1
|
Yang Y, Wang K, Liu X, Xu C, You Q, Zhang Y, Zhu L. Environmental behavior of silver nanomaterials in aquatic environments: An updated review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167861. [PMID: 37852494 DOI: 10.1016/j.scitotenv.2023.167861] [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: 07/31/2023] [Revised: 09/25/2023] [Accepted: 10/13/2023] [Indexed: 10/20/2023]
Abstract
The increasing applications of silver nanomaterials (nano-Ag) and their inevitable release posed great potential risks to aquatic organisms and ecosystems. Considerable attention has been attracted on their behaviors and transformations, which were critically important for their subsequent biological toxicities and ecological effects. Therefore, the summary of the recent efforts on the environmental behavior of nano-Ag would be beneficial for understanding the environmental fate and accurate risk assessment. This review summarized the studies on various physical, chemical and biological transformations of nano-Ag, meanwhile, the influencing factors (including the intrinsic properties and environmental conditions) and related mechanisms were highlighted. Surface structure and facets of nano-Ag, abiotic conditions and natural freeze-thaw cycle processes could affect the transformations of nano-Ag under different environmental scenarios (including freshwater, seawater and wastewater). The interactions with co-present components, such as chemicals and other particles, impacted the multiple processes of nano-Ag. Besides, the contradictory effects and mechanisms by several environmental factors were summarized. Lastly, the key knowledge gaps and some aspects that deserve further investigation were also addressed. Therefore, the current review aimed to provide an overall analysis of transformation processes of nano-Ag, which will provide more available information and pave the way for the future research areas.
Collapse
Affiliation(s)
- Yi Yang
- 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
| | - Kunkun Wang
- 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
| | - Xinwei Liu
- 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
| | - Chunyi Xu
- 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
| | - Qi You
- 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
| | - Yinqing Zhang
- 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.
| | - Lingyan Zhu
- 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
| |
Collapse
|
2
|
Qiao YJ, Kang J, Song CQ, Zhou N, Zhang P, Song GF. Further study on particle size, stability, and complexation of silver nanoparticles under the composite effect of bovine serum protein and humic acid. RSC Adv 2024; 14:2621-2632. [PMID: 38234870 PMCID: PMC10793641 DOI: 10.1039/d3ra06159k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Accepted: 12/20/2023] [Indexed: 01/19/2024] Open
Abstract
Silver nanoparticles (AgNPs) are widely used due to their unique antibacterial properties and excellent photoelectric properties. Wastewater treatment plants form a pool of AgNPs due to the social cycle of wastewater. During biological treatment processes, the particle size and stability of AgNPs change. We studied the particle size changes and stability of silver nanoparticles in the presence of bovine serum albumin (BSA) and humic acid (HA). The experimental results indicated that silver nanoparticles can complex with the functional groups in BSA. For AgNP-BSA composites, as the BSA concentration increases, the size of the silver nanoparticles first decreases and then increases. AgNPs can combine with the amide, amino, and carboxyl groups in HA. As the concentration of HA increases, the particle size and large particle size distribution of AgNPs increase. This increasing trend is more obvious when the HA concentration is lower than 20 mg L-1. When HA and BSA exist at the same time, HA will occupy the adsorption sites of BSA on the surface of AgNPs, and the AgNP-HA complex will dominate the system. This study aims to provide key operational control strategies for the process operation of wastewater treatment plants containing AgNPs and theoretical support for promoting water environment improvement and economic development such as tourism.
