Owing to the high cost and unavailability of different analytical techniques, there is an urgent need to develop new techniques not only for detecting but also removing mercury ions in real samples. Thus, an optical chemical sensor based on the anchoring of phenanthraquinone monophenylthiosemicarbazone in a plasticized cellulose triacetate membrane was fabricated and applied to the recognition and removal of mercury ions from aqueous solutions. The synthesized optode was characterized by FT-IR, SEM, AFM, and thermal analysis. Several parameters, including the pH, temperature, contact time, washing solvent, and washing time, were optimized. Under optimal conditions, a promising optode film platform was utilized for sensing mercury ions, and the concentrations were calculated based on colorimetric analysis (Histogram, RGB) of digital images, visualization, and spectrophotometry. Also, an optical optode was used for complete adsorption of mercury ions from aqueous solutions. In addition, the regeneration of the synthesized optode was evaluated using 0.1 mol L nitric acid, which effectively removed all adsorbed mercury ions. The obtained data indicated good linearity in the sensing and adsorption of Hg over a concentration range of 0.005-5000 µgL with a low limit of detection (LOD = 0.066 µgL) and limit of quantification (LOQ, 0.22 µgL). Furthermore, it showed good distinctions in the presence of coexisting ions, high stability (five months), good applicability, and reproducibility (RSD = 1.31%), making it a promising sensor for Hg detection. On the other hand, the kinetic studies revealed that the pseudo-second-order was the best model for describing the adsorption behavior of mercury ions on the optode surface. Also, the thermodynamic parameters indicate spontaneous (ΔG < 0) and endothermic (ΔH < 0) reactions. Also, the maximum adsorption capacity was found to be 73.2 mg g. Thus, the optodes were successfully applied for the detection and/or removal of Hg in different real samples, including cucumber, fish, soil, and water samples, with excellent recoveries of 98.1-99.5%.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11531490PMC
http://dx.doi.org/10.1038/s41598-024-76571-yDOI Listing

Publication Analysis

Top Keywords

mercury ions
28
optical optode
8
ions
8
real samples
8
ions aqueous
8
aqueous solutions
8
synthesized optode
8
mercury
7
optode
6
novel optical
4

Similar Publications

Herein, we have used a simple synthetic strategy to access a novel non-sulfur fluorescent molecular probe coumarin and 1,8-napthyridine conjugated probe DNCS. The developed probe has great selectivity and sensitivity for detecting Hg ions. Our photophysical properties evaluation for the synthesized probe with different metal ions (Ba, Al, Ca, Bi, Ce, Cd, Cu, Sr, Co, Fe, Cr, Fe, Mn, Hg, Zn, Pb, Ni, and Sn) unveiled the very selective and sensitive fluorescence sensing behavior with Hg ions in the energy window of near UV and visible light radiation in an organic aqueous solvent mixture (EtOH and water).

View Article and Find Full Text PDF

Mercury (Hg) has been recognized as a global pollutant with a toxic, mobile, and persistent nature. It adversely affects the ecosystem and human health. Already developed biosensors for Hg detection majorly suffer from poor sensitivity and specificity.

View Article and Find Full Text PDF

Carbon Quantum Dots Based Nanocomposite for Selective Mercury Detection.

Small

December 2024

Nanostructures Engineering and Modeling Laboratory, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, Maharashtra, 400076, India.

The emergence of 2D carbon-based materials has a profound impact on various research areas, such as biosciences, electronics, optics, environmental protection, and monitoring. Mercury, a highly toxic pollutant, can cause severe health complications such as neural toxicity, insomnia, cognitive dysfunction, muscle atrophy, peripheral vision impairment, and emotional instability. A suitable 2D nanostructural interface is required to effectively monitor mercury levels in the environment.

View Article and Find Full Text PDF

The effect of Bi-to-metal ion concentration ratio ( / ratio) on key evaluation indicators, including sensitivity, precision, and cathodic potential range, has been investigated for the determination of Cd and Pb at prepared bismuth film electrodes. Unlike the usual recommendation of at least a 10-fold excess of Hg(ii) for anodic stripping experiments at prepared mercury film electrodes, it is found that the / ratios in the 1-10 range are sufficient to obtain a high determination sensitivity, but that the signal decreases significantly when the ratio exceeds 40. Further analysis shows that the precision of the analytical results is good when the / ratio is in the range of 5-10.

View Article and Find Full Text PDF

Thiolated non-conjugated nano polymer network for advanced mercury removal from water.

J Hazard Mater

December 2024

Interdisciplinary Research Center for Agriculture Green Development in Yangtze River Basin, College of Resources and Environment, Southwest University, Chongqing 400715, China. Electronic address:

Developing advanced adsorbents for selectively deducing mercury (Hg) in water to one billionth level is of great significance for public health and ecological security, but achieving the balance among efficiency, cost and environmental friendliness of adsorbents still faces enormous challenges. Herein, we present a high thiol content non-conjugated nano polymer network (PVB-SH) through simple microemulsion polymerization for efficient Hg ion (Hg(II)) removal. The PVB-SH is prepared by conventional commercial reagents and does not consume toxic organic solutions.

View Article and Find Full Text PDF

Want 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!