Nanomaterials-modified disposable electrodes and portable electrochemical systems for heavy metals detection in wastewater streams: A review

GadelHak, Yasser; Hafez, Sarah H. M.; Hamed, Mohamed; Abdel-Hady, E.E.; Mahmoud, Rehab

doi:10.1016/j.microc.2023.109043

Cited by 21 publications

(4 citation statements)

References 146 publications

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“…Electrochemical and colorimetric nanosensors have emerged as promising alternatives due to their high sensitivity, specificity, affordability, mobility, and rapid detection capabilities [ 82 ]. Various electrochemical nanosensors have gained attention for their ability to identify heavy metal ions with high efficiency and specificity, making them appropriate for on-demand, in situ, and field applications [ 83 , 84 ]. Similarly, colorimetric nanosensors enable quick screening and visual detection for point-of-use applications.…”

Section: Application Of Nanosensors For the Detection Of Heavy Metalsmentioning

confidence: 99%

Revisiting the Role of Sensors for Shaping Plant Research: Applications and Future Perspectives

Tyagi,

Mir,

Ali

2024

Sensors

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Plant health monitoring is essential for understanding the impact of environmental stressors (biotic and abiotic) on crop production, and for tailoring plant developmental and adaptive responses accordingly. Plants are constantly exposed to different stressors like pathogens and soil pollutants (heavy metals and pesticides) which pose a serious threat to their survival and to human health. Plants have the ability to respond to environmental stressors by undergoing rapid transcriptional, translational, and metabolic reprogramming at different cellular compartments in order to balance growth and adaptive responses. However, plants’ exceptional responsiveness to environmental cues is highly complex, which is driven by diverse signaling molecules such as calcium Ca2+, reactive oxygen species (ROS), hormones, small peptides and metabolites. Additionally, other factors like pH also influence these responses. The regulation and occurrence of these plant signaling molecules are often undetectable, necessitating nondestructive, live research approaches to understand their molecular complexity and functional traits during growth and stress conditions. With the advent of sensors, in vivo and in vitro understanding of some of these processes associated with plant physiology, signaling, metabolism, and development has provided a novel platform not only for decoding the biochemical complexity of signaling pathways but also for targeted engineering to improve diverse plant traits. The application of sensors in detecting pathogens and soil pollutants like heavy metal and pesticides plays a key role in protecting plant and human health. In this review, we provide an update on sensors used in plant biology for the detection of diverse signaling molecules and their functional attributes. We also discuss different types of sensors (biosensors and nanosensors) used in agriculture for detecting pesticides, pathogens and pollutants.

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Section: Application Of Nanosensors For the Detection Of Heavy Metalsmentioning

confidence: 99%

Revisiting the Role of Sensors for Shaping Plant Research: Applications and Future Perspectives

Tyagi,

Mir,

Ali

2024

Sensors

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“…Continuous water quality monitoring and research into the sources and effects of heavy metal pollution are essential for developing effective mitigation strategies. Among various analytical techniques, electrochemical detection is a powerful and widely used method for quantifying and monitoring heavy metals in different environmental samples, including water, soil, and air [87,88]. In this regard, portable and disposable electrochemical sensors have generated considerable attention because of their ease of use, cost-effectiveness, and suitability for on-site monitoring [89][90][91][92][93].…”

Section: Portable Electrochemical Nanosensors For the Detection Of He...mentioning

confidence: 99%

Electrochemical and Colorimetric Nanosensors for Detection of Heavy Metal Ions: A Review

