained the effect of IS on WDBC from BC400 and BC700, while the steric resistance of abundant dissolved organic carbon on BC200 was mainly responsible for the high formation of WDBC at high IS (20-50 mM). WDBC had high colloidal stability and could form and stabilize well in natural surface waters and soil solutions, suggesting the relevant risk of long-distance migration of WDBC in environments. These findings represent new knowledge regarding the physical decomposition and the fate of BC in the environment.
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Affiliation(s)
- Jing Fang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China
| | - Leilei Cheng
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China
| | - Rashida Hameed
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, PR China
| | - Liang Jin
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China
| | - Dengjun Wang
- National Research Council Resident Research Associate, United States Environmental Protection Agency, Ada, OK 74820, United States
| | - Gary Owens
- Environmental Contaminants Group, Future Industries Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Daohui Lin
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Zhejiang University, Hangzhou 310058, PR China.
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71
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Alam I, Guiney LM, Hersam MC, Chowdhury I. Pressure-driven water transport behavior and antifouling performance of two-dimensional nanomaterial laminated membranes. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2019.117812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Kang Y, Liu J, Yin S, Jiang Y, Feng X, Wu J, Zhang Y, Chen A, Zhang Y, Shao L. Oxidation of Reduced Graphene Oxide via Cellular Redox Signaling Modulates Actin-Mediated Neurotransmission. ACS NANO 2020; 14:3059-3074. [PMID: 32057235 DOI: 10.1021/acsnano.9b08078] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Neurotransmission is the basis of brain functions, and controllable neurotransmission tuning constitutes an attractive approach for interventions in a wide range of neurologic disorders and for synapse-based therapeutic treatments. Graphene-family nanomaterials (GFNs) offer promising advantages for biomedical applications, particularly in neurology. Our study suggests that reduced graphene oxide (rGO) serves as a neurotransmission modulator and reveals that the cellular oxidation of rGO plays a crucial role in this effect. We found that rGO could be oxidized via cellular reactive oxygen species (ROS), as evidenced by an increased number of oxygen-containing functional groups on the rGO surface. Cellular redox signaling, which involves NADPH oxidases and mitochondria, was initiated and subsequently intensified rGO oxidation. The study further shows that the blockage of synaptic vesicle docking and fusion induced through a disturbance of actin dynamics is the underlying mechanism through which oxidized rGO exerts depressant effects on neurotransmission. Importantly, this depressant effect could be modulated by restricting the cellular ROS levels and stabilizing the actin dynamics. Taken together, our results identify the complicated biological effects of rGO as a controlled neurotransmission modulator and can provide helpful information for the future design of graphene materials for neurobiological applications.
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Affiliation(s)
- Yiyuan Kang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou 510515, China
| | - Jia Liu
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Suhan Yin
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yanping Jiang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Xiaoli Feng
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Junrong Wu
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yanli Zhang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Aijie Chen
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Yaqing Zhang
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Longquan Shao
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou 510515, China
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73
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Xie Y, Gao Y, Ren X, Song G, Alsaedi A, Hayat T, Chen C. Colloidal Behaviors of Two-Dimensional Titanium Carbide in Natural Surface Waters: The Role of Solution Chemistry. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3353-3362. [PMID: 32083478 DOI: 10.1021/acs.est.9b05372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although two-dimensional titanium carbide (Ti3C2Tx MXene) has emerged as a shining star material in various communities, its environmental behaviors and fate remain unknown. Herein, the colloidal properties and stability of Ti3C2Tx MXene are explored in aquatic systems for the first time, considering the roles of solution chemistry conditions (e.g., pH, ionic types, and strength). It was found that pH had no effect on the stability of Ti3C2Tx in the range of 5.0-11.0, whereas ionic valence and concentrations displayed significant effects on the aggregation behavior of Ti3C2Tx. By employing time-resolved dynamic light scattering measurements, the critical coagulation concentration (CCC) value of Ti3C2Tx was determined to be 12 mM for NaCl. The divalent cations Ca2+ and Mg2+ exhibited higher destabilizing capacity to Ti3C2Tx, as evidenced by the lower CCC values (0.3 and 0.4 mM for CaCl2 and MgCl2, respectively) and faster coagulation rates. Long-term stability studies implied that Ti3C2Tx MXene was less likely to be transported over long distances in the synthetic or natural waters. These findings provided significant insights into the fate and transport of Ti3C2Tx in the aquatic environment.
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Affiliation(s)
- Yi Xie
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, PR China
| | - Yang Gao
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
| | - Xuemei Ren
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Ahmed Alsaedi
- NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Tasawar Hayat
- NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Changlun Chen
- Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, PR China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, PR China
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74
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Shams M, Alam I, Chowdhury I. Aggregation and stability of nanoscale plastics in aquatic environment. WATER RESEARCH 2020; 171:115401. [PMID: 31884379 DOI: 10.1016/j.watres.2019.115401] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 06/10/2023]
Abstract
The widespread use and release of plastics in nature have raised global concerns about their impact on public health and the environment. While much research has been conducted on macro- and micro-sized plastics, the fate of nanoscale plastics remains unexplored. In this study, the aggregation kinetics and stability of polyethylene and polystyrene nanoscale plastics were investigated over a wide range of aquatic chemistries (pH, salt types (NaCl, CaCl2, MgCl2), ionic strength) relevant to the natural environment. Results showed that salt types and ionic strength had significant effects on the stability of both polyethylene and polystyrene nanoscale plastics, while pH had none. Aggregation and stability of both polyethylene and polystyrene nanoscale plastics in the aquatic environment followed colloidal theory (DLVO theory and Schulze-Hardy rule), similar to other colloidal particles. The critical coagulation concentration (CCC) values of polyethylene nanoscale plastics were lower for CaCl2 (0.1 mM) compared to NaCl (80 mM) and MgCl2 (3 mM). Similarly, CCC values of polystyrene nanospheres were 10 mM for CaCl2, 800 mM for NaCl and 25 mM for MgCl2. It implies that CaCl2 destabilized both polyethylene and polystyrene nanoscale plastics more aggressively than NaCl and MgCl2. Moreover, polystyrene nanospheres are more stable in the aquatic environment than polyethylene nanoscale plastics. However, natural organic matter improved the stability of polyethylene nanoscale plastics in water primarily due to steric repulsion, increasing CCC values to 0.4 mM, 120 mM and 8 mM for CaCl2, NaCl and MgCl2 respectively. Stability studies with various water conditions demonstrated that polyethylene nanoscale plastics will be fairly stable in the natural surface waters. Conversely, synthetic surface water, wastewater, seawater and groundwater rapidly destabilized polyethylene nanoscale plastics. Overall, our findings indicate that significant aqueous transport of nanoscale plastics will be possible in natural surface waters.
