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Insights on the Dynamics and Toxicity of Nanoparticles in Environmental Matrices. Bioinorg Chem Appl 2022; 2022:4348149. [PMID: 35959228 PMCID: PMC9357770 DOI: 10.1155/2022/4348149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/21/2022] [Accepted: 06/29/2022] [Indexed: 12/29/2022] Open
Abstract
The manufacturing rate of nanoparticles (10–100 nm) is steadily increasing due to their extensive applications in the fabrication of nanoproducts related to pharmaceuticals, cosmetics, medical devices, paints and pigments, energy storage etc. An increase in research related to nanotechnology is also a cause for the production and disposal of nanomaterials at the lab scale. As a result, contamination of environmental matrices with nanoparticles becomes inevitable, and the understanding of the risk of nanoecotoxicology is getting larger attention. In this context, focusing on the environmental hazards is essential. Hence, this manuscript aims to review the toxic effects of nanoparticles on soil, water, aquatic, and terrestrial organisms. The effects of toxicity on vertebrates, invertebrates, and plants and the source of exposure, environmental and biological dynamics, and the adverse effects of some nanoparticles are discussed.
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Xia T, Lin Y, Li S, Yan N, Xie Y, He M, Guo X, Zhu L. Co-transport of negatively charged nanoparticles in saturated porous media: Impacts of hydrophobicity and surface O-functional groups. JOURNAL OF HAZARDOUS MATERIALS 2021; 409:124477. [PMID: 33172676 DOI: 10.1016/j.jhazmat.2020.124477] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/01/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
Graphene oxide (GO) and polystyrene nanoplastic (PSNP) are typical carbonaceous nanomaterials which likely co-exist in soil and sediment. Here, we describe the transport of GO, irradiation reduced GO (RGO) and PSNP in saturated quartz sand both in single and binary systems. In the single transport system, the materials exhibited mobility in the order of GO > RGO > PSNP, due to increased hydrophobicity and decreased negative surface charges. Nevertheless, the co-transport of (R)GO and PSNP in the binary transport system was much more intricate. In Na+ saturated porous media, PSNP preferred to interact with (R)GO relative to the highly negatively charged quartz sand, thus (R)GO carried PSNP to break through the sand column. However, in Ca2+ saturated porous media, the transport of both (R)GO and PSNP was depressed, attributed to the particle-collector and particle-particle bridging effects between Ca2+ and the metal-complexing moieties of the nanoparticles and sand grains. Moreover, GO influenced the co-transport of PSNP to a larger extent than RGO, especially at relatively high ionic strength, because of the more abundant surface O-functional groups on GO providing more complexion sites with Ca2+. These results demonstrated that the transport of negatively charged nanomaterials was greatly related to the hydrophobicity and surface O-functional groups.
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Affiliation(s)
- Tianjiao Xia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Yixuan Lin
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Shunli Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Ni Yan
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Yao Xie
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Mengru He
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China
| | - Lingyan Zhu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi 712100, China.
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Wang M, Zhang H, Chen W, Lu T, Yang H, Wang X, Lu M, Qi Z, Li D. Graphene oxide nanoparticles and hematite colloids behave oppositely in their co-transport in saturated porous media. CHEMOSPHERE 2021; 265:129081. [PMID: 33288283 DOI: 10.1016/j.chemosphere.2020.129081] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/09/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Since iron oxide minerals are ubiquitous in natural environments, the release of graphene oxide (GO) into environmental ecosystems can potentially interact with iron oxide particles and thus alter their surface properties, resulting in the change of their transport behaviors in subsurface systems. Column experiments were performed in this study to investigate the co-transport of GO nanoparticles and hematite colloids (a model representative of iron oxides) in saturated sand. The results demonstrated that the presence of hematite inhibited GO transport in quartz sand columns due to the formation of less negatively charged GO-hematite heteroaggregates and additional deposition sites provided by the adsorbed hematite on sand surfaces. Contrarily, GO co-present in suspensions significantly enhanced the transport of hematite colloids through different mechanisms such as the increase of electrostatic repulsion, decreased physical straining, GO-facilitated transport of hematite (i.e., highly mobile GO nanoparticles served as a mobile carrier for hematite). We also found that the co-transport behaviors of GO and hematite depended on solution chemistry (e.g., pH, ionic strength, and divalent cation (i.e., Ca2+)), which affected the electrostatic interaction as well as heteroaggregation behaviors between GO nanoparticles and hematite colloids. The findings provide an insight into the potential fate of carbon nanomaterials affected by mineral colloids existing in natural waters and soils.
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Affiliation(s)
- Mengjie Wang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China; Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300350, China
| | - Haojing Zhang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Weifeng Chen
- Ministry of Education Key Laboratory of Humid Subtropical Eco-geographical Process, Fujian Provincial Key Laboratory for Plant Eco-physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian, 350007, China
| | - Taotao Lu
- Department of Hydrology, University of Bayreuth, Bayreuth, D-95440, Germany
| | - Huihui Yang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Xinhai Wang
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Minghua Lu
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
| | - Zhichong Qi
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China; Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin, 300350, China.
