Probing Methylmercury Photodegradation by Different Fractions of Natural Organic Matter in Water: Degradation Kinetics and Mercury Isotope Fractionation Characteristics.

Recent advancements in mercury (Hg) isotopic fractionation research have evolved from conceptual demonstrations to practical applications. However, few studies have focused on revealing fractionation fingerprinting for aqueous methylmercury (MeHg) photodegradation due to its sensitivity to natural organic matter (NOM). Here, the impact of NOM fractions with varying chemical properties on MeHg photodegradation kinetics and Hg isotope fractionation characteristics was investigated.

Metalloproteomic Analysis of Hemophilic Arthropathy Synovial Tissue: Insights into Metal Overload and Pathogenesis.

Background: Hemophilic arthropathy (HA) is a joint disease characterized by local iron overload, stemming from erythrocyte rupture and closely linked to synovial lesions. However, the precise molecular characteristics of clinical HA synovial samples remain to be defined.

Objectives: To gain insight into HA synovial tissue lesions, we utilized a metalloprotein strategy to compare the metal and protein spectra of HA with those of osteoarthritis (OA) and rheumatoid arthritis (RA).

Historical (1960 - 2011) and spatial analysis of mercury and arsenic in two species of tropical birds in southeastern Mexico.

Spatiotemporal variation in the concentrations of mercury (Hg) and arsenic (As) in body feathers of Red-throated Ant-Tanager (Driophlox fuscicauda) and Clay-colored thrush (Turdus grayi) were evaluated. Body feathers were obtained from scientific collections (specimens collected from 1960 to 2011) in Mexico. Trace elements concentrations were determined by voltammetry through acid digestion.

Analysis of biokinetic parameters reveals patterns in mercury accumulation across aquatic species.

Mercury (Hg) is a potent neurotoxicant and poses a risk to human health through the ingestion of Hg-contaminated fish. Mercury, especially in its organic form methylmercury (MeHg), biomagnifies up food chains such that even small aqueous concentrations of Hg can result in significant concentrations of total Hg in fish. Understanding the ecological and human health risks associated with Hg and MeHg exposure requires an understanding of the factors that affect its bioaccumulation in aquatic species.

Recent advances in the study of mercury biogeochemistry in Arctic permafrost ecosystems.

Permafrost predominates in polar and high mountain regions, encompassing nearly 15 % of the exposed land in the Northern Hemisphere. It denotes soil or rock that remains at or below 0 °C for the duration of at least two consecutive years. These frozen soils serve as a barrier to contaminants that are stored and accumulated in permafrost over extended periods of time.

A coumarin and 1,8-napthyridine conjugated novel molecular hybrid: Synthesis, DFT insights and unveiling the selective fluorescent sensing of Hg ions with live-cell imaging application.

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).

Trace elements in Alaska's ice seals in the 2000s and 2010s.

Ringed (Pusa hispida), bearded (Erignathus barbatus), spotted (Phoca largha), and ribbon (Histriophoca fasciata) seals are ice-associated seals that are important subsistence resources for coastal Alaska Native people. These seals are also mid- to upper trophic level Arctic predators and primary prey of polar bears (Ursus maritimus). We analyzed concentrations of 19 trace elements in seal liver, kidney, muscle, and blubber, including arsenic, cadmium, lead, mercury, and vanadium due to their potential toxicity.

Human health risk assessment from potentially toxic elements in the soils of Sudan: A meta-analysis.

Potentially toxic elements (PTEs) in soils threaten human health through several exposure pathways. However, health risks posed by PTEs in soils in developing countries have not yet been comprehensively investigated. Thus, such countries lack important information that is needed to implement sustainable solutions.

Association of urinary levels of trace metals with type 2 diabetes and obesity in postmenopausal women in Korea: A community-based cohort study.

Several toxic metals have been associated with metabolic diseases like obesity and diabetes mellitus (DM) in humans. However, knowledge regarding the influence of many trace elements, especially in combination with essential elements is limited. This study aims to address this research gap by investigating the associations of both non-essential and essential inorganic trace elements in urine with DM and obesity, employing a group of postmenopausal women (n = 851) from the Korean Genome and Epidemiology Study (KoGES) cohort.

Pathways and risk analysis of arsenic and heavy metal pollution in riverine water: Application of multivariate statistics and USEPA-recommended risk assessment models.

