The study of heavy metal content in the sediments of the coastal zone of Qinzhou Harbour was used to analyse the level, distribution and sources of heavy metal pollution in the region and its hazards to the ecological environment and human health. The results showed that the average concentrations of Mn, Ni, Cr, Cu, and Pb exceeded background values along the shores of Qinzhou Harbour, Guangxi. Comprehensive assessments using Igeo, RI, and PLI identified Cu, Ni, and Pb as primary contaminants in the area, presenting slight to moderate ecological risks and biological toxic effects. Source analysis suggested that these metals primarily originated from anthropogenic activities including shipbuilding, chemical plant discharges, oil refining, and industrial smelting. Integrating SQGs with human health risk models revealed carcinogenic risks associated with Ni exposure, particularly for children. However, noncarcinogenic risks were not significant, and the risk to children was higher than to adults.
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http://dx.doi.org/10.1016/j.marpolbul.2024.117442 | DOI Listing |
Mikrochim Acta
December 2024
Department of Chemistry, Yazd University, Yazd, 89195-741, Iran.
An electrochemical aptasensor has been developed specifically for the sensitive and selective determination of ochratoxin A (OTA), one of the most important mycotoxins. The aptasensor utilizes a glassy carbon electrode that has been modified with toluidine blue (TB) encapsulated in a Zn-based metal-organic framework (TB@Zn-MOF). The results demonstrate that in the presence of OTA, the peak current of the differential pulse voltammogram (DPV) related to TB oxidation is notably decreased.
View Article and Find Full Text PDFMikrochim Acta
December 2024
Key Laboratory for Analytical Science of Food Safety and Biology, MOE, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350108, China.
A triple signal amplified electrochemical aptasensor for the detection of bisphenol A (BPA) was developed for the first time based on gold nanoparticles (AuNPs), hemin/G-quadruplex DNAzyme, and exonuclease I (Exo I) assisted amplification strategies. The BPA aptamer (Apt) hybridized with the capture probe (CP) was fixed on the gold electrode (GE) to form the double-stranded DNA (dsDNA) structure. When BPA was present, the Apt was detached from the GE surface by specific recognition between the BPA and Apt, forming BPA-Apt complexes in solution.
View Article and Find Full Text PDFWorld J Microbiol Biotechnol
December 2024
Departamento de Investigaciones Científicas y Tecnológicas, Universidad de Sonora, Blvd. Luis Donaldo Colosio s/n, entre Reforma y Sahuaripa, Edificio 7G, Col. Centro, Hermosillo, Sonora, C.P. 83000, Mexico.
Contamination of water bodies is a significant global issue that results from the deliberate release of pollutants into the environment, especially from mining and metal processing industries. The main pollutants generated by these industries are metallic wastes, particularly metals, which can cause adverse effects on the environment and human health. Therefore, it is crucial to develop effective and sustainable approaches to prevent their discharge into the environment.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
December 2024
College of Horticulture and Plant Protection, Henan University of Science and Technology, Luoyang, 471023, PR China.
The occurrence of chemical effluents in different water bodies is an emerging concern. However, the effect of laboratory effluents on the canal ecosystem in Bangladesh is largely unknown. In this study, we collected 10 components of the canal ecosystem including sediments, water, fish, crabs, snails, phytoplanktons, and weeds specifically from canals that directly receive laboratory effluents.
View Article and Find Full Text PDFMikrochim Acta
December 2024
Shanghai University of Medicine & Health Sciences, Shanghai, 201318, China.
A novel electrochemiluminescence (ECL) biosensor was developed for the ultrasensitive detection of miRNA-155, based on the synergistic combination of multifunctional nanomaterials. The biosensor employed a conductive metal-organic framework (MOF), Ni(HAB) (HAB = hexaaminobenzene), as the substrate material. The unique π-electron conjugated structure of Ni(HAB) endowed the biosensor with excellent electron transport properties, significantly enhancing its sensitivity.
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