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Affiliation(s)
- Mehnaz Shams
- Department of Civil & Environmental Engineering, Washington State University, Pullman, WA, 99164, USA
| | - Iftaykhairul Alam
- Department of Civil & Environmental Engineering, Washington State University, Pullman, WA, 99164, USA
| | - Indranil Chowdhury
- Department of Civil & Environmental Engineering, Washington State University, Pullman, WA, 99164, USA.
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Raslan A, Saenz Del Burgo L, Ciriza J, Pedraz JL. Graphene oxide and reduced graphene oxide-based scaffolds in regenerative medicine. Int J Pharm 2020; 580:119226. [PMID: 32179151 DOI: 10.1016/j.ijpharm.2020.119226] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 03/09/2020] [Accepted: 03/12/2020] [Indexed: 02/07/2023]
Abstract
There is a vast and rapid increase in the applications of graphene oxide (GO) and reduced graphene oxide (rGO) in the biomedical field, including drug delivery, bio-sensing, and diagnostic tools. Among all the applications, the GO and rGO-based scaffolds are a very promising system that have attracted attention because of their great clinical projection in tissue regeneration therapies. Both GO and rGO have shown a strong impact on the proliferation and differentiation of implemented stem cells, but still need to overcome several challenges, such as cytotoxicity, biodistribution, biotransformation or immune response. However, there are still controversial hypothesises regarding the mechanisms involved in these issues that should be clarified in order to improve the applications of these compounds. 3D-scaffolds can help in solving some of those limitations when moving into preclinical studies in regenerative medicine. In this review, we will describe the application of GO and rGO within 3D scaffolds in bone, cardiac and neural regenerative medicine after analyzing the aforementioned challenges.
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Affiliation(s)
- Ahmed Raslan
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain
| | - Laura Saenz Del Burgo
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain
| | - Jesús Ciriza
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain.
| | - Jose Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of the Basque Country UPV/EHU, Vitoria-Gasteiz 01006, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials, and Nanomedicine, CIBER-BBN, Spain.
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Medeiros AMZD, Côa F, Alves OL, Teodoro Martinez DS, Barbieri E. Metabolic effects in the freshwater fish Geophagus iporangensis in response to single and combined exposure to graphene oxide and trace elements. CHEMOSPHERE 2020; 243:125316. [PMID: 31733537 DOI: 10.1016/j.chemosphere.2019.125316] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 10/17/2019] [Accepted: 11/04/2019] [Indexed: 05/22/2023]
Abstract
Graphene oxide (GO) is part of a new set of nanomaterials with particular characteristics related to its nanoscale size. Due to this feature, it presents high reactivity and other contaminants present in the environment could bind to them and affect its intrinsic toxicity. The metabolic effects of such nanomaterials and their combination with two common pollutants, zinc and cadmium, on the freshwater fish Geophagus iporangensis are analyzed. Moreover, metabolic rate and ammonia excretion were used as bioindicators to measure metabolic changes. Fishes were exposed for 24 h in filtered tap water to different concentrations of GO (0.5; 1.0; 2.0 and 4.0 mg L-1), Zn (0.5; 1.0; 2.0; 4.0 and 10.0 mg L-1) and Cd (0.1; 0.5; 1.0; 2.0 and 4.0 mg L-1). Combined effects were verified using the same concentrations of trace elements added to 1.0 mg L-1 of GO. Exposure to GO and Cd resulted in a decrease of metabolic rate in G. iporangensis, by about 30% compared to control means, in the highest concentration tested (4.0 mg L-1). However, zinc exposure in the highest concentration (10 mg L-1) raised metabolic rate to around three times that of the control group. Ammonia excretion was not affected by exposure to GO and Cd. In contrast, exposure to Zn at 10 mg L-1 raised the rate to around 47%. The combined exposure of GO and Zn intensified the effects of the trace element, inducing responses in both biomarkers at lower concentrations and demonstrating that the interaction between elements increases zinc's effects. The combination Cd + GO only affects metabolic rate. Thus, this metabolic rate alone reveals that combined exposure potentiates effects of trace elements on fish metabolism.
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Affiliation(s)
| | - Francine Côa
- Instituto de Pesca-SP-APTA-SAA-Governo do Estado de São Paulo, Av. Prof. Besnard s/n, CEP. 11990-000, Cananéia, SP, Brazil
| | - Oswaldo Luiz Alves
- Laboratório de Química de Estado Sólido (LQES), Instituto de Química, UNICAMP, Campinas, SP, Brazil
| | - Diego Stéfani Teodoro Martinez
- Laboratório Nacional de Nanotecnologia (LNNano), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Campinas, SP, Brazil
| | - Edison Barbieri
- Instituto de Pesca-SP-APTA-SAA-Governo do Estado de São Paulo, Av. Prof. Besnard s/n, CEP. 11990-000, Cananéia, SP, Brazil.
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Lu L, Chen B. Biochar-amendment-reduced cotransport of graphene oxide nanoparticles and dimethyl phthalate in saturated porous media. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135094. [PMID: 31837545 DOI: 10.1016/j.scitotenv.2019.135094] [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: 07/07/2019] [Revised: 10/17/2019] [Accepted: 10/19/2019] [Indexed: 06/10/2023]
Abstract
Production and application of graphene oxide (GO) and biochar for water and soil treatment is steadily growing, driving the necessity to understand the cotransport behavior of contaminants and GO nanoparticles in porous media and the possible effect of biochar to reduce their cotransport. The cotransport of GO nanoparticles and dimethyl phthalate (DMP) as a model in a sand column and biochar-amended sand column (biochar column) was compared. The transport of DMP in the test columns was independent of the solution ionic strength (IS), while the transport of GO decreased with increased IS due to the enhanced aggregation of GO nanoparticles. The sand column had no retention capacity (less than 1%) for DMP, while the biochar column had significantly increased retention of DMP (100%). The retention of GO in the biochar column was significantly higher than that of the sand column because biochar can improve the roughness of the media and adsorb GO via π-π interactions. Under low-IS conditions, GO facilitated DMP transport by providing vehicles and adsorption sites (vehicle effect). Due to reversible adsorption-desorption, the adsorbed DMP on GO could be released, resulting in tailing during the flushing phase. The vehicle effect of GO on DMP transport was significantly weakened in the biochar columns, and DMP tailing during the flushing phase was not observed in the biochar columns, which was attributed to the strong retention/adsorption of the biochar columns for both GO and DMP, higher affinity of DMP on biochar than GO, and desorption hysteresis of DMP on biochar. These observations are important for evaluating the potential role of biochar in soil and water remediation, as well as mitigating the health risks of GO and organic contaminants in the environment.
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Affiliation(s)
- Lun Lu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollutant Process and Control, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollutant Process and Control, Zhejiang University, Hangzhou, Zhejiang 310058, China.
