Hydrogeochemistry, Water Quality, and Health Risk Analysis of Phreatic Groundwater in the Urban Area of Yibin City, Southwestern China DOI Open Access

Xiangchuan Wu,

Jinhai Yu, Shiming Yang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(24), P. 3599 - 3599

Published: Dec. 13, 2024

With rapid urbanization, intensified agricultural activities, and industrialization, groundwater resources are increasingly threatened by pollution. Industrial wastewater discharge the extensive use of fertilizers in particular, have had substantial impacts on quality. This study examines 18 samples collected from main urban area Yibin City to assess hydrochemical characteristics, spatial distribution, source attribution, water quality, human health risks. Statistical analysis reveals significant exceedances TDS, NO3−, Mn, As levels groundwater, with elevated concentrations B as well. Isotopic identifies atmospheric rainfall primary recharge for area, water–rock interactions limestone dissolution playing key roles shaping its chemical composition. Applying Entropy-Weighted Water Quality Index (EWQI) a comprehensive quality assessment, found that 94.44% were rated “good”, indicating relatively high overall Deterministic risk assessments indicate 72.22% non-carcinogenic risks below threshold 1, while 66.67% carcinogenic 1.00 × 10−4. Monte Carlo simulations produced similar results, reinforcing reliability assessment. Although area’s is generally good, persists, underscoring need ensure safety drinking household local residents. provides valuable reference rational management remediation resources.

Language: Английский

Simultaneous Nitrification–Endogenous Denitrification with Phosphorus Removal Sustained by Aeration-Free Filamentous Microalgal–Bacterial Granular Sludge for Low C/N Wastewater Treatment DOI

Liaofan Tang,

Yu-Qing Zhang, Mingming Gao

et al.

ACS ES&T Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

The innovative and carbon-neutral phototrophic simultaneous nitrification–endogenous denitrification with phosphorus removal (P-SNDPR) process presents significant advantages for low C/N wastewater treatment. Effective implementation of SNDPR relies on establishing anoxic zones during light-aerobic stages, which poses challenges in suspended sludge systems. Microalgal–bacterial granular (MBGS) may address these due to its biological chemical stratified microniches, although the granulation, structure, performance MBGS under aeration-free conditions remain unreported. This study successfully cultivated filamentous a distinct oxygen gradient microbial stratification within landscape. Filamentous cyanobacteria (f_Leptolyngbyaceae) functional genera responsible nutrient granulation (Acinetobacter, Candidatus Competibacter, Zoogloea, Flavobacterium, Hydrogenophaga) were enriched. had high efficiencies COD (92.9 ± 1.2%), NH4–N (95.0 0.7%), TN (83.8 1.4%), PO4–P (96.8 0.9%) an aerobic SND efficiency 77.8 2.7%. Typical cycle batch tests demonstrated that achieved efficient SNDPR. Mass balance calculations indicated most removed carbon (76.0%) (97.6%) converted biomass. MBGS-SNDPR established synergistic pathway carbon, nitrogen, metabolism, suggesting potential applications sustainable

Language: Английский

Citations

0
History of carbon supply shapes the metabolic response of photogranules to light shifts DOI Creative Commons

Oriane Della-Negra,

Anaïs Séguéla,

Camille Guilmineau

et al.

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123557 - 123557

Published: March 1, 2025

Oxygenic photogranules mainly composed of cyanobacteria and heterotrophic bacteria, have gained attention for their ability to treat wastewater (removal C, N, P) without external aeration. Currently, the metabolic dynamics varying nutrient light conditions in treatment systems remains poorly studied. However, understanding how quickly photogranule metabolism changes, whether this change is temporary or permanent important optimal use photogranules. Here, an NMR-based metabolomics approach was applied investigate temporal presence absence acetate with light. Our findings revealed that under carbon-limited conditions, relied on alternative carbon sources, such as N-acetylneuraminate (a constituent EPS) amino acids like hypotaurine L-alanine. This adaptation affected key pathways, including glycolysis, taurine metabolism, tricarboxylic acid cycle. When provided, both phototrophic activities were maintained. Notably, history supply influenced responded shifts. Metabolic indicators showed lag addition altered fatty fixation, leading shifts concentrations distinct profiles when turned off. Thus, NMR identified induced by contrasting lasting several hours, significantly affecting response fluctuations. These results suggest supplementation may shape responses other environmental changes stressors.