| | - Deliang Li
- Henan Joint International Research Laboratory of Environmental Pollution Control Materials, Henan Engineering Research Center for Control and Remediation of Soil Heavy Pollution, Engineering Research Center for Industrial Recirculation Water Treatment of Henan Province, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, 475004, China
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Sabaraya IV, Shin H, Li X, Hoq R, Incorvia JAC, Kirisits MJ, Saleh NB. Role of Electrostatics in the Heterogeneous Interaction of Two-Dimensional Engineered MoS 2 Nanosheets and Natural Clay Colloids: Influence of pH and Natural Organic Matter. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:919-929. [PMID: 33170670 DOI: 10.1021/acs.est.0c03580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Few-layered molybdenum disulfide (MoS2) nanosheets are poised to be at the core of low-voltage electronic device development. Upon environmental release, these two-dimensional (2D) structures can interact with abundant natural geocolloids. This study probes the role of dimensionality in modulating the aggregation behavior of 2D MoS2 nanosheets with plate-like geocolloids (i.e., homoionized kaolinite and montmorillonite clays). MoS2 nanosheets were exfoliated using an ethanol/water mixture, and aggregation kinetics were investigated with time-resolved dynamic light scattering at low monovalent salt concentrations and at three pH levels, in the presence and absence of Suwannee River humic acid (SRHA). Results indicate that pH and particle ratios are key to modulating the stability of MoS2/clay systems. At pH 4, aggregation of MoS2 increased with increasing MoS2/clay ratios and approached maximum values of 0.09 and 0.06 nm/s in the binary systems with montmorillonite and kaolinite, respectively. Electrostatic attraction facilitates heteroaggregation at pH values of 4 and 6; differences in the clay structures (i.e., face-face or face-edge aggregates) might explain the resulting MoS2/clay aggregate configurations, which were probed via the evolution of particle size distribution. The presence of only 0.1 mg/L SRHA drastically suppresses the heteroaggregation propensity of MoS2 nanosheets with geocolloids (to less than 0.01 nm/s at all pH values tested). The high stability of these heterogeneous systems under environmentally relevant conditions can increase the likelihood for cellular uptake and long-distance transport of MoS2.
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Affiliation(s)
- Indu Venu Sabaraya
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Hyunjung Shin
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Xintong Li
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rushmia Hoq
- Austin Peace Academy, Austin, Texas 78723, United States
| | - Jean Anne C Incorvia
- Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Mary Jo Kirisits
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Navid B Saleh
- Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
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Lê QT, Ly NH, Kim MK, Lim SH, Son SJ, Zoh KD, Joo SW. Nanostructured Raman substrates for the sensitive detection of submicrometer-sized plastic pollutants in water. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123499. [PMID: 32739725 DOI: 10.1016/j.jhazmat.2020.123499] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 05/24/2023]
Abstract
We prepared novel Raman substrates for the sensitive detection of submicron-sized plastic spheres in water. Anisotropic nanostar dimer-embedded nanopore substrates were prepared for the efficient identification of submicron-sized plastic spheres by providing internal hot spots of electromagnetic field enhancements at the tips of nanoparticles. Silver-coated gold nanostars (AuNSs@Ag) were inserted into anodized aluminum oxide (AAO) nanopores for enhanced microplastic (MP) detection. We found that surface-enhanced Raman scattering (SERS) substrates of AuNSs@Ag@AAO yielded stronger signals at the same weight percentages for polystyrene MP particles with diameters as small as 0.4 μm, whereas such behaviors could not be observed for larger MPs (diameters of 0.8 μm, 2.3 μm, and 4.8 μm). The detection limit of the submicrometer-sized 0.4 μm in our Raman measurements were estimated to be 0.005% (∼0.05 mg/g =50 ppm) along with a fast detection time of only a few min without any sample pretreatments. Our nano-sized dimensional matching substrates may provide a useful tool for the application of SERS substrates for submicrometer MP pollutants in water.
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Affiliation(s)
- Quang Trung Lê
- Department of Information Communication Convergence Technology, Soongsil University, Seoul, 06978, Republic of Korea
| | - Nguyễn Hoàng Ly
- Department of Chemistry, Soongsil University, Seoul, 06978, Republic of Korea
| | - Moon-Kyung Kim
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, Republic of Korea
| | - Soon Hyuk Lim
- Department of Chemistry, Gachon University, Seongnam, 13120, Republic of Korea
| | - Sang Jun Son
- Department of Chemistry, Gachon University, Seongnam, 13120, Republic of Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang-Woo Joo
- Department of Information Communication Convergence Technology, Soongsil University, Seoul, 06978, Republic of Korea; Department of Chemistry, Soongsil University, Seoul, 06978, Republic of Korea.
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Kumar A, Raychoudhury T. Long-term fate of ZnO-Fe xO y mix-nanoparticles through the saturated porous media under constant head condition. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 721:137669. [PMID: 32172105 DOI: 10.1016/j.scitotenv.2020.137669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/15/2020] [Accepted: 03/01/2020] [Indexed: 06/10/2023]
Abstract
The objective of this study is to evaluate the long-term fate of the nZnO-nFexOy mix nanoparticles through the natural sediment in the presence of humic acid (HA) under varying pH and natural groundwater conditions. To achieve the objectives, a series of experiments were carried out where 50 mg/l of nZnO-nFexOy mix suspensions were injected for 5 pore volumes (PVs) in that porous media in the presence of 10 mg/l HA under varying pH (6 and 8) followed by flushing with deionized and natural groundwater for another 95 PVs under constant head condition. The outcome of the study suggests that during the injection of the nZnO-nFexOy mix suspension, more nZnO particles retain when the suspension is prepared at pH 6 (>90%). With an increase in pH of nZnO-nFexOy mix suspension and background water, the long-term release of retained nZnO particles has increased significantly (from 29.97% at pH 6 to 95.89% at pH 8). The surface charge and the electrostatic repulsion are likely to govern the detachment and release of nZnO particles. Certain fraction (3.58-7.97%) of the Zn was also found to be dissolved and eluted at the outlet when the pH of background water is maintained at 6. In the case of nFexOy, extensive retention of particles is observed during injection at both pHs (6 and 8). The release of the retained particles is limited (6.34%) specifically at lower pH (pH 6). There is an increase in the release of nFexOy particles (24.76%) with an increase in the pH (pH 8) of both the suspension and background solution. When groundwater is used as the background water, a slight reduction in the release of Zn (22.04%) and Fe (2.06%) is observed at a pH of 6. However, at higher pH (pH 8), significantly less amount of retained particles (2.24% of Zn and 4.96% of Fe) are released. This is mainly due to the presence of co-ions in the groundwater which resulted in less negative charge of ENPs thus having less detachment and release of Zn and Fe particles. Overall, it could be concluded that there is a risk of release of Zn and Fe (especially at high pH) in the long run in the presence of organic matter when exposed in the porous media. The extent of release of Zn and Fe would be more at higher pH and might be less in the presence of other ions and under groundwater conditions.