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78
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Gao Y, Ren X, Song G, Chen D, Zhang X, Chen C. Colloidal properties and stability of UV-transformed graphene oxide in aqueous solutions: The role of disorder degree. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121097. [PMID: 31476722 DOI: 10.1016/j.jhazmat.2019.121097] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/18/2019] [Accepted: 08/23/2019] [Indexed: 06/10/2023]
Abstract
Motivated by the use of ultraviolet (UV) radiation in the disinfection processes of drinking and waste water treatment plants, this study explores the colloidal properties and stability of UV irradiated graphene oxide (GO) by using the batch technique and time-resolved dynamic light scattering over a wide range of salt types (NaCl, MgCl2, and CaCl2) and ionic strength relevant to engineered and natural systems. The results show that the UV irradiation time has an important impact on the physicochemical properties of GO and consequently on its colloidal properties and stability. The aggregation kinetics, attachment efficiency and critical coagulation concentration (CCC) values of UV irradiated GO are obtained for the first time. By correlating CCC values with physicochemical properties, we find that the disorder degree plays a more important role in colloidal properties and stability of UV irradiated GO than oxygen containing functional groups. The findings are valuable for environmental fate assessments on various families of functionalized GO.
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Affiliation(s)
- Yang Gao
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; University of Science and Technology of China, Hefei, 230000, PR China
| | - Xuemei Ren
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China.
| | - Gang Song
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, PR China
| | - Diyun Chen
- Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou University, Guangzhou, 510006, PR China
| | - Xiaodong Zhang
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China
| | - Changlun Chen
- CAS Key Laboratory of Photovoltaic and Energy Conservation Materials, Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, 230031, PR China; Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, 215123, PR China
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79
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Choe G, Oh S, Seok JM, Park SA, Lee JY. Graphene oxide/alginate composites as novel bioinks for three-dimensional mesenchymal stem cell printing and bone regeneration applications. NANOSCALE 2019; 11:23275-23285. [PMID: 31782460 DOI: 10.1039/c9nr07643c] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three-dimensional (3D) cell printing is a versatile technique enabling the creation of 3D constructs containing hydrogel and cells in the desired shape or pattern. Bioinks exhibiting appropriate mechanical properties and biological activities to support cell growth and/or differentiation toward a specific lineage play critical roles in 3D cell printing and tissue engineering applications. Herein, we explored alginate/graphene oxide (GO) composites as bioinks for their potential to improve printability, structural stability, and osteogenic activities for osteogenic tissue engineering applications. The addition of GO (0.05-1.0 mg mL-1) to 3% alginate significantly enhanced the printing performances of the alginate bioink. In addition, mesenchymal stem cells (MSCs) printed with alginate/GO showed good proliferation and higher survival in an oxidative stress environment. The 3D scaffolds printed with MSCs and alginate/GO demonstrated significantly enhanced osteogenic differentiation compared with those printed with MSCs and alginate. Overall, a bioink of 3% alginate and 0.5 mg mL-1 GO showed the most balanced characteristics in terms of printability, structural stability, and osteogenic induction of the printed MSCs. Alginate/GO composite bioinks will be useful for bioprinting research for various tissue engineering applications.
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Affiliation(s)
- Goeun Choe
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
| | - Seulgi Oh
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
| | - Ji Min Seok
- Department of Nature-Inspired Nanoconvergence Systems, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea.
| | - Su A Park
- Department of Nature-Inspired Nanoconvergence Systems, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea.
| | - Jae Young Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
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80
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Dong Z, Zhu L, Zhang W, Huang R, Lv X, Jing X, Yang Z, Wang J, Qiu Y. Role of surface functionalities of nanoplastics on their transport in seawater-saturated sea sand. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 255:113177. [PMID: 31521995 DOI: 10.1016/j.envpol.2019.113177] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/22/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
The transport and retention of nanoplastics (NP, 200 nm nanopolystyrene) functionalized with surface carboxyl (NPC), sulfonic (NPS), low-density amino (negatively charged, NPA-), and high-density amino (positively charged, NPA+) groups in seawater-saturated sand with/without humic acid were examined to explore the role of NP surface functionalities. The mass percentages of NP recovered from the effluent (Meff) with a salinity of 35 practical salinity units (PSU) were ranked as follows: NPC (19.69%) > NPS (16.37%) > NPA+ (13.33%) > NPA- (9.78%). The homoaggregation of NPS and NPA- was observed in seawater. The transport of NPA- exhibited a ripening phenomenon (i.e., a decrease in the transport rate with time) due to the high attraction of NP with previously deposited NP, whereas monodispersed NPA+ presented a low Meff value because of the electrostatic attraction between NPA+ and negatively charged sand. Retention experiments showed that the majority of NPC, NPS and NPA+ accumulated in a monolayer on the sand surface, whereas NPA- accumulated in multiple layers. Suwannee River humic acid (SRHA) could remarkably improve the transportability of NPC, NPS, and NPA- by increasing steric repulsion. The strong attraction between NPA+ and the deposited NPA+ in the presence of SRHA triggered the weak ripening phenomenon. As seawater salinity decreased from 35 PSU to 3.5 PSU, the increase in electrostatic repulsion of NP-NP and NP-sand enhanced the transport of NPC, NPS, and NPA-, and the ripening of NPA- breakthrough curves disappeared. In deionized water, NPC, NPS, and NPA- achieved complete column breakthrough because the electrostatic repulsion between NP and sand intensified. However, the Meff values of NPA+ in 3.5 PSU seawater and deionized water presented limited increments of 15.49% and 23.67%, respectively. These results indicated that the fate of NP in sandy marine environments were strongly affected by NP surface functionalities, seawater salinity, and coexisting SRHA.
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Affiliation(s)
- Zhiqiang Dong
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Ling Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Wen Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China
| | - Rui Huang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - XiangWei Lv
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Xinyu Jing
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Zhenglong Yang
- School of Materials Science and Engineering, Jiading Campus, Tongji University, Shanghai, 201804, China
| | - Junliang Wang
- College of the Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yuping Qiu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China.
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81
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Ouyang S, Li K, Zhou Q, Hu X. Widely distributed nanocolloids in water regulate the fate and risk of graphene oxide. WATER RESEARCH 2019; 165:114987. [PMID: 31450222 DOI: 10.1016/j.watres.2019.114987] [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: 05/25/2019] [Revised: 07/26/2019] [Accepted: 08/13/2019] [Indexed: 06/10/2023]
Abstract
The environmental behaviors and risks associated with graphene oxide (GO, a popular 2D nanomaterial) have attracted considerable attention. GO released to aquatic systems will most likely interact with ubiquitous nanocolloids (Nc) in surface water. However, the effects of Nc on the fate and risk of GO remain largely unknown in water. Herein, the binding of Nc onto GO was investigated via electron microscopy, electron paramagnetic resonance, 2D correlation spectroscopy and biolayer interferometry. The results revealed that electron charge transfers, hydrophilic effects and π-π stacking contributed to a strong affinity (KD = 5.6 nM) and high adsorption capacity (159.8 mg/g) of Nc onto the GO surface. Moreover, GO nanosheets transformed to a scroll morphology or multiple GO particles bridging by Nc, which remarkably reduced the aggregation and sedimentation rates after binding with Nc. Interestingly, co-exposure with Nc greatly alleviated the toxicity (e.g., tail malformation, yolk sac edema and oxidative stress) of GO to zebrafish embryos. Morphological and structural alterations of GO after binding to Nc contributed to the mechanisms for the antagonistic effects on the zebrafish embryos toxicity. The present work provides insights into the environmental fate and risk of GO by ubiquitous Nc in natural water.
