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Valenzuela EF, Minho LAC, Menezes HC, Cardeal ZL. Determination of pesticide residue in marginal lagoons of natural parks in Brazil using an improved calibrate passive sampler. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168003. [PMID: 37914113 DOI: 10.1016/j.scitotenv.2023.168003] [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: 07/18/2023] [Revised: 10/08/2023] [Accepted: 10/19/2023] [Indexed: 11/03/2023]
Abstract
Passive sampling is a sensitive and efficient method for analyzing pesticides in water. This article describes a hollow fiber liquid-phase microextraction (HF-LPME) device that was improved using polypropylene membranes grafted with nanocellulose for the passive sampling of pesticides in water. A comprehensive gas chromatography time-of-flight mass spectrometry (GCxGC/Q-TOFMS) system was used to separate, identify, and quantify pesticides. The sampling rates of 38 moderately hydrophobic to hydrophobic agricultural pesticides (2.18 < log Kow < 6.89) from different chemical classes, including the main triazine, organochlorine and organophosphate compounds, were calculated. A calibration process was applied to evaluate the role of flow velocity and select potential candidates for a possible performance reference compound (PRC). Sampling rates varied between 0.17 mL d-1 and 23.15 mL d-1. The accumulation curves identified linear periods ranging from 3 to 18 days. The new passive sampler device was applied for 8 days in rivers and marginal lagoons of natural parks of the São Francisco basin in Minas Gerais, Brazil and identified 10 target pesticides. Furthermore, 10 non-targeted pesticides were detected by the GCxGC/Q-TOFMS method.
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Affiliation(s)
- Eduard F Valenzuela
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil
| | - Lucas A C Minho
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil
| | - Helvécio C Menezes
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil
| | - Zenilda L Cardeal
- Departamento de Química, ICEx, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, 31270901 Belo Horizonte, MG, Brazil.
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2
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Zhang J, Wang D, Li Y, Liu L, Liang Y, He B, Hu L, Jiang G. Application of three-dimensional printing technology in environmental analysis: A review. Anal Chim Acta 2023; 1281:341742. [PMID: 38783729 DOI: 10.1016/j.aca.2023.341742] [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: 03/24/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 05/25/2024]
Abstract
The development of environmental analysis devices with high performance is essential to assess the potential risks of environmental pollutants. However, it is still challenging to develop environmental analysis equipment with miniaturization, portability, and high sensitivity based on traditional processing techniques. In recent years, the popularity of 3D printing technology (3DP) with high precision, low cost, and unlimited design freedom has provided opportunities to solve the existing challenges of environmental analysis. 3D printing has brought solutions to promote the high performance and versatility of environmental analysis equipment by optimizing printing materials, enhancing equipment structure, and integrating multidisciplinary technology. In this paper, we comprehensively review the latest progress in 3D printing in various aspects of environmental analysis procedures, including but not limited to sample collection, pretreatment, separation, and detection. We highlight their advantages and challenges in determining various environmental contaminants through passive sampling, solid-phase extraction, chromatographic separation, and mass spectrometry detection. The manufacturing of 3D-printed environmental analysis devices is also discussed. Finally, we look forward to their development prospects and challenges.
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Affiliation(s)
- Junpeng Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dingyi Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yingying Li
- School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
| | - Lihong Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yong Liang
- Institute of Environment and Health, Jianghan University, Wuhan, 430056, China
| | - Bin He
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
| | - Ligang Hu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China; Institute of Environment and Health, Jianghan University, Wuhan, 430056, China.
