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Adra HJ, Ryu HB, Jo AH, Lee JH, Choi SJ, Kim YR. Ligand-based magnetic extraction and safety assessment of zinc oxide nanoparticles in food products. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133235. [PMID: 38141311 DOI: 10.1016/j.jhazmat.2023.133235] [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: 10/13/2023] [Revised: 11/27/2023] [Accepted: 12/10/2023] [Indexed: 12/25/2023]
Abstract
Zinc oxide (ZnO) is a zinc supplement widely used in health products and is approved by the FDA as Generally Regarded as Safe (GRAS). However, concerns have arisen regarding the potential health effects of nanoscale ZnO, as its reactivity differs from that of its bulk form. This has led to the need for an efficient method to extract ZnO from food products without altering its physicochemical properties, where conventional methods have proven to be inadequate. This study introduces an innovative approach using starch magnetic particles (SMPs) functionalized with a 12-amino acid peptide modified with five lysines (ZBP), that has specific affinity to ZnO. ZBP@SMPs effectively and rapidly extract intact ZnO from food products, achieving recovery efficiencies ranging from 60% to 90%, all while maintaining its morphology and crystallinity. The diameter of ZnO particles recovered from six commercial food products ranged from 25 to 500 nm, with 33% falling below 100 nm, highlighting the need for a size-dependent toxicity study. However, cytotoxicity assessment on human intestinal Caco-2 cells shows all ZnO samples affects cell proliferation and membrane integrity in a dose-dependent manner due to partial dissolution. This study contributes to understanding the safety of ZnO-containing food products and highlights potential health implications associated with their consumption.
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Affiliation(s)
- Hazzel Joy Adra
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Hyo-Bin Ryu
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Ah-Hyun Jo
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Jun-Hee Lee
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Soo-Jin Choi
- Department of Applied Food System, Major of Food Science & Technology, Seoul Women's University, Seoul 01797, South Korea
| | - Young-Rok Kim
- Institute of Life Sciences and Resources & Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea.
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2
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Jiang C, Liu S, Zhang T, Liu Q, Alvarez PJJ, Chen W. Current Methods and Prospects for Analysis and Characterization of Nanomaterials in the Environment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:7426-7447. [PMID: 35584364 DOI: 10.1021/acs.est.1c08011] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Analysis and characterization of naturally occurring and engineered nanomaterials in the environment are critical for understanding their environmental behaviors and defining real exposure scenarios for environmental risk assessment. However, this is challenging primarily due to the low concentration, structural heterogeneity, and dynamic transformation of nanomaterials in complex environmental matrices. In this critical review, we first summarize sample pretreatment methods developed for separation and preconcentration of nanomaterials from environmental samples, including natural waters, wastewater, soils, sediments, and biological media. Then, we review the state-of-the-art microscopic, spectroscopic, mass spectrometric, electrochemical, and size-fractionation methods for determination of mass and number abundance, as well as the morphological, compositional, and structural properties of nanomaterials, with discussion on their advantages and limitations. Despite recent advances in detecting and characterizing nanomaterials in the environment, challenges remain to improve the analytical sensitivity and resolution and to expand the method applications. It is important to develop methods for simultaneous determination of multifaceted nanomaterial properties for in situ analysis and characterization of nanomaterials under dynamic environmental conditions and for detection of nanoscale contaminants of emerging concern (e.g., nanoplastics and biological nanoparticles), which will greatly facilitate the standardization of nanomaterial analysis and characterization methods for environmental samples.