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Affiliation(s)
- Shaohu Ouyang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Kaiwen Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China
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82
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Tite T, Chiticaru EA, Burns JS, Ioniţă M. Impact of nano-morphology, lattice defects and conductivity on the performance of graphene based electrochemical biosensors. J Nanobiotechnology 2019; 17:101. [PMID: 31581949 PMCID: PMC6777027 DOI: 10.1186/s12951-019-0535-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 09/24/2019] [Indexed: 02/06/2023] Open
Abstract
Diverse properties of graphenic materials have been extensively explored to determine properties that make good electrochemical nanomaterial-based biosensors. These are reviewed by critically examining the influence of graphene nano-morphology, lattice defects and conductivity. Stability, reproducibility and fabrication are discussed together with sensitivity and selectivity. We provide an outlook on future directions for building efficient electrochemical biosensors.
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Affiliation(s)
- Teddy Tite
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
| | - Elena Alina Chiticaru
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
| | - Jorge S. Burns
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
| | - Mariana Ioniţă
- Faculty of Medical Engineering, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
- Advanced Polymer Materials Group, University Politehnica of Bucharest, Gh Polizu 1-7, 011061 Bucharest, Romania
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83
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Clemente Z, Silva GH, de Souza Nunes MC, Martinez DST, Maurer-Morelli CV, Thomaz AA, Castro VLSS. Exploring the mechanisms of graphene oxide behavioral and morphological changes in zebrafish. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:30508-30523. [PMID: 31463743 DOI: 10.1007/s11356-019-05870-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 06/28/2019] [Indexed: 06/10/2023]
Abstract
The presence of natural organic matter such as humic acid (HA) can influence the behavior of graphene oxide (GO) in the aquatic environment. In this study, zebrafish embryos were analyzed after 5 and 7 days of exposure to GO (100 mg L-1) and HA (20 mg L-1) alone or together. The results indicated that, regardless of the presence of HA, larvae exposed to GO for 5 days showed an increase in locomotor activity, reduction in the yolk sac size, and total length and inhibition of AChE activity, but there was no difference in enzyme expression. The statistical analysis indicated that the reductions in total larval length, yolk sac size, and AChE activity in larvae exposed to GO persisted in relation to the control group, but there was a recovery of these parameters in groups also exposed to HA. Larvae exposed to GO for 7 days did not show significant differences in locomotor activity, but the RT-PCR gene expression analysis evidenced an increase in the AChE expression. Since the embryos exposed to GO showed a reduction in overall length, they were submitted to confocal microscopy and their muscle tissue configuration investigated. No changes were observed in the muscle tissue. The results indicated that HA is associated with the toxicity risk modulation by GO and that some compensatory homeostasis mechanisms may be involved in the developmental effects observed in zebrafish.
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Affiliation(s)
- Zaira Clemente
- Laboratory of Ecotoxicology and Biosafety, Embrapa Environment, Jaguariúna, São Paulo, 13820-000, Brazil.
- Brazilian National Nanotechnology Laboratory (LNNano), Brazilian Center for Research on Energy and Materials (CNPEM), Campinas, São Paulo, 13083-970, Brazil.
| | - Gabriela Helena Silva
- Laboratory of Ecotoxicology and Biosafety, Embrapa Environment, Jaguariúna, São Paulo, 13820-000, Brazil
- Brazilian National Nanotechnology Laboratory (LNNano), Brazilian Center for Research on Energy and Materials (CNPEM), Campinas, São Paulo, 13083-970, Brazil
- Center for Nuclear Energy in Agriculture (CENA), University of São Paulo (USP), Piracicaba, São Paulo, 13416-000, Brazil
| | - Miriam Celi de Souza Nunes
- Department of Medical Genetics, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, São Paulo, 13087-883, Brazil
| | - Diego Stéfani Teodoro Martinez
- Brazilian National Nanotechnology Laboratory (LNNano), Brazilian Center for Research on Energy and Materials (CNPEM), Campinas, São Paulo, 13083-970, Brazil
- Center for Nuclear Energy in Agriculture (CENA), University of São Paulo (USP), Piracicaba, São Paulo, 13416-000, Brazil
| | - Claudia Vianna Maurer-Morelli
- Department of Medical Genetics, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, São Paulo, 13087-883, Brazil
| | - Andre Alexandre Thomaz
- Department of Quantum Electronics, Institute of Physics "Gleb Wataghin", University of Campinas (UNICAMP), Campinas, São Paulo, 13083-859, Brazil
- National Institute of Photonics Applied to Cell Biology (INFABIC), University of Campinas (UNICAMP), Campinas, São Paulo, 13083-859, Brazil
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84
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Liu X, Yan C, Chen KL. Adsorption of Human Serum Albumin on Graphene Oxide: Implications for Protein Corona Formation and Conformation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:8631-8639. [PMID: 30511839 DOI: 10.1021/acs.est.8b03451] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The influence of solution chemistry on the adsorption of human serum albumin (HSA) proteins on graphene oxide (GO) was investigated through batch adsorption experiments and the use of a quartz crystal microbalance with dissipation (QCM-D). The conformation of HSA layers on GO was also examined with the QCM-D. Our results show that an increase in ionic strength under neutral pH conditions resulted in stronger binding between HSA and GO, as well as more compact HSA layers on GO, emphasizing the key role of electrostatic interactions in controlling HSA-GO interactions. Calcium ions also facilitated HSA adsorption likely through charge neutralization and bridging effect. At physiological ionic strength conditions (150 mM), maximum HSA adsorption was observed at the isoelectric point of HSA (4.7). Under acidic conditions, the adsorption of HSA on GO led to the formation of protein layers with a high degree of fluidity due to the extended conformation of HSA. Finally, the attachment of GO to a supported lipid bilayer that was composed of zwitterionic 1,2-dioleoyl-sn-glycero-3-phosphocholine, a model for cell membranes, was reduced in the presence of protein coronas. This reduction in GO attachment was influenced by the conformation of the protein coronas on GO.