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Affiliation(s)
- Atul Kumar
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, 801103, India
| | - Trishikhi Raychoudhury
- Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, 801103, India.
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Abbas Q, Yousaf B, Ali MU, Munir MAM, El-Naggar A, Rinklebe J, Naushad M. Transformation pathways and fate of engineered nanoparticles (ENPs) in distinct interactive environmental compartments: A review. ENVIRONMENT INTERNATIONAL 2020; 138:105646. [PMID: 32179325 DOI: 10.1016/j.envint.2020.105646] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 03/08/2020] [Accepted: 03/08/2020] [Indexed: 05/24/2023]
Abstract
The ever increasing production and use of nano-enabled commercial products release the massive amount of engineered nanoparticles (ENPs) in the environment. An increasing number of recent studies have shown the toxic effects of ENPs on different organisms, raising concerns over the nano-pollutants behavior and fate in the various environmental compartments. After the release of ENPs in the environment, ENPs interact with various components of the environment and undergoes dynamic transformation processes. This review focus on ENPs transformations in the various environmental compartments. The transformation processes of ENPs are interrelated to multiple environmental aspects. Physical, chemical and biological processes such as the homo- or hetero-agglomeration, dissolution/sedimentation, adsorption, oxidation, reduction, sulfidation, photochemically and biologically mediated reactions mainly occur in the environment consequently changes the mobility and bioavailability of ENPs. Physico-chemical characteristics of ENPs (particle size, surface area, zeta potential/surface charge, colloidal stability, and core-shell composition) and environmental conditions (pH, ionic strength, organic and inorganic colloids, temperature, etc.) are the most important parameters which regulated the ENPs environmental transformations. Meanwhile, in the environment, organisms encountered multiple transformed ENPs rather than the pristine nanomaterials due to their interactions with various environmental materials and other pollutants. Thus it is the utmost importance to study the behavior of transformed ENPs to understand their environmental fate, bioavailability, and mode of toxicity.
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Affiliation(s)
- Qumber Abbas
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Balal Yousaf
- Department of Environmental Engineering, Middle East Technical University, Ankara 06800, Turkey; CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
| | - Muhammad Ubaid Ali
- Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China; State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Mehr Ahmed Mujtaba Munir
- CAS-Key Laboratory of Crust-Mantle Materials and the Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China
| | - Ali El-Naggar
- Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water- and Waste-Management, Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; Department of Environment, Energy and Geoinformatics, Sejong University, 98 Gunja-Dong, Seoul, Republic of Korea
| | - Mu Naushad
- Department of Chemistry, College of Science, Bld#5, King Saud University, Riyadh, Saudi Arabia
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Sharma KV, Straka R, Tavares FW. Lattice Boltzmann Methods for Industrial Applications. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b02008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keerti Vardhan Sharma
- Escola de Química, Federal University of Rio de Janeiro, CEP: 21949-900, Rio de Janeiro, Brazil
- PEQ/COPPE, Federal University of Rio de Janeiro, CEP: 24210-240, Rio de Janeiro, Brazil
| | - Robert Straka
- Department of Heat Engineering and Environment Protection, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059, Krakow, Poland
| | - Frederico Wanderley Tavares
- Escola de Química, Federal University of Rio de Janeiro, CEP: 21949-900, Rio de Janeiro, Brazil
- PEQ/COPPE, Federal University of Rio de Janeiro, CEP: 24210-240, Rio de Janeiro, Brazil
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Xia T, Lin Y, Guo X, Li S, Cui J, Ping H, Zhang J, Zhong R, Du L, Han C, Zhu L. Co-transport of graphene oxide and titanium dioxide nanoparticles in saturated quartz sand: Influences of solution pH and metal ions. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 251:723-730. [PMID: 31112926 DOI: 10.1016/j.envpol.2019.05.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/24/2019] [Accepted: 05/08/2019] [Indexed: 06/09/2023]
Abstract
Increasing production and application of nanomaterials lead to their environmental release possible. The nanomaterials with different properties may transport together in porous media, and consequently affect their environmental fates. In this study, column experiments were conducted to investigate the co-transport of two typical nanomaterials, graphene oxide (GO) and nano-titanium dioxide (nTiO2), in saturated quartz sand in NaCl and CaCl2 electrolyte solutions under both favorable and unfavorable conditions. The breakthrough curves as well as the retained profiles of single and binary nanoparticles were examined. The results indicated that nTiO2 significantly enhanced the GO retention under all examined conditions, especially at lower pH, higher ionic strength and the presence of divalent cation Ca2+. This might be attributed to the formation of less negatively charged and larger-sized GO-nTiO2 agglomerates as well as the increased retention sites on sand surface by preferentially deposited nTiO2. However, GO merely slightly enhanced the transport of nTiO2 in NaCl solutions, whereas had negligible effect on nTiO2 transport and retention in CaCl2 solutions. The highly hydrophilic and mobile GO served as a carrier and facilitated the transport of nTiO2 in NaCl solutions. In CaCl2 solutions, the strong attachment affinity between positively charged nTiO2 and negatively charged quartz sand (at pH 4.5), and dramatical accumulation of large nTiO2 agglomerates near the column inlets (at pH 6.5) led to significant deposition of nTiO2 on quartz sand. The co-presence of GO failed to counteract the retention of nTiO2 particles on sand.