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China; School of Environment, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China
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3
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Richardson AK, Irlam RC, Wright HR, Mills GA, Fones GR, Stürzenbaum SR, Cowan DA, Neep DJ, Barron LP. A miniaturized passive sampling-based workflow for monitoring chemicals of emerging concern in water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 839:156260. [PMID: 35644406 DOI: 10.1016/j.scitotenv.2022.156260] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/06/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
The miniaturization of a full workflow for identification and monitoring of contaminants of emerging concern (CECs) is presented. Firstly, successful development of a low-cost small 3D-printed passive sampler device (3D-PSD), based on a two-piece methacrylate housing that held up to five separate 9 mm disk sorbents, is discussed. Secondly, a highly sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) method reduced the need for large scale in-laboratory apparatus, solvent, reagents and reference material quantities for in-laboratory passive sampler device (PSD) calibration and extraction. Using hydrophilic-lipophilic balanced sorbents, sampling rates (Rs) were determined after a low 50 ng L-1 exposure over seven days for 39 pesticides, pharmaceuticals, drug metabolites and illicit drugs over the range 0.3 to 12.3 mL day-1. The high sensitivity LC-MS/MS method enabled rapid analysis of river water using only 10 μL of directly injected sample filtrate to measure occurrence of 164 CECs and sources along 19 sites on the River Wandle, (London, UK). The new 3D-PSD was then field-tested over seven days at the site with the highest number and concentration of CECs, which was down-river from a wastewater treatment plant. Almost double the number of CECs were identified in 3D-PSD extracts across sites in comparison to water samples (80 versus 42 CECs, respectively). Time-weighted average CEC concentrations ranged from 8.2 to 845 ng L-1, which were generally comparable to measured concentrations in grab samples. Lastly, high resolution mass spectrometry-based suspect screening of 3D-PSD extracts enabled 113 additional compounds to be tentatively identified via library matching, many of which are currently or are under consideration for the EU Watch List. This miniaturized workflow represents a new, cost-effective, and more practically efficient means to perform passive sampling chemical monitoring at a large scale. SYNOPSIS: Miniaturized, low cost, multi-disk passive samplers enabled more efficient multi-residue chemical contaminant characterization, potentially for large-scale monitoring programs.
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Affiliation(s)
- Alexandra K Richardson
- Dept. Analytical, Environmental & Forensic Sciences, Institute of Pharmaceutical Sciences, School of Cancer and Pharmaceutical Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, United Kingdom; Environmental Research Group, MRC Centre for Environment & Health, School of Public Health, Faculty of Medicine, Imperial College London, 86 Wood Lane, London W12 0BZ, United Kingdom
| | - Rachel C Irlam
- Dept. Chemistry, School of Natural and Environmental Sciences, Newcastle University, Newcastle-upon-Tyne, NE1 7RU, United Kingdom
| | - Helena Rapp Wright
- Environmental Research Group, MRC Centre for Environment & Health, School of Public Health, Faculty of Medicine, Imperial College London, 86 Wood Lane, London W12 0BZ, United Kingdom
| | - Graham A Mills
- Faculty of Science and Health, University of Portsmouth, White Swan Road, Portsmouth PO1 2DT, United Kingdom
| | - Gary R Fones
- Faculty of Science and Health, University of Portsmouth, White Swan Road, Portsmouth PO1 2DT, United Kingdom
| | - Stephen R Stürzenbaum
- Dept. Analytical, Environmental & Forensic Sciences, Institute of Pharmaceutical Sciences, School of Cancer and Pharmaceutical Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - David A Cowan
- Dept. Analytical, Environmental & Forensic Sciences, Institute of Pharmaceutical Sciences, School of Cancer and Pharmaceutical Sciences, Faculty of Life Sciences & Medicine, King's College London, 150 Stamford Street, London SE1 9NH, United Kingdom
| | - David J Neep
- Agilent Technologies UK Ltd, Essex Road, Church Stretton SY6 6AX, United Kingdom
| | - Leon P Barron
- Environmental Research Group, MRC Centre for Environment & Health, School of Public Health, Faculty of Medicine, Imperial College London, 86 Wood Lane, London W12 0BZ, United Kingdom.
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Nitti F, Almeida MIG, Morrison R, Cattrall RW, Pettigrove VJ, Coleman RA, Kolev SD. Flow-through passive sampler for zinc in freshwaters free from flow pattern, water cationic composition and temperature effects. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Kiwfo K, Woi PM, Seanjum C, Grudpan K. New designs of paper based analytical devices (PADs) for completing replication analysis of a sample within a single run by employing smartphone. Talanta 2022; 236:122848. [PMID: 34635238 DOI: 10.1016/j.talanta.2021.122848] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/28/2021] [Accepted: 09/03/2021] [Indexed: 01/01/2023]
Abstract
Paper-based analytical devices (PADs) with four new designs could be fabricated using commercially available home-based scan-and-cut printer. They serve for miniaturised platforms for chemical analysis. Replication analysis of a sample together with the calibration (using the analyte standards at different concentrations) can be completed in a single run, by utilising smartphone as the detector. Some new approaches for choosing detection zones were suggested. The four proposed PAD designs here were used as models in microliter scale operation to demonstrate the well-known chemistries of colorimetric determinations of iron, phosphate, and hardness using 1,10-phenanthroline and simple aqueous guava leaf extract; molybdate, and EBT-EDTA complexometric titration, respectively, through calibrations: where Blue (B) value = 88.2log [Fe3+] - 80.8, R2 = 0.989; B value = 1.75 [Fe3+] + 0.198, R2 = 0.999; Grey scale (I) value = 1.77 [Fe3+] - 1.22, R2 = 0.997; Red (R) value = 16.1log [PO43-] + 8.95, R2 = 0.999; Hue (H) value = 43.3log [Ca2+] + 233, R2 = 0.994, respectively. For the hardness, using one of the PAD designs, true titration was also possible. Applications of the proposed devices and procedures were demonstrated for real world samples with validation. Additionally, kinetic study of the molybdenum blue for phosphate was demonstrated using one of the PADs.