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Affiliation(s)
- Xitong Liu
- Department of Environmental Health and Engineering , Johns Hopkins University , Baltimore , Maryland 21218-2686 , United States
| | - Chenxu Yan
- Department of Environmental Health and Engineering , Johns Hopkins University , Baltimore , Maryland 21218-2686 , United States
| | - Kai Loon Chen
- Department of Environmental Health and Engineering , Johns Hopkins University , Baltimore , Maryland 21218-2686 , United States
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85
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Bangeppagari M, Park SH, Kundapur RR, Lee SJ. Graphene oxide induces cardiovascular defects in developing zebrafish (Danio rerio) embryo model: In-vivo toxicity assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 673:810-820. [PMID: 31005017 DOI: 10.1016/j.scitotenv.2019.04.082] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/01/2019] [Accepted: 04/06/2019] [Indexed: 06/09/2023]
Abstract
Graphene oxide (GO) has wide engineering applications in various areas, including electronics, energy storage, pharmaceuticals, nanomedicine, environmental remediation and biotechnology, because of its unique physico-chemical properties. In the present study, the risk-related information of GO was evaluated to examine the potential ecological and health risks of developmental toxicity. Although the overall developmental toxicity of GO has been well characterized in zebrafish, however, its release effect at a certain concentration of living organisms with specific cardiovascular defects remains largely elusive. Therefore, this study was conducted to further evaluate the toxicity of GO on embryonic development and cardiovascular defects in zebrafish embryos used as an in-vivo animal model. As a result, the presence of GO at a small concentration (0.1-0.3 mg/mL) does not affect the embryonic development. However, GO at higher concentrations (0.4-1 mg/mL) induces significant embryonic mortality, increase heartbeat, delayed hatching, cardiotoxicity, cardiovascular defects, retardation of cardiac looping, increased apoptosis and decreased hemoglobinization. These results provide valuable information that can be used to study the eco-toxicological effects of GO for assessing its bio-safety according to environmental concentration. In addition, the present results would also be usefully utilized for understanding the environmental risks associated with GO on human health in general.
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Affiliation(s)
- Manjunatha Bangeppagari
- Center for Biofluid and Biomimic Research, Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea
| | - Sung Ho Park
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea
| | | | - Sang Joon Lee
- Center for Biofluid and Biomimic Research, Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea; Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, South Korea.
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86
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Lehner BAE, Janssen VAEC, Spiesz EM, Benz D, Brouns SJJ, Meyer AS, van der Zant HSJ. Creation of Conductive Graphene Materials by Bacterial Reduction Using Shewanella Oneidensis. ChemistryOpen 2019; 8:888-895. [PMID: 31312588 PMCID: PMC6610442 DOI: 10.1002/open.201900186] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Indexed: 12/11/2022] Open
Abstract
Graphene's maximized surface-to-volume ratio, high conductance, mechanical strength, and flexibility make it a promising nanomaterial. However, large-scale graphene production is typically cost-intensive. This manuscript describes a microbial reduction approach for producing graphene that utilizes the bacterium Shewanella oneidensis in combination with modern nanotechnology to enable a low-cost, large-scale production method. The bacterial reduction approach presented in this paper increases the conductance of single graphene oxide flakes as well as bulk graphene oxide sheets by 2.1 to 2.7 orders of magnitude respectively while simultaneously retaining a high surface-area-to-thickness ratio. Shewanella-mediated reduction was employed in conjunction with electron-beam lithography to reduce one surface of individual graphene oxide flakes. This methodology yielded conducting flakes with differing functionalization on the top and bottom faces. Therefore, microbial reduction of graphene oxide enables the development and up-scaling of new types of graphene-based materials and devices with a variety of applications including nano-composites, conductive inks, and biosensors, while avoiding usage of hazardous, environmentally-unfriendly chemicals.
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Affiliation(s)
- Benjamin A. E. Lehner
- Department of BionanoscienceDelft University of TechnologyVan der Maasweg 92629 HZ DelftThe Netherlands
| | - Vera A. E. C. Janssen
- Department of Quantum NanoscienceDelft University of TechnologyLorentzweg 12628 CJ DelftNetherlands
| | - Ewa M. Spiesz
- Department of BionanoscienceDelft University of TechnologyVan der Maasweg 92629 HZ DelftThe Netherlands
| | - Dominik Benz
- Department of Chemical EngineeringDelft University of TechnologyVan der Maasweg 92629 HZ DelftThe Netherlands
| | - Stan J. J. Brouns
- Department of BionanoscienceDelft University of TechnologyVan der Maasweg 92629 HZ DelftThe Netherlands
| | - Anne S. Meyer
- Department of BiologyUniversity of Rochester Rochester, NY, 14627United States of America
| | - Herre S. J. van der Zant
- Department of Quantum NanoscienceDelft University of TechnologyLorentzweg 12628 CJ DelftNetherlands
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87
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Mousavi SM, Soroshnia S, Hashemi SA, Babapoor A, Ghasemi Y, Savardashtaki A, Amani AM. Graphene nano-ribbon based high potential and efficiency for DNA, cancer therapy and drug delivery applications. Drug Metab Rev 2019; 51:91-104. [DOI: 10.1080/03602532.2019.1582661] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Seyyed Mojtaba Mousavi
- Department of Medical Nanotechnology School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sadaf Soroshnia
- Department of Chemical Engineering, University of Mohaghegh Ardabili (UMA), Ardabil, Iran
| | - Seyyed Alireza Hashemi
- Department of Medical Nanotechnology School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
- Pharmaceutical Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Aziz Babapoor
- Department of Chemical Engineering, University of Mohaghegh Ardabili (UMA), Ardabil, Iran
| | - Younes Ghasemi
- Department of Medical Nanotechnology School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Amir Savardashtaki
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences and Technology, Shiraz, Iran
| | - Ali Mohammad Amani
- Department of Medical Nanotechnology School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
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88
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Mohona TM, Gupta A, Masud A, Chien SC, Lin LC, Nalam PC, Aich N. Aggregation Behavior of Inorganic 2D Nanomaterials Beyond Graphene: Insights from Molecular Modeling and Modified DLVO Theory. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4161-4172. [PMID: 30884220 DOI: 10.1021/acs.est.8b05180] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report the comparative aggregation behavior of three emerging inorganic 2D nanomaterials (NMs): MoS2, WS2, and h-BN in aquatic media. Their aqueous dispersions were subjected to aggregation under varying concentrations of monovalent (NaCl) and divalent (CaCl2) electrolytes. Moreover, Suwanee River Natural Organic Matter (SRNOM) has been used to analyze the effect of natural macromolecules on 2D NM aggregation. An increase in electrolyte concentration resulted in electrical double-layer compression of the negatively charged 2D NMs, thus displaying classical Derjaguin-Landau-Verwey-Overbeek (DLVO)-type interaction. The critical coagulation concentrations (CCC) have been estimated as 37, 60, and 19 mM NaCl and 3, 7.2, and 1.3 mM CaCl2 for MoS2, WS2, and h-BN, respectively. Theoretical predictions of CCC by modified DLVO theory have been found comparable to the experimental values when dimensionality of the materials is taken into account and a molecular modeling approach was used for calculating molecular level interaction energies between individual 2D NM nanosheets. Electrostatic repulsion has been found to govern colloidal stability of MoS2 and WS2 while the van der Waals attraction has been found to govern that of h-BN. SRNOM stabilizes the 2D NMs significantly possibly by electrosteric repulsion. The presence of SRNOM completely stabilized MoS2 and WS2 at both low and high ionic strengths. While h-BN still showed appreciable aggregation in the presence of SRNOM, the aggregation rates were decreased by 2.6- and 3.7-fold at low and high ionic strengths, respectively. Overall, h-BN nanosheets will have higher aggregation potential and thus limited mobility in the natural aquatic environment when compared to MoS2 and WS2. These results can also be used to mechanistically explain fate, transport, transformation, organismal uptake, and toxicity of inorganic 2D NMs in the natural ecosystems.