Collapse
Affiliation(s)
- Yu-Jing Qiao
- Physical Education College of Zhengzhou University Zhengzhou 450044 China
| | - Jia Kang
- School of Environmental and Municipal Engineering and Ural Institute, North China University of Water Resources and Electric Power Zhengzhou 450046 China
| | - Chu-Qiong Song
- Henan Urban Planning and Design Institute Co., Ltd Zhengzhou 450044 China
| | - Ning Zhou
- School of Environmental and Municipal Engineering and Ural Institute, North China University of Water Resources and Electric Power Zhengzhou 450046 China
| | - Peng Zhang
- School of Environmental and Municipal Engineering and Ural Institute, North China University of Water Resources and Electric Power Zhengzhou 450046 China
| | - Gang-Fu Song
- School of Environmental and Municipal Engineering and Ural Institute, North China University of Water Resources and Electric Power Zhengzhou 450046 China
| |
Collapse
|
3
|
Li H, Qiao D, Chu M, Guo L, Sun Z, Fan Y, Ni SQ, Tung CH, Wang Y. Accumulation of Ag(0) Single Atoms at Water/Mineral Interfaces during Sunlight-Induced Reduction of Ionic Ag by Phenolic DOM. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:20822-20829. [PMID: 38014909 DOI: 10.1021/acs.est.3c05922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Silver (Ag) undergoes a complex and dynamic Ag+/Ag0 cycle under environmental conditions. The Ag+ → Ag nanoparticles (AgNPs) transformation due to the combined actions of sunlight, O2, and dissolved organic matter has been a well-known environmental phenomenon. In this study, we indicate that this process may be accompanied by a pronounced accumulation of Ag(0) single atoms (Ag-SAs) on the minerals' surfaces. According to spherical aberration-corrected scanning transmission electron microscopy and high-energy-resolution X-ray adsorption fine structure analyses, humic acid (HA) and phenol (PhOH) can induce Ag-SAs accumulation, whereas oxalic acid causes only AgNPs deposition. Ag-SAs account for more than 20 wt % of total Ag(0) on the γ-Al2O3 surfaces during HA- and PhOH-mediated photolysis processes. HA also causes Ag-SAs to accumulate on two other prevalent soil minerals, SiO2 and Fe2O3, and the fractions of Ag-SAs are about 15 wt %. Our mechanism studies suggest that a phenolic molecule acts as a reducing agent of Ag+ and a stabilizer of Ag-SAs, protecting Ag-SAs against autocatalytic nucleation.
Collapse
Affiliation(s)
- Haibin Li
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Dan Qiao
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Menghui Chu
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Lirong Guo
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Zhaoli Sun
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yafei Fan
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Shou-Qing Ni
- Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Chen-Ho Tung
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Yifeng Wang
- Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| |
Collapse
|
4
|
Jiang J, Wang X, Zhang Y, Zhang J, Gu X, He S, Duan S, Ma J, Wang L, Luo P. The Aggregation and Dissolution of Citrate-Coated AgNPs in High Ammonia Nitrogen Wastewater and Sludge from UASB-Anammox Reactor. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:9502. [PMID: 35954858 PMCID: PMC9367828 DOI: 10.3390/ijerph19159502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 12/07/2022]
Abstract
Silver nanoparticles (AgNPs) are released into the sewage pipes and ultimately wastewater treatment plants during manufacturing, use, and end-life disposal. AgNPs in wastewater treatment plants aggregate or dissolve, and may affect the microbial community and subsequent pollutant removal efficiency. This study aims to quantitatively investigate the fate of AgNPs in synthetic high ammonia nitrogen wastewater (SW) and sludge from an up-flow anaerobic sludge blanket (UASB) anammox reactor using a nanoparticle tracking analysis (NTA), dynamic light scattering (DLS), transmission electron microscope (TEM), and atomic absorption spectroscopy (AAS). Results showed that 18.1 mM NH4+, 2.11 mM Mg2+ in SW caused less negative zeta potential (ζ-potential, -18.4 vs. -37.4 mV), aggregation (388.8 vs. 21.5 nm), and settlement (80%) of citrate-coated AgNPs (cit-AgNPs) in 220 min. The presence of 18.5 mM Cl- in SW formed AgCl2-, AgCl(aq) and eventually promoted the dissolution (9.3%) of cit-AgNPs. Further exposure of SW-diluted AgNPs to sludge (42 mg L-1 humic acid) and induced a more negative ζ-potential (-22.2 vs. -18.4 mV) and smaller aggregates (313.4 vs. 388.8 nm) due to the steric and hindrance effect. The promoted Ag dissolution (34.4% vs. 9.3%) was also observed after the addition of sludge and the possible reason may be the production of Ag(NH3)2+ by the coexistence of HA from sludge and NH4+ from SW. These findings on the fate of AgNPs can be used to explain why AgNPs had limited effects on the sludge-retained bacteria which are responsible for the anammox process.
