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Water
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Dissolved Organic Matter Dynamics in Groundwater, Rivers, and Lakes
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Dissolved Organic Matter Dynamics in Groundwater, Rivers, and Lakes

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Water Quality and Contamination".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 5973

Special Issue Editors

Dr. Oliver J. Lechtenfeld

E-Mail Website
Guest Editor
Department of Analytical Chemistry—Research Group BioGeoOmics, Helmholtz Centre for Environmental Research—UFZ, Leipzig, Germany
Interests: natural organic matter (NOM); biogeochemistry; ultra-high resolution mass spectrometry; chemoinformatics; environmental metabolomics; advanced water treatment processes; stable isotope labeling
Dr. Peter Herzsprung

E-Mail Website
Guest Editor
Department of Lake Research, Helmholtz Centre for Environmental Research—UFZ, Magdeburg, Germany
Interests: natural organic matter (NOM); high resolution mass spectrometry elemental formula data sets; formula assignment; water chemistry; biogeochemistry; excitation emission matrix fluorescence spectroscopy

Special Issue Information

Dear Colleagues,

Natural organic matter is an inherent constituent of the limnosphere. In its dissolved form, it connects large soil carbon stocks with the highly dynamic aqueous compartments of groundwater, streams, rivers, and lakes. In the aqueous phase, a plethora of microbial and chemical processes then alter the amount, composition, and reactivity of dissolved organic matter (DOM). This interplay between hydrology and biogeochemistry results in an incredibly complex mixture of organic molecules that has substantial implications for microbial utilization, freshwater ecology, and water use, e.g., during drinking water production.

Although many of these interactions have been extensively studied, we still lack a comprehensive understanding of the mechanisms controlling the composition of DOM, its mobilization and export from terrestrial sources, and its biogeochemical reactivity.

This Special Issue seeks to address the dynamic nature of DOM, i.e., processes that lead to and change its molecular and structural compositions and determine its mobilization, turnover, and future significance for regional water quality and the global carbon cycle.

We invite interdisciplinary contributions from researchers studying the dynamics of dissolved organic carbon/matter in groundwater, streams, rivers, and lakes around the globe. Contributions may deal with but are not limited to mechanistic field or laboratory studies, novel methods for the molecular characterization of DOM, quantitative and qualitative assessments of DOM sources, or data-driven and predictive modeling of DOM concentration, export, and turnover in catchments.

Dr. Oliver J. Lechtenfeld
Dr. Peter Herzsprung
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • dissolved organic matter
  • molecular composition
  • structural elucidation
  • carbon cycle
  • mobilization and export
  • global change
  • water quality
  • biomarker
  • stable isotopes
  • high resolution mass spectrometry

Published Papers (2 papers)

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Research

14 pages, 2910 KiB  
Article
Optical Absorption Characteristics, Spatial Distribution, and Source Analysis of Colored Dissolved Organic Matter in Wetland Water around Poyang Lake
by Zhengjun Jian, Jian Xu, Xiaolan Huang, Wenjing Yang and Qiwu Hu
Water 2021, 13(3), 274; https://doi.org/10.3390/w13030274 - 24 Jan 2021
Cited by 8 | Viewed by 2575
Abstract
Colored dissolved organic matter (CDOM) is an important part of aquatic ecosystems and plays a key role in the biogeochemical cycle. In this study, CDOM absorption spectrum curves and water quality parameters from 30 sampling sites in the wetlands of Poyang Lake, Jiangxi [...] Read more.
Colored dissolved organic matter (CDOM) is an important part of aquatic ecosystems and plays a key role in the biogeochemical cycle. In this study, CDOM absorption spectrum curves and water quality parameters from 30 sampling sites in the wetlands of Poyang Lake, Jiangxi Province, China, were collected in October 2016. The optical absorption characteristics and spatial distribution of CDOM, the correlation between the absorption coefficient of CDOM at a wavelength of 355 nm (ag(355)), and the concentration of dissolved organic carbon (DOC) were analyzed. Spectral characteristic parameters—namely, E2/E3 (the ratio of the CDOM absorption coefficient at a wavelength of 250 nm to the CDOM absorption coefficient at a wavelength of 365 nm), SUVA254 (the ratio of the CDOM absorption coefficient at a wavelength of 254 nm to the DOC concentration), and spectral slopes—were used to infer the composition and sources of CDOM in the Poyang Lake wetlands. The results showed the following: (1) the CDOM absorption spectrum of water of the Poyang Lake wetlands presented significant spatial variation, showing a trend of south > west > north > east; (2) there was a strong linear correlation between the CDOM absorption coefficient and the DOC concentration in the water of the Poyang Lake wetlands (ag(355) = 1.075DOC–0.659 (r2 = 0.723, p < 0.001, n = 30)); (3) the analysis of the spectral characteristic parameters E2/E3, SUVA254, and spectral slopes showed that the CDOM in the Poyang Lake wetlands has relatively high aromaticity and molecular weight, which were shown to be mainly affected by terrestrial inputs. The results showed that the molecular weight and aromaticity of CDOM were higher in the south of the lake than in other parts. Full article
(This article belongs to the Special Issue Dissolved Organic Matter Dynamics in