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Yang X, Liu W, Ren Y, Hou X, Li J. Highly Sensitive Fluorescent Sensing for Nitrobenzene of Cd II Complexes Based on Three Isomers and a Bis-Imidazole Ligand. Molecules 2024; 29:2475. [PMID: 38893353 PMCID: PMC11173416 DOI: 10.3390/molecules29112475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 05/17/2024] [Accepted: 05/21/2024] [Indexed: 06/21/2024] Open
Abstract
Detection of nitro pollutants is an important topic in environmental protection. A total of 3 Cd (II) complexes (1-3) based on 3 soft organic isomers, n-(3,5-dicarboxylato benzyloxy) benzoic acid (n = 2, 3 or 4-H3DBB), and a linear N-donor ligand, 3-bis(imidazole-l-ylmethyl) benzene (3-bibz), have been synthesized hydrothermally. Structural diversity of Complexes 1-3 displays the architectural 2D or 3D change: Complex 1 exhibits a 2D network featuring tri-nuclear metal units, Complex 2 is a 3D framework based on similar tri-nuclear metal units, and Complex 3 shows a 3D network with binuclear units. Fluorescent sensing properties exhibited in all these complexes have been discovered to detect nitrobenzene (NB) selectively and sensitively. In particular, Complex 3 possesses high sensitivity for NB with the lowest detection limit of 1.15 × 10-10 M. The results of the theoretical calculation verified the fluorescence detection mechanism of NB by these Cd-based complexes. Therefore, these Cd-based complexes might be used as excellent luminescent sensors for NB.
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Affiliation(s)
| | | | - Yixia Ren
- Laboratory of New Energy and New Function Materials, Shaanxi Key Laboratory of Chemical Reaction Engineering, College of Chemistry and Chemical Engineering, Yan’an University, Yan’an 716000, China; (X.Y.); (W.L.); (X.H.); (J.L.)
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2
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Simultaneous spectrophotometric estimation of nitrobenzene, aniline, and phenol in a ternary mixture using genetic algorithm. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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3
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Abstract
Assessment of water and soil quality is critical for the health, economy, and sustainability of any community. The release of a range of life-threatening pollutants from agriculture, industries, and the residential communities themselves into the different water resources and soil requires of analytical methods intended for their detection. Given the challenge that represents coping with the monitoring of such a diverse and large number of compounds (with over 100,000 chemicals registered, yet in continuous increase), holistic solutions such as electronic tongues (ETs) are emerging as a promising tool for a sustainable, simple, and green monitoring of soil and water resources. In this direction, this review aims to present and critically provide an overview of the basic concepts of ETs, followed by some relevant applications recently reported in the literature in environmental analysis, more specifically, the monitoring of water and wastewater, their quality and the detection of water pollutants as well as soil analysis.
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4
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Electrochemical sensing and photocatalytic degradation of 2,4-dinitrophenol via bismuth (III) oxide nanowires. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132379] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Recent advances in the application of different electrode materials for the determination of 4-hydroxy-nitrobenzene: Review. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Alamry KA, Khan A, Hussein MA, Alfaifi SY. Sensitive electrochemical detection of toxic nitro-phenol in real environmental samples using enzymeless oxidized-carboxymethyl cellulose-sulfate/sulfated polyaniline composite based electrode. Microchem J 2022. [DOI: 10.1016/j.microc.2021.106902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Kongkaew S, Kanatharana P, Thavarungkul P, Limbut W. Studying the preparation, electrochemical performance testing, comparison and application of a cost-effective flexible graphene working electrode. J Colloid Interface Sci 2021; 583:487-498. [PMID: 33017693 DOI: 10.1016/j.jcis.2020.08.121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 08/21/2020] [Accepted: 08/28/2020] [Indexed: 10/23/2022]
Abstract
-A cost-effective flexible graphene working electrode (FGWE) was fabricated using overhead projector transparent film (OPTF) and a screen-printing technique. The surface morphology and electrochemical behavior of the electrode were characterized by scanning electron microscopy and cyclic voltammetry. The electrode presented a very thin layer of conductive ink (16.0 ± 0.7 µm) on a large effective surface area (0.301 ± 0.001 cm-2). The anodic peak current density (jpa) of acetaminophen (ACT) in FGWE was 5.2, 3.7, 3.5 and 6.0 times greater than the jpa of glassy carbon electrode (GCE), flexible carbon working electrode (FCWE), SPE1, and SPE2, respectively. The electrochemical performance of FGWE toward ACT was evaluated by differential pulse voltammetry. Under optimized condition, ACT was quantified in a range of 4-100 µM, with good sensitivity, good accuracy (recovery = 82.3 ± 0.4 to 106 ± 3%), and excellent precision. FGWE was applied to determine ACT in commercial pharmaceutical formulations. The results of the study are in good agreement with those obtained by the standard spectrophotometric method. These results indicate that disposable FGWE is particularly useful for the detection of ACT, and its performance may serve as a platform for cost-effective flexible electrochemical sensors.