Collapse
Affiliation(s)
- Jiachao Jiang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
- Jiangsu Key Laboratory of Resources and Environmental Information Engineering, China University of Mining and Technology, Xuzhou 221116, China
| | - Xin Wang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Yuanyuan Zhang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Jiageng Zhang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Xiujun Gu
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Shilong He
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Shuo Duan
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
| | - Jianli Ma
- Solid Waste and Soil Environment Research Centre, Tianjin Academy of Eco–Environmental Sciences, Tianjin 300191, China;
| | - Lizhang Wang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| | - Ping Luo
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, 1 Daxue Road, Xuzhou 221116, China; (X.W.); (Y.Z.); (J.Z.); (X.G.); (S.H.); (L.W.)
| |
Collapse
|
5
|
Wei Y, Liu X, Wang Z, Chi Y, Yue T, Dai Y, Zhao J, Xing B. Adsorption and catalytic degradation of preservative parabens by graphene-family nanomaterials. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150520. [PMID: 34600213 DOI: 10.1016/j.scitotenv.2021.150520] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/16/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
Parabens pose increasing threats to human health due to endocrine disruption activity. Adsorption and degradation of parabens by three types of graphene-family nanomaterials (GFNs) were therefore investigated. For a given paraben, the maximum adsorption capacities (Q0) followed the order of reduced graphene oxide (RGO) > multilayered graphene (MG) > graphene oxide (GO); for a given GFN, Q0 followed the order of butylparaben (BuP) > propylparaben (PrP) > ethylparaben (EtP) > methylparaben (MeP), dominated by hydrophobic interaction. MeP removal by all the three GFNs was highly enhanced (0.55-4.37 times) with the assistance of H2O2 due to additional catalytic degradation process, and MG showed the highest removal enhancement. ∙OH was confirmed as the dominant radicals responsible for parabens degradation. For MG and RGO, the metal impurities (Fe, Cu, Mn, and Co) initiated Fenton-like reaction with H2O2 to generate ∙OH. GO contained oxygen-centered free radicals, which were responsible for ∙OH formation via transferring electron to H2O2. Four degradation byproducts of MeP were identified, including oxalic, propanedioic, fumaric, and 2,5-dihydroxybenzoic acids. Combined with density function theory calculations, the degradation sites and pathways were identified and confirmed. These findings provide useful information on mechanistic understanding towards the adsorption and degradation of parabens by GFNs.
Collapse
Affiliation(s)
- Yongpeng Wei
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Xia Liu
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Yuantong Chi
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China
| | - Tongtao Yue
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China
| | - Yanhui Dai
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China
| | - Jian Zhao
- Institute of Coastal Environmental Pollution Control, Key Laboratory of Marine Environment and Ecology, Ministry of Education, Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA, 01003, USA.
| |
Collapse
|
6
|
Yonathan K, Mann R, Mahbub KR, Gunawan C. The impact of silver nanoparticles on microbial communities and antibiotic resistance determinants in the environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 293:118506. [PMID: 34793904 DOI: 10.1016/j.envpol.2021.118506] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/14/2021] [Accepted: 11/13/2021] [Indexed: 06/13/2023]
Abstract
Nanosilver (NAg) is currently one of the major alternative antimicrobials to control microorganisms. With its broad-spectrum efficacy and lucrative commercial values, NAg has been used in medical devices and increasingly, in consumer products and appliances. This widespread use has inevitably led to the release and accumulation of the nanoparticle in water and sediment, in soil and even, wastewater treatment plants (WWTPs). This Article describes the physical and chemical transformations of NAg as well as the impact of the nanoparticle on microbial communities in different environmental settings; how the nanoparticle shifts not only the diversity and abundance of microbes, including those that are important in nitrogen cycles and decomposition of organic matters, but also their associated genes and in turn, the key metabolic processes. Current findings on the microbiological activity of the leached soluble silver, solid silver particulates and their respective transformed products, which underpin the mechanism of the nanoparticle toxicity in environmental microbes, is critically discussed. The Article also addresses the emerging evidence of silver-driven co-selection of antibiotic resistance determinants. The mechanism has been linked to the increasing pools of many antibiotic resistance genes already detected in samples from different environmental settings, which could ultimately find their ways to animals and human. The realized ecological impact of NAg calls for more judicial use of the nanoparticle. The generated knowledge can inform strategies for a better 'risks versus benefits' assessment of NAg applications, including the disposal stage.
Collapse
Affiliation(s)
- Kevin Yonathan
- iThree Institute, University of Technology Sydney, 15 Broadway, Ultimo, NSW 2007, Australia
| | - Riti Mann
- iThree Institute, University of Technology Sydney, 15 Broadway, Ultimo, NSW 2007, Australia
| | - Khandaker Rayhan Mahbub
- School of Life Sciences, University of Technology Sydney, 15 Broadway, Ultimo, NSW 2007, Australia; South Australian Research and Development Institute, Primary Industries and Regions SA, Urrbrae, SA 5064, Australia
| | - Cindy Gunawan
- iThree Institute, University of Technology Sydney, 15 Broadway, Ultimo, NSW 2007, Australia; School of Chemical Engineering, University of New South Wales, NSW 2052, Australia.