This study analyzed surface water from the River Swat, Pakistan, using inductively coupled plasma mass spectrometry, multivariate statistical techniques, and US-EPA risk assessment models to evaluate the concentrations, distribution, pathways, and potential risks of arsenic (As) and heavy metals, including chromium (Cr), manganese (Mn), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), cadmium (Cd), mercury (Hg), and lead (Pb). The results revealed significant correlations (p ≤ 0.01) among metals that indicated common pollution sources, likely influenced by anthropogenic point and non-point activities.

Mercury removal from mining wastewater by bioaccumulation and thermal separation in Eichhornia crassipes.

Environmental problems persist due to mercury from artisanal and small-scale gold mining (ASGM) as well as ecological problems associated with the macrophyte Eichhornia crassipes Martius (EC). Environmental problems persist due to mercury contamination from artisanal and small-scale gold mining (ASGM) and ecological issues related to the macrophyte Eichhornia crassipes Martius (EC). A bioaccumulation study was conducted on mercury-laden wastewater (WWm) from ASGM using a pilot treatment plant, specifically a constructed wetland system (CW) with the macrophyte species EC.

Plasmonic MOF for Highly Selective SERS Sensing of Trace Mercury (II) in Complex Matrices.

Developing Ag-based surface-enhanced Raman spectroscopy (SERS) sensors for detecting Hg(II) has garnered significant research interest due to their unparalleled selectivity, which is brought by the specific Ag-Hg amalgamation reaction. However, existing sensors perform unsatisfactorily in the trace detection of Hg(II) because the low concentration of Hg(II) does not have the redox potential sufficient to amalgamate with Ag. To address this challenge, a plasmonic MOF SERS sensor is developed, nanoetched Ag@UiO-68-SMe, by integrating the enormous Raman enhancement effects of nanoetched Ag with the selective enrichment function of UiO-68-SMe into single entity.

Trophic magnification rates of eighteen trace elements in freshwater food webs.

Trace elements play diverse roles in animal physiology ranging from essential micronutrients to potent toxicants. Despite animals accumulating many trace elements through their diets, relationships between trophic positions and biological concentrations of most trace elements remain poorly described. We report trophic transfer rates of Al, As, Ba, Cd, Co, Cu, Fe, Hg, Mn, Ni, Pb, Se, Sr, Ti, Tl, U, V, and Zn from 31 freshwaters located in distinct biogeographic regions.

Transport of particulate mercury along the reservoir- downstream - estuary continuum during the water-sediment regulation scheme period of Yellow River in 2018.

As an important link of mercury (Hg) migration and transformation from land to ocean, rivers have been significantly influenced by anthropogenic activities, resulting in unpredictable environmental influences on the basin and offshore areas. In this study, the particulate Hg content of sediments in Xiaolangdi Reservoir (XLDR), Lijin Hydrological Station, and the Yellow River estuarine area during the water-sediment regulation scheme (WSRS) period in 2018 were analyzed, the characteristics and influencing factors of particulate Hg transport were explored. Our results revealed that the transport flux of particulate Hg into the sea during WSRS was 8.

Architecture of a novel NIR and switch-on fluorescent chemosensor based on mercapto propanehydrazide-functionalized chromenylium-cyanine for the quantification of mercury(II) in environment and living cells.

A novel probe NIR8 decorated with colorimetric, fluorometric, turn-on, and NIR properties was designed and synthesized using the chromenylium-cyanine platform for sensitive and selective quantification of Hg in real samples. The interaction between the probe and Hg resulted in the opening of the closed spirolactam ring of the chromenylium-cyanine platform, leading to a notable color shift from yellow to green. Concurrently, ratiometric spectral changes at 380 and 725 nm for UV-Vis and signal enhancement at 755 nm for fluorescence were observed.

From BpTRU to OMRON: The impact of changing automated blood pressure measurement devices on blood pressure estimates among children and youth.

Background: After six cycles of using the BpTRU (BT) BPM-300 blood pressure (BP) monitor, the Canadian Health Measures Survey (CHMS) introduced the OMRON (OM) IntelliSense HEM-907XL BP monitor in Cycle 7. This study assesses differences between BP values measured by both devices in children and youth aged 6 to 17 years and whether equations could be developed to compare BP measurements taken using the two devices.

