Identification and characterization of dissolved organic matter sources in Kushiro river impacted by a wetland

Shafiquzzaman, Md.; Ahmed, Abdelkader T.; Azam, Md. Shafiul; Razzak, Abdur; Askri, Brahim; Hassan, Haydar Faez; Ravikumar, Boopalan; Okuda, Testuji

doi:10.1016/j.ecoleng.2014.06.023

Cited by 25 publications

(7 citation statements)

References 30 publications

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“…The pH was fixed at 3.0 for fluorescence measurements to minimize potential interference from metals present. Three-dimensional EEM of DOM samples from five reservoirs were analyzed using a Hitachi Fluorescence Spectrophotometer (F-7000) equipped with the Fluorescence Solutions 2.1 software [26,27] for data processing. Fluorescence scans were conducted at excitation wavelengths from 200 to 450 nm using 5 nm increments and emission wavelengths from 280 to 550 nm at 5 nm increments, a bandwidth of 5 nm, and 0.5 s of integration time.…”

Section: Eem Fluorescence Spectroscopymentioning

confidence: 99%

The Response of Catchment Ecosystems in Eutrophic Agricultural Reservoirs to Water Quality Management Using DOM Fluorescence

Jin

Lee

et al. 2019

Sustainability

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Three-dimensional excitation emission matrix (EEM) fluorescence spectroscopy was used to investigate the characteristics of dissolved organic matter (DOM) in five typical eutrophic agricultural reservoirs. Based on catchment ecosystem, the five reservoirs were divided into three pollution sources of livestock, living, and farmland sources. The quantities and qualities of DOM in the reservoirs were analyzed. Our results showed that DOM characteristics were different in eutrophic reservoirs based on source. More protein-like components were observed in the reservoirs with the living sources, while more humic-like components were seen in the reservoir with farmland sources. Additionally, correlation analysis showed different sources for protein-like and humic-like components. Protein-like components originated mainly from phytoplankton (endogenous sources), and humic-like components were from terrestrial sources. Furthermore, the high values of specific fluorescence parameters were consistent with a dominant role of endogenous DOM in eutrophic water bodies, with FI values (fluorescence index) of approximately 1.9, and β:α values (freshness index) greater than 0.7. This result indicated that mixed features dominated endogenous sources in the reservoirs, regardless of terrestrial pollution sources. By comparing our fluorescence characteristics and historical references, we confirmed that catchment ecosystems related to human activities are important factors in determination of the characteristics of DOM in aquatic environments. However, complex and extensive eutrophication requires endogenous control of water bodies, which will play a central role in improving water environments and sustainable use of reservoirs. Therefore, this study provides an effective basis for water quality assessment of eutrophic agricultural reservoirs.

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Section: Eem Fluorescence Spectroscopymentioning

confidence: 99%

The Response of Catchment Ecosystems in Eutrophic Agricultural Reservoirs to Water Quality Management Using DOM Fluorescence

Jin

Lee

et al. 2019

Sustainability

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“…All analyses were performed in triplicate and analyzed using SPSS 26 and Excel 2016. The 3D fluorescence spectra and parallel factor (PARAFAC) analysis modeling simulations were analyzed using MATLAB (version 2009b) (Shafiquzzaman et al, 2014). Principal coordinates analysis (PCoA) based on the Bray-Curtis distances was used to reveal the beta diversity of the microbial communities.…”