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Affiliation(s)
- Supatinee Kongkaew
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Proespichaya Kanatharana
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Panote Thavarungkul
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Warakorn Limbut
- Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
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8
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Birhanzlová - Rumlová T, Barek J, Fischer J, Vyskočil V. Anodic differential pulse voltammetric determination of 2-nitrophenol at a non-traditional carbon film composite electrode. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Hong N, Liu A, Zhu P, Zhan Y, Yang M, Zhang Z, Yang B, Guan Y. Comparative toxicity of organic mixture attached to road deposited sediments: Inadequacy of conventionally using individual pollutants to assess comprehensive hazard effects. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 180:357-365. [PMID: 31102843 DOI: 10.1016/j.ecoenv.2019.05.025] [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: 03/07/2019] [Revised: 05/07/2019] [Accepted: 05/09/2019] [Indexed: 06/09/2023]
Abstract
Organic pollutants attached on road deposited sediments (RDS) during dry days can be washed-off into stormwater runoff during rainfall events, undermining stormwater reuse safety. Previous research studies commonly utilized individual pollutant groups and their quantity to evaluate the hazard effect of pollutants attached to RDS in terms of stormwater reuse. Since many types of organic pollutants are present together rather than individually, conventional approaches might not permit a comprehensive understanding of how appropriately the RDS polluted stormwater can be reused. This study undertook a toxicity test of organic pollutants attached to RDS using Chinese hamster ovary cells (CHO), testing a hypothesis that solely focusing on individual pollutant groups are not adequate to represent hazard effects of resulting stormwater and hence their adequacy for reuse. It is noted that comparative toxicity of RDS is not strongly related to total solids (commonly seen as the key carrier of pollutants) and chemical oxygen demand (COD, representing organic matters). Additionally, the comparison results of spatial distributions of toxicity (in this study) and individual pollutants in previous studies did not show a similar trend. These results imply that toxicity should be also used to indicate how stormwater can be safely reused while solely investigating individual pollutants can not adequately show a comprehensive hazard effect in terms of ensuring stormwater reuse safety. Based on study outcomes, a new assessment approach considering both pollutant and toxicity were proposed. This will assist on effective stormwater reuse and ensuring their reuse safety.
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Affiliation(s)
- Nian Hong
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China
| | - An Liu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China.
| | - Panfeng Zhu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China
| | - Yuting Zhan
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China
| | - Mengting Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China.
| | - Zhenxuan Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China
| | - Bo Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060, Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060, Shenzhen, China
| | - Yuntao Guan
- Guangdong Provincial Engineering Technology Research Centre for Urban Water Cycle and Water Environment Safety, Graduate School at Shenzhen, Tsinghua University, 518055, Shenzhen, China
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10
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Analysis of the Overlapped Electrochemical Signals of Hydrochlorothiazide and Pyridoxine on the Ethylenediamine-Modified Glassy Carbon Electrode by Use of Chemometrics Methods. Molecules 2019; 24:molecules24142536. [PMID: 31373331 PMCID: PMC6680851 DOI: 10.3390/molecules24142536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 07/03/2019] [Accepted: 07/09/2019] [Indexed: 12/17/2022] Open
Abstract
In this work, the electrochemical behavior of hydrochlorothiazide and pyridoxine on the ethylenediamine-modified glassy carbon electrode were investigated by differential pulse voltammetry. In pH 3.4 Britton-Robinson (B-R) buffer solution, both hydrochlorothiazide and pyridoxine had a pair of sensitive irreversible oxidation peaks, that overlapped in the 1.10 V to 1.20 V potential range. Under the optimum experimental conditions, the peak current was linearly related to hydrochlorothiazide and pyridoxine in the concentration range of 0.10-2.0 μg/mL and 0.02-0.40 μg/mL, respectively. Chemometrics methods, including classical least squares (CLS), principal component regression (PCR) and partial least squares (PLS), were introduced to resolve the overlapped signals and determine the two components in mixtures, which avoided the troublesome steps of separation and purification. Finally, the simultaneous determination of the two components in commercial pharmaceuticals was performed with satisfactory results.
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11
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Miletić AS, Pecev-Marinković ET, Grahovac ZM, Pavlović AN, Tošić SB, Mišić IDR. Kinetic Spectrophotometric Method for 4-nitrophenol Determination in Drinking Water. JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1134/s1061934819060066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Facile and Ultrasensitive Determination of 4-Nitrophenol Based on Acetylene Black Paste and Graphene Hybrid Electrode. NANOMATERIALS 2019; 9:nano9030429. [PMID: 30871263 PMCID: PMC6473960 DOI: 10.3390/nano9030429] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/08/2019] [Accepted: 03/11/2019] [Indexed: 01/25/2023]
Abstract
4-nitrophenol (4-NP) is a hazardous waste and a priority toxic pollutant identified by US Environmental Protection Agency (EPA). Hence, in this paper, a voltammetric sensor was proposed for the direct and sensitive detection of 4-nitrophenol (4-NP) at nanomolar level in complex matrices by using graphene and acetylene black paste hybridized electrode (GR/ABPE). Under optimal conditions, the calibration curve demonstrates a linear relationship for 4-NP in the range from 20 nM to 8.0 μM and 8.0 μM to 0.1 mM separately with the detection limit of 8.0 nM. In addition to it, the performance of the GR/ABPE in practical applications was evaluated by detecting 4-NP in various water samples, and satisfactory recoveries were realized. Therefore, GR/ABPE may have a great potential application for facile and sensitive detection of 4-NP in complex matrices at nanomolar level.
