Controls of Mineral Solubility on Adsorption-Induced Molecular Fractionation of Dissolved Organic Matter Revealed by 21 T FT-ICR MS

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(5), P. 2313 - 2322

Published: Jan. 24, 2024

Mineral adsorption-induced molecular fractionation of dissolved organic matter (DOM) affects the composition both DOM and OM adsorbed thus stabilized by minerals. However, it remains unclear what mineral properties control magnitude fractionation. Using a combined technique approach that leverages identified ultrahigh resolution 21 T Fourier transform ion cyclotron resonance mass spectrometry adsorption isotherms, we catalogue compositional differences occur at level results in due to Suwannee River fulvic acid on aluminum (Al) iron (Fe) oxides phyllosilicate (allophane) species contrasting properties. The minerals high solubility (i.e., amorphous Al oxide, boehmite, allophane) exhibited much stronger capabilities than low gibbsite Fe oxides). Specifically, former released Al3+ solution (0.05–0.35 mM) formed complexes with likely reduced surface hydrophobicity mineral-OM assemblage, increasing preference for adsorbing polar molecules. impacts are exacerbated fact interactions also enhance metal release from For sparsely soluble minerals, hydrophobicity, instead solubility, appeared be primary their power. Other chemical seemed less directly relevant fractionating DOM.

Language: Английский

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Evolution Mechanism of Arsenic Enrichment in Groundwater and Associated Health Risks in Southern Punjab, Pakistan

International Journal of Environmental Research and Public Health, Journal Year: 2022, Volume and Issue: 19(20), P. 13325 - 13325

Published: Oct. 15, 2022

Arsenic (As) contamination in groundwater is a worldwide concern for drinking water safety. Environmental changes and anthropogenic activities are making vulnerable Pakistan, especially Southern Punjab. This study explores the distribution, hydrogeochemical behavior, pathways of As enrichment discusses corresponding evolution mechanism, mobilization capability, health risks. In total, 510 samples were collected from three tehsils Punjab province Pakistan to analyze other physiochemical parameters. concentration averaged 14.0 μg/L Vehari, 11.0 Burewala, 13.0 Mailsi. Piper-plots indicated dominance Na+, SO42−, Ca2+, Mg2+ ions geochemical modeling showed negative saturation indices with calcium carbonate salt minerals, including aragonite (CaCO3), calcite dolomite (CaMg(CO3)2), halite (NaCl). The dissolution process hinted at their potential roles groundwater. These results further validated an inverse model calcium-bearing mineral, exchange cations between Ca2+ Na+ studied area. Risk assessment suggested carcinogenic risks (CR > 10−4) both children adults, whereas had significant non-carcinogenic risk hazard quotient (HQ 1). Accordingly, higher overall than adults. Groundwater Vehari Mailsi was Burewala. Our findings provide important baseline information provincial level, which essential initiating reduction. current also recommends efficient management strategies As-contaminated

Language: Английский

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Natural iron minerals in an electrocatalytic oxidation system and in situ pollutant removal in groundwater: Applications, mechanisms, and challenges

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 871, P. 161826 - 161826

Published: Jan. 26, 2023

Language: Английский

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Groundwater pollution and its remediation for sustainable water management

Chemosphere, Journal Year: 2023, Volume and Issue: 329, P. 138621 - 138621

Published: April 7, 2023

Language: Английский

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Activation of iron oxide minerals in an aquifer by humic acid to promote adsorption of organic molecules

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 356, P. 120543 - 120543

Published: March 12, 2024

Language: Английский

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Biogeochemistry of Iron Enrichment in Groundwater: An Indicator of Environmental Pollution and Its Management