Fakayode,

Walgama,

Fernand Narcisse

et al. 2023

Sensors

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Human exposure to acute and chronic levels of heavy metal ions are linked with various health issues, including reduced children’s intelligence quotients, developmental challenges, cancers, hypertension, immune system compromises, cytotoxicity, oxidative cellular damage, and neurological disorders, among other health challenges. The potential environmental HMI contaminations, the biomagnification of heavy metal ions along food chains, and the associated risk factors of heavy metal ions on public health safety are a global concern of top priority. Hence, developing low-cost analytical protocols capable of rapid, selective, sensitive, and accurate detection of heavy metal ions in environmental samples and consumable products is of global public health interest. Conventional flame atomic absorption spectroscopy, graphite furnace atomic absorption spectroscopy, atomic emission spectroscopy, inductively coupled plasma–optical emission spectroscopy, inductively coupled plasma–mass spectroscopy, X-ray diffractometry, and X-ray fluorescence have been well-developed for HMIs and trace element analysis with excellent but varying degrees of sensitivity, selectivity, and accuracy. In addition to high instrumental running and maintenance costs and specialized personnel training, these instruments are not portable, limiting their practicality for on-demand, in situ, field study, or point-of-need HMI detection. Increases in the use of electrochemical and colorimetric techniques for heavy metal ion detections arise because of portable instrumentation, high sensitivity and selectivity, cost-effectiveness, small size requirements, rapidity, and visual detection of colorimetric nanosensors that facilitate on-demand, in situ, and field heavy metal ion detections. This review highlights the new approach to low-cost, rapid, selective, sensitive, and accurate detection of heavy metal ions in ecosystems (soil, water, air) and consumable products. Specifically, the review highlights low-cost, portable, and recent advances in smartphone-operated screen-printed electrodes (SPEs), plastic chip SPES, and carbon fiber paper-based nanosensors for environmental heavy metal ion detection. In addition, the review highlights recent advances in colorimetric nanosensors for heavy metal ion detection requirements. The review provides the advantages of electrochemical and optical nanosensors over the conventional methods of HMI analyses. The review further provides in-depth coverage of the detection of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn) ions in the ecosystem, with emphasis on environmental and biological samples. In addition, the review discusses the advantages and challenges of the current electrochemical and colorimetric nanosensors protocol for heavy metal ion detection. It provides insight into the future directions in the use of the electrochemical and colorimetric nanosensors protocol for heavy metal ion detection.

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“…Nanomaterials improve electrode properties that are important in voltammetric measurements; for example, they increase the surface area of the working electrode, exhibit excellent electrical conductivity, and have good chemical stability [21]. There has already been a lot of work on the determination of metal ions on an electrode modified with carbon nanotubes [22][23][24][25][26][27]. Another important aspect in the selection of a working electrode, apart from its composition, is its design.…”

Section: Introductionmentioning

confidence: 99%

Screen-Printed Carbon Electrode Modified with Carbon Nanotubes and Copper Film as a Simple Tool for Determination of Trace Concentrations of Lead Ions

Grabarczyk,

Wawruch

2024

Membranes

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A copper film-modified, carboxyl-functionalized, and multi-walled carbon nanotube (MWCNT-COOH)-modified screen-printed carbon electrode (CuF/MWCNTs/SPCE) was used for lead determination using anodic stripping voltammetry. The main parameters were investigated and optimized during the development of the research procedure. The most optimal electrolyte concentrations were determined to be 0.4 M HCl and 6.3 × 10−5 M Cu(II). The optimal parameters for voltammetric stripping measurements are as follows: an accumulation potential of −0.7 V; an accumulation time of 120 s; and a pulse amplitude and pulse time of 120 mV and 2 ms, respectively. The effect of surface active substances and humic substances as potential interferents present in aqueous environmental samples was investigated. The validation of the procedure was carried out using certified reference materials, like waste water SPS-WW1 and environmental matrix TM-25.5. In addition, the developed procedure was applied to investigate lead recovery from natural environmental water, such as rivers and lakes.

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Nanomaterials-modified disposable electrodes and portable electrochemical systems for heavy metals detection in wastewater streams: A review

Cited by 21 publications

References 146 publications

Revisiting the Role of Sensors for Shaping Plant Research: Applications and Future Perspectives

Revisiting the Role of Sensors for Shaping Plant Research: Applications and Future Perspectives

Electrochemical and Colorimetric Nanosensors for Detection of Heavy Metal Ions: A Review

Screen-Printed Carbon Electrode Modified with Carbon Nanotubes and Copper Film as a Simple Tool for Determination of Trace Concentrations of Lead Ions

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