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13
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Stoytcheva M, Zlatev R, Velkova Z, Gochev V, Ayala A, Montero G, Valdez B. Resolution of a Mononitrophenol Isomers Mixture by Differential Alternative Pulses Voltammetry. ELECTROANAL 2019. [DOI: 10.1002/elan.201800762] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Roumen Zlatev
- Universidad Autónoma de Baja CaliforniaInstituto de Ingeniería Mexicali México
| | - Zdravka Velkova
- Medical University of PlovdivFaculty of PharmacyDep. Chemical Sciences Plovdiv Bulgaria
| | - Velizar Gochev
- Plovdiv University “P. Hilendarski”Faculty of BiologyDep. Biochemistry and Microbiology Plovdiv Bulgaria
| | - Alan Ayala
- Universidad Autónoma de Baja CaliforniaInstituto de Ingeniería Mexicali México
| | - Gisela Montero
- Universidad Autónoma de Baja CaliforniaInstituto de Ingeniería Mexicali México
| | - Benjamín Valdez
- Universidad Autónoma de Baja CaliforniaInstituto de Ingeniería Mexicali México
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14
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Hong N, Liu A, Zhu P, Zhao X, Guan Y, Yang M, Wang H. Modelling benzene series pollutants (BTEX) build-up loads on urban roads and their human health risks: Implications for stormwater reuse safety. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 164:234-242. [PMID: 30118957 DOI: 10.1016/j.ecoenv.2018.08.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 07/16/2018] [Accepted: 08/08/2018] [Indexed: 06/08/2023]
Abstract
Benzene series compounds (BTEX) are toxic pollutants primarily generated by traffic activities in an urban environment. BTEX pollutants can be deposited (build-up) on urban road surfaces during dry periods and then washed-off into stormwater runoff. Since BTEX pollutants can pose high human health risks, they can undermine stormwater reuse safety after they enter stormwater runoff. In this study, the BTEX pollutants build-up loads on urban road surfaces were investigated in Shenzhen, China. An artificial neural network (ANN) approach and two conventional regression modelling approaches were compared in terms of estimating BTEX build-up loads based on land use related parameters. It was found that the ANN approach had a better performance than the two regression modelling approaches. Additionally, the spatial distribution maps and human health risk map of BTEX pollutants build-up created using the ANN approach can provide a robust visualization platform to identify 'hot-spot' areas. These areas have a potential to generate highly BTEX polluted stormwater runoff and hence be inappropriate to be reused. These research outcomes are expected to provide an effective approach for ensuring stormwater reuse safety and a useful guidance for decision-making for stormwater management and water environment protection related urban planning.
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Affiliation(s)
- Nian Hong
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060 Shenzhen, China
| | - An Liu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060 Shenzhen, China; Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Australia.
| | - Panfeng Zhu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China
| | - Xu Zhao
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Yuntao Guan
- Research Center of Environmental Engineering and Management, Graduate School at Shenzhen, Tsinghua University, 518055 Shenzhen, China
| | - Mengting Yang
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060 Shenzhen, China
| | - Hongyang Wang
- State Key Laboratory of Environmental Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012, China
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15
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Aazza M, Ahlafi H, Moussout H, Maghat H. Adsorption of metha-nitrophenol onto alumina and HDTMA modified alumina: Kinetic, isotherm and mechanism investigations. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.07.095] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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16
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Hong N, Zhu P, Liu A. Modelling heavy metals build-up on urban road surfaces for effective stormwater reuse strategy implementation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2017; 231:821-828. [PMID: 28866423 DOI: 10.1016/j.envpol.2017.08.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/11/2017] [Accepted: 08/14/2017] [Indexed: 06/07/2023]
Abstract
Urban road stormwater is an alternative water resource to mitigate water shortage issues in the worldwide. Heavy metals deposited (build-up) on urban road surface can enter road stormwater runoff, undermining stormwater reuse safety. As heavy metal build-up loads perform high variabilities in terms of spatial distribution and is strongly influenced by surrounding land uses, it is essential to develop an approach to identify hot-spots where stormwater runoff could include high heavy metal concentrations and hence cannot be reused if it is not properly treated. This study developed a robust modelling approach to estimating heavy metal build-up loads on urban roads using land use fractions (representing percentages of land uses within a given area) by an artificial neural network (ANN) model technique. Based on the modelling results, a series of heavy metal load spatial distribution maps and a comprehensive ecological risk map were generated. These maps provided a visualization platform to identify priority areas where the stormwater can be safely reused. Additionally, these maps can be utilized as an urban land use planning tool in the context of effective stormwater reuse strategy implementation.