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Affiliation(s)
- Chuanjia Jiang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, 38 Tongyan Rd., Tianjin 300350, China
| | - Songlin Liu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, 38 Tongyan Rd., Tianjin 300350, China
| | - Tong Zhang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, 38 Tongyan Rd., Tianjin 300350, China
| | - Qian Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Wei Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, 38 Tongyan Rd., Tianjin 300350, China
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3
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Serbest H, Bakırdere S, Keyf S. Determination of Silver in Metal Plating Wastewater by Slotted Quartz Tube Flame Atomic Absorption Spectrometry (SQT-FAAS) after Preconcentration with Stearic Acid-Coated Magnetite Nanoparticle-Based Solid-Phase Microextraction (SA-MNP-SPME). ANAL LETT 2021. [DOI: 10.1080/00032719.2021.1986718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Hakan Serbest
- Faculty of Chemical and Metallurgical Engineering, Chemical Engineering Department, Yıldız Technical University, İstanbul, Turkey
| | - Sezgin Bakırdere
- Faculty of Art and Science, Chemistry Department, Yıldız Technical University, İstanbul, Turkey
- Turkish Academy of Sciences (TÜBA), Çankaya, Ankara, Turkey
| | - Seyfullah Keyf
- Faculty of Chemical and Metallurgical Engineering, Chemical Engineering Department, Yıldız Technical University, İstanbul, Turkey
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4
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Wang Y, Chen B, Wang B, He M, Hu B. Phosphoric acid functionalized magnetic sorbents for selective enrichment of TiO 2 nanoparticles in surface water followed by inductively coupled plasma mass spectrometry detection. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 703:135464. [PMID: 31753505 DOI: 10.1016/j.scitotenv.2019.135464] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Phosphoric acid functionalized superparamagnetic iron oxide was synthesized, and different adsorption behavior of TiO2 NPs and titanium ions on it was found. By means of dispersion-corrected density functional theory (DFT-D), the adsorption mechanism of TiO2 NPs and titanium ions on the functionalized sorbents was explored, and the difference in the adsorption behavior was attributed to the different deprotonated forms of phosphates and the competitive adsorption of OH- anion with respect to either TiO2 NPs or aqueous titanium ions. Based on the different adsorption performance of phosphoric acid functionalized sorbents for TiO2 NPs and titanium ions under pH 3, a method by combining magnetic solid phase extraction (MSPE) with inductively coupled plasma mass spectrometry (ICP-MS) was established for the selective quantification of trace TiO2 NPs in environmental water. Under the optimal experimental conditions, the detection limit of TiO2 NPs was 17 ng/L with an enrichment factor of 400. The developed MSPE-ICPMS method was applied to the detection of trace TiO2 NPs in the Yangtze River and the East Lake water. Sub μg/L level of TiO2 NPs was found in the tested water samples, and recoveries of 91-110% and 90-110% were obtained for TiO2 NPs at three concentration levels in spiked water samples, respectively. The developed method exhibited high adsorption capacity and low detection limit for target TiO2 NPs, and was demonstrated with great potential for monitoring TiO2 NPs in the environment.
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Affiliation(s)
- Yin Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China
| | - Beibei Chen
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China
| | - Baoshan Wang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China
| | - Man He
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
| | - Bin Hu
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China
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5
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Zhang H, Junaid M, Liu K, Ras RHA, Ikkala O. Light-induced reversible hydrophobization of cationic gold nanoparticles via electrostatic adsorption of a photoacid. NANOSCALE 2019; 11:14118-14122. [PMID: 31318006 PMCID: PMC8928170 DOI: 10.1039/c9nr05416b] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 07/10/2019] [Indexed: 05/29/2023]
Abstract
The ability to switch the hydrophilicity/hydrophobicity of nanoparticles promises great potential for applications. Here we report a generic approach that allows hydrophobization of cationic surfaces by light-induced photoacid switching from the unbound zwitterionic form to the electrostatically bound anionic form. Importantly, this allows reversible assembly and disassembly of cationic AuNPs, with disassembly kinetics controlled by temperature. The AuNPs can be repeatedly transferred between aqueous and non-polar solvents using light, showing potential in purification processes. In the macroscopic scale, nontrivially, light triggers the in situ hydrophobization of a flat cationized gold surface. The current approach is generic and opens up a new way to control the surface properties and self-assembly of nanoparticles.