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Affiliation(s)
- Tianjiao Xia
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Yixuan Lin
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Xuetao Guo
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Shunli Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Jingshan Cui
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Huaixiang Ping
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Jin Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Rongwei Zhong
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Lisha Du
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Chunxiao Han
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China
| | - Lingyan Zhu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China; Key Laboratory of Plant Nutrition and the Agri-Environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi, 712100, PR China.
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Yuan Y, Guo P, Peng X. Effect of fullerol nanoparticles on the transport and release of copper ions in saturated porous media. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:15255-15261. [PMID: 30929172 DOI: 10.1007/s11356-019-04944-2] [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: 09/13/2018] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
While the application and discharge of carbon nanomaterials (CNMs) increased rapidly, the research on the environmental safety of CNMs is also increasing. The high dispersity and mobility of modified CNMs in environmental media may have impacts on the environmental behavior of heavy metals. This work mainly studied the effect of fullerol nanoparticles (C60(OH)n) on Cu2+ transport, sorption, and release in water-saturated porous media. The results showed that due to the strong adsorption capacity of C60(OH)n for Cu2+, the transport of Cu2+ could be facilitated. However, with the pre-existence of C60(OH)n in porous media, the transport of Cu2+ was also slightly enhanced. In addition, when loaded into the pre-contaminated porous medium, the C60(OH)n also enhanced the release of retained Cu2+, which implies a high environmental risk of C60(OH)n.
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Affiliation(s)
- Yue Yuan
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
- College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Panpan Guo
- College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Xianjia Peng
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
- College of Resource and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China.
- Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
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11
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Liu L, Liu G, Zhou J, Wang J, Jin R. Cotransport of biochar and Shewanella oneidensis MR-1 in saturated porous media: Impacts of electrostatic interaction, extracellular electron transfer and microbial taxis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 658:95-104. [PMID: 30572219 DOI: 10.1016/j.scitotenv.2018.12.031] [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: 09/30/2018] [Revised: 11/17/2018] [Accepted: 12/04/2018] [Indexed: 06/09/2023]
Abstract
Biochar widely applied to soil can influence microbial community composition and participate in extracellular electron transfer (EET). However, little is known about the cotransport behaviors of bacteria and biochar in aquifer and soil-water environments, which can affect the fate and application performance of biochar. In this study, we found that in comparison to their individual transport behaviors, the mobilities of cotransporting Shewanella oneidensis MR-1 and biochar colloid (BC) were significantly inhibited. The decreasing colloidal mobilities at higher ionic strengths signified the importance of electrostatic interaction between cell and BC in cotransport. Moreover, the less suppressed cotransport of BC and mutants defective of EET and the elevated inhibition effects on cotransport by adding exogenous electron donor suggested the importance of EET. Difference in cotransport behavior was also observed with BC having different redox states. Compared with oxidized BC, reduced BC with higher hydrophobicity led to easier aggregation with cell and higher retention in column. More importantly, MR-1 exhibited EET-dependent taxis towards biochar, which also contributed to the enhanced heteroaggregation and decreased mobilities of cell and biochar. Our results highlight that metabolic activities of microbes towards abiotic colloids cannot be neglected when assessing their transport behaviors, especially in subsurface environments abounded with redox-active inorganic particles and microbes performing extracellular respiration.
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Affiliation(s)
- Lecheng Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jing Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Ruofei Jin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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12
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Jahan S, Alias YB, Bakar AFBA, Yusoff IB. Transport and retention behavior of carbonaceous colloids in natural aqueous medium: Impact of water chemistry. CHEMOSPHERE 2019; 217:213-222. [PMID: 30415119 DOI: 10.1016/j.chemosphere.2018.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 10/21/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Carbon based materials are emerging as a sustainable alternative to their metal-oxide counterparts. However, their transport behavior under natural aqueous environment is poorly understood. This study investigated the transport and retention profiles of carbon nanoparticles (CNPs) and graphene oxide quantum dots (GOQDs) through column experiments in saturated porous media. CNPs and GOQDs (30 mg/L) were dispersed in natural river water (RW) and passed through the column at a flow rate of 1 mL/min, which mimicking the natural water flow rate. After every 10 min, the column effluents were collected and the mass recovery and retention profiles were monitored. Results indicated that the transport of both carbonaceous colloids was predominantly controlled by surface potential and ionic composition of natural water. The CNPs with its high surface potential (-40 mV) exhibited more column transport and was less susceptible to solution pH (5.6-6.8) variation as compared to GOQDs (-24 mV). The results showed that, monovalent salt (NaCl) was one of the dominating factors for the retention and transport of carbonaceous colloids compared to divalent salt (CaCl2). Furthermore, the presence of natural organic matter (NOM) increased the transport of both carbonaceous colloids and thereby decreases the tendency for column retention.