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Affiliation(s)
- Nian Hong
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060 Shenzhen, China
| | - Panfeng Zhu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China
| | - An Liu
- College of Chemistry and Environmental Engineering, Shenzhen University, 518060 Shenzhen, China; Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, 518060 Shenzhen, China; Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Australia.
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17
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Gajdár J, Barek J, Fojta M, Fischer J. Micro volume voltammetric determination of 4-nitrophenol in dimethyl sulfoxide at a glassy carbon electrode. MONATSHEFTE FUR CHEMIE 2017. [DOI: 10.1007/s00706-017-1954-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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18
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Simultaneous spectrophotometric determination of iron species using orthogonal signal correction–generalized partial least squares calibration method after vortex-assisted dispersive liquid–liquid microextraction. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-1037-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Waris M, Baig JA, Sirajuddin, Kazi TG, Solangi IB, Siddiqui S, Afridi HI. Selective Electroanalytical Method for the Determination of Roxarsone in Poultry Feed and Litter. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-015-0385-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Daneshmehr MA, Ahmadi F, Ahmadi B, Shakiba E. Deciphering the binding mode of dinitramine herbicide to ct-DNA, a thermodynamic discussion. FOOD AGR IMMUNOL 2015. [DOI: 10.1080/09540105.2015.1055555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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21
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Wei T, Huang X, Zeng Q, Wang L. Simultaneous electrochemical determination of nitrophenol isomers with the polyfurfural film modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.02.031] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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22
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Luo J, Cong J, Liu J, Gao Y, Liu X. A facile approach for synthesizing molecularly imprinted graphene for ultrasensitive and selective electrochemical detecting 4-nitrophenol. Anal Chim Acta 2015; 864:74-84. [DOI: 10.1016/j.aca.2015.01.037] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/24/2015] [Accepted: 01/28/2015] [Indexed: 11/29/2022]
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23
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Chen K, Xu M, Ren Y, Song G, Hu Y, Cheng H, Shang C. Preparation of Magnetic Graphene Nanocomposites for Fast Detection of Nitrobenzene in Environmental Water Samples by GC–MS. Chromatographia 2014. [DOI: 10.1007/s10337-014-2815-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Hasani M, Shariati-Rad M, Bidad E. Simultaneous determination of mixtures of nitrophenols using multivariate curve resolution-alternating least squares. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2014. [DOI: 10.1007/s13738-013-0382-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Graphene quantum dots and the resonance light scattering technique for trace analysis of phenol in different water samples. Talanta 2014; 125:341-6. [DOI: 10.1016/j.talanta.2014.03.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 02/26/2014] [Accepted: 03/10/2014] [Indexed: 11/18/2022]
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26
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Parham H, Saeed S. Pre-concentration and determination of traces of nitrobenzene and 1,3-dinitrobenzene in water samples using anthracite adsorbent. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.06.035] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Lezi N, Economou A, Barek J, Prodromidis M. Screen-Printed Disposable Sensors Modified with Bismuth Precursors for Rapid Voltammetric Determination of 3 Ecotoxic Nitrophenols. ELECTROANAL 2014. [DOI: 10.1002/elan.201400001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Gunawardena J, Ziyath AM, Egodawatta P, Ayoko GA, Goonetilleke A. Mathematical relationships for metal build-up on urban road surfaces based on traffic and land use characteristics. CHEMOSPHERE 2014; 99:267-71. [PMID: 24268173 DOI: 10.1016/j.chemosphere.2013.10.068] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 10/12/2013] [Accepted: 10/18/2013] [Indexed: 05/05/2023]
Abstract
The study investigated the influence of traffic and land use parameters on metal build-up on urban road surfaces. Mathematical relationships were developed to predict metals originating from fuel combustion and vehicle wear. The analysis undertaken found that nickel and chromium originate from exhaust emissions, lead, copper and zinc from vehicle wear, cadmium from both exhaust and wear and manganese from geogenic sources. Land use does not demonstrate a clear pattern in relation to the metal build-up process, though its inherent characteristics such as traffic activities exert influence. The equation derived for fuel related metal load has high cross-validated coefficient of determination (Q(2)) and low Standard Error of Cross-Validation (SECV) values which indicates that the model is reliable, while the equation derived for wear-related metal load has low Q(2) and high SECV values suggesting its use only in preliminary investigations. Relative Prediction Error values for both equations are considered to be well within the error limits for a complex system such as an urban road surface. These equations will be beneficial for developing reliable stormwater treatment strategies in urban areas which specifically focus on mitigation of metal pollution.