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Affiliation(s)
- Tashfia M Mohona
- Department of Civil, Structural and Environmental Engineering , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States
| | - Anusha Gupta
- Department of Civil Engineering , Indian Institute of Technology , Gandhinagar , Gujarat 382355 , India
| | - Arvid Masud
- Department of Civil, Structural and Environmental Engineering , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States
| | - Szu-Chia Chien
- Department of Materials Science and Engineering , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Li-Chiang Lin
- William G. Lowrie Department of Chemical and Biomolecular Engineering , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Prathima C Nalam
- Department of Materials Design and Innovation , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States
| | - Nirupam Aich
- Department of Civil, Structural and Environmental Engineering , University at Buffalo, The State University of New York , Buffalo , New York 14260 , United States
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89
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Song B, Chen M, Zhao L, Qiu H, Cao X. Physicochemical property and colloidal stability of micron- and nano-particle biochar derived from a variety of feedstock sources. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 661:685-695. [PMID: 30684837 DOI: 10.1016/j.scitotenv.2019.01.193] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Revised: 01/01/2019] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
The ever-increasing land application of biochar may raise the environmental issue of micronparticle (MP) and nanoparticle (NP) biochars for their high mobility or as a carrier to facilitate transport of contaminants in soil. In this study, a variety of biochars were produced from pyrolysis of nine biomass sources and then subjected to the extraction of MP and NP biochars. The diverse physicochemical properties and electrokinetic stability of MP and NP biochars were further investigated. MP and NP biochars accounted for 1.43-20.5% and 0.99-15.3% of bulk biochar and had colloidal particle diameters mainly smaller than 1 μm and 100 nm, respectively. The MP and NP biochars contained more O-containing functional groups and mineral components but less aromatic clusters than bulk biochar. The yield of MP/NP biochars derived from plant sources such as woods, herbs, and agricultural waste was positively linear to the ash content of their bulk biochars but this relationship wasn't applied to the municipal sourced biochar such as manure and sewage sludge. More condensed aromatic rings and functional groups were found in MP/NP biochar from plant biomass than municipal sourced biochar. However, the latter was rich with minerals like carbonates, phosphates, and silicates. Higher functional groups in the plant sourced MP/NP wheat straw biochar accounted for the extremely high stability to resist the whole range of ionic strength studied, while the municipal sourced MP/NP dairy manure biochar with less functional groups and more minerals were readily destabilized, with the Critical Coagulation Concentration (CCC) values of 75 mM and 100 mM, respectively. Overall, this study revealed the size-dependent characteristics of composition and structure as well as high colloidal stability of MPs and NPs which are helpful for prediction of their environmental fate and risk.
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Affiliation(s)
- Bingqing Song
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ming Chen
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ling Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hao Qiu
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China
| | - Xinde Cao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
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90
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Thermal Reduction of Graphene Oxide Mitigates Its In Vivo Genotoxicity Toward Xenopus laevis Tadpoles. NANOMATERIALS 2019; 9:nano9040584. [PMID: 30970633 PMCID: PMC6523888 DOI: 10.3390/nano9040584] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 03/28/2019] [Accepted: 04/08/2019] [Indexed: 12/12/2022]
Abstract
The worldwide increase of graphene family materials raises the question of the potential consequences resulting from their release in the environment and future consequences on ecosystem health, especially in the aquatic environment in which they are likely to accumulate. Thus, there is a need to evaluate the biological and ecological risk but also to find innovative solutions leading to the production of safer materials. This work focuses on the evaluation of functional group-safety relationships regarding to graphene oxide (GO) in vivo genotoxic potential toward X. laevis tadpoles. For this purpose, thermal treatments in H2 atmosphere were applied to produce reduced graphene oxide (rGOs) with different surface group compositions. Analysis performed indicated that GO induced disturbances in erythrocyte cell cycle leading to accumulation of cells in G0/G1 phase. Significant genotoxicity due to oxidative stress was observed in larvae exposed to low GO concentration (0.1 mg·L−1). Reduction of GO at 200 °C and 1000 °C produced a material that was no longer genotoxic at low concentrations. X-ray photoelectron spectroscopy (XPS) analysis indicated that epoxide groups may constitute a good candidate to explain the genotoxic potential of the most oxidized form of the material. Thermal reduction of GO may constitute an appropriate “safer-by-design” strategy for the development of a safer material for environment.
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91
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Xia T, Ma P, Qi Y, Zhu L, Qi Z, Chen W. Transport and retention of reduced graphene oxide materials in saturated porous media: Synergistic effects of enhanced attachment and particle aggregation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 247:383-391. [PMID: 30690234 DOI: 10.1016/j.envpol.2019.01.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/07/2018] [Accepted: 01/14/2019] [Indexed: 06/09/2023]
Abstract
The increasing production and use of graphene-based nanomaterials (e.g., graphene oxide (GO) and reduced graphene oxide (RGO)) will lead to their environmental release. To date, transport of RGOs in saturated porous media is poorly understood. Here, we examined the transport behaviors of three RGO materials obtained by reducing a GO product with commonly used reducing agents - N2H4, NaBH4 and L-ascorbic acid (referred to as N2H4-RGO, NaBH4-RGO and VC-RGO, respectively). When the dominant background cation was Na+, K+ or Mg2+, the mobility of the RGOs and GO in saturated quartz sand correlated well with their surface C/O ratio. Interestingly, the lower mobility of the more reduced materials (the ones with higher C/O values) was not only the results of their less negative surface charges and larger particle sizes, but also the outcome of their greater hydrophobicity, in line with the calculated extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) profiles. Counterintuitively, when the background cation was Ca2+, the least reduced material among the three RGOs, VC-RGO, exhibited the lowest mobility. Analysis of electrophoretic and aggregation properties, as well as pH-effect experiments, indicated that the surprisingly low mobility of VC-RGO was attributable to the strong cation-bridging effect (primarily Ca2+-bridging between RGO and quartz sand) associated with this material, as VC-RGO contained the highest amount of surface carboxyl group (a strong metal-binding moiety). Notably, enhanced attachment (due to increased hydrophobic effect and cation-bridging) and particle aggregation appeared to work synergistically to increase RGO retention, as the attachment of large RGO aggregates significantly enhanced particle straining by narrowing the flow path. These observations reveal a largely overlooked link between the mobility of graphene-based materials and their key physicochemical properties.