Data And Methods: In Cycle 6 (2018 to 2019) of the CHMS, BP was measured using BT and OM devices.

As, Cd, Hg, and Pb Biological Concentrations and Anthropometry in Slovak Adolescents.

Anthropometry provides a non-invasive technique for evaluating growth and obesity and serves as an indicator of health status. This cross-sectional study aims to investigate the association of internal arsenic (As), cadmium (Cd), total mercury (THg), methylmercury (MeHg), and lead (Pb) exposure with anthropometric parameters, including obesity, in adolescents. Participants (N = 320) were children aged 10-14 years (mean 11.

PLASMA TRACE ELEMENTS IN MANAGED HUMBOLDT PENGUINS () FROM A SINGLE ZOOLOGICAL COLLECTION IN GERMANY.

Only limited data on concentrations of trace elements in the blood of avian species have been published. This information can play an important role in the conservation of endangered species and their protection from environmental pollutants and can also be clinically relevant in managed individuals. Some elements are essential for the health of the animals in human care, but little is known about expected concentrations for some of these elements.

Iron addition promotes mercury removal from soil by Robinia pseudoacacia-rhizobia symbiosis.

Iron plaques on the root surface can promote or inhibit the absorption and accumulation of heavy metals by plants. However, the mechanism by which iron regulates the response of Robinia pseudoacacia to mercury (Hg) have not been elucidated which hinders its application in divalent Hg (Hg2+) removal from Hg-contaminated soil. In this study, association analyses between transcriptome and metabolome were used to investigate effects of iron on the rhizosphere microenvironment and performance of R.

Removal of Lead, Cadmium, and Mercury in Monometallic and Trimetallic Aqueous Systems Using L.

The presence of heavy metals in water represents a risk to the life of all species on the planet. Phytoremediation is an effective alternative to remove heavy metals from contaminated aqueous environments. In the present research, L.

Exploring the Human Health Impact of Artificial Turf Worldwide: A Systematic Review.

The growing use of artificial turf in place of natural turf in residential, recreational and commercial settings has raised concerns regarding its potential impact on human health. A systematic review of databases revealed 5673 articles of which, 30 were deemed eligible. Those performing total concentration analyses, bioaccessibility analyses or human health risk assessments (HHRAs) of artificial turf fibres or crumb rubber infill were of interest.

Weak Spots in Semiconductor Nanoplatelets: From Isolated Defects Toward Directed Nanoscale Assemblies.

The chemical engineering of nanostructures with atomic-scale precision is a fundamental scientific challenge. Cation exchange reactions in nanoplatelets (NPLs) offer an attractive platform for this precision chemistry, as it is relatively simple to carry out, extremely versatile, and allows the production of heterogeneous nanostructures that cannot be produced by any other means. A major hindrance has, however, been the lack of knowledge of the "weak spots" of the platelets where the ionic exchange reaction is initiated to optimally control the process toward directed nanoscale assemblies.

Association between blood heavy metals and fecal incontinence in American adults: A population-based study.

Background: Previous studies have revealed the impact of heavy metals (HMs) on gut microbiota and intestinal structure. However, the relationship between HMs and fecal incontinence (FI) remains unclear. Therefore, this study aims to evaluate the association between blood HMs exposure and FI.

Phenylmercury stress induces root tip swelling through auxin homeostasis disruption.

We previously reported that in Arabidopsis, the phytochelatin-mediated metal-detoxification machinery is also essential for organomercurial phenylmercury (PheHg) tolerance. PheHg treatment causes severe root growth inhibition in cad1-3, an Arabidopsis phytochelatin-deficient mutant, frequently accompanied by abnormal root tip swelling. Here, we examine morphological and physiological characteristics of PheHg-induced abnormal root tip swelling in comparison to Hg(II) stress and demonstrate that auxin homeostasis disorder in the root is associated with the PheHg-induced root tip swelling.

Impact of shipbreaking industries on the Sitakunda coastal environment, Chattogram by analyzing water quality parameters.

Shipbreaking is an extremely profitable business; however, it simultaneously destroys the surrounding environment. The discharge of toxic chemicals and materials containing wastes is contaminating surrounding water. However, there is still no sufficient published information particularly focusing on shipbreaking yard (SBY) water quality.