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Affiliation(s)
- Kanokwan Kiwfo
- Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand; Cluster of Excellence on Biodiversity-based Economic and Society (B.BES-CMU), Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Pei Meng Woi
- Chemistry Department, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Chalermpong Seanjum
- Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand; Cluster of Excellence on Biodiversity-based Economic and Society (B.BES-CMU), Chiang Mai University, Chiang Mai, 50200, Thailand; Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Kate Grudpan
- Center of Excellence for Innovation in Analytical Science and Technology, Chiang Mai University, Chiang Mai, 50200, Thailand; Cluster of Excellence on Biodiversity-based Economic and Society (B.BES-CMU), Chiang Mai University, Chiang Mai, 50200, Thailand; Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
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6
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Maiphetlho K, Chimuka L, Tutu H, Richards H. Technical design and optimisation of polymer inclusion membranes (PIMs) for sample pre-treatment and passive sampling - A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 799:149483. [PMID: 34426342 DOI: 10.1016/j.scitotenv.2021.149483] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 07/14/2021] [Accepted: 08/01/2021] [Indexed: 06/13/2023]
Abstract
This review reports on the increasing interest in technical designs, calibration, and application of PIM-based devices in sample pre-treatment and passive sampling in environmental water monitoring from 2010 to 2021. With regards to passive sampling, devices are calibrated in a laboratory setup using either a dip-in or flow-through approach before environmental application. In sample preparation, the device set-ups can be offline, online or in a continuous flow separation device connected to a flow injection analysis system. The PIMs have also demonstrated potential in both these offline and online separations; however, there is still a draw-back of low diffusion coefficients obtained in these PIM set-ups. Electro-driven membrane (EME) extraction has demonstrated better performance as well as improved analyte flux. Critical in electro-driven membrane extraction is applying correct voltage that may not compromise the PIM performance due to leaching of components to the aqueous solutions. Further, besides different PIM configurations and designs being developed, PIM based extractions are central to PIM components (base polymer, carrier and plasticizer). As such, recent studies have also focused on improving PIM stability by investigating use of various PIM components, incorporating nano additives into the PIM composition, and investigating novel green PIM synthetic routes. All these aspects are covered in this review. Further, some recent studies that have demonstrated the ability to eliminate effects of flow patterns and membrane biofouling in PIM based applications are also included.
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Affiliation(s)
- Kgomotso Maiphetlho
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Luke Chimuka
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Hlanganani Tutu
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa
| | - Heidi Richards
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag X3, WITS, 2050 Johannesburg, South Africa.
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7
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Rojas-Challa Y, de Gyves J, Ortega-Muñoz R, Montiel-Aguirre F, González-Albarrán R, Rodríguez de San Miguel E. Comparative study of As (V) uptake in aqueous medium by a polymer inclusion membrane-based passive sampling device and two filamentous fungi (Aspergillus niger and Rhizopus sp.). CHEMOSPHERE 2021; 272:129920. [PMID: 33607495 DOI: 10.1016/j.chemosphere.2021.129920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 01/27/2021] [Accepted: 02/07/2021] [Indexed: 06/12/2023]
Abstract
In this work a polymer inclusion membrane (PIM) is proposed as passive sampler material and compared with two filamentous fungi for As (V) uptake to evaluate its ability as chemical surrogate material for the monitoring of this metalloid in aquatic environments. Results show excellent passive sampling characteristics of the device since a linear uptake profile as a function of time was observed. The correlation coefficients between the PIM passive sampler with Aspergillus niger (r = 0.83) and Rhizopus sp. (r = 0.13) uptake, show that the first species is the best modeled by the PIM, suggesting its potential as a chemical substitute in bioavailability studies.
