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Mercury pollution risks of agricultural soils and crops in mercury mining areas in Guizhou Province, China: effects of large mercury slag piles
This study provided a scientific basis for the necessity of treating large slag piles in mercury mining areas. (Source: Environmental Geochemistry and Health)
Source: Environmental Geochemistry and Health - January 20, 2024 Category: Environmental Health Source Type: research

Risk assessment and source identification of soil heavy metals: a case study of farmland soil along a river in the southeast of a mining area in Southwest China
AbstractTo investigate the heavy metals (HMs) contamination of surface farmland soil along the river in the southeast of a mining area in southwest China and identify the contamination sources, 54 topsoil samples were collected and the concentrations of seven elements (Zn, Ni, Pb, Cu, Hg, Cr, and Co) were determined by inductively coupled plasma optical emission spectrometry (ICP-OES) and atomic fluorescence spectrometry (AFS). The geo-accumulation index (\(I_{geo}\)) and comprehensive potential ecological risk index (\(RI\)) were used for analysis to determine the pollution degree of HMs and the risk level of the study ar...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Geostatistical appraisal of water quality, contamination, source distribution of potentially toxic elements (PTEs) in the lower stretches of Subarnarekha River (Odisha), India, and health risk assessment by Monte Carlo simulation approach
AbstractIn the present study, the status of water quality, environmental contamination in the lower stretch of Subarnarekha River with respect to potentially toxic elements (PTEs), its seasonal distribution, and ecotoxicological health impacts were investigated. For this purpose, a combination of indexing approaches and geospatial methods was used. The estimated water quality index (WQI) has shown that the river water falls under “moderate to very poor” category during the pre-monsoon and “moderate to poor” category in the post-monsoon season. The abundance of PTEs (Pb, Cu, Ni, Cd, Fe, and Cr) was on the higher sid...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Quantitative risk analysis of sediment heavy metals using the positive matrix factorization-based ecological risk index method: a case of the Kuye River, China
In this study, ecological risks resulting from different pollution sources were evaluated using an integrated method combining the positive matrix factorization (PMF) and the potential ecological risk index (RI) model. A total of 59 sediment samples were collected from the Kuye River and analyzed for eight HMs (Zn, Cr, Ni, Cu, Pb, As, Cd, and Hg). The obtained results showed that the sediment HM contents were higher than the corresponding soil background values in Shaanxi Province. The average sediment Hg content was 3.42 times higher than the corresponding background value. The PMF results indicated that HMs in the sedime...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Multiple potentially toxic elements in urban gardens from a Brazilian industrialized city
In this study, the concentration of PTEs (As, Ba, Cd, Co, Cu, Cr, Ni, Mo, Pb, Sb, Se, V and Zn) was evaluated by soil (n = 85) and soil amendments (n = 19) in urban gardens from this municipality. Only barium was above regulatory limits in agricultural soil ranging from 20 to 112 mg kg−1. Geochemical indexes (Igeo, Cf andEr) revealed moderate to severe pollution for As, Ba, Cr, Cu, Pb Se and Zn, especialy in Capuava petrochemical complex gardens. A multivariate statistical approach discriminated Capuava gardens from the others and correlated As, Cr and V as main factors of pollution. However, carcinogenic and n...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Modeling the feasibility of Se-rich corn cultivation in Se-deficient agricultural fields using random forest algorithm
In this study, we explore the factors influencing the Se bioaccumulation coefficient in corn based on a land quality geochemical survey at a 1:50,000 scale and establish predictive models for corn seed Se content using random forest and multiple linear regression approaches. The results indicate that the surface soil in the study area is deficient in Se (0.18 –1.21 mg/kg), but 54% of the corn grain samples met the standards for Se-rich products (0.02–0.30 mg/kg). The factors influencing the Se biological enrichment coefficient in corn seeds are soil pH and CaO and MgO content, with impact levels of 0.54, 0.42, and 0....
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Evaluation of non-cancer risk owing to groundwater fluoride and iron in a semi-arid region near the Indo-Bangladesh international frontier
AbstractGroundwater quality in Hili, a semi-arid border region at Indo-Bangladesh border, was investigated in the post-monsoon season of 2021, succeeded by assessment of probabilistic health risk arising from fluoride (F−) and iron (Fe) intake, with the hypothesis that groundwater quality of the region was not satisfactory for human consumption and health, considering earlier reports on high groundwater F− and Fe in few of the neighboring districts. All water samples were found to be potable in terms of Ca2+, Mg2+, Cl−, SO42 − and  NO3−, ,  but F− and Fe exceeded prescribed safe limits for drinking water in a...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Potentially toxic metals in seawater, sediment and seaweeds: bioaccumulation, ecological and human health risk assessment
This study assesses the bioaccumulation, ecological, and health risks associated with potentially toxic metals (PTMs), including Pb, Hg, Cd, As, and Cr in Hare Island, Thoothukudi. The results revealed that the concentration of PTMs in sediment, seawater, andS. wightii ranged from 0.095 to 2.81  mg kg−1, 0.017 to 1.515  mg L−1, and 0.076 to 5.713  mg kg−1, respectively. The highest concentrations of PTMs were found in theS. wightii compared to seawater and sediment. The high bioaccumulation of Hg and As inS. wightii suggests that it can be used as a bioindicator for these elements in this region. The ecological...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