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Affiliation(s)
- Shanaz Jahan
- Department of Geology, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia.
| | - Yatimah Binti Alias
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia; University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, Kuala Lumpur, 50603, Malaysia
| | | | - Ismail Bin Yusoff
- Department of Geology, Faculty of Science, University of Malaya, Kuala Lumpur, 50603, Malaysia
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13
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Dong Z, Zhang W, Qiu Y, Yang Z, Wang J, Zhang Y. Cotransport of nanoplastics (NPs) with fullerene (C 60) in saturated sand: Effect of NPs/C 60 ratio and seawater salinity. WATER RESEARCH 2019; 148:469-478. [PMID: 30408733 DOI: 10.1016/j.watres.2018.10.071] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 09/27/2018] [Accepted: 10/25/2018] [Indexed: 06/08/2023]
Abstract
Nanoplastics (NPs) have been identified as newly emerging particulate contaminants. In marine environments, the interaction between NPs and other engineered nanoparticles remains unknown. This study investigated the cotransport of NPs with fullerene (C60) in seawater-saturated columns packed with natural sand as affected by the mass concentration ratio of NPs/C60 and the hydrochemical characteristics. In seawater with 35 practical salinity units (PSU), NPs could remarkably enhance C60 dispersion with a NPs/C60 ratio of 1. NPs behaved as a vehicle to facilitate C60 transport by decreasing colloidal ζ-potential and forming stable primary heteroaggregates. As the NPs/C60 ratio decreased to 1/3, NPs mobility was progressively restrained because of the formation of large secondary aggregates. When the ratio continuously decreased to 1/10, the stability and transport of colloids were governed by C60 rather than NPs. Under this condition, the transport trend of binary suspensions was similar to that of single C60 suspension, which was characterized by a ripening phenomenon. Seawater salinity is another key factor affecting the stability and associated transport of NPs and C60. In seawater with 3.5 PSU, NPs and C60 (1:1) in binary suspension exhibited colloidal dispersion, which was driven by a high-energy barrier. Thus, the profiles of the cotransport and retention of NPs/C60 resembled those of single NPs suspension. This work demonstrated that the cotransport of NPs/C60 strongly depended on their mass concentration ratios and seawater salinity.
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Affiliation(s)
- Zhiqiang Dong
- State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, International Joint Research Center for Sustainable Urban Water System, Shanghai, 200092, PR China
| | - Wen Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, International Joint Research Center for Sustainable Urban Water System, Shanghai, 200092, PR China
| | - Yuping Qiu
- State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China; Shanghai Institute of Pollution Control and Ecological Security, International Joint Research Center for Sustainable Urban Water System, Shanghai, 200092, PR China.
| | - Zhenglong Yang
- School of Materials Science and Engineering, Jiading Campus, Tongji University, Shanghai, 201804, China
| | - Junliang Wang
- School of the Environment, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Yidi Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China
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14
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Ma C, Huangfu X, He Q, Ma J, Huang R. Deposition of engineered nanoparticles (ENPs) on surfaces in aquatic systems: a review of interaction forces, experimental approaches, and influencing factors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:33056-33081. [PMID: 30267342 DOI: 10.1007/s11356-018-3225-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 09/13/2018] [Indexed: 06/08/2023]
Abstract
The growing development of nanotechnology has promoted the wide application of engineered nanomaterials, raising immense concern over the toxicological impacts of nanoparticles on the ecological environment during their transport processes. Nanoparticles in aquatic systems may undergo deposition onto environmental surfaces, which affects the corresponding interactions of engineered nanoparticles (ENPs) with other contaminants and their environmental fate to a certain extent. In this review, the most common ENPs, i.e., carbonaceous, metallic, and nonmetallic nanoparticles, and their potential ecotoxicological impacts on the environment are summarized. Colloidal interactions, including Derjaguin-Landau-Verwey-Overbeek (DLVO) and non-DLVO forces, involved in governing the depositional behavior of these nanoparticles in aquatic systems are outlined in this work. Moreover, laboratory approaches for examining the deposition of ENPs on collector surfaces, such as the packed-bed column and quartz crystal microbalance (QCM) method, and the limitations of their applications are outlined. In addition, the deposition kinetics of nanoparticles on different types of surfaces are critically discussed as well, with emphasis on other influencing factors, including particle-specific properties, particle aggregation, ionic strength, pH, and natural organic matter. Finally, the future outlook and challenges of estimating the environmental transport of ENPs are presented. This review will be helpful for better understanding the effects and transport fate of ENPs in aquatic systems. Graphical abstract ᅟ.
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Affiliation(s)
- Chengxue Ma
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China
| | - Xiaoliu Huangfu
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China.
| | - Qiang He
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China.
