Correlation of Arsenic Gas with Subsurface Temperature to Determine a Heat Source on “U” Geothermal System

Taufiq, Taufiq; Atmojo, Jatmiko Prio; Raharjo, S. Budi; Maharani, M.; Mujihardi, Bambang; Rozaq, K.

doi:10.3997/2214-4609.202113265

Cited by 2 publications

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“…However, as their exploitation deepens, associated environmental concerns have progressively come to the fore. Among these, the pervasive presence of arsenic emerges as an issue that cannot be overlooked: numerous studies have shown that arsenic concentrations in geothermal hot springs far exceed safety standards, and prolonged exposure can pose a severe threat to human health [4][5] . More critically, the migration and accumulation of arsenic have led to groundwater contamination in certain areas, compromising drinking water safety for local inhabitants and irreversibly impacting the local ecology [6][7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

“…The concentration of arsenic in geothermal systems results from the interplay of multiple factors. On one hand, temperatures ranging from 150-250°C facilitate the mobilization of arsenic from rocks and minerals to geothermal uids, whereas excessively high temperatures might release toxic arsenic [5,[12][13] . Moreover, arsenic concentrations are typically higher in deep neutral chloride waters compared to shallow acidic sulfate waters.…”

Section: Introductionmentioning

confidence: 99%

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Forms and Sources of Arsenic in the Groundwater of the Northeastern Tectonic Active Zone of the Qinghai-Tibet Plateau

FENG,

ZHANG,

ZHAO

et al. 2024

Preprint

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High-altitude tectonic zones are active areas for geothermal groundwater, and the elevated arsenic content within them has emerged as a significant resource and environmental concern. This study selected the Gonghe-Guide Basin in the northeastern Qinghai-Tibet Plateau as the subject of investigation, employing field tests of geothermal water samples, hydrochemistry, thermodynamic simulations, and statistical methods to explore the forms, distribution, and sources of arsenic in geothermal groundwater. The research data indicates that the geothermal groundwater in the area displays weak alkalinity, medium to high mineralization, with the primary hydrochemical types being SO4-Cl·Na and Cl·Na. Arsenic concentration shows a significant negative correlation with Cl− and a positive correlation with water temperature and DO. Thermodynamic simulations suggest that the predominant form of arsenic is As5+. Rock weathering, evaporative concentration, and ion-exchange adsorption collectively shape the hydrochemical characteristics of the study area, laying the environmental groundwork for the formation and migration of arsenic. Notably, the ion-exchange between sodium ions and calcium and magnesium ions significantly impacts the arsenic concentration. This study provides insights into the behavior, forms, and origins of arsenic in geothermal groundwater and offers a reference for similar research in other geothermally active regions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Forms and Sources of Arsenic in the Groundwater of the Northeastern Tectonic Active Zone of the Qinghai-Tibet Plateau

FENG,

ZHANG,

ZHAO

et al. 2024

Preprint

View full text Add to dashboard Cite

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Arsenic in the Tibetan Plateau’s geothermal systems: a detailed analysis of forms, sources, and geochemical behaviors

Shi,

Feng,

Zhang

et al. 2024

Discov Appl Sci

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In high-altitude tectonic regions, significant geothermal activity influences groundwater arsenic levels, presenting crucial resource and environmental challenges. The present study examines the Gonghe-Guide Basin located in the northeastern region of the Qinghai-Tibet Plateau. The study employs a comprehensive approach encompassing field sampling, hydrochemical analysis, thermodynamic modeling, and statistical analysis to ascertain the composition and origins of arsenic in geothermal groundwater. The research data indicates that the geothermal groundwater in the area displays weak alkalinity and medium to high mineralization, with the principal hydrochemical types being SO4−Cl·Na and Cl·Na. The concentration of arsenic has a notable inverse relationship with Cl− and a positive correlation with water temperature and DO. According to thermodynamic calculations, the most common kind of arsenic is As5+. The hydrochemical properties of the research area are shaped by rock weathering, evaporative concentration, and ion-exchange adsorption working together. These factors contribute to the favorable circumstances for the formation and migration of arsenic throughout the environment. Notably, the ion-exchange between sodium ions and calcium and magnesium ions significantly impacts the arsenic concentration. This study marks the first discovery of a unique arsenic contamination pattern in geothermal groundwater within the Gonghe-Guide Basin in the northeastern Tibetan Plateau, revealing a positive correlation between arsenic levels, water temperature, and dissolved oxygen content. This provides a new perspective on understanding arsenic pollution in geothermal groundwater in high-altitude regions.

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Correlation of Arsenic Gas with Subsurface Temperature to Determine a Heat Source on “U” Geothermal System

Cited by 2 publications

References 0 publications

Forms and Sources of Arsenic in the Groundwater of the Northeastern Tectonic Active Zone of the Qinghai-Tibet Plateau

Forms and Sources of Arsenic in the Groundwater of the Northeastern Tectonic Active Zone of the Qinghai-Tibet Plateau

Arsenic in the Tibetan Plateau’s geothermal systems: a detailed analysis of forms, sources, and geochemical behaviors

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