A response surface model to examine the reactive red 239 sorption behaviors on Rhizoclonium hieroglyphicum: isotherms, kinetics, thermodynamics and toxicity analyses
AbstractThe present study is an attempt to investigate the potentiality ofRhizoclonium hieroglyphicum in the removal of reactive red 239 (RR239) from aqueous solution and to assess the toxicity of the treated dye solution. Optimisation of the process variables namely dye and biosorbent concentrations, pH, temperature and incubation time for RR239 removal was performed using Response Surface Methodology (RSM) assisted Box Behnken Design (BBD) model. The recycling and regeneration efficiency of the dye adsorbed alga was evaluated using different eluents under optimized conditions. Further to understand the adsorption mechani...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Synthesis of iron oxide nanoparticles using orange fruit peel extract for efficient remediation of dye pollutant in wastewater
In conclusion, Fe2O3 NPs can efficiently purify water and suppress pathogens due to their strong degrading activity, reusability, and biofilm inhibition  property.Graphical abstract (Source: Environmental Geochemistry and Health)
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Investigating the temporal dynamics of sub-micron particles and particle-bound transition metals in indoor air of a metropolitan city
AbstractThe present study portrays an association between particle-bound transition metals and children's health. The indoor air quality of the urban metropolitan city households was monitored for four PM sizes, namely PM1.0 –2.5, PM0.50 –1.0, PM0.25 –0.50 and PM<0.25, in major seasons observed in the city; summer and winter. Further transition/heavy metals, viz. Cr, Cu, Fe, Mn, Ni, Pb and Zn, were analysed in PM1-2.5 samples. In order to evaluate the effect, health risk assessment was performed using mathematical and computational model for assessing dermal exposure and dose estimation (multiple path particle dos...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Study on the removal of fulvic acid in water by potassium ferrate-enhanced iron –manganese co-oxide film and its mechanism
In this study, the removal of fulvic acid (FA) was explored by adding potassium ferrate (K2FeO4) to heighten the catalytic activity of MeOx. After adding about 3.0  mg/L potassium ferrate, the elimination efficiency of 7.0 mg/L FA by the MeOx increased from 20 to 50%. The effects of temperature and ammonium on the elimination of FA were investigated. Higher temperature (above 22  °C) and higher ammonium concentration (above 2.0 mg/L) caused a decrease in FA removal. Most of FA combined with the ferric hydroxide colloid produced by K2FeO4 in water to form macromolecular groups, and they were subsequently absorbed and c...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Seasonal variations in the distribution of aliphatic hydrocarbons in surface sediments from the Selangor River, Peninsular Malaysia's West Coast
AbstractThe seasonal variation of petroleum pollution includingn-alkanes in surface sediments of the Selangor River in Malaysia during all four climatic seasons was investigated using GC –MS. The concentrations ofn-alkanes in the sediment samples did not significantly correlate with TOC (r = 0.34,p >  0.05). The concentrations of the 29n-alkanes in the Selangor River ranged from 967 to 3711 µg g-1 dw, with higher concentrations detected during the dry season. The overall mean per cent of grain-sized particles in the Selangor River was 85.9 ± 2.85% sand, 13.5 ± 2.8% clay, and 0.59 ± 0.34% grave...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Effect of red and blue light supplementation on the efficacy of Noccaea caerulescens in decontaminating metals and alleviating leaching risk
This study was conducted to investigate the impact of supplementing blue and red light on the biomass yield, metal uptake, contaminant purification, and the alleviation of leaching risks byNoccaea caerulescens, a well-known hyperaccumulator of Cd and Zn. As previously reported for the closely relatedThlaspi arvense,N. caerulescens retarded the leaching of Cd and Zn but aggravated the leaching of Pb and Cu, because the species mobilized all metals in soil but only extracted Cd and Zn. Monochromic red light reduced the leaching of Pb and Cu by 13.8% and 1.3%, respectively, but simultaneously weakened Cd phytoremediation by r...
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research

Fostering plant growth performance under drought stress using rhizospheric microbes, their gene editing, and biochar
This article also discusses CRISPR/Cas9-modifiable genes, increase plant ’s effectiveness in drought conditions, and increase plant resistance to drought stress. With an eco-friendly approach in mind, there is a need for practical management techniques having potential prospects based on an integrated strategy mediated by CRISPR-Cas9 editing, PGPR, which may alleviate the effects of drought stress in crops and aid in achieving the United Nation Sustainable Development Goals (UN-SDGs-2030). (Source: Environmental Geochemistry and Health)
Source: Environmental Geochemistry and Health - January 16, 2024 Category: Environmental Health Source Type: research