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Affiliation(s)
- Janaka Gunawardena
- Toowoomba Regional Council, PO Box 3021, Toowoomba Village Fair, QLD 4350, Australia; Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
| | - Abdul M Ziyath
- Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia; Department of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Sri Lanka.
| | - Prasanna Egodawatta
- Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
| | - Godwin A Ayoko
- Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
| | - Ashantha Goonetilleke
- Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
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Lourenço AS, Sanches FA, Magalhães RR, Costa DJ, Ribeiro WF, Bichinho KM, Salazar-Banda GR, Araújo MC. Electrochemical oxidation and electroanalytical determination of xylitol at a boron-doped diamond electrode. Talanta 2014; 119:509-16. [DOI: 10.1016/j.talanta.2013.11.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 11/06/2013] [Accepted: 11/08/2013] [Indexed: 10/26/2022]
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30
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Rahman MM, Khan SB, Asiri AM, Al-Sehemi AG. Chemical sensor development based on polycrystalline gold electrode embedded low-dimensional Ag2O nanoparticles. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.08.164] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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31
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Tahmasebi E, Yamini Y, Seidi S, Rezazadeh M. Extraction of three nitrophenols using polypyrrole-coated magnetic nanoparticles based on anion exchange process. J Chromatogr A 2013; 1314:15-23. [PMID: 24054421 DOI: 10.1016/j.chroma.2013.09.012] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 09/03/2013] [Accepted: 09/04/2013] [Indexed: 01/11/2023]
Abstract
In this research, the applicability of polypyrrole-coated Fe3O4 nanoparticles (Fe3O4@PPy NPs) as an anion exchange magnetic nanosorbent is demonstrated. For this purpose, three nitrophenols were selected as models which are acidic compounds with low logP values and their extraction in neutral form (only based on hydrophobic interactions) is difficult. The extracted nitrophenols were separated and determined by high-performance liquid chromatography-UV detection. The size, morphology and surface coating of synthesized Fe3O4@PPy NPs have been characterized via different techniques such as Fourier transform infrared spectroscopy, transmission electron microscopy, scanning electron microscopy and thermo-gravimetric analysis. The important parameters influencing the extraction efficiency were studied and optimized. Under the optimum extraction conditions (300mL sample solution with pH 10, extraction and desorption times of 10 and 2min, respectively, 500μL of 0.1M HNO3 in acetonitrile as eluent, and 40mg of adsorbent), a linear range between 0.75 and 100μgL(-1) (R(2)>0.997), and limits of detection ranging from 0.3 to 0.4μgL(-1) were obtained. Preconcentration factors in the range of 125-180 were achieved and relative standard deviations (RSDs%) were less than 4.9 (n=4) for the three nitrophenols. The analytical method was successfully applied for environmental water samples such as tap water, rain water and river water. The recoveries varied within the range of 84-109% confirming good performance of the method in various waters samples. The results showed that the proposed method is a rapid, convenient and feasible technique for determination of nitrophenols in aqueous samples.
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Affiliation(s)
- Elham Tahmasebi
- Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-175, Tehran, Iran
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Egodawatta P, Ziyath AM, Goonetilleke A. Characterising metal build-up on urban road surfaces. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 176:87-91. [PMID: 23416742 DOI: 10.1016/j.envpol.2013.01.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2012] [Revised: 01/10/2013] [Accepted: 01/18/2013] [Indexed: 06/01/2023]
Abstract
Reliable approaches for predicting pollutant build-up are essential for accurate urban stormwater quality modelling. Based on the in-depth investigation of metal build-up on residential road surfaces, this paper presents empirical models for predicting metal loads on these surfaces. The study investigated metals commonly present in the urban environment. Analysis undertaken found that the build-up process for metals primarily originating from anthropogenic (copper and zinc) and geogenic (aluminium, calcium, iron and manganese) sources were different. Chromium and nickel were below detection limits. Lead was primarily associated with geogenic sources, but also exhibited a significant relationship with anthropogenic sources. The empirical prediction models developed were validated using an independent data set and found to have relative prediction errors of 12-50%, which is generally acceptable for complex systems such as urban road surfaces. Also, the predicted values were very close to the observed values and well within 95% prediction interval.
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Affiliation(s)
- Prasanna Egodawatta
- Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane QLD 4000, Australia
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33
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Rahman MM, Gruner G, Al-Ghamdi MS, Daous MA, Khan SB, Asiri AM. Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes. Chem Cent J 2013; 7:60. [PMID: 23537000 PMCID: PMC3630067 DOI: 10.1186/1752-153x-7-60] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 03/19/2013] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Semiconductor doped nanostructure materials have attained considerable attention owing to their electronic, opto-electronic, para-magnetic, photo-catalysis, electro-chemical, mechanical behaviors and their potential applications in different research areas. Doped nanomaterials might be a promising owing to their high-specific surface-area, low-resistances, high-catalytic activity, attractive electro-chemical and optical properties. Nanomaterials are also scientifically significant transition metal-doped nanostructure materials owing to their extraordinary mechanical, optical, electrical, electronic, thermal, and magnetic characteristics. Recently, it has gained significant interest in manganese oxide doped-semiconductor materials in order to develop their physico-chemical behaviors and extend their efficient applications. It has not only investigated the basic of magnetism, but also has huge potential in scientific features such as magnetic materials, bio- & chemi-sensors, photo-catalysts, and absorbent nanomaterials. RESULTS The chemical sensor also displays the higher-sensitivity, reproducibility, long-term stability, and enhanced electrochemical responses. The calibration plot is linear (r2 = 0.977) over the 0.1 nM to 50.0 μM 4-nitrophenol concentration ranges. The sensitivity and detection limit is ~4.6667 μA cm-2 μM-1 and ~0.83 ± 0.2 nM (at a Signal-to-Noise-Ratio, SNR of 3) respectively. To best of our knowledge, this is the first report for detection of 4-nitrophenol chemical with doped Mn2O3-ZnO NPs using easy and reliable I-V technique in short response time. CONCLUSIONS As for the doped nanostructures, NPs are introduced a route to a new generation of toxic chemo-sensors, but a premeditate effort has to be applied for doped Mn2O3-ZnO NPs to be taken comprehensively for large-scale applications, and to achieve higher-potential density with accessible to individual chemo-sensors. In this report, it is also discussed the prospective utilization of Mn2O3-ZnO NPs on the basis of carcinogenic chemical sensing, which could also be applied for the detection of hazardous chemicals in ecological, environmental, and health care fields.
