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Rasouli Z, Ghavami R. Enhanced Sensitivity to Detection Nanomolar Level of Cu 2+ Compared to Spectrophotometry Method by Functionalized Gold Nanoparticles: Design of Sensor Assisted by Exploiting First-order Data with Chemometrics. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:336-344. [PMID: 29055278 DOI: 10.1016/j.saa.2017.10.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 09/24/2017] [Accepted: 10/09/2017] [Indexed: 06/07/2023]
Abstract
A simple, sensitive and efficient colorimetric assay platform for the determination of Cu2+ was proposed with the aim of developing sensitive detection based on the aggregation of AuNPs in presence of a histamine H2-receptor antagonist (famotidine, FAM) as recognition site. This study is the first to demonstrate that the molar extinction coefficients of the complexes formed by FAM and Cu2+ are very low (by analyzing the chemometrics methods on the first order data arising from different metal to ligand ratio method), leading to the undesirable sensitivity of FAM-based assays. To resolve the problem of low sensitivity, the colorimetry method based on the Cu2+-induced aggregation of AuNPs functionalized with FAM was introduced. This procedure is accompanied by a color change from bright red to blue which can be observed with the naked eyes. Detection sensitivity obtained by the developed method increased about 100 fold compared with the spectrophotometry method. This sensor exhibited a good linear relation between the absorbance ratios at 670 to 520nm (A670/520) and the concentration in the range 2-110nM with LOD=0.76nM. The satisfactory analytical performance of the proposed sensor facilitates the development of simple and affordable UV-Vis chemosensors for environmental applications.
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Affiliation(s)
- Zolaikha Rasouli
- Department of Chemistry, Faculty of Science, University of Kurdistan, P. O. Box 416, Sanandaj, Iran
| | - Raouf Ghavami
- Department of Chemistry, Faculty of Science, University of Kurdistan, P. O. Box 416, Sanandaj, Iran.
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Zhao C, Wang CC, Li JQ, Wang P, Ou JQ, Cui JR. Interactions between copper(II) and DOM in the urban stormwater runoff: modeling and characterizations. ENVIRONMENTAL TECHNOLOGY 2018; 39:120-129. [PMID: 28264625 DOI: 10.1080/09593330.2017.1296893] [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: 07/28/2016] [Accepted: 02/14/2017] [Indexed: 06/06/2023]
Abstract
Dissolved organic matter (DOM) can strongly interact with both organic and inorganic contaminants to influence their transportation, transformation, bioavailability, toxicity and even their ultimate fate. Within this work, DOM was extracted from urban stormwater runoff samples collected from a regular sampling site of a typical residential area in Beijing, China. Copper(II) ions were selected as model to investigate the interactions between DOM and typical heavy metals. Both ultraviolet (UV) absorbance and fluorescence titration methods were introduced to determine the complex capacities (CL) and conditional stability constants (log KM) of bonding between DOM and copper (II) ions, which revealed that the values of CL were 85.62 and 87.23 μmol mg-1 and the log KM values were 5.37 and 5.48, respectively. The results suggested the successful complexation between DOM and copper(II) ions. Furthermore, morphology of the DOM binding to copper(II) ions was confirmed by both energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS), which can facilitate to clarify the corresponding mechanism. The Cu 2p3/2 peak at 933.7 eV and the characteristic shake-up peaks of Cu-O were found in the XPS spectra, implying that copper(II) ions might coordinate with hydroxyl (aliphatic or phenolic) or carboxyl groups. With these profitable results, it can be concluded that DOM in urban stormwater runoff has a strong binding affinity with copper(II) ions, which may further lead to potentially significant influence on their migration and transformation.
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Affiliation(s)
- Chen Zhao
- a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
| | - Chong-Chen Wang
- a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
| | - Jun-Qi Li
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
| | - Peng Wang
- a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
| | - Jia-Qi Ou
- a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
| | - Jing-Rui Cui
- a Beijing Key Laboratory of Functional Materials for Building Structure and Environment , Remediation Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
- b Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education) , Beijing University of Civil Engineering and Architecture , Beijing , People's Republic of China
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Turpin-Nagel K, Vadas TM. Controls on metal exposure to aquatic organisms in urban streams. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2016; 18:956-967. [PMID: 27170052 DOI: 10.1039/c6em00151c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Streams in urban ecosystems receive metal inputs primarily from stormwater runoff and wastewater effluent. The relative contribution of these metal sources to stream impairment is difficult to discern based on simple water characteristics and biological surveys. Stream impairment in these systems is often indicated by reduced abundance and diversity of aquatic insects, which tend to be more sensitive to chronic metal exposures. Metal species and controls on metal species in both the waterborne and dietborne exposure pathways to aquatic organisms are reviewed here. In addition, ecological changes that can control dietborne species are discussed. A main focus is on how organic matter from different anthropogenic sources may control both aqueous metal speciation as well as interaction with various inorganic or microbiological surfaces in streams. Most of the reviewed research focuses on Cu, Zn or Pb as those are the primary metals of concern in developed systems and Cu and Pb have unique and strong interactions with organic matter. Recommendations for further research are described in the context of exposure species, dynamics of exposure, stoichiometry, or advanced analytical tools, and regulatory implications are discussed.
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Affiliation(s)
- Katelyn Turpin-Nagel
- Department of Civil and Environmental Engineering, University of Connecticut, 261 Glenbrook Rd. Unit 3037, Storrs, CT 06269, USA.
| | - Timothy M Vadas
- Department of Civil and Environmental Engineering, University of Connecticut, 261 Glenbrook Rd. Unit 3037, Storrs, CT 06269, USA. and Center for Environmental Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
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Akhond M, Absalan G, Pourshamsi T, Ramezani AM. Gas-assisted dispersive liquid-phase microextraction using ionic liquid as extracting solvent for spectrophotometric speciation of copper. Talanta 2016; 154:461-6. [DOI: 10.1016/j.talanta.2016.04.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 03/29/2016] [Accepted: 04/01/2016] [Indexed: 11/29/2022]
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Pearson HB, Galceran J, Companys E, Braungardt C, Worsfold P, Puy J, Comber S. Absence of Gradients and Nernstian Equilibrium Stripping (AGNES) for the determination of [Zn2+] in estuarine waters. Anal Chim Acta 2016; 912:32-40. [DOI: 10.1016/j.aca.2016.01.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/13/2016] [Accepted: 01/19/2016] [Indexed: 10/22/2022]
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