Unraveling the Behavior of Stormwater Runoff at Interception Facilities: An Explicit Focus on Dissolved Organic Matter with Analytical Measurement DOI
Ziyu Lin, Juin Yau Lim, Adrian Chun Minh Loy

et al.

ACS ES&T Water, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

Interception facilities are essential for managing stormwater runoff before discharge into natural water bodies. This study examines quality and dissolved organic matter (DOM) characteristics under rain nonrain conditions using physicochemical analysis EEM-PARAFAC methods. Kernel PCA revealed that 76.88 71.46% of variance during conditions, respectively, were explained by the first two principal components. Rain-driven variability was influenced BOD, DO, EC, while DOM components such as BIX, pH, C3 critical periods. Two-dimensional correlation spectroscopy (2D-COS) indicated new production (C1) microbial humic-like substances (C2) dominated events, whereas led periods, followed tryptophan-like terrestrial components, obeying sequence C1 → C2 C4 Noda's rule. Scanning electron microscopy (SEM) showed suspended solids had most negative impact on (−0.90), fresh positively (FI: 0.94, BIX: 0.78), in contrast to recalcitrant humic (C4: −0.96). These findings underscore role interception mitigating pollutant loads, particularly nutrients, highlight their importance regulating dynamics across hydrological conditions.

Language: Английский

Identification of wastewater-specific peak on EEM and their application for detecting the effluent in the discharged area DOI Creative Commons
Kazuhiro Komatsu, Takashi Onodera, Kenji Tsuchiya

et al.

Water Research, Journal Year: 2025, Volume and Issue: unknown, P. 123213 - 123213

Published: Jan. 1, 2025

Excitation emission matrix (EEM) of fluorescence intensity has been often used to characterize dissolved organic matter in the aquatic environment. On EEM, there is a peak (Peak X) around excitation (emission) wavelengths 490 (520) nm that detected only municipal wastewater-related samples. Peak X reported very few papers. We investigated characteristics substances associated with from various perspectives. Based on information, we hypothesized was derived fluorescein. This hypothesis supported by results several estimates this study, and it revealed for first time EEM fluorescein contained colored bath salts widely Japan. quantify how effluent wastewater treatment plant (WWTP) dispersed outfall area evaluate its impact water quality area. By using X, shown influence WWTP discharged extended hundred meters. In other words, quantitatively demonstrated significantly contributed increase nutrient concentrations primary production. These findings are expected be highly useful control river effluent, which focus much attention recent years.

Language: Английский

Citations

1
Vertical Profile Characteristics of Dissolved Organic Matter Biochemistry in the Tropical Reservoir Shaped by Hydrodynamic Forces DOI Open Access

Z. Liu,

Miao Chen,

Huiran Liu

et al.

Water, Journal Year: 2025, Volume and Issue: 17(2), P. 203 - 203

Published: Jan. 14, 2025

Dissolved organic matter (DOM) exerts a crucial role in biogeochemical processes and ascertaining water quality reservoirs, where it is vulnerable to the dynamic impacts of surface inflows. However, understanding how DOM quantity biochemical features responds hydrodynamic forces tropical reservoirs remains limited. To enhance our vertical profiles characteristics under varying (strong, moderate, weak regions) Chitian Reservoir (18°43′–18°42′ N, 109°68′–109°70′ E), December 2023, we investigated concentrations column samples using multispectral techniques, parallel factor model, two-dimensional correlation analysis. Our results indicated that (4.34 ± 0.36 mg/L) are highest reservoir center, whereas total nitrogen (0.52 0.04 mg/L), phosphorus (0.02 0.03 nitrate (1.01 0.07 present their values inlet region. As force decreases, microbial activity increases, DOM’s humification degree molecular weight decline. comprises humic-like components, including three terrestrial sources (accounting for 85.38%~87.03%) one source, with dominant allochthonous origin. The relative abundance components decreased from 14.62% 12.97% increasing increased depth. functional groups strong region reservoir’s upper layer show high consistency uniformity. Phenolic O–H most reactive group concerning changes depth across all areas, followed by polysaccharide C–O, owing its photoactivity. In contrast, aromatic C–H demonstrates weakest reactivity. spectral closely linked nutrient form (N P).