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Affiliation(s)
- Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P,O, Box 80203, Jeddah, 21589, Saudi Arabia.
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Simultaneous identification and quantification of nitro-containing explosives by advanced chemometric data treatment of cyclic voltammetry at screen-printed electrodes. Talanta 2013; 107:270-6. [PMID: 23598222 DOI: 10.1016/j.talanta.2012.12.042] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 12/17/2012] [Accepted: 12/26/2012] [Indexed: 11/22/2022]
Abstract
The simultaneous determination of three nitro-containing compounds found in the majority of explosive mixtures, namely hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX), 2,4,6-trinitrotoluene (TNT) and pentaerythritol tetranitrate (PETN), is demonstrated using both qualitative and quantitative approaches involving the coupling of electrochemical measurements and advanced chemometric data processing. Voltammetric responses were obtained from a single bare screen-printed carbon electrode (SPCE), which exhibited marked mix-responses towards the compounds examined. The responses obtained were then preprocessed employing discrete wavelet transform (DWT) and the resulting coefficients were input to an artificial neural network (ANN) model. Subsequently, meaningful data was extracted from the complex voltammetric readings, achieving either the correct discrimination of the different commercial mixtures (100% of accuracy, sensitivity and specificity) or the individual quantification of each of the compounds under study (total NRMSE of 0.162 for the external test subset).
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35
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Junqueira JR, de Araujo WR, Salles MO, Paixão TR. Flow injection analysis of picric acid explosive using a copper electrode as electrochemical detector. Talanta 2013; 104:162-8. [DOI: 10.1016/j.talanta.2012.11.036] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 11/14/2012] [Accepted: 11/16/2012] [Indexed: 10/27/2022]
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Mahbub P, Goonetilleke A, Ayoko GA. Prediction of the wash-off of traffic related semi- and non-volatile organic compounds from urban roads under climate change influenced rainfall characteristics. JOURNAL OF HAZARDOUS MATERIALS 2012; 213-214:83-92. [PMID: 22326825 DOI: 10.1016/j.jhazmat.2012.01.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Revised: 01/17/2012] [Accepted: 01/19/2012] [Indexed: 05/31/2023]
Abstract
Traffic generated semi- and non-volatile organic compounds (SVOCs and NVOCs) pose a serious threat to human and ecosystem health when washed off into receiving water bodies by stormwater. Climate change influenced rainfall characteristics makes the estimation of these pollutants in stormwater quite complex. The research study discussed in the paper developed a prediction framework for such pollutants under the dynamic influence of climate change on rainfall characteristics. It was established through principal component analysis (PCA) that the intensity and durations of low to moderate rain events induced by climate change mainly affect the wash-off of SVOCs and NVOCs from urban roads. The study outcomes were able to overcome the limitations of stringent laboratory preparation of calibration matrices by extracting uncorrelated underlying factors in the data matrices through systematic application of PCA and factor analysis (FA). Based on the initial findings from PCA and FA, the framework incorporated orthogonal rotatable central composite experimental design to set up calibration matrices and partial least square regression to identify significant variables in predicting the target SVOCs and NVOCs in four particulate fractions ranging from >300 to 1 μm and one dissolved fraction of <1 μm. For the particulate fractions in >300-1 μm range, similar distributions of predicted and observed concentrations of the target compounds from minimum to 75th percentile were achieved. The inter-event coefficient of variations for particulate fractions of >300-1 μm was 5-25%. The limited solubility of the target compounds in stormwater restricted the predictive capacity of the proposed method for the dissolved fraction of <1 μm.
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Affiliation(s)
- Parvez Mahbub
- School of Urban Development, Queensland University of Technology, GPO Box 2434, Brisbane 4001, Queensland, Australia.
