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Ozer T, Agir I, Borch T. Water monitoring with an automated smart sensor supported with solar power for real-time and long range detection of ferrous iron. Analyst 2024; 149:2671-2679. [PMID: 38411256 DOI: 10.1039/d4an00055b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Low-power and smart sensing systems for iron detection are necessary for in situ monitoring of water quality. Here, a potentiometric Fe2+-selective electrode (ISE) was fabricated based on cyanomethyl N-methyl-N-phenyl dithiocarbamate for the first time as an ionophore. Under optimal conditions, the ISE showed a Nernstian slope of 29.76 ± 0.6 mV per decade for Fe2+ ions over a wide concentration range from 1.0 × 10-1 to 1.0 × 10-5 M with a lower detection limit (LOD) of 1.0 × 10-6 M. The ISE interference of various cations on the potentiometric response was also investigated. The ISE had a response time less than 3 s and the lifetime was two months. Also, an automated, long-range (LoRa), wireless enabled sampling microfluidic device powered with a solar panel as an autonomous power source was developed for a continuous sampling and sensing process. The sensing platform was employed in the determination of Fe2+ in acid mine drainage and spiked water samples with an average recovery of 100.7%. This simple, inexpensive (below $350), portable sensing platform will allow for rapid real-time monitoring of ground-, drinking-, and industrial waters contaminated with iron.
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Affiliation(s)
- Tugba Ozer
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34220 Istanbul, Türkiye.
- Department of Chemistry, Colorado State University, 1170 Campus Delivery, Fort Collins, CO 80523, USA.
- Department of Soil and Crop Sciences, 1170 Campus Delivery, Fort Collins, CO 80523, USA
- Health Biotechnology Joint Research and Application Center of Excellence, 34220 Esenler, Istanbul, Türkiye
| | - Ismail Agir
- Department of Bioengineering, Istanbul Medeniyet University, Faculty of Engineering and Natural Sciences, 34700 Istanbul, Türkiye
| | - Thomas Borch
- Department of Chemistry, Colorado State University, 1170 Campus Delivery, Fort Collins, CO 80523, USA.
- Department of Soil and Crop Sciences, 1170 Campus Delivery, Fort Collins, CO 80523, USA
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Saijo Y, Murata M, Kajihara T, Hijiya H, Suzuki Y, Akiyama R, Shimizu M, Shimotsuma Y, Miura K. Speciation of tin ions in oxide glass containing iron oxide through solvent extraction and inductively coupled plasma atomic emission spectrometry after the decomposition utilizing ascorbic acid. ANAL SCI 2022; 38:881-888. [PMID: 35391599 DOI: 10.1007/s44211-022-00110-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/11/2022] [Indexed: 11/01/2022]
Abstract
Determining the concentrations of different Sn ions in glass containing iron oxide by wet chemical analysis is a challenge because a redox reaction occurs between Sn2+ and Fe3+. A chemical analysis method for determining the concentrations of Sn2+ and Sn4+ in soda lime glass containing iron oxide was proposed. A mixture of ascorbic acid, hydrochloric acid, and hydrofluoric acid was used to decompose the sample in a vessel with nitrogen flow. Ascorbic acid functioned as a reductant for Fe3+. Subsequently, the Sn2+ were separated as a diethyldithiocarbamate complex. Furthermore, inductively coupled plasma atomic emission spectroscopy was used to determine the concentrations of Sn4+ and total Sn, from which the concentration of Sn2+ can be calculated. The results were validated by comparing ratios of Sn2+ to total Sn to results obtained using Mössbauer spectroscopy. The results were in agreement, thereby validating the use of the proposed approach.
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Affiliation(s)
- Yoshitaka Saijo
- Innovative Technology Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan. .,Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan.
