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Removal of arsenic from jarosite waste using hydrometallurgical treatment
This study tried to recover arsenic from jarosite waste using hydrometallurgical treatment. The comprehensive characterization of jarosite samples was performed using various analytical techniques, including X-ray diffraction (XRD), Fourier transform Infrared (FTIR), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX), and it was characterized as natrojarosite. For optimal removal of arsenic, the response surface methodology (RSM) was applied with the key factors, including dosage (A), time (B), temperature (C), and acid concentration (D) on the recovery of arsenic. The results indicated that...
Source: Environmental Geochemistry and Health - February 11, 2024 Category: Environmental Health Source Type: research

Assessment of NORMs (238U, 232Th, 40K) and radiation hazard indices in Beldih apatite mine region of Purulia district, West Bengal, India
This study is primarily focused on the determination of238U,232Th and40K activities in the sub-surface soil of the study area. The measurements were carried out using a High Purity Germanium (HPGe) detector-based gamma-ray spectrometer with a relative efficiency of 80%. To achieve uniformity in exposure estimations, radium equivalent activity has been calculated. Additionally, the internal hazard index, external hazard index, radioactivity level index and gamma dose rates have been evaluated to estimate the radiation hazard levels in the study area. The comparison of obtained concentrations and hazard indices with global d...
Source: Environmental Geochemistry and Health - February 8, 2024 Category: Environmental Health Source Type: research

Rice-based integrated farming system improves the soil quality, bacterial community structure and system productivity under sub-humid tropical condition
AbstractRice-based integrated farming system improves the productivity and profitability by recycling resources efficiently. In the sub-humid tropics, rice production without sufficient nutrient replenishment often leads to soil health and fertility degradation. There has been very limited research on soil health and fertility after adopting a multi-enterprising rice-based integrated farming system (IFS), notably in the rice-fish-livestock and agroforestry system, when compared to a conventional farming system (CS). Therefore, the present study analyzed the dynamics of soil properties, soil bacterial community structure an...
Source: Environmental Geochemistry and Health - February 7, 2024 Category: Environmental Health Source Type: research

Insights on hazardous metal bioaccessibility, and groundwater impacted by Zn residues from a legacy mine and risk evaluation of adjacent soils
This study explored the legacy impact of Zinc plant residues (ZPRs) in Kabwe, Zambia, on the environment and human health, particularly in light of the town's reputation for Pb pollution. ZPRs solid samples and groundwater within and around ZPRs zone were collected from the legacy mine, along with soils in a 10  km radius from the mine site. Bioaccessible fractions of Pb and Zn were elucidated by Japanese leaching test (JLT) and simple bioaccessibility extraction test (SBET). Cationic speciation of Pb and Zn from inhalable and ingestible ZPRs particles was investigated via sequential extraction. Groundwat er in the ZPRs a...
Source: Environmental Geochemistry and Health - February 6, 2024 Category: Environmental Health Source Type: research

Effect of experimental boundary conditions and treatment-time on the electro-desalination of soils
This study investigates the effect of boundary conditions and treatment-time on the electro-desalination of artificially-contaminated soil. The effect of ion exchange membranes (IEM), calcium chloride (CaCl2), and ethylenediaminetetraacetic acid (EDTA)  on the removal of salt (i.e., Na+, Cl−, and Ca2+) and metal (i.e., Co2+ and Fe2+) ions from the soil by electrokinetic (EK) was studied. The outcomes demonstrate that an increase in treatment-time decreases the electroosmosis and ion removal rate, which might be attributed to the formation of acid –base fronts in soil, except in the IEM case. Because a high pH jump and...
Source: Environmental Geochemistry and Health - February 1, 2024 Category: Environmental Health Source Type: research

Risk assessment of heavy metals in agricultural soil based on the coupling model of Monte Carlo simulation-triangular fuzzy number
In this study, heavy metals (As, Cd, Cr, Cu, Ni, Pb, and Zn) in agricultural soil samples from mining areas were analyzed to explore pollution status, bioavailability, potential sources, and ecological/health risks. Particularly, the coupling model of Monte Carlo simulation-triangular fuzzy number (MCS-TFN) was established to quantify ecological/health risks accurately. Results showed that Cd was heavily enriched in soil and had the highest bioavailability based on both geo-accumulation index (Igeo) and chemical speciation analysis. Pollution sources apportioned with the absolute principal component score-multiple linear r...
Source: Environmental Geochemistry and Health - January 31, 2024 Category: Environmental Health Source Type: research

The changes and correlation of IL-6 and oxidative stress levels in RAW264.7 macrophage cells induced by PAHs in PM2.5
The objective of this study was to investigate the effects of anthracene (Ant) with 3 rings, benzo[a]anthracene (BaA) with 4 rings and benzo[b]fluoranthene (BbF) with 5 rings in fine particulate matter (PM2.5) at different exposure times (4  h and 24 h) and low exposure levels (0 pg/mL, 0.1 pg/mL, 1 pg/mL, 100 pg/mL and 10,000 pg/mL) on RAW264.7 cells. The changes of interleukin-6 (IL-6) and oxidative stress levels in RAW264.7 cells were investigated by methyl-thiazolyl-tetrazolium (MTT) and enzyme-linked immunosorbent assay (EL ISA). Pearson correlation analysis was used to analyze the correlation between variables...
Source: Environmental Geochemistry and Health - January 28, 2024 Category: Environmental Health Source Type: research