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Affiliation(s)
- Hang Zhang
- Department of Applied Physics, Aalto UniversityP.O. Box 15100FI 02150 EspooFinland
| | - Muhammad Junaid
- Department of Applied Physics, Aalto UniversityP.O. Box 15100FI 02150 EspooFinland
| | - Kai Liu
- Department of Applied Physics, Aalto UniversityP.O. Box 15100FI 02150 EspooFinland
| | - Robin H. A. Ras
- Department of Applied Physics, Aalto UniversityP.O. Box 15100FI 02150 EspooFinland
| | - Olli Ikkala
- Department of Applied Physics, Aalto UniversityP.O. Box 15100FI 02150 EspooFinland
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6
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Choleva TG, Tsogas GZ, Giokas DL. Determination of silver nanoparticles by atomic absorption spectrometry after dispersive suspended microextraction followed by oxidative dissolution back-extraction. Talanta 2019; 196:255-261. [DOI: 10.1016/j.talanta.2018.12.053] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/15/2018] [Accepted: 12/18/2018] [Indexed: 12/12/2022]
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7
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Liu X, He M, Chen B, Hu B. Monolithic capillary microextraction combined with ICP-MS for the determination of TiO2 NPs in environmental water samples. Talanta 2019; 197:334-340. [DOI: 10.1016/j.talanta.2019.01.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 01/05/2019] [Accepted: 01/09/2019] [Indexed: 12/19/2022]
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8
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Ligand-assisted magnetic solid phase extraction for fast speciation of silver nanoparticles and silver ions in environmental water. Talanta 2018; 183:268-275. [DOI: 10.1016/j.talanta.2018.02.081] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 02/15/2018] [Accepted: 02/20/2018] [Indexed: 12/30/2022]
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9
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Mandyla SP, Tsogas GZ, Vlessidis AG, Giokas DL. Determination of gold nanoparticles in environmental water samples by second-order optical scattering using dithiotreitol-functionalized CdS quantum dots after cloud point extraction. JOURNAL OF HAZARDOUS MATERIALS 2017; 323:67-74. [PMID: 27021432 DOI: 10.1016/j.jhazmat.2016.03.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/13/2016] [Accepted: 03/15/2016] [Indexed: 06/05/2023]
Abstract
This work presents a new method for the sensitive and selective determination of gold nanoparticles in water samples. The method combines a sample preparation and enrichment step based on cloud point extraction with a new detection motif that relies on the optical incoherent light scattering of a nano-hybrid assembly that is formed by hydrogen bond interactions between gold nanoparticles and dithiotreitol-functionalized CdS quantum dots. The experimental parameters affecting the extraction and detection of gold nanoparticles were optimized and evaluated to the analysis of gold nanoparticles of variable size and surface coating. The selectivity of the method against gold ions and other nanoparticle species was also evaluated under different conditions reminiscent to those usually found in natural water samples. The developed method was applied to the analysis of gold nanoparticles in natural waters and wastewater with satisfactory results in terms of sensitivity (detection limit at the low pmolL-1 levels), recoveries (>80%) and reproducibility (<9%). Compared to other methods employing molecular spectrometry for metal nanoparticle analysis, the developed method offers improved sensitivity and it is easy-to-operate thus providing an additional tool for the monitoring and the assessment of nanoparticles toxicity and hazards in the environment.
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Affiliation(s)
| | - George Z Tsogas
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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10
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Zhao B, Cao X, De La Torre-Roche R, Tan C, Yang T, White JC, Xiao H, Xing B, He L. A green, facile, and rapid method for microextraction and Raman detection of titanium dioxide nanoparticles from milk powder. RSC Adv 2017. [DOI: 10.1039/c7ra02520c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A green, facile, and rapid method for microextraction and Raman detection of titanium dioxide nanoparticles from milk powder is reported.