| |
Collapse
|
7
|
Song Y, Li X, Li C, Li J, Dong Z, Zhang M, Qi P, Bai X, Jiang K. Exploring and comparing the roles of Ca2+ and Mg2+ in small-sized natural organics-induced charged nanofiltration membrane fouling. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117415] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
8
|
Che G, Zhang Q, Lin L, Chen W, Li X, Li L. Unraveling influence of metal species on norfloxacin removal by mesoporous metallic silicon adsorbent. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:35638-35649. [PMID: 32613501 DOI: 10.1007/s11356-020-09829-3] [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: 04/16/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Metal-modified adsorbent had appreciable adsorption capacity and fast rate toward norfloxacin (NOR), but limited studies focused on the influence of metal species on adsorbents' performance. In this study, Fe and Cu were chosen to be loaded on mesoporous silicon SBA-15 for absorbing NOR and investigating the key function of metal species. An obvious synergy effect was found between active species and supporter. A high adsorption capacity (44.8 mg g-1 for Fe/SBA-15 and 78.3 mg g-1 for Cu/SBA-15) and short equilibration time (< 2 h) were obtained. NOR adsorptions on two processes were described well by pseudo-second-order kinetics, particle diffusion equation, and Langmuir isotherm. The adsorption processes were spontaneous, but NOR adsorption on Cu/SBA-15 was endothermic while its adsorption on Fe/SBA-15 was exothermic. HA had dual effect on the adsorption efficiency, with a promotion at low HA concentration but an inhibition at high concentration. NOR removal increased first and then decreased with pH ascension from 3 to 9 for both Fe/SBA-15 and Cu/SBA-15, achieving maximum at pH = 7. Comparative characterizations and experiments suggested that NOR adsorption processes were dominated by electrostatic interactions, n-π EDA interactions, hydrogen bonds, and surface complex. The greater n-π EDA and complex efficiency of Cu with NOR resulted in the superior performance of Cu/SBA-15. Graphical abstract.
Collapse
Affiliation(s)
- Guiquan Che
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Qiuyun Zhang
- School of Environment, South China Normal University, Guangzhou, 510006, China
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou, 510006, China
- Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China
- Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Lin Lin
- School of Environment, South China Normal University, Guangzhou, 510006, China
| | - Weirui Chen
- School of Environment, South China Normal University, Guangzhou, 510006, China.
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou, 510006, China.
- Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China.
- Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China.
| | - Xukai Li
- School of Environment, South China Normal University, Guangzhou, 510006, China
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou, 510006, China
- Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China
- Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China
| | - Laisheng Li
- School of Environment, South China Normal University, Guangzhou, 510006, China.
- Key Laboratory of Theoretical Chemistry of Environment, Ministry of Education, Guangzhou, 510006, China.
- Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety, Guangzhou, 510006, China.
- Guangdong Provincial Key Lab of Functional Materials for Environmental Protection, Guangzhou, 510006, China.
| |
Collapse
|
9
|
Zhou JY, Luo ZY, Yin MJ, Wang N, Qin Z, Lee KR, An QF. A comprehensive study on phase inversion behavior of a novel polysulfate membrane for high-performance ultrafiltration applications. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118404] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
10
|
Fernando I, Tay YY, Karunasekera H, Zhou Y. Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy. Anal Chim Acta 2020; 1104:47-52. [PMID: 32106956 DOI: 10.1016/j.aca.2019.12.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/06/2019] [Accepted: 12/30/2019] [Indexed: 10/25/2022]
Abstract
The properties of the solution matrix play a prominent role in determining the interactions between the silver nanoparticles (AgNPs) when they are present in the aquatic environment. Here, using in situ liquid cell transmission electron microscopy (LCTEM), we show that the interaction of AgNPs is predominantly affected by the solution pH. Reducing the pH in the solution will accelerate the aggregation of AgNPs due to the alteration of the charge cloud around the NPs. Aggregates formed in this scenario were non spherical and irregular shaped and were stable under the electron beam irradiation. Individual AgNPs and smaller aggregates moved randomly and approached the larger aggregates before the aggregation process came to an end. We found that during the aggregation process, the mode of jump to contact and the pairwise approach of aggregation differed according to the composition of the solution. Observations made using the LCTEM were further explained using empirical formulae. Our observation on the pH induced interactions provides important insights on predicting the behavior of AgNPs released through many anthropogenic activities in the environment.