| | - Jun Ma
- State Key Laboratory of Urban Water Resource and Environment, School of Environmental Engineering, Harbin Institute of Technology, Harbin, China
| | - Ruixing Huang
- Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400044, China
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15
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Liu F, Xu B, He Y, Brookes PC, Tang C, Xu J. Differences in transport behavior of natural soil colloids of contrasting sizes from nanometer to micron and the environmental implications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 634:802-810. [PMID: 29660881 DOI: 10.1016/j.scitotenv.2018.03.381] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/27/2018] [Accepted: 03/30/2018] [Indexed: 06/08/2023]
Abstract
Transport behaviors of nanoparticles (<100nm) and clay fractions (clay particles, <2μm; coarse clay particles, 1-2μm and fine clay particles, 0.1-1μm) extracted from two natural soils (Inceptisol from Jilin and Oxisol from Hainan, China) were investigated in saturated sand columns at 1-30mM NaCl and pH5-9. Increasing NaCl concentrations decreased the mobility, while increasing pH increased the mobility of soil particles of various sizes. At pH5 and 30mM NaCl, nanoparticles and clay fractions exhibited the different transport behaviors, and ripening was observed for Inceptisol nanoparticles while blocking for Oxisol nanoparticles in breakthrough curves (BTCs). The effluent mass recoveries (MRs) of nanoparticles were much more than that of clay particles for both two soils (>1.9-fold) at all tested conditions, except for Inceptisol at pH5 and 30mM NaCl (with comparable MR). According to Derjaguin-Landau-Verwey-Overbeek (DLVO) calculations and particle-collector size ratios, both secondary energy minimum and physical straining led to the retention of clay fractions at pH5 and 30mM NaCl, whereas primary energy minimum and straining induced by simultaneous aggregation caused the retention of nanoparticles. The experimental attachment efficiency between soil particles of various sizes and sand collector for both two soils was in the order nanoparticles<fine clay particles<clay particles<coarse clay particles, indicating that soil nanoparticles had greater mobility than clay fractions. Consequently, nanoparticles are suggested to have greater risks to transport contaminants to surface and groundwater, once they are released from soils.
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Affiliation(s)
- Fei Liu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Baile Xu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Yan He
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Philip C Brookes
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Caixian Tang
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China; Department of Animal, Plant & Soil Sciences, Centre for AgriBioscience, La Trobe University (Melbourne Campus), Bundoora, VIC 3086, Australia
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
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16
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Das D, Sabaraya IV, Zhu T, Sabo-Attwood T, Saleh NB. Aggregation Behavior of Multiwalled Carbon Nanotube-Titanium Dioxide Nanohybrids: Probing the Part-Whole Question. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8233-8241. [PMID: 29944362 PMCID: PMC6269091 DOI: 10.1021/acs.est.7b05826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Multiwalled carbon nanotube-titanium dioxide (MWNT-TiO2) nanohybrids (NHs), a promising support for electrocatalysts, have a high likelihood of environmental release. Aggregation of these NHs may or may not be captured by the sum of their component behavior, thus necessitating a systematic evaluation. This study probes the "part-whole question" by systematically evaluating the role of TiO2 loading (C:Ti molar ratios of 1:0.1, 1:0.05 and 1:0.033) on the aggregation behavior of these NHs. Aggregation kinetics of these in-house synthesized (using a sol-gel method) NHs and the components is investigated with time-resolved dynamic light scattering in the presence of mono- and divalent cations and with and without Suwannee River humic acid. A deviation in the aggregation behavior from classical electrokinetic theory has been observed which indicates that the material complexity has a strong influence in the observed behavior; hence other material attributes (e.g., fractal dimension, surface roughness, charge heterogeneity, etc.) should be carefully considered when studying such materials. The sum of the aggregation behavior of the parts may not capture that of the whole (i.e., of the NHs); aggregation depends on the TiO2 loading and also on the hybridization process and the background aquatic chemistry.
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Affiliation(s)
- Dipesh Das
- Department of Civil, Architectural and Environmental
Engineering, The University of Texas at Austin, Austin, Texas 78712, United
States
| | - Indu Venu Sabaraya
- Department of Civil, Architectural and Environmental
Engineering, The University of Texas at Austin, Austin, Texas 78712, United
States
| | - Tongren Zhu
- Department of Civil, Architectural and Environmental
Engineering, The University of Texas at Austin, Austin, Texas 78712, United
States
| | - Tara Sabo-Attwood
- Department of Environment and Global Health,
University of Florida, Gainesville, Florida 32610, United States
| | - Navid B. Saleh
- Department of Civil, Architectural and Environmental
Engineering, The University of Texas at Austin, Austin, Texas 78712, United
States
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17
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Fang J, Shen B, Cheng L, Wang M, Zhang L, Lin D. Oxytetracycline increases the mobility of carbon nanotubes in porous media. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 628-629:1130-1138. [PMID: 30045536 DOI: 10.1016/j.scitotenv.2018.02.154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/11/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
UNLABELLED The effect of engineered nanoparticles on the mobility of co-existing contaminants has been increasingly studied, while the reverse effect receives little attention. This study provides results from investigating the effect of oxytetracycline (OTC) on the mobility of oxidized multi-walled carbon nanotubes (O-MWCNTs) in quartz sand (QS) columns at various solution ionic strengths (ISs) and pHs. The mobility of O-MWCNTs in QS columns was significantly enhanced by the presence of OTC under all of the tested solution conditions (IS: 0.1, 1.0, and 10mM; pH: 3.0, 5.5, and 8.5), with an increase of 8.6-50.9%. Such enhancement was nonlinear over OTC concentration, which firstly increased (0 to 2.5mgL-1 OTC) and then decreased (2.5 to 20mgL-1OTC) at pH5.5. The major contributor to the OTC-enhanced O-MWCNTs mobility was competition of the two analytes for adsorption sites on the QS surface. Batch attachment results show that the adsorption of O-MWCNTs in the presence of OTC onto QS was also nonlinear with OTC concentration (firstly decreased and then increased with increasing OTC) at pH5.5, which gave the plausible explanation for the nonlinear enhancement of O-MWCNTs transport in QS columns by the presence of OTC. In turn, both the carrier and competition actions of O-MWCNTs determined the mobility of OTC in QS columns and the carrier action was stronger when more OTC was associated with O-MWCNTs in the influent. These results imply that the mobility of O-MWCNTs in OTC polluted water and soil can be significantly stronger than that in non-polluted area. CAPSULE OTC can increase the migration of O-MWCNTs mainly through the competition for adsorption sites on collectors.