Identifying sources of acid mine drainage and major hydrogeochemical processes in abandoned mine adits (Southeast Shaanxi, China)
In this study, water and sediment samples from typical mine adits were selected to investigate the hydrogeochemical characteristics and assess the environmental impacts of AMD. The interactions between coexisting chemical factors, geochemical processes in the mine adit, and the causes of AMD formation are discussed based on statistical analysis, mineralogical analysis, and geochemical modeling. The results showed that the hydrochemical types of AMD consisted of SO4–Ca–Mg, SO4–Ca, and SO4–Mg, with low pH and extremely high concentrations of Fe and SO42 –. The release behaviors of most heavy metals are controlled b...
Source: Environmental Geochemistry and Health - January 27, 2024 Category: Environmental Health Source Type: research

Source-oriented risk assessment of heavy metal(loid)s in agricultural soils around a multimetal smelting area near the Yellow River, China
In this study, agricultural soils were collected in a flourishing multimetal smelting area near the Yellow River in central China. By an integrated approach encompassing the positive matrix factorization model, ordinary kriging interpolation and hierarchical clustering analysis (PMF-OK-HC), a total of four major sources and their mass contributions were identified, namely, soil parent material (56.6%), industrial waste and Mo smelting (24.0%), metal smelting and traffic emissions (12.8%), and coal combustion (6.7%). On this basis, the health risk of HMs was evaluated by Monte Carlo simulations and showed that a higher risk...
Source: Environmental Geochemistry and Health - January 27, 2024 Category: Environmental Health Source Type: research

Heavy metals contamination and ecological risks in agricultural soils of U şak, western Türkiye: a geostatistical and multivariate analysis
AbstractThis research aimed to determine and evaluate the concentrations of  As, Cu, Hg, Ni, and Pb, and the physicochemical properties of 48 agricultural soil samples, to identify potential ecological risks and their sources associated with heavy metals contamination in Usak, western Türkiye. Various methods were used to assess ecological risks, including geoaccumulation index (Igeo), enrichment factor (EF), degree of contamination (Cdeg), potential ecological risk (RI), and pollution load index (PLI). The heavy metals concentrations ranged from 4 to 61  mg/kg for As, 8–48 mg/kg for Cu, 0.01–0.06 mg/kg for Hg, 30...
Source: Environmental Geochemistry and Health - January 26, 2024 Category: Environmental Health Source Type: research

Multi-model exploration of groundwater quality and potential health risk assessment in Jajpur district, Eastern India
AbstractThe presence of fluoride and nitrate is a serious groundwater quality issue in India impacting human health. In the present study, 14 different hydrochemical parameters for 76 groundwater samples collected from the Jajpur district of Odisha, India, were evaluated. Entropy-weighted water quality index (EWQI), fixed-weight groundwater quality index (GWQI), principal component analysis (PCA), and rotated factor loading-based water quality index (PCWQI) were employed to assess groundwater quality. About 65.79  ± 4.68%, 33.55 ± 3.95%, and 0.66 ± 0.76% of the samples were rated as “excellent,” “good,...
Source: Environmental Geochemistry and Health - January 25, 2024 Category: Environmental Health Source Type: research

Contamination level, spatial distribution, and sources of potentially toxic elements in indoor settled household dusts in Tehran, Iran
In this study, 31 indoor dust samples were collected passively from residential and commercial buildings located in the central and densely populated districts of the city. These samples were analyzed after preparation to measure the concentration of elements (As, Be, Cd, Co, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, Se, Sr, V, Zn). Statistical data analyses were employed to compare their relationship across various uses, variations, and for source identification. Geochemical indices of contamination factor (CF) and pollution load index (PLI) were utilized to evaluate the degree of contamination. The mean concentrations of Zn, Cu, a...
Source: Environmental Geochemistry and Health - January 25, 2024 Category: Environmental Health Source Type: research

Pollution and source-specific risk analysis of potentially toxic metals in urban soils of an oasis-tourist city in northwest China
This study highlights the source-specific ecological and human health effects of PTMs pollution in urban soils, thereby providing valuable information for targeted pollution control and priority source management. (Source: Environmental Geochemistry and Health)
Source: Environmental Geochemistry and Health - January 23, 2024 Category: Environmental Health Source Type: research

Bromide induced the formation of brominated halonitromethanes from aspartic acid in the UV/chlorine disinfection process
AbstractBrominated halonitromethanes (Br-HNMs) are generated in water disinfection processes and present high toxicity to human health. This work used aspartic acid (ASP) as the precursor to reveal that bromide (Br−) induced the production of Br-HNMs in the UV/chlorine disinfection process. Consequently, six Br-HNMs were identified, and their yields presented an increasing and then declining evolution over the reaction time from 0 to 15 min. Also, the total Br-HNMs yield reached the maximum of 251.1  μg L−1 at 5 min and then declined to 107.1  μg L−1. The total Br-HNMs yield increased from 2.40 to 251.14  μg�...
Source: Environmental Geochemistry and Health - January 22, 2024 Category: Environmental Health Source Type: research

Groundwater quality assessment for drinking purpose using traditional and fuzzy-GIS-based water quality index in Gurugram District of Haryana, India
In conclusion, this study finds that FGQI effectively assesses the groundwater quality in the region better than GWQI. (Source: Environmental Geochemistry and Health)
Source: Environmental Geochemistry and Health - January 20, 2024 Category: Environmental Health Source Type: research