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Affiliation(s)
- Tianjiao Xia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Pengkun Ma
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Yu Qi
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Lingyan Zhu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Zhichong Qi
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China
| | - Wei Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin, 300350, China.
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92
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Wang F, Jia Z, Su W, Shang Y, Wang ZL. Adsorption of phenanthrene and 1-naphthol to graphene oxide and L-ascorbic-acid-reduced graphene oxide: effects of pH and surfactants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:11062-11073. [PMID: 30788701 DOI: 10.1007/s11356-019-04549-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Accepted: 02/13/2019] [Indexed: 06/09/2023]
Abstract
In this study, reduced graphene oxide (RGO) was synthesized by L-ascorbic acid reduction, which was a relatively mild and environmental friendly reduction method, and the adsorption of organic contaminants was compared to graphene oxide (GO) to probe the potential adsorption mechanisms. The morphology properties of GO and RGO were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared transmission (FTIR), Raman spectrometer, transmission electron microscope (TEM), and scanning electron microscopy (SEM). The adsorption affinities of GO and RGO for phenanthrene and 1-naphthol were studied in batch experiments. The effects of pH and surfactants were also assessed. The results demonstrated that RGO reduced by L-ascorbic acid show significantly greater adsorption affinity for both phenanthrene and 1-naphthol than GO, and even greater than most of RGOs that reduced by the strong reductive reagents. This was mainly attributed to the hydrophobic interaction, π-π interaction, and H-bonding between graphene sheets and organic contaminants. Both GO and RGO showed stronger adsorption to phenanthrene than to 1-naphthol. The adsorption of 1-naphthol increased with decreasing pH and reached a maximum around pH = 7.34. The surfactants, sodium dodecyl benzene sulfaonate (SDBS) and cetyltrimethyl ammonium bromide (CTAB), had negligible influence on adsorption to GO. Note that CTAB significantly inhibited the adsorption of phenanthrene/1-naphthol on RGO, which could be attributed to the pore blockage effect. In addition, RGO could be regenerated and reused with high recyclability over five cycles. The present study suggests that RGO obtained via L-ascorbic acid reduction can be deemed as a promising material for organic contaminated wastewater treatment.
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Affiliation(s)
- Fang Wang
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China
| | - Zhixuan Jia
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China
| | - Wenting Su
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China
| | - Yuntao Shang
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China
| | - Zhong-Liang Wang
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin, 300387, China.
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93
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Yang W, Shang J, Sharma P, Li B, Liu K, Flury M. Colloidal stability and aggregation kinetics of biochar colloids: Effects of pyrolysis temperature, cation type, and humic acid concentrations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 658:1306-1315. [PMID: 30677992 DOI: 10.1016/j.scitotenv.2018.12.269] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/06/2018] [Accepted: 12/18/2018] [Indexed: 06/09/2023]
Abstract
An understanding of biochar colloid aggregation and stability in aqueous environments is critical for assessing biochar fate and mobility in the soil. The aggregation kinetics of wheat straw-derived biochar colloids pyrolyzed at two temperatures 300 and 600 °C (WB300 and WB600 colloids, respectively) were investigated in monovalent and divalent electrolyte solutions in absence/presence of humic acid (HA). Results show that the critical coagulation concentrations (CCCs) of WB300 colloids in NaCl and CaCl2 solutions were 274 and 61.4 mM, which were higher than those (183 mM for NaCl and 38.1 mM for CaCl2) of WB600 colloids. WB300 had more oxygen-containing functional groups than WB600, which induced more negative surface charge on WB300. HA of 5 mg L-1 greatly increased the CCCs of WB300 and WB600 colloids to 1288 and 806 mM in NaCl solutions, but decreased the CCCs to 54.6 and 37.0 mM in CaCl2 solutions because of strong bridging between HA and Ca2+. In CaCl2 solutions with high salt concentrations (near to the CCCs), different HA concentrations caused distinct effects on the aggregation of biochar colloids. The aggregation of biochar colloids was accelerated by HA with the concentration higher than 5 mg L-1 through cation-bridging while the aggregation was inhibited in the presence of <2.5 mg L-1 HA. Our findings show that pyrolysis temperature used for biochar production had a large effect on the aggregation of biochar colloids in the aqueous environment and that cation type and dissolved natural organic matter are controlling variables.
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Affiliation(s)
- Wen Yang
- College of Resources and Environmental Sciences, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing 100193, China
| | - Jianying Shang
- College of Resources and Environmental Sciences, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing 100193, China.
| | - Prabhakar Sharma
- School of Ecology and Environment Studies, Nalanda University, Rajgir, Nalanda, Bihar, India
| | - Baoguo Li
- College of Resources and Environmental Sciences, China Agricultural University, Key Laboratory of Plant-Soil Interactions, Ministry of Education, Key Laboratory of Arable Land Conservation (North China), Ministry of Agriculture, Beijing 100193, China
| | - Kesi Liu
- Department of Grassland Science, China Agricultural University, Beijing 100193, China
| | - Markus Flury
- Department of Crop and Soil Sciences, Washington State University, Puyallup, WA 98374, United States
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94
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Shen M, Hai X, Shang Y, Zheng C, Li P, Li Y, Jin W, Li D, Li Y, Zhao J, Lei H, Xiao H, Li Y, Yan G, Cao Z, Bu Q. Insights into aggregation and transport of graphene oxide in aqueous and saturated porous media: Complex effects of cations with different molecular weight fractionated natural organic matter. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 656:843-851. [PMID: 30530152 DOI: 10.1016/j.scitotenv.2018.11.387] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 11/21/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Abstract
The stability of nanomaterials in aquatic environment is a critical factor that governs their fate and ecotoxicity. Meanwhile, the interaction between nanomaterials and ubiquitous natural organic matter (NOM) is a vital process that influences the transport and biological effects of nanomaterials in the environment. However, impacts of NOM on the aggregation and transport of two-dimensional nanomaterials, especially for the increasingly used graphene oxide (GO), are not well understood. Particularly, there is lack of exploration on potential impacts of the heterogeneous properties of NOM on GO behaviour, especially that induced by the wide molecular weight (MW) span of NOM. In this study, effects of several kinds of well-characterized MW fractionated Suwannee River NOM (Mf-SRNOMs) on the aggregation and transport of GO in aqueous media and saturated porous media were investigated. Our results suggest that the stability and migration capacity of GO under most investigated electrolyte conditions are promoted by all Mf-SRNOMs, and efficiencies of different Mf-SRNOMs are generally positively correlated with their MW. Primarily, mechanisms including MW-dependent steric hindrance and sorption of Mf-SRNOMs onto GO are critical in stabilizing GO, and thus facilitating its transport. However, the stronger sorption of higher Mf-SRNOMs onto the GO basal plane through π-π interaction further facilitated the cation bridging between both ends of Mf-SRNOM and GO, and resulted in heteroaggregation of NOM-GO. Moreover, the weight analysis indicated that despite the fact that high Mf-SRNOMs only occupied a small percentage of pristine-SRNOM, they showed a stronger contribution towards pristine-SRNOM's capacity in stabilizing GO, when compared with that of lower MW counterpart. These findings pointed out that complex effects of the heterogeneities of NOM and cations should be highly relevant when the aggregation and transport behaviour of two-dimensional nanomaterials is investigated, and NOM fractions that are highly aromatic and of a higher MW should receive greater attention.