| | - Makiko Murata
- Innovative Technology Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Takato Kajihara
- Materials Integration Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Hiroyuki Hijiya
- Materials Integration Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Yuichi Suzuki
- Innovative Technology Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Ryoji Akiyama
- Innovative Technology Laboratories, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Masahiro Shimizu
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Yasuhiko Shimotsuma
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
| | - Kiyotaka Miura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto, 615-8510, Japan
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On-line spectrophotometric determination of ferrous and total iron in monominerals by flow injection combined with a Schlenk line-based digestion apparatus to exclude oxygen. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104743] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Shah SNA, Dou X, Khan M, Uchiyama K, Lin JM. N-doped carbon dots/H 2O 2 chemiluminescence system for selective detection of Fe 2+ ion in environmental samples. Talanta 2018; 196:370-375. [PMID: 30683378 DOI: 10.1016/j.talanta.2018.12.091] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/30/2018] [Accepted: 12/25/2018] [Indexed: 12/24/2022]
Abstract
The nitrogen doped carbon dots (N-CDs) produces strong chemiluminescence (CL)-emission due to hydroxyl radical (•OH) induced electron-hole transition in N-CDs. The Fe2+ has the ability to generate •OH from available hydrogen peroxide (H2O2). Therefore, a pre-mixed N-CDs/H2O2 solution was utilized for selective quantification of Fe2+ in solution via CL-emission. A linear increase in the CL-emission intensity was observed within increase in Fe2+ concentration. The N-CDs/H2O2 system enabled the detection of Fe2+ up to lower concentration of 0.2 × 10-9 M with a linear dynamic range of 1.0 × 10-9-1.0 × 10-6 M. Significantly, no CL-emission was observed when other divalent cations, Al3+, Fe3+, or Cr3+ were injected to this system. Moreover, no interference was observed when a mixed solution of Fe2+ and other cations were introduced to N-CDs/H2O2. The practical evaluation of N-CDs/H2O2 system was demonstrated for detection of Fe2+ in tap, lotus pond, and canal water samples. The easy detection, high sensitivity, and selectivity make this method a significant tool for analysis of Fe2+ in solution.
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Affiliation(s)
- Syed Niaz Ali Shah
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Xiangnan Dou
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China; Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Mashooq Khan
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Katsumi Uchiyama
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, China.
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Jaikrajang N, Kruanetr S, Harding DJ, Rattanakit P. A simple flow injection spectrophotometric procedure for iron(III) determination using Phyllanthus emblica Linn. as a natural reagent. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:726-734. [PMID: 29986319 DOI: 10.1016/j.saa.2018.06.109] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 06/28/2018] [Accepted: 06/30/2018] [Indexed: 06/08/2023]
Abstract
The use of natural reagents from plant extracts for chemical analysis is one approach in the development of green analytical chemistry methodology. In this work, a natural reagent extracted from Phyllanthus emblica Linn. has been applied for the determination of iron(III) using a simple flow injection spectrophotometric method. The method was based on the measurement of a dark-purple complex formed by the reaction between iron(III) and the extracted solution in an acetate buffer (pH 5.6) at 570 nm. Under the optimum conditions, a linear calibration graph in the range of 0.50-20.0 mg L-1 iron(III) was obtained with a correlation coefficient (r2) of 0.9996. The limit of detection and limit of quantification were 0.31 and 0.50 mg L-1, respectively. The relative standard deviation was less than 2.50%. The proposed method was successfully applied for quantitative analysis of iron(III) in pharmaceutical preparations and water samples with a sampling rate of 90 samples h-1. The results are in good agreement with those obtained by the official ICP-OES technique at the 95% confidence level. The presented method provides a simple, cost-effective and environmentally friendly approach which is suitable and useful for determining iron(III). Therefore, it can be considered as an alternative analytical technique in green chemistry.
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Affiliation(s)
- Natta Jaikrajang
- Department of Chemistry, School of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Senee Kruanetr
- Center of Excellence for Innovation in Chemistry (PERCH-CIC), Department of Chemistry, Faculty of Science, Mahasarakham University, Kantharawichai District, Mahasarakham 44150, Thailand
| | - David J Harding
- Functional Materials and Nanotechnology Centre of Excellence (FuNTech), Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Parawee Rattanakit
- Department of Chemistry, School of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand.