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Affiliation(s)
- Yahsé Rojas-Challa
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico.
| | - Josefina de Gyves
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico
| | - Raquel Ortega-Muñoz
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico
| | - Fernando Montiel-Aguirre
- Departamento de Biología, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico
| | - René González-Albarrán
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico
| | - Eduardo Rodríguez de San Miguel
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Cd.Mx. 04510, Mexico
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8
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O'Connor Šraj L, Almeida MIGS, Sharp SM, McKelvie ID, Morrison R, Kolev SD. Monitoring of ammonia in marine waters using a passive sampler with biofouling resistance and neural network-based calibration. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:115457. [PMID: 32889515 DOI: 10.1016/j.envpol.2020.115457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/15/2020] [Accepted: 08/17/2020] [Indexed: 06/11/2023]
Abstract
A biofouling resistant passive sampler for ammonia, where the semi-permeable barrier is a microporous hydrophobic gas-diffusion membrane, has been developed for the first time and successfully applied to determine the time-weighted average concentration of ammonia in estuarine and coastal waters for 7 days. Strategies to control biofouling of the membrane were investigated by covering it with either a copper mesh or a silver nanoparticle functionalised cotton mesh, with the former approach showing better performance. The effects of temperature, pH and salinity on the accumulation of ammonia in the newly developed passive sampler were studied and the first two parameters were found to influence it significantly. A universal calibration model for the passive sampler was developed using the Group Method Data Handling algorithm based on seawater samples spiked with known concentrations of total ammonia under conditions ranging from 10 to 30 °C, pH 7.8 to 8.2 and salinity 20 to 35. The newly developed passive sampler is affordable, user-friendly, reusable, sensitive, and can be used to detect concentrations lower than the recently proposed guideline value of 160 μg total NH3-N L-1, for a 99% species protection level, with the lowest concentration measured at 17 nM molecular NH3 (i.e., 8 μg total NH3-N L-1 at pH 8.0 and 20 °C). It was deployed at four field sites in the coastal waters of Nerm (Port Phillip Bay), Victoria, Australia. Good agreement was found between molecular ammonia concentrations obtained with passive and discrete grab sampling methods (relative difference, - 12% to - 19%).
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Affiliation(s)
| | | | - Simon M Sharp
- Centre for Aquatic Pollution Identification and Management (CAPIM), The University of Melbourne, Victoria, 3010, Australia
| | - Ian D McKelvie
- School of Chemistry, The University of Melbourne, Victoria, 3010, Australia
| | - Richard Morrison
- School of Chemistry, The University of Melbourne, Victoria, 3010, Australia
| | - Spas D Kolev
- School of Chemistry, The University of Melbourne, Victoria, 3010, Australia
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González-Albarrán R, de Gyves J, Rodríguez de San Miguel E. Influence of some physicochemical parameters on the passive sampling of copper (II) from aqueous medium using a polymer inclusion membrane device. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 258:113474. [PMID: 31859125 DOI: 10.1016/j.envpol.2019.113474] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/02/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
Recently polymer inclusion membranes (PIMs) have been proposed as materials for passive sampling, nonetheless a theoretical base to describe the mass transfer process through those materials, under such conditions of monitoring, has not been elucidated. Under the assumption that: (i) the transport of the metal ion occurs at steady state conditions, (ii) the concentration gradients are linear, and (iii) the kinetics of the chemical reactions in the extraction process on the membrane are elemental; an equation for the passive sampling of copper (II) using a PIM system containing Kelex-100 as carrier is derived. The prediction capacity of this sampler under different conditions of temperature, metal concentration, flow velocity, ionic strength and pH is analyzed as well. Among the dependencies of the PIM on the physicochemical conditions, effects of concentration, temperature and flow velocity tend to increment copper (II) flux across the membrane, being the parameter temperature the one with the most pronounced effect at T ≥ 30 °C. Ionic strength had no great effect on passive sampler response, however the sampler is dependent on the acidity of the medium. The comparable metal ion concentrations estimated from the PIM sampler to those obtained by direct measurements of the sampling medium suggest that PIMs can be robust materials when used as passive sampler devices.
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Affiliation(s)
- René González-Albarrán
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, CdMx, Mexico
| | - Josefina de Gyves
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, CdMx, Mexico
| | - Eduardo Rodríguez de San Miguel
- Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, CdMx, Mexico.
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