Section: Statistical Analysesmentioning

confidence: 99%

Decades of weathering improves coal waste biogeochemical properties by altering dissolved organic matter and microbial communities: A case‐study of a coal waste pile

et al. 2023

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The spatial heterogeneity of vegetation cover in coal waste pile suggests that the geochemical and biological properties of coal waste are spatially heterogeneous, which contributes to vegetation colonization on tailings. However, whether and how altering the organic matter components and microbial community of coal waste via weathering affects biogeochemical characteristics and vegetation establishment mechanisms remain unclear. Thus, we explored the characterization of dissolved organic matter in coal waste and its biogeochemical implications. Our results highlight coal waste as primary succession for bacterial communities and provide new insights into the bacterial community assembly response to dissolved organic matter and geochemical properties at such sites. Biogeochemical parameters including pH, EC, nutrients, particle size, and enzymatic activities were affected differently by organic components. The electrical conductivity (EC) decreased after decades of natural weathering, whereas pH, moisture, available N and P, urease, phosphatase, soluble microbial byproduct‐like material, humic acid‐like organics, bacterial diversity, and richness increased significantly. Further taxonomical and co‐occurrence network analyses indicated that the primary succession of bacterial communities was strongly influenced by biogenically formed organic components, particle size, and available nutrients. Our results revealed that the humic‐like components facilitated the improved biogeochemical properties and succession of composition and structure of the bacterial community. It demonstrated that weathering‐induced organic matter degradation trigger biogeochemical property improvement and bacterial community succession, and further facilitate the transformation of coal waste into a plant growth substrate. Our results provide a reference for engineering and application practice of utilization and in‐situ remediation ecological reconstruction in coal waste deposits.

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“…Threedimensional fluorescence excitation-emission matrices (EMM) of DOM samples from the Baitapu River were analyzed using a Hitachi Fluorescence Spectrophotometer (F-7000) equipped with the fluorescence solutions 2.1 software (Jamieson et al 2014;Shafiquzzaman et al 2014) for data processing. Fluorescence scans were conducted with excitation wavelengths from 200 to 450 nm at 5 nm increments and emission wavelengths from 280 to 550 nm at 5 nm increments, 5 nm bandwidth and 0.5 s integration time, and Mili-Q filtered water was used as blank.…”

Section: Eem Fluorescence Spectroscopymentioning

confidence: 99%

Impact of spring flooding on DOM characterization in a small watershed of the Hun River, China

et al. 2015

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Potential water pollution derived from melting snow is a growing concern to watershed management in northern climates. For most small watersheds in the Hun River Basin, substantial portions of the annual load of pollutants such as organic matter, ammonia, phosphorus and metals come from snowmelt and early spring runoff. Thus, the annual spring flood is a real threat to the trophic state and water quality of Hun River. By three-dimensional fluorescence technology, the composition and characteristics of dissolved organic matter (DOM) in early spring runoff of a small watershed (the Baitapu River) were analyzed, and the correlation with land use was investigated. The result showed that compared with NH 3 -N and TP, DOM was not the major contributor to water quality deterioration in spring flooding, but its composition still presented significant differences. Compared with that in medium flow period, the abundance of a soluble microbial byproduct-like material in the spring-flood period decreased from 28.6 to 15.8 %, while those of tyrosine-like material and humic-like material increased from 36.0 and 1.8 % to 44.4 and 10.7 %, respectively. DOM in spring flooding had a relatively higher aromaticity degree, a greater humification level, and a larger molecular weight.Meanwhile, DOM from urban areas contained more tyrosine-like material. For the Baitapu River, urban areas were the major DOM source in both the medium flow period (from dispersed point sources) and the spring flood period (from a wastewater treatment plant). Therefore, DOM composition can be used as an effective indicator for tracking pollution sources.

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Identification and characterization of dissolved organic matter sources in Kushiro river impacted by a wetland

Cited by 25 publications

References 30 publications

The Response of Catchment Ecosystems in Eutrophic Agricultural Reservoirs to Water Quality Management Using DOM Fluorescence

The Response of Catchment Ecosystems in Eutrophic Agricultural Reservoirs to Water Quality Management Using DOM Fluorescence

Decades of weathering improves coal waste biogeochemical properties by altering dissolved organic matter and microbial communities: A case‐study of a coal waste pile

Impact of spring flooding on DOM characterization in a small watershed of the Hun River, China

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