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Detection of Fe(III)EDTA by using photoluminescent carbon dot with the aid of F - ion. Food Chem 2018; 258:51-58. [PMID: 29655753 DOI: 10.1016/j.foodchem.2018.03.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 03/10/2018] [Accepted: 03/12/2018] [Indexed: 11/23/2022]
Abstract
Iron(III) ethylenediaminetetraacetate (Fe(III)EDTA) is widely used in iron fortification for reducing iron deficiency, and its determination is urgently needed. The present work developed a fluorescent method to straightforwardly determine Fe(III)EDTA by using photoluminescent carbon dots (C-dots) with the aid of F- ions as the masking agent of free Fe3+ ions. In the presence of F- ions, only Fe(III)EDTA selectively quenched the photoluminescence of C-dots, and both Fe3+ and Fe2+ as well as other carboxylic acids have no effect on the emission of C-dots. The sensing mechanism was attributed to the ligand-tailored electron transfer process from C-dots to Fe3+. Under optimum conditions, this method showed a linear calibration plot over the Fe(III)EDTA range of 1.0-200 μmol L-1 and a detection limit of 0.4 μmol L-1. The proposed method was successfully applied to determine Fe(III)EDTA in real samples with acceptable recoveries of spikes (95%-110%) and repeatability (RSD, 4.2%-9.5%).
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Chen X, Song D, Xu J, Sun G, Xu M. Microbial depassivation of Fe(0) for contaminant removal under semi-aerobic conditions. Appl Microbiol Biotechnol 2017; 101:8595-8605. [PMID: 29018943 DOI: 10.1007/s00253-017-8549-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 09/11/2017] [Accepted: 09/17/2017] [Indexed: 01/23/2023]
Abstract
Increasing evidence has shown that the reaction of zero-valent iron [Fe(0)] by oxygen can produce strong oxidants and rapidly oxidize the tractable contaminants. However, Fe(0) is vulnerable to passivation in the presence of oxygen, which significantly decreases its surface reactivity towards the removal of refractory contaminants. Microorganisms capable of reducing ferric iron in the presence of oxygen are expected to overcome the limitation of Fe(0) passivation. However, no studies to date have shown that microorganisms are able to depassivate Fe(0) for the removal of recalcitrant compounds in the presence of oxygen. In this study, we demonstrated that the carotenoid-producing Sphingobium hydrophobicum C1 was able to significantly enhance the removal of deca-brominated diphenyl ether by depassivating Fe(0) and subsequently removing the newly formed metabolites under semi-aerobic conditions (> 4 mg/L oxygen). S. hydrophobicum C1 effectively depassivated Fe(0) and regenerated its reactivity by reducing ferric iron under semi-aerobic conditions. Some unique characteristics of S. hydrophobicum C1, including the presence of membrane-integrated carotenoids and certain cell proteins, were essential for the ferric iron reduction of S. hydrophobicum C1 in the presence of oxygen. Our results may provide new insights into the bioremediation of persistent pollutants and will contribute to future studies to enhance our understanding of microbial iron reduction.
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Affiliation(s)
- Xingjuan Chen
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Da Song
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Jingjing Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Guoping Sun
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China.,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China.,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China
| | - Meiying Xu
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Institute of Microbiology, 100 Central Xianlie Road, 510070, Guangzhou, People's Republic of China. .,State Key Laboratory of Applied Microbiology Southern China, Guangzhou, 510070, China. .,Guangdong Open Laboratory of Applied Microbiology, Guangzhou, 510070, China.
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Size dependent microbial oxidation and reduction of magnetite nano- and micro-particles. Sci Rep 2016; 6:30969. [PMID: 27492680 PMCID: PMC4974511 DOI: 10.1038/srep30969] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 07/12/2016] [Indexed: 01/30/2023] Open
Abstract
The ability for magnetite to act as a recyclable electron donor and acceptor for Fe-metabolizing bacteria has recently been shown. However, it remains poorly understood whether microbe-mineral interfacial electron transfer processes are limited by the redox capacity of the magnetite surface or that of whole particles. Here we examine this issue for the phototrophic Fe(II)-oxidizing bacteria Rhodopseudomonas palustris TIE-1 and the Fe(III)-reducing bacteria Geobacter sulfurreducens, comparing magnetite nanoparticles (d ≈ 12 nm) against microparticles (d ≈ 100–200 nm). By integrating surface-sensitive and bulk-sensitive measurement techniques we observed a particle surface that was enriched in Fe(II) with respect to a more oxidized core. This enables microbial Fe(II) oxidation to occur relatively easily at the surface of the mineral suggesting that the electron transfer is dependent upon particle size. However, microbial Fe(III) reduction proceeds via conduction of electrons into the particle interior, i.e. it can be considered as more of a bulk electron transfer process that is independent of particle size. The finding has potential implications on the ability of magnetite to be used for long range electron transport in soils and sediments.
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