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Affiliation(s)
- Mohai Shen
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China.
| | - Xiao Hai
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Yaxin Shang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Chuanrong Zheng
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Peiwen Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Yao Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Wanwan Jin
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Danlin Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Yajuan Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Jingyi Zhao
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Hengtao Lei
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Hui Xiao
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Yunbei Li
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Guangxuan Yan
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Zhiguo Cao
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Henan 453007, China
| | - Qingwei Bu
- School of Chemical & Environmental Engineering, China University of Mining & Technology-, Beijing, Beijing 100083, China
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95
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Yin T, Yang Z, Lin M, Zhang J, Dong Z. Aggregation Kinetics and Colloidal Stability of Amphiphilic Janus Nanosheets in Aqueous Solution. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b06413] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Taiheng Yin
- Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing, 102249, People’s Republic of China
| | - Zihao Yang
- Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing, 102249, People’s Republic of China
| | - Meiqin Lin
- Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing, 102249, People’s Republic of China
| | - Juan Zhang
- Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing, 102249, People’s Republic of China
| | - Zhaoxia Dong
- Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing, 102249, People’s Republic of China
- China University of Geosciences (Beijing), Beijing, 100083, People’s Republic of China
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96
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Palmieri V, Perini G, De Spirito M, Papi M. Graphene oxide touches blood: in vivo interactions of bio-coronated 2D materials. NANOSCALE HORIZONS 2019; 4:273-290. [PMID: 32254085 DOI: 10.1039/c8nh00318a] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Graphene oxide is the hot topic in biomedical and pharmaceutical research of the current decade. However, its complex interactions with human blood components complicate the transition from the promising in vitro results to clinical settings. Even though graphene oxide is made with the same atoms as our organs, tissues and cells, its bi-dimensional nature causes unique interactions with blood proteins and biological membranes and can lead to severe effects like thrombogenicity and immune cell activation. In this review, we will describe the journey of graphene oxide after injection into the bloodstream, from the initial interactions with plasma proteins to the formation of the "biomolecular corona", and biodistribution. We will consider the link between the chemical properties of graphene oxide (and its functionalized/reduced derivatives), protein binding and in vivo response. We will also summarize data on biodistribution and toxicity in view of the current knowledge of the influence of the biomolecular corona on these processes. Our aim is to shed light on the unsolved problems regarding the graphene oxide corona to build the groundwork for the future development of drug delivery technology.
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Affiliation(s)
- V Palmieri
- Fondazione Policlinico A. Gemelli IRCSS-Università Cattolica Sacro Cuore, Largo Francesco Vito 1, 00168, Roma, Italy.
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97
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Zhu L, Li Z, Tian R, Li H. Specific ion effects of divalent cations on the aggregation of positively charged goethite nanoparticles in aqueous suspension. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2018.12.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Bei HP, Yang Y, Zhang Q, Tian Y, Luo X, Yang M, Zhao X. Graphene-Based Nanocomposites for Neural Tissue Engineering. Molecules 2019; 24:E658. [PMID: 30781759 PMCID: PMC6413135 DOI: 10.3390/molecules24040658] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/31/2019] [Accepted: 02/11/2019] [Indexed: 11/25/2022] Open
Abstract
Graphene has made significant contributions to neural tissue engineering due to its electrical conductivity, biocompatibility, mechanical strength, and high surface area. However, it demonstrates a lack of biological and chemical cues. Also, it may cause potential damage to the host body, limiting its achievement of efficient construction of neural tissues. Recently, there has been an increasing number of studies showing that combining graphene with other materials to form nano-composites can provide exceptional platforms for both stimulating neural stem cell adhesion, proliferation, differentiation and neural regeneration. This suggests that graphene nanocomposites are greatly beneficial in neural regenerative medicine. In this mini review, we will discuss the application of graphene nanocomposites in neural tissue engineering and their limitations, through their effect on neural stem cell differentiation and constructs for neural regeneration.
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Affiliation(s)
- Ho Pan Bei
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Yuhe Yang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
- Department of Mechanical Engineering, National University of Singapore (NUS), Singapore 117575, Singapore.
| | - Qiang Zhang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Yu Tian
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Xiaoming Luo
- Department of Preventive Medicine, School of Public Health, Chengdu Medical College, Chengdu 610500, China.
| | - Mo Yang
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
| | - Xin Zhao
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China.
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McCoy TM, Turpin G, Teo BM, Tabor RF. Graphene oxide: a surfactant or particle? Curr Opin Colloid Interface Sci 2019. [DOI: 10.1016/j.cocis.2019.01.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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100
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Siong VLE, Lee KM, Juan JC, Lai CW, Tai XH, Khe CS. Removal of methylene blue dye by solvothermally reduced graphene oxide: a metal-free adsorption and photodegradation method. RSC Adv 2019; 9:37686-37695. [PMID: 35542257 PMCID: PMC9075724 DOI: 10.1039/c9ra05793e] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 11/12/2019] [Indexed: 11/21/2022] Open
Abstract
In this work, reduced graphene oxide (rGO) was fabricated at different reduction temperatures via an environmentally friendly solvothermal approach. The rGO formed at 160 °C clearly showed the partial restoration of the sp2 hybridization brought about by the elimination of oxygenated functionalities from the surface. Owing to the augmented surface area and the band gap reduction, rGO-160 exhibited the best adsorption (29.26%) and photocatalytic activity (32.68%) towards the removal of MB dye. The effects of catalyst loading, initial concentration of dye, light intensity, and initial pH of solution were evaluated. It was demonstrated that rGO-160 could achieve a higher adsorptive removal (87.39%) and photocatalytic degradation (98.57%) of MB dye when 60 mg of catalyst, 50 ppm of dye at pH 11, and 60 W m−2 of UV-C light source were used. The MB photodegradation activity of rGO-160 displayed no obvious decrease after five successive cycles. This study provides a potential metal-free adsorbent-cum-photocatalyst for the decontamination of dyes from wastewater. A metal-free MB dye removal process was carried out by solvothermally synthesized rGO. After optimization, near-complete dye removal was achieved via an adsorption and UV photodegradation route.![]()
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Affiliation(s)
- Valerie Ling Er Siong
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Kian Mun Lee
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Joon Ching Juan
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Chin Wei Lai
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Xin Hong Tai
- Nanotechnology & Catalysis Research Centre
- Institute for Advanced Studies
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Cheng Seong Khe
- Department of Fundamental and Applied Sciences
- Universiti Teknologi PETRONAS
- Malaysia
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