The presence of heavy metal ions in the environment is a long-lasting problem that requires the simultaneous detection of Hg(II) and Pb(II) which is both vital and challenging. This present study examines a simplified and effective approach for synthesizing multi-walled carbon nanotube-copper manganese oxide (MWCNT-CuMnO) and multi-walled carbon nanotube-zinc manganese oxide (MWCNT-ZnMnO) nanocomposites for electrochemical detection of heavy metal ions. The nanocomposites MWCNT-CuMnO and MWCNT-ZnMnO exceptional electrochemical performance was evaluated using Square Wave Anodic Stripping Voltammetry (SWASV). The fabricated MWCNT-ZnMnO demonstrated lower values of Electrochemical Impedance Spectroscopy (EIS) with charge transfer resistance (R) of approximately 34.13 Ω. Remarkably, the MWCNT-ZnMnO electrochemical sensor exhibited the widest linear ranges of 0.5-10 μM with sensitive detection limits (0.011 μM for Hg(II) and 0.014 μM for Pb(II)). Interestingly, the MWCNT-ZnMnO sensor showed excellent capability in detecting Hg(II) and Pb(II) in real water samples with a recovery percentage of 94.1% and 91.3%. Overall, the MWCNT-ZnMnO modified GCE showcased superior selectivity, sensitivity, reproducibility, stability, and repeatability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s44211-024-00652-1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Nano-Fibrillated Bacterial Cellulose Nanofiber Surface Modification with EDTA for the Effective Removal of Heavy Metal Ions in Aqueous Solutions.
Materials (Basel)
January 2025
Division of Applied Chemistry and Biochemistry, National Institute of Technology, Tomakomai College, Nishikioka 443, Tomakomai 059-1275, Hokkaido, Japan.
Nano-fibrillated bacterial cellulose (NFBC) has very long fibers (>17 μm) with diameters of approximately 20 nm. Hence, they have a very high aspect ratio and surface area. The high specific surface area of NFBC can potentially be utilized as an adsorbent.
View Article and Find Full Text PDFEnhanced simultaneous voltammetric detection of lead, copper, and mercury using a MIL-101(Cr)-(COOH)@MWCNTs modified glassy carbon electrode.
Anal Chim Acta
February 2025
Chemistry Department, Faculty of Science, Ain-Shams University, Cairo, 11566, Egypt; Department of Chemistry, Faculty of Science, Galala University, New Galala City, Suez, Egypt. Electronic address:
Background: Electrochemical methods, particularly those utilizing sensors, offer distinct advantages over classical analytical methods. They are cost-effective, compatible with mass fabrication, suitable for remote sensing, and can be designed as handheld analyzers. In this context, MIL-101(Cr)-(COOH)₂@MWCNTs was utilized for the first time as a modifier for GCE for the sensitive voltammetric detection of Pb(II), Cu(II), and Hg(II).
View Article and Find Full Text PDFOccurrence, bioaccumulation, and ecological and health risks of Cd, Sn, Hg, and Pb compounds in shrimp and fish from aquaculture ponds.
J Hazard Mater
January 2025
College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, Zhejiang 311121, China. Electronic address:
Aquaculture organisms may accumulate metals to induce health risks. Compared with the focus on total contents, chemical-specific risk assessment makes reasonable but is rare. Herein, we elucidated occurrence of twelve metal compounds in shrimp and fish (edible muscle, one of major metal-containing and generally targeted organs), water, sediment, and feedstuff from two aquaculture ponds in Zhejiang Province (one of the major aquatic production and consumption areas).
View Article and Find Full Text PDFRapid on-site determination of heavy metals and metalloids in contaminated biochar samples by accelerated leaching process coupled with voltammetric sensors.
Talanta
January 2025
Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, CleanTech One, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore. Electronic address:
Heavy metals and metalloids are the most common environmental pollutants. Toxicity characteristic leaching procedure (TCLP) is a standard operating procedure that is used to assess heavy metal and metalloid compositions, and evaluate the hazardous nature of waste and waste-derived materials for reuse or disposal, such as determining landfill suitability. However, TCLP and the following detections are time-consuming and require bulky laboratory-based instruments and trained personnel.
View Article and Find Full Text PDFSimultaneous quantification of Hg(II) and Pb(II) by square wave anodic stripping voltammetry using Bi/graphite electrode.
Heliyon
July 2024
Engineering Faculty, Department of Environmental and Chemical Engineering, Universidad Nacional de Colombia, Colombia.
In the present work, we report the synthesis and evaluation of a graphite-supported bismuth film working electrode (BiFE) in the simultaneous quantification of Hg(II) and Pb(II) at ppb levels. The BiFE was synthesized in-situ by electrodeposition in 1 M HNO as the supporting electrolyte at -0.5 V potential.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!