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Electrochemical Sensing for Environmental Monitoring
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Electrochemical Sensing for Environmental Monitoring

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Environmental Sensing".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 5783

Special Issue Editors

Dr. Ivo Allegrini

E-Mail Website
Guest Editor
Envint Srl, Via Paradiso 65a, Montopoli di Sabina, 02434 Rieti, Italy
Interests: air pollution and environmental monitoring
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Federica Valentini

E-Mail Website
Guest Editor
Department of Sciences and Chemical Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy
Interests: green chemical synthesis; nanomaterials; nanotechnologies; template synthesis in essential oils; functionalized nanoparticles in essential oils; cultural heritage applications; drug delivery; drug discovery; bio-compatible nanocomposite materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Considering the pollution events affecting urban areas and remote and rural zones, it has become necessary to develop new sensitive and highly selective devices which are able to monitor aggressive pollutants. Chemical pollutants are both gaseous species and particulate matter. The former are emitted from primary sources and then undergo secondary transformations. Monitoring of both primary and secondary pollutants implies the use of analytical devices, such as samplers and sensors, which need to be specific, highly selective, miniaturizable, low-cost, easy to handle, and equipped with wireless connection for acquiring the signal from “remote” systems. To achieve all these analytical performances, high technology (recently also electroanalytical chemistry) combined with innovative functionalized nanomaterials have been developed on a large scale, especially for the control of large areas. In this way, it is possible to acquire more representative knowledge of photochemical smog phenomena, responsible for the release of several precursor species. Moreover, portable devices can be equipped with a regeneration system to provide a long-time autonomy for “in situ” applications. Furthermore, the possibility of integrating sensors in circuits having neuronal networks for signal processing, also having ICT and IoT programs, represents a future challenge in the field of environmental digital monitoring and air quality control.

Dr. Ivo Allegrini
Prof. Dr. Federica Valentini
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Environmental pollution
  • Gaseous pollutants
  • Particulate matter
  • Sensors
  • Samplers
  • Miniaturizable devices
  • Wireless connection
  • Regenerated sensors
  • Sensitivity and selectivity

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Published Papers (2 papers)

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Research

18 pages, 3784 KiB  
Article
Electrochemical Sensing of Lead in Drinking Water Using Copper Foil Bonded with Polymer
by Taufique Z. Redhwan, Younus Ali, Matiar M. R. Howlader and Yaser M. Haddara
Sensors 2023, 23(3), 1424; https://doi.org/10.3390/s23031424 - 27 Jan 2023
Cited by 4 | Viewed by 2925
Abstract
Levels of lead (Pb) in tap water that are well below established guidelines are now considered harmful, so the detection of sub-parts-per-billion (ppb) Pb levels is crucial. In this work, we developed a two-step, facile, and inexpensive fabrication approach that involves direct bonding [...] Read more.
Levels of lead (Pb) in tap water that are well below established guidelines are now considered harmful, so the detection of sub-parts-per-billion (ppb) Pb levels is crucial. In this work, we developed a two-step, facile, and inexpensive fabrication approach that involves direct bonding of copper (Cu) and liquid crystal polymer (LCP) followed by polyester resin printing for masking onto Cu/LCP to fabricate Cu thin-film-based Pb sensors. The oxygen plasma-treated surfaces resulted in strongly bonded Cu/LCP with a high peel strength of 500 N/m due to the highly hydrophilic nature of both surfaces. The bonded specimen can withstand wet etching of the electrode and can address delamination of the electrode for prolonged use in application environments. The Cu-foil-based electrochemical sensor showed sensitivity of ~11 nA/ppb/cm2 and a limit of detection (LOD) of 0.2 ppb (0.2 µg/L) Pb ions in water. The sensor required only 30 s and a 100 µL sample to detect Pb. To date, this is the most rapid detection of Pb performed using an all-Cu-based sensor. The selectivity test of Cu to Pb with interferences from cadmium and zinc showed that their peaks were separated by a few hundred millivolts. This approach has strong potential towards realizing low-cost, highly reliable integrated water quality monitoring systems. Full article
(This article belongs to the Special Issue Electrochemical Sensing for Environmental Monitoring)
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19 pages, 2404 KiB  
Article
A Novel Electrochemical Sensor Modified with a Computer-Simulative Magnetic Ion-Imprinted Membrane for Identification of Uranyl Ion
by Li-Qiong He, Zhi-Mei Wang, Yu-Jie Li, Jing Yang, Li-Fu Liao, Xi-Lin Xiao and Yong Liu
Sensors 2022, 22(12), 4410; https://doi.org/10.3390/s22124410 - 10 Jun 2022
Cited by 4 | Viewed by 2127
Abstract
In this paper, a novel ion-imprinted electrochemical sensor modified with magnetic nanomaterial Fe3O4@SiO2 was established for the high sensitivity and selectivity determination of UO22+ in the environment. Density functional theory (DFT) was employed to investigate the [...] Read more.
In this paper, a novel ion-imprinted electrochemical sensor modified with magnetic nanomaterial Fe3O4@SiO2 was established for the high sensitivity and selectivity determination of UO22+ in the environment. Density functional theory (DFT) was employed to investigate the interaction between templates and binding ligands to screen out suitable functional binding ligand for the reasonable design of the ion imprinted sensors. The MIIP/MCPE (magnetic ion imprinted membrane/magnetic carbon paste electrode) modified with Fe3O4@SiO2 exhibited a strong response current and high sensitivity toward uranyl ion comparison with the bare carbon paste electrodes. Meanwhile, the MCPE was fabricated simultaneously under the action of strong magnetic adsorption, and the ion imprinted membrane can be adsorbed stably on the electrode surface, handling the problem that the imprinted membrane was easy to fall off during the process of experimental determination and elution. Based on the uranyl ion imprinting network, differential pulse voltammetry (DPV) was adopted for the detection technology to realize the electrochemical reduction of uranyl ions, which improved the selectivity of the sensor. Thereafter, uranyl ions were detected in the linear concentration range of 1.0 × 10−9 mol L−1 to 2.0 × 10−7 mol L−1, with the detection and quantification limit of 1.08 × 10−9 and 3.23 × 10−10 mol L−1, respectively. In addition, the sensor was successfully demonstrated for the determination of uranyl ions in uranium tailings soil samples and water samples with a recovery of 95% to 104%. Full article
(This article belongs to the Special Issue Electrochemical Sensing for Environmental Monitoring)
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