Impact of Iron Minerals on Nitrate Reduction in the Lake–Groundwater Interaction Zone of High-Salinity Environment DOI Open Access
Zhen Wang,

Yuyu Wan,

Zhe Ma

et al.

Water, Journal Year: 2025, Volume and Issue: 17(9), P. 1241 - 1241

Published: April 22, 2025

Nitrate is the most prevalent inorganic pollutant in aquatic environments, posing a significant threat to human health and ecological environment, especially lakes groundwater, which are located high agricultural activity intensity areas. In order reveal sources of nitrogen pollution this study transformation mechanism interaction zone between groundwater has become an important foundation for prevention control. The coupling effect biogeochemical processes nitrate iron been pointed out be widely present various water environments recent years. However, impact minerals on reduction lake–groundwater high-salinity environment still remains uncertain. Based sediment chemistry characteristics Chagan Lake–groundwater northeastern China (groundwater TDS: 420~530 mg/L, Na+: 180~200 Cl−: 15~20 mg/L lake 470~500 210~240 71.40~87.09 mg/L), simulated relative oxidizing open system conditions reducing closed investigate hematite siderite effects microbial behavior. results indicated that both promoted system, whereas only system. Microbial community analysis significantly functional bacterial proliferation restructured composition by serving as electron donors/acceptors. systems, addition preferentially enriched Geobacter (denitrification, +15% abundance) Burkholderiales (DNRA, +12% abundance), while fostered distinct iron-carbon coupled metabolic network through Sphingomonas enrichment (+48% secretes organic acids enhance dissolution. These shifts accelerated Fe(II)/Fe(III) cycling rates 37% achieved efficient removal via combined denitrification DNRA pathways. Notably, with amendment demonstrated highest efficiency (80.6%). This reveals play critical role regulating pathways within salinized interfaces, thereby influencing microbially mediated redox processes.

Language: Английский

Microbially mediated iron redox processes for carbon and nitrogen removal from wastewater: Recent advances DOI
Qing Xia,

Qingzhen Qiu,

Jun Cheng

et al.

Bioresource Technology, Journal Year: 2025, Volume and Issue: 419, P. 132041 - 132041

Published: Jan. 5, 2025

Language: Английский

Citations

0
Dual Role of Organic Matter in Feammox-driven Nitrogen and Phosphate Removal DOI Creative Commons
Yi Liu, Jiahong Dong, Xiaohui Cheng

et al.

Water Research X, Journal Year: 2025, Volume and Issue: 27, P. 100312 - 100312

Published: Feb. 4, 2025

Feammox is a novel microbial process that enables simultaneous nitrogen and phosphorus removal in wastewater treatment. This study investigated the role of organic matter Feammox-driven nutrient during long-term bioreactor operation by gradually increasing influent chemical oxygen demand (COD) concentration from 0 to 50, then 100 mg/L. The results revealed ammonium efficiency was reduced 60.5 % 20.7 with COD In contrast, enhanced nitrate through heterotrophic denitrification, which outcompeted nitrate-dependent Fe(II) oxidation. Phosphorus increased up approximately 90 via Fe(II)-mediated precipitation, forming vivianite crystals, evidenced X-ray diffraction analysis. Continuous addition Fe(III) alleviated inhibitory effect on ammonia oxidation serving as an alternative electron acceptor, reducing competition. Therefore, optimizing levels ensuring sufficient availability are crucial for achieving efficient systems, particularly treating low carbon/nitrogen ratio.

Language: Английский

Citations

0
Ferrihydrite enhance performance in anaerobic digestion of pig manure: Methane production, Feammox and metabolic pathway DOI
Yukai Zheng,

J. Wang,

Xiaojun Niu

et al.

Journal of Water Process Engineering, Journal Year: 2025, Volume and Issue: 72, P. 107621 - 107621

Published: April 1, 2025

Language: Английский

Citations

0
Impact of Iron Minerals on Nitrate Reduction in the Lake–Groundwater Interaction Zone of High-Salinity Environment DOI Open Access
Zhen Wang,

Yuyu Wan,

Zhe Ma

et al.

Water, Journal Year: 2025, Volume and Issue: 17(9), P. 1241 - 1241

Published: April 22, 2025

Nitrate is the most prevalent inorganic pollutant in aquatic environments, posing a significant threat to human health and ecological environment, especially lakes groundwater, which are located high agricultural activity intensity areas. In order reveal sources of nitrogen pollution this study transformation mechanism interaction zone between groundwater has become an important foundation for prevention control. The coupling effect biogeochemical processes nitrate iron been pointed out be widely present various water environments recent years. However, impact minerals on reduction lake–groundwater high-salinity environment still remains uncertain. Based sediment chemistry characteristics Chagan Lake–groundwater northeastern China (groundwater TDS: 420~530 mg/L, Na+: 180~200 Cl−: 15~20 mg/L lake 470~500 210~240 71.40~87.09 mg/L), simulated relative oxidizing open system conditions reducing closed investigate hematite siderite effects microbial behavior. results indicated that both promoted system, whereas only system. Microbial community analysis significantly functional bacterial proliferation restructured composition by serving as electron donors/acceptors. systems, addition preferentially enriched Geobacter (denitrification, +15% abundance) Burkholderiales (DNRA, +12% abundance), while fostered distinct iron-carbon coupled metabolic network through Sphingomonas enrichment (+48% secretes organic acids enhance dissolution. These shifts accelerated Fe(II)/Fe(III) cycling rates 37% achieved efficient removal via combined denitrification DNRA pathways. Notably, with amendment demonstrated highest efficiency (80.6%). This reveals play critical role regulating pathways within salinized interfaces, thereby influencing microbially mediated redox processes.

Language: Английский

Citations

0