Language: Английский

Citations

0
Cyanobacterial biofilms: from natural systems to applications DOI Creative Commons
Mahir Bozan,

Hannah Berreth,

Pia Lindberg

et al.

Trends in biotechnology, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Cyanobacteria are the ancestors of oxygenic photosynthesis. Fueled by light and water, their ability to reduce CO

Language: Английский

Citations

1
Source Apportionment and Human Health Risks of Potentially Toxic Elements in the Surface Water of Coal Mining Areas DOI Creative Commons
Yuting Yan, Yunhui Zhang, Zhan Xie

et al.

Toxics, Journal Year: 2024, Volume and Issue: 12(9), P. 673 - 673

Published: Sept. 15, 2024

Contamination with potentially toxic elements (PTEs) frequently occurs in surface water coal mining areas. This study analyzed 34 samples collected from the Yunnan–Guizhou Plateau for their hydrochemical characteristics, spatial distribution, source apportionment, and human health risks. Our statistical analysis showed that average concentrations of PTEs ranked as follows: Fe > Al Zn Mn Ba B> Ni Li Cd Mo Cu Co Hg Se As Pb Sb. The revealed high Fe, Al, were predominantly distributed main stream, Xichong River, Yangchang River. Positive matrix factorization (PMF) identified four sources water. Hg, As, originated wastewater discharged by preparation plants mines. Mo, Li, B dissolution clay minerals seams. Elevated Cu, Mn, Co, attributed to kaolinite, illite, chalcopyrite, pyrite, associated Cd, Zn, derived melting traffic release. deterministic risks assessment 94.12% presented non-carcinogenic below limit 1. Meanwhile, 73.56% elevated posed level III carcinogenic risk local populations. Special attention drinking safety children is warranted due lower metabolic capacity detoxifying PTEs. provides insight PTE management sustainable environments.

Language: Английский

Citations

1
Enhancing photosynthesis of microalgae via photoluminescent g-C3N4 accelerated photoelectrons transfer in photosystem DOI

Mei Xue,

Zhiwen Ma,

Yali Pan

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 499, P. 156424 - 156424

Published: Oct. 11, 2024

Language: Английский

Citations

0
Hydrogeochemistry, Water Quality, and Health Risk Analysis of Phreatic Groundwater in the Urban Area of Yibin City, Southwestern China DOI Open Access

Xiangchuan Wu,

Jinhai Yu, Shiming Yang

et al.

Water, Journal Year: 2024, Volume and Issue: 16(24), P. 3599 - 3599

Published: Dec. 13, 2024

With rapid urbanization, intensified agricultural activities, and industrialization, groundwater resources are increasingly threatened by pollution. Industrial wastewater discharge the extensive use of fertilizers in particular, have had substantial impacts on quality. This study examines 18 samples collected from main urban area Yibin City to assess hydrochemical characteristics, spatial distribution, source attribution, water quality, human health risks. Statistical analysis reveals significant exceedances TDS, NO3−, Mn, As levels groundwater, with elevated concentrations B as well. Isotopic identifies atmospheric rainfall primary recharge for area, water–rock interactions limestone dissolution playing key roles shaping its chemical composition. Applying Entropy-Weighted Water Quality Index (EWQI) a comprehensive quality assessment, found that 94.44% were rated “good”, indicating relatively high overall Deterministic risk assessments indicate 72.22% non-carcinogenic risks below threshold 1, while 66.67% carcinogenic 1.00 × 10−4. Monte Carlo simulations produced similar results, reinforcing reliability assessment. Although area’s is generally good, persists, underscoring need ensure safety drinking household local residents. provides valuable reference rational management remediation resources.

Language: Английский

Citations

0