Collapse
Affiliation(s)
- Ishara Fernando
- Interdisciplinary Graduate School, Nanyang Technological University, 639798, Singapore; Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore
| | - Yee Yan Tay
- Facility for Analysis, Characterization, Testing and Simulation, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; School of Materials Science and Engineering, College of Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Hasith Karunasekera
- School of Electrical & Electronic Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore
| | - Yan Zhou
- Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore; School of Civil & Environmental Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore.
| |
Collapse
|
11
|
Ai Y, Zhao C, Sun L, Wang X, Liang L. Coagulation mechanisms of humic acid in metal ions solution under different pH conditions: A molecular dynamics simulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 702:135072. [PMID: 31731124 DOI: 10.1016/j.scitotenv.2019.135072] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 10/17/2019] [Accepted: 10/18/2019] [Indexed: 06/10/2023]
Abstract
Humic acid (HA) exerts a variety of significant environmental and geochemical influences on the soils, sediments and aqueous environments. The interaction with metal ions induces strong HA-metal complexation, thus effecting the transport of the toxic metals as well as the colloidal aggregation of HA. In the present work, we systematically report and analyze the aggregation mechanisms of HAs in solutions filled with different heavy cations (Ag+, Cd2+ and Cr3+) or common metal ions (Na+, Ca2+ and Al3+) under neutral and low pH conditions by using molecular dynamic simulations. We aim to explore the effects of pH, metal ions type and other possible weak interactions on the aggregation capabilities of HA. Scrutiny of the simulation results showed that the aggregation of HAs under neutral condition was driven by the HA-metal complexation which combined the effects of electrostatic attraction and inter-molecular bridging between cations and COO- groups. Larger extent of aggregation was found in heavy metal ions compared with the common ones. On the other hand, under low pH condition, due to the protonation states of carboxyl and phenolic group, the aggregation of HAs was stabilized mainly by weak forces, such as hydrogen bonds between different functional groups. In addition, other weak interactions such as the hydrophilic and hydrophobic effects, the cation-π interactions have also been proposed to be progressive effects on the coagulation behavior. Our computational studies give supplement to the experimental observation and provide insights into the intrinsic mechanisms of the aggregation behavior of HAs and their complexation with metal ions. Such computational modelling supplied a highly effective tool for qualitatively evaluating their roles in environmental remediation.
Collapse
Affiliation(s)
- Yuejie Ai
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Chaofeng Zhao
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Lu Sun
- Institute of Modern Optics, Nankai University, Tianjin 300350, PR China.
| | - Xiangke Wang
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, PR China
| | - Lijun Liang
- College of Automation, Hangzhou Dianzi University, Hangzhou 310018, PR China
| |
Collapse
|
12
|
Fernando I, Qian T, Zhou Y. Long term impact of surfactants & polymers on the colloidal stability, aggregation and dissolution of silver nanoparticles. ENVIRONMENTAL RESEARCH 2019; 179:108781. [PMID: 31586861 DOI: 10.1016/j.envres.2019.108781] [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: 06/13/2019] [Revised: 08/30/2019] [Accepted: 09/25/2019] [Indexed: 06/10/2023]
Abstract
Cetyl trimethyl ammonium bromide (CTAB), Tween 20, polyvinyl pyrrolidone (PVP) and polyethylene glycol (PEG) are among the commonly used surfactants and polymers to stabilize silver nanoparticles (AgNPs). However, their interactions with AgNPs are different. The impact of these surfactants and polymers on the colloidal stability of freshly synthesized uncoated AgNPs was evaluated through a series of long-term experiments and analyzed in terms of their physical and chemical behavior. The cationic surfactant, CTAB was able to produce a mono modal particle size distribution in a prolonged period without affecting the dissolution. In the presence of Tween 20, a non-ionic surfactant, dissolution was promoted in the long run and the particles were preserved with minimal aggregation. In the presence of the polymers, PVP and PEG, the particle structure was not affected even though dissolution was observed. This study presents important insights on the interactions of AgNPs with surfactants and polymers, which could significantly affect the transformations and fate of AgNPs in the aquatic environment.
Collapse
Affiliation(s)
- Ishara Fernando
- Interdisciplinary Graduate School, Nanyang Technological University, 639798, Singapore; Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141 Singapore
| | - Tingting Qian
- Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141 Singapore; School of Civil & Environmental Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore
| | - Yan Zhou
- Nanyang Environment & Water Research Institute, Advanced Environmental Biotechnology Centre, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141 Singapore; School of Civil & Environmental Engineering, College of Engineering, Nanyang Technological University, 639798, Singapore.
| |
Collapse
|