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37
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Kokkinos C, Economou A, Raptis I. Microfabricated disposable lab-on-a-chip sensors with integrated bismuth microelectrode arrays for voltammetric determination of trace metals. Anal Chim Acta 2012; 710:1-8. [DOI: 10.1016/j.aca.2011.10.048] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Accepted: 10/24/2011] [Indexed: 10/15/2022]
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38
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Asadpour-Zeynali K, Soheili-Azad P. Simultaneous polarographic determination of 2-nitrophenol and 4-nitrophenol by differential pulse polarography method and support vector regression. ENVIRONMENTAL MONITORING AND ASSESSMENT 2012; 184:1089-1096. [PMID: 21484298 DOI: 10.1007/s10661-011-2023-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Accepted: 03/16/2011] [Indexed: 05/30/2023]
Abstract
A differential pulse polarography (DPP) for the simultaneous determination of 2-nitrophenol and 4-nitrophenol was proposed. It was found that under optimum experimental conditions (pH = 5, scan rate = 5 mV/s, pulse amplitude = -50 mV), 2-nitrophenol and 4-nitrophenol had well-defined polarographic reduction waves with peak potentials at -317 and -406 mV, respectively. In the mixture of two compounds overlapping polarographic peaks were observed. In this study, support vector regression (SVR) was applied to resolve the overlapped polarograms. Furthermore, a comparison was made between the performance of SVR and partial least square (PLS) on data set. The results demonstrated that SVR is a better well-performing alternative for the analysis and modeling of DPP data than the commonly applied PLS technique. The proposed method was used for the determination of 2-nitrophenol and 4-nitrophenol in industrial waste water.
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Affiliation(s)
- Karim Asadpour-Zeynali
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51666 16471, Iran.
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39
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Shi Q, Diao G. The electrocatalytical reduction of m-nitrophenol on palladium nanoparticles modified glassy carbon electrodes. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.09.064] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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40
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Rounaghi G, Mohammad Zadeh Kakhki R, Heidari T. Artificial Neural Networks Applied for Simultaneous Analysis of Mixtures of Nitrophenols by Conductometric Acid–Base Titration. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200900z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gholamhossein Rounaghi
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
| | | | - Tahereh Heidari
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
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41
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Asadpour-Zeynali K, Najafi-Marandi P. Bismuth Modified Disposable Pencil-Lead Electrode for Simultaneous Determination of 2-Nitrophenol and 4-Nitrophenol by Net Analyte Signal Standard Addition Method. ELECTROANAL 2011. [DOI: 10.1002/elan.201100103] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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42
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Mahbub P, Goonetilleke A, Ayoko GA. Prediction model of the buildup of volatile organic compounds on urban roads. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:4453-4459. [PMID: 21513297 DOI: 10.1021/es200307x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A model to predict the buildup of mainly traffic-generated volatile organic compounds or VOCs (toluene, ethylbenzene, ortho-xylene, meta-xylene, and para-xylene) on urban road surfaces is presented. The model required three traffic parameters, namely average daily traffic (ADT), volume to capacity ratio (V/C), and surface texture depth (STD), and two chemical parameters, namely total suspended solid (TSS) and total organic carbon (TOC), as predictor variables. Principal component analysis and two phase factor analysis were performed to characterize the model calibration parameters. Traffic congestion was found to be the underlying cause of traffic-related VOC buildup on urban roads. The model calibration was optimized using orthogonal experimental design. Partial least squares regression was used for model prediction. It was found that a better optimized orthogonal design could be achieved by including the latent factors of the data matrix into the design. The model performed fairly accurately for three different land uses as well as five different particle size fractions. The relative prediction errors were 10-40% for the different size fractions and 28-40% for the different land uses while the coefficients of variation of the predicted intersite VOC concentrations were in the range of 25-45% for the different size fractions. Considering the sizes of the data matrices, these coefficients of variation were within the acceptable interlaboratory range for analytes at ppb concentration levels.
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Affiliation(s)
- Parvez Mahbub
- School of Urban Development, Queensland University of Technology, GPO Box 2434, Brisbane 4001, Queensland, Australia.