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Affiliation(s)
- B. Zhao
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
| | - X. Cao
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
| | - R. De La Torre-Roche
- Department of Analytical Chemistry
- The Connecticut Agricultural Experiment Station
- New Haven
- USA
| | - C. Tan
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
| | - T. Yang
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
| | - J. C. White
- Department of Analytical Chemistry
- The Connecticut Agricultural Experiment Station
- New Haven
- USA
| | - H. Xiao
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
| | - B. Xing
- Stockbridge School of Agriculture
- University of Massachusetts
- Amherst
- USA
| | - L. He
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
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11
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Leopold K, Philippe A, Wörle K, Schaumann GE. Analytical strategies to the determination of metal-containing nanoparticles in environmental waters. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.03.026] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Choleva TG, Kappi FA, Tsogas GZ, Vlessidis AG, Giokas DL. In-situ suspended aggregate microextraction of gold nanoparticles from water samples and determination by electrothermal atomic absorption spectrometry. Talanta 2016; 151:91-99. [DOI: 10.1016/j.talanta.2016.01.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 01/11/2016] [Accepted: 01/14/2016] [Indexed: 10/22/2022]
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13
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Guo H, Xing B, White JC, Mukherjee A, He L. Ultra-sensitive determination of silver nanoparticles by surface-enhanced Raman spectroscopy (SERS) after hydrophobization-mediated extraction. Analyst 2016; 141:5261-4. [DOI: 10.1039/c6an01186a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An innovative and ultra-sensitive SERS method that uses a triple-functional surfactant ligand for nanoparticle surface binding, phase transfer and SERS signal reporting was developed for silver nanoparticle (AgNP) detection.
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Affiliation(s)
- Huiyuan Guo
- Stockbridge School of Agriculture
- University of Massachusetts
- Amherst
- USA
| | - Baoshan Xing
- Stockbridge School of Agriculture
- University of Massachusetts
- Amherst
- USA
| | - Jason C. White
- Department of Analytical Chemistry
- The Connecticut Agricultural Experiment Station
- New Haven
- USA
| | - Arnab Mukherjee
- Department of Analytical Chemistry
- The Connecticut Agricultural Experiment Station
- New Haven
- USA
| | - Lili He
- Department of Food Science
- University of Massachusetts
- Amherst
- USA
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14
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Laborda F, Bolea E, Cepriá G, Gómez MT, Jiménez MS, Pérez-Arantegui J, Castillo JR. Detection, characterization and quantification of inorganic engineered nanomaterials: A review of techniques and methodological approaches for the analysis of complex samples. Anal Chim Acta 2016; 904:10-32. [DOI: 10.1016/j.aca.2015.11.008] [Citation(s) in RCA: 199] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/07/2015] [Accepted: 11/13/2015] [Indexed: 10/22/2022]
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15
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Majedi SM, Lee HK. Recent advances in the separation and quantification of metallic nanoparticles and ions in the environment. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2015.08.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Majedi SM, Kelly BC, Lee HK. Toward a robust analytical method for separating trace levels of nano-materials in natural waters: cloud point extraction of nano-copper(II) oxide. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:11811-11822. [PMID: 24293302 DOI: 10.1007/s11356-013-2381-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 11/15/2013] [Indexed: 06/02/2023]
Abstract
Cloud point extraction (CPE) factors, namely Triton X-114 (TX-114) concentration, pH, ionic strength, incubation time, and temperature, were optimized for the separation of nano-sized copper(II) oxide (nCuO) in aqueous matrices. The kinetics of phase transfer was studied using UV-visible spectroscopy. From the highest separation rate, the most favorable conditions were observed with 0.2 % w/v of TX-114, pH = 9.0, ionic strength of 10 mM NaCl, and incubation at 40 °C for 60 min, yielding an extraction efficiency of 89.2 ± 3.9 % and a preconcentration factor of 86. The aggregate size distribution confirmed the formation of very large nCuO-micelle assemblies (11.9 μm) under these conditions. The surface charge of nCuO was also diminished effectively. An extraction efficiency of 91 % was achieved with a mixture of TX-100 and TX-114 containing 30 wt.% of TX-100. Natural organic and particulate matters, represented by humic acid (30 mg/L) and micron-sized silica particles (50 mg/L), respectively, did not significantly reduce the CPE efficiency (<10 %). The recovery of copper(II) ions (20 mg/L) in the presence of humic acid was low (3-10 %). The spiked natural water samples were analyzed either directly or after CPE by inductively coupled plasma mass spectrometry following acid digestion/microwave irradiation. The results indicated the influence of matrix effects and their reduction by CPE. A delay between spiking nCuO and CPE may also influence the recovery of nCuO due to aggregation and dissolution. A detection limit of 0.04 μg Cu/L was achieved for nCuO.