Language: Английский

Citations

0
Effect of Artificial Humic Acids Derived from Municipal Sludge on Plant Growth, Soil Fertility, and Dissolved Organic Matter DOI Creative Commons

Rongting Ji,

Chenwei Liu,

Qiujin Xu

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(11), P. 1946 - 1946

Published: Oct. 31, 2024

Due to its high nutrient utilization efficiency, liquid organic fertilizer has become a research hotspot in the field of agricultural planting. Artificial humic acids, which are near-nature products, can be deemed as green fertilizer, but few studies have been reported, limited their further application. In this study, artificial acids were derived from municipal sludge, and effect on rice growth, soil fertility, dissolved matter was investigated using multi-chamber root box experiments. The shoot biomass significantly enhanced by heavy metal concentration within safe limits. limit decrease pH, especially far-rhizosphere zone, improve distribution nutrients rhizosphere, near-rhizosphere, zones. use led significant electrical conductivity. carbon content zone increased, fluorescence intensity rhizosphere increased. proportion specific components just slightly changed near-rhizosphere promoted humification findings indicate that environmental impact is different conventional chemical fertilizers, they show huge potential agriculture field.

Language: Английский

Citations

1
Characteristics of dissolved organic matter in water bodies during the dry season in the Huainan section of the Huaihe River Basin in Northern Anhui Province, China DOI Creative Commons
Kai Zhang,

Xiaoli Kai,

Liangmin Gao

et al.

Journal of Freshwater Ecology, Journal Year: 2024, Volume and Issue: 39(1)

Published: Nov. 6, 2024

This study investigated the spatial heterogeneity of dissolved organic matter (DOM) composition and characteristics in central reaches Huaihe River Basin. The dry season DOM content three river bodies (the main stream River, tributaries agricultural drainage ditches) Basin were studied using UV-Vis three-dimensional fluorescence spectroscopy combined with parallel factor analysis (EEMs-PARAFAC). degree humification relative molecular weight ditches significantly higher than those (p < 0.01), regarding autogenetic types water more strongly affected by exogenous interference stream. Three kinds chemical components determined PARAFAC mode(C1:terrsstrial humus-like;C2:tryptophan-like;C3:protein-like), protein-like fluorescent during season, proportion different systems exceeds 50%. Principal component (PCA) showed that intensity humus was closely related to TP(Total phosphorus) concentration Huainan section body season. absolute principal component-multiple linear regression model contribution nutrition C2 C3 greater, while had a greater effect on TP physicochemical index.

Language: Английский

Citations

1
Unraveling the Behavior of Stormwater Runoff at Interception Facilities: An Explicit Focus on Dissolved Organic Matter with Analytical Measurement DOI
Ziyu Lin, Juin Yau Lim, Adrian Chun Minh Loy

et al.

ACS ES&T Water, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 17, 2024

Interception facilities are essential for managing stormwater runoff before discharge into natural water bodies. This study examines quality and dissolved organic matter (DOM) characteristics under rain nonrain conditions using physicochemical analysis EEM-PARAFAC methods. Kernel PCA revealed that 76.88 71.46% of variance during conditions, respectively, were explained by the first two principal components. Rain-driven variability was influenced BOD, DO, EC, while DOM components such as BIX, pH, C3 critical periods. Two-dimensional correlation spectroscopy (2D-COS) indicated new production (C1) microbial humic-like substances (C2) dominated events, whereas led periods, followed tryptophan-like terrestrial components, obeying sequence C1 → C2 C4 Noda's rule. Scanning electron microscopy (SEM) showed suspended solids had most negative impact on (−0.90), fresh positively (FI: 0.94, BIX: 0.78), in contrast to recalcitrant humic (C4: −0.96). These findings underscore role interception mitigating pollutant loads, particularly nutrients, highlight their importance regulating dynamics across hydrological conditions.

Language: Английский

Citations

0