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Affiliation(s)
- Jing Fang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China
| | - Bing Shen
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, 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
| | - Minhao Wang
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, PR China; Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China
| | - Luqing Zhang
- Department of Environmental Science, Zhejiang University, Hangzhou 310058, PR China
| | - 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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18
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Insights into Metal Oxide and Zero-Valent Metal Nanocrystal Formation on Multiwalled Carbon Nanotube Surfaces during Sol-Gel Process. NANOMATERIALS 2018; 8:nano8060403. [PMID: 29874789 PMCID: PMC6026900 DOI: 10.3390/nano8060403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 05/24/2018] [Accepted: 05/29/2018] [Indexed: 12/12/2022]
Abstract
Carbon nanotubes are hybridized with metal crystals to impart multifunctionality into the nanohybrids (NHs). Simple but effective synthesis techniques are desired to form both zero-valent and oxides of different metal species on carbon nanotube surfaces. Sol-gel technique brings in significant advantages and is a viable technique for such synthesis. This study probes the efficacy of sol-gel process and aims to identify underlying mechanisms of crystal formation. Standard electron potential (SEP) is used as a guiding parameter to choose the metal species; i.e., highly negative SEP (e.g., Zn) with oxide crystal tendency, highly positive SEP (e.g., Ag) with zero-valent crystal-tendency, and intermediate range SEP (e.g., Cu) to probe the oxidation tendency in crystal formation are chosen. Transmission electron microscopy and X-ray diffraction are used to evaluate the synthesized NHs. Results indicate that SEP can be a reliable guide for the resulting crystalline phase of a certain metal species, particularly when the magnitude of this parameter is relatively high. However, for intermediate range SEP-metals, mix phase crystals can be expected. For example, Cu will form Cu2O and zero-valent Cu crystals, unless the synthesis is performed in a reducing environment.
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19
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Yuan Y, Peng X. Fullerol-facilitated transport of copper ions in water-saturated porous media: Influencing factors and mechanism. JOURNAL OF HAZARDOUS MATERIALS 2017; 340:96-103. [PMID: 28711837 DOI: 10.1016/j.jhazmat.2017.07.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/17/2017] [Accepted: 07/01/2017] [Indexed: 06/07/2023]
Abstract
The environmental safety of carbon nanomaterials (CNMs) has become a hot spot of worldwide research work. The high stability, mobility and adsorption capability of CNMs may give rise to the enhancement of heavy metal transport. However, the understanding of facilitated transport of heavy metal ions by CNMs is still limited. In this research, fullerol nanoparticles (C60(OH)n) were used as a typical CNM to investigate its effect on Cu2+ transport in the water-saturated porous media. Column experiments showed that C60(OH)n could facilitate the transport of Cu2+. Meanwhile, flow velocity showed little impact on the facilitated transport while pH and fullerol concentration played an important role. The mechanism of fullerol-facilitated transport of Cu2+ was mainly due to the much higher adsorption capacity of C60(OH)n than that of the porous media. Besides, the existence of C60(OH)n decreased the adsorption kinetics of Cu2+ on the porous media, which led to a decreasing chance for Cu2+ to be retained and thus enhanced the transport of Cu2+.
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Affiliation(s)
- Yue Yuan
- National Engineering Laboratory for Industrial Wastewater Treatment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China; Sino-Danish Center for Education and Research, Beijing, 100190, China
| | - Xianjia Peng
- National Engineering Laboratory for Industrial Wastewater Treatment, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Beijing Key Laboratory of Industrial Wastewater Treatment and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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20
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Babakhani P, Bridge J, Doong RA, Phenrat T. Continuum-based models and concepts for the transport of nanoparticles in saturated porous media: A state-of-the-science review. Adv Colloid Interface Sci 2017. [PMID: 28641812 DOI: 10.1016/j.cis.2017.06.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Environmental applications of nanoparticles (NP) increasingly result in widespread NP distribution within porous media where they are subject to various concurrent transport mechanisms including irreversible deposition, attachment/detachment (equilibrium or kinetic), agglomeration, physical straining, site-blocking, ripening, and size exclusion. Fundamental research in NP transport is typically conducted at small scale, and theoretical mechanistic modeling of particle transport in porous media faces challenges when considering the simultaneous effects of transport mechanisms. Continuum modeling approaches, in contrast, are scalable across various scales ranging from column experiments to aquifer. They have also been able to successfully describe the simultaneous occurrence of various transport mechanisms of NP in porous media such as blocking/straining or agglomeration/deposition/detachment. However, the diversity of model equations developed by different authors and the lack of effective approaches for their validation present obstacles to the successful robust application of these models for describing or predicting NP transport phenomena. This review aims to describe consistently all the important NP transport mechanisms along with their representative mathematical continuum models as found in the current scientific literature. Detailed characterizations of each transport phenomenon in regards to their manifestation in the column experiment outcomes, i.e., breakthrough curve (BTC) and residual concentration profile (RCP), are presented to facilitate future interpretations of BTCs and RCPs. The review highlights two NP transport mechanisms, agglomeration and size exclusion, which are potentially of great importance in controlling the fate and transport of NP in the subsurface media yet have been widely neglected in many existing modeling studies. A critical limitation of the continuum modeling approach is the number of parameters used upon application to larger scales and when a series of transport mechanisms are involved. We investigate the use of simplifying assumptions, such as the equilibrium assumption, in modeling the attachment/detachment mechanisms within a continuum modelling framework. While acknowledging criticisms about the use of this assumption for NP deposition on a mechanistic (process) basis, we found that its use as a description of dynamic deposition behavior in a continuum model yields broadly similar results to those arising from a kinetic model. Furthermore, we show that in two dimensional (2-D) continuum models the modeling efficiency based on the Akaike information criterion (AIC) is enhanced for equilibrium vs kinetic with no significant reduction in model performance. This is because fewer parameters are needed for the equilibrium model compared to the kinetic model. Two major transport regimes are identified in the transport of NP within porous media. The first regime is characterized by higher particle-surface attachment affinity than particle-particle attachment affinity, and operative transport mechanisms of physicochemical filtration, blocking, and physical retention. The second regime is characterized by the domination of particle-particle attachment tendency over particle-surface affinity. In this regime although physicochemical filtration as well as straining may still be operative, ripening is predominant together with agglomeration and further subsequent retention. In both regimes careful assessment of NP fate and transport is necessary since certain combinations of concurrent transport phenomena leading to large migration distances are possible in either case.