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43
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Kokkinos C, Economou A, Raptis I, Speliotis T. Disposable lithographically fabricated bismuth microelectrode arrays for stripping voltammetric detection of trace metals. Electrochem commun 2011. [DOI: 10.1016/j.elecom.2011.01.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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44
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Electrochemical simultaneous determination of nitrophenol isomers at nano-gold modified glassy carbon electrode. J APPL ELECTROCHEM 2011. [DOI: 10.1007/s10800-011-0281-4] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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45
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Wang XG, Fan YJ, Hao ZX, Gan LH. Voltammetric determination of 2,4-dinitrophenol and 2,5-dinitrophenol using a poly-aspartic acid modified electrode1. RUSS J ELECTROCHEM+ 2011. [DOI: 10.1134/s1023193510120104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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46
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Santos MSD, Bianchin JN, Spinelli A. Desenvolvimento de metodologia analítica baseada em eletrodo de carbono vítreo modificado com filme de bismuto: aplicação em águas de chuva de regiões de Santa Catarina. ECLÉTICA QUÍMICA 2011. [DOI: 10.1590/s0100-46702011000200009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Neste estudo foi desenvolvida uma metodologia analítica para determinação de 2,4-dinitrofenol (2,4-DNP) em amostras de águas de chuva de regiões de Santa Catarina utilizando a voltametria de onda quadrada (VOQ) e de forma ex situ. O estudo envolveu a aplicabilidade de utilizar o eletrodo de carbono vítreo modificado com filme de bismuto. A formação do filme de bismuto foi otimizada por voltametria cíclica e em seguida, estudos de pH e eletrólito de suporte foram investigados para a redução do 2,4-DNP. Os parâmetros analíticos que afetam a sensibilidade da VOQ foram otimizados. Na sequência, as figuras analíticas de mérito foram obtidas: faixa linear de trabalho de 3,2 x 10-7 - 4,6 x 10-6 mol L-1, coeficiente de correlação de 0,996, RSD% = 17,5 (1,3 x 10-6 mol L-1, n = 6), 11,7 (2,5 x 10-6 mol L-1, n = 6) e 6,4 ( 4,5 x 10-6 mol L-1, n = 6), limite de detecção de 1,2 x 10-7 mol L-1. E, finalmente estudos de recuperação foram realizados para avaliar a exatidão da metodologia. Valores obtidos ficaram entre 84-112% (2,5 x 10-6 mol L-1) e 89 - 113% (4,5 x 10-6 mol L-1).
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Electrochemical oxidation behavior of 2,4-dinitrophenol at hydroxylapatite film-modified glassy carbon electrode and its determination in water samples. J Solid State Electrochem 2010. [DOI: 10.1007/s10008-010-1280-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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48
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Differential pulse voltammetry in analysis of disinfectants — 2-mercaptobenzothiazole, 4-chloro-3-methylphenol, triclosan, chloramine-T. OPEN CHEM 2010. [DOI: 10.2478/s11532-010-0111-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
AbstractThe aim of this work was to study the possibility of simultaneous voltammetric determination of some disinfectants used as components in cosmetic products. The examined compounds were: triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol), chloramine-T (N-chloro-p-toluenesulfonamide sodium salt), 4-chloro-3-methylphenol and 2-mercaptobenzothiazole. Measurements were performed using glassy carbon electrode immersed in Britton-Robinson buffers which acted as supporting electrolytes. The dependence of oxidation and reduction potentials on pH was examined using cyclic voltammetry. Britton-Robinson buffer of pH 9.9 was chosen for further studies to ensure the best separation of compounds. The resultant oxidation potentials indicate the possibility to simultaneously determine some of the disinfectants.. Oxidation reactions of mixtures containing two compounds (4-chloro-3-methylphenol and chloramine-T, 2-mercaptobenzothiazole and 4-chloro-3-methylphenol, 2-mercaptobenzothiazole and triclosan) were recorded as differential pulse voltammograms.
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Gu YE, Zhang Y, Zhang F, Wei J, Wang C, Du Y, Ye W. Investigation of photoelectrocatalytic activity of Cu2O nanoparticles for p-nitrophenol using rotating ring-disk electrode and application for electrocatalytic determination. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.09.051] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Ganranoo L, Mishra SK, Azad AK, Shigihara A, Dasgupta PK, Breitbach ZS, Armstrong DW, Grudpan K, Rappenglueck B. Measurement of nitrophenols in rain and air by two-dimensional liquid chromatography-chemically active liquid core waveguide spectrometry. Anal Chem 2010; 82:5838-43. [PMID: 20518471 DOI: 10.1021/ac101015y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a novel system to analyze atmospheric nitrophenols (NPs). Rain or air sample extracts (1 mL) are preconcentrated on a narrow bore (2 mm) aliphatic anion exchanger. In the absence of strong retention of NPs exhibited by aromatic ion exchangers, retained NPs are eluted as a plug by injection of 100 microL of 0.1 M Na(2)SO(4) on to a short (2 x 50 mm) reverse phase C-18 column packed with 2.2 mum particles. The salt plug passes through the C-18 column unretained while the NPs are separated by an ammonium acetate buffered methanol-water eluent, compatible with mass spectrometry (MS). The eluted NPs are measured with a long path Teflon AF-based liquid core waveguide (0.15 x 1420 mm) illuminated by a 403 nm light emitting diode and detected by a monolithic photodiode-operational amplifier. The waveguide is rendered chemically active by suspending it over concentrated ammonia that permeates into the lumen. The NPs ionize to the yellow anion form (lambda(max) approximately 400 nm). The separation of 4-nitrophenol, 2,4-dinitrophenol, 2-methyl-4-nitrophenol, 3-methyl-4-nitrophenol, and 2-nitrophenol (these are the dominant NPs, typically in that order, in both rain and air of Houston and Arlington, TX, confirmed by tandem MS) takes just over 5 min with respective S/N = 3 limits of detection (LODs) of 60, 12, 30, 67, and 23 pg/mL compared to MS/MS LODs of 20, 49, 11, 20, and 210 pg/mL. Illustrative air and rain data are presented.
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Affiliation(s)
- Lucksagoon Ganranoo
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, USA
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