Sustainability, Journal Year: 2022, Volume and Issue: 14(12), P. 7059 - 7059

Published: June 9, 2022

Iron (Fe) is one of the most biochemically active and widely distributed elements important for biota human activities. Fe plays roles in biological chemical processes. redox reactions groundwater have been attracting increasing attention geochemistry biogeochemistry fields. This study reviews recent research into biogeochemical enrichment processes, including reduction, biotic abiotic oxidation, adsorption, precipitation groundwater. water-bearing medium (aquifer) often involves transformation between Fe(II) Fe(III) caused by biochemical conditions system. Human activities anthropogenic pollutants strongly affect these conditions. Generally speaking, acidification, anoxia warming environments, as well inputs reducing pollutants, are beneficial to migration (Fe(III)→Fe(II)); conversely, it media (Fe(II)→Fe(III)). describes progress breakthroughs assesses groundwater, factors controlling reactivity, effects on environment. also implications managing importance monitoring evaluation, early pollution warnings.

Language: Английский

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DOM accumulation in the hyporheic zone promotes geogenic Fe mobility: A laboratory column study

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 896, P. 165140 - 165140

Published: June 28, 2023

Language: Английский

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Mechanisms of cadmium release from manganese-rich sediments driven by exogenous DOM and the role of microorganisms

Ecotoxicology and Environmental Safety, Journal Year: 2024, Volume and Issue: 274, P. 116237 - 116237

Published: March 18, 2024

Dissolved organic matter (DOM) is a crucial component of natural sediments that alters Cd sequestration. Nevertheless, how different types DOM fuel mobilization in Mn-rich has not been elucidated. In the present study, four typical DOM, fluvic acid (FA), bovine serum albumin (BSA), sodium alginate (SA), and dodecyl benzene sulfonate (SDBS), were used to amend Cd-contaminated sediment study their effects on Cd/Mn biotransformation microbial community response. The results demonstrated drive shifts enhance microbially mediated Mn oxide (MnO) reduction release. amendment terrestrial- anthropogenic-derived (FA SDBS) mainly contributed enriching Mn-reducing bacteria phylum Proteobacteria, its abundance increased by 38.16-74.47 % 56.41-73.98 %, respectively. Meanwhile, microbial-derived (BSA SA) stimulated abundances metal(loid)-resistant Firmicutes. Accompanied structure, diversity, co-occurrence network shifts, concentration oxidation-reduction potential changed, resulting enhanced mobilization. Importantly, FA release most remarkably, probably because decreased cooperative interactions between bacterial populations, stronger MnOs, higher aromaticity hydrophobicity after amendment. This linked functional communities, explored roles lake sediments.

Language: Английский

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Effect of Organic Matter on Iodine Migration and Transformation in Groundwater

Advances in Environmental Protection, Journal Year: 2025, Volume and Issue: 15(01), P. 38 - 43

Published: Jan. 1, 2025

Language: Английский

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Factors affecting iron and manganese dissolution in groundwater: treatments with simultaneous oxidation and precipitation methods

Environmental Technology, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 11

Published: Jan. 15, 2025

This study explores variations in groundwater (GW) pH, conductivity, ammonium, iron, and manganese parameters to reveal prospective interactions having an impact on the dissolved metal concentrations. To this end, bivariate partial correlation procedures were applied data obtain incisive evaluation. Besides characterisation efforts, photocatalytic iron removal experiments also carried out with Ni-doped TiO2 nano-composite thin films (TFs) real GW samples. UV-A (365 nm) An LED array was used as illumination source. The experimental setup based three treatment routes including oxidation (PCO), NaOH-aided precipitation PCO simultaneous (SPCO-P). main statistical analysis efforts have been performed samples of a single well, respectively (N = 15). However, extended has larger groups 1366) obtained from different sources well. Analytical results revealed that about 90% oxidised forms which do not precipitate by simple pH regulation. Statistical significant between concentrations observed depending level conductivity. Furthermore, SPCO-P strategy provided four-fold increase reaction rate (pseudo-first-order, kobs: 0.04 min−1). Removal efficiencies increased 10% 96% – 85%, respectively.

Language: Английский

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