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21
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Liao P, Li W, Wang D, Jiang Y, Pan C, Fortner JD, Yuan S. Effect of reduced humic acid on the transport of ferrihydrite nanoparticles under anoxic conditions. WATER RESEARCH 2017; 109:347-357. [PMID: 27926882 DOI: 10.1016/j.watres.2016.11.069] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/27/2016] [Accepted: 11/30/2016] [Indexed: 06/06/2023]
Abstract
Humic acid (HA) occurs ubiquitously in the subsurface environments and is well-known to play a critical role in the fate and transport of ferrihydrite nanoparticles (NPs) and NPs-associated contaminants. Under anoxic conditions, HA can readily be reduced by microorganisms or geochemical reducing species, and the mechanisms and kinetics of ferrihydrite reduction by reduced HA (HAred) are well-documented; however, the role of these redox reactions on the transport of ferrihydrite NPs is largely underestimated. This study provides new knowledge regarding the role of HA (both reduced HA (HAred) and oxidized HA (HAox)) of environmentally relevant concentrations (0-50 mg C/L) on the transport of ferrihydrite NPs in anoxic sand columns. Our findings show that, regardless of the redox state, the presence of a low concentration of HA (3 mg C/L) inhibited ferrihydrite NP's transport due to enhanced aggregation (and deposition) between positively charged ferrihydrite NPs and negatively charged HA molecules. In contrast, higher HA (both HAred and HAox) concentration (≥10 mg C/L) significantly enhanced the mobility of ferrihydrite NPs, primarily due to the enhanced electrostatic and steric stabilization originating from excessively adsorbed HA molecules. Interestingly, the transport of ferrihydrite NPs is substantially lower in the presence of HAred than in the presence of HAox. This distinct effect (HAred vs. HAox) on the particle transport is attributed to the fact that reductive dissolution of ferrihydrite NPs occurs in the presence of HAred (ferrihydrite dissolves and thus total breakthrough decreases), but not in the presence of HAox. Furthermore, the abatement extent of ferrihydrite NPs transport triggered by the presence of HAred is dependent on dissolved HAred concentration. Taken together, our findings provide direct, and much needed insights into the distinct roles of redox state of HA on the transport of redox-sensitive metal-bearing NPs in porous media.
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Affiliation(s)
- Peng Liao
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan, 430074, PR China
| | - Wenlu Li
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, United States
| | - Dengjun Wang
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE, 19716, United States
| | - Yi Jiang
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, United States
| | - Chao Pan
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, United States
| | - John D Fortner
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, United States
| | - Songhu Yuan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 388 Lumo Road, Wuhan, 430074, PR China.
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Liao P, Yuan S, Wang D. Impact of Redox Reactions on Colloid Transport in Saturated Porous Media: An Example of Ferrihydrite Colloids Transport in the Presence of Sulfide. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:10968-10977. [PMID: 27654458 DOI: 10.1021/acs.est.6b02542] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transport of colloids in the subsurface is an important environmental process with most research interests centered on the transport in chemically stable conditions. While colloids can be formed under dynamic redox conditions, the impact of redox reactions on their transport is largely overlooked. Taking the redox reactions between ferrihydrite colloids and sulfide as an example, we investigated how and to what extent the redox reactions modulated the transport of ferrihydrite colloids in anoxic sand columns over a range of environmentally relevant conditions. Our results reveal that the presence of sulfide (7.8-46.9 μM) significantly decreased the breakthrough of ferrihydrite colloids in the sand column. The estimated travel distance of ferrihydrite colloids in the absence of sulfide was nearly 7-fold larger than that in the presence of 46.9 μM sulfide. The reduced breakthrough was primarily attributed to the reductive dissolution of ferrihydrite colloids by sulfide in parallel with formation of elemental sulfur (S(0)) particles from sulfide oxidation. Reductive dissolution decreased the total mass of ferrihydrite colloids, while the negatively charged S(0) decreased the overall zeta potential of ferrihydrite colloids by attaching onto their surfaces and thus enhanced their retention in the sand. Our findings provide novel insights into the critical role of redox reactions on the transport of redox-sensitive colloids in saturated porous media.
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Affiliation(s)
- Peng Liao
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , 388 Lumo Road, Wuhan 430074, P. R. China
| | - Songhu Yuan
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences , 388 Lumo Road, Wuhan 430074, P. R. China
| | - Dengjun Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences , 71 East Beijing Road, Nanjing 210008, P. R. China
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