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Affiliation(s)
- Seyed Mohammad Majedi
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Singapore
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17
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Rainieri S, Olasagasti M, Barranco A. Safety assessment of engineered metallic nanoparticles in foodstuff. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2014. [DOI: 10.3920/qas2013.0382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- S. Rainieri
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
| | - M. Olasagasti
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
| | - A. Barranco
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
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18
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Yang M, Zhang P, Hu L, Lu R, Zhou W, Zhang S, Gao H. Ionic liquid-assisted liquid-phase microextraction based on the solidification of floating organic droplets combined with high performance liquid chromatography for the determination of benzoylurea insecticide in fruit juice. J Chromatogr A 2014; 1360:47-56. [DOI: 10.1016/j.chroma.2014.07.076] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 07/19/2014] [Accepted: 07/24/2014] [Indexed: 11/17/2022]
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19
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Majedi SM, Kelly BC, Lee HK. Evaluation of a cloud point extraction approach for the preconcentration and quantification of trace CuO nanoparticles in environmental waters. Anal Chim Acta 2014; 814:39-48. [DOI: 10.1016/j.aca.2014.01.022] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/02/2014] [Accepted: 01/08/2014] [Indexed: 12/28/2022]
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20
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Majedi SM, Kelly BC, Lee HK. Role of combinatorial environmental factors in the behavior and fate of ZnO nanoparticles in aqueous systems: a multiparametric analysis. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:370-379. [PMID: 24316809 DOI: 10.1016/j.jhazmat.2013.11.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 10/14/2013] [Accepted: 11/10/2013] [Indexed: 06/02/2023]
Abstract
To better understand the environmental behavior, fate, and exposure risks of engineered nanoparticles in aquatic systems, for the first time, combinatorial aqueous systems were established using three-level orthogonal array design (OAD), an OA27 (3(1)(3)) matrix, to assess the effects of six co-varying environmental factors (organic acid type, organic acid concentration, NP concentration, pH, salt content, and electrolyte type) on the aggregation of commercial zinc oxide nanoparticles (ZnO NPs, mean diameter ∼41nm). A separate set of OA27 (3(1)(3)) experiments including temperature was conducted for the dissolution of these NPs. The results showed that the organic acid concentration and the pH were the most significant factors (p<0.001) influencing aggregation and dissolution of ZnO NPs, respectively. The electrolyte type and the salt content were the next most important factors in both the aggregation and dissolution. Based on the kinetics study of the aggregation, a high rate of the NP aggregation resulted in decreased dissolution, such that observed in the presence of calcium chloride. Clear temperature-induced aggregation and reduced dissolution were further observed with increasing temperature. This approach demonstrates that the behavior of ZnO NP may vary substantially under combinatorial environmental conditions.
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Affiliation(s)
- Seyed Mohammad Majedi
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Barry C Kelly
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore 117576, Singapore
| | - Hian Kee Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore; National University of Singapore Environmental Research Institute, T-Lab Building #02-01, 5A Engineering Drive 1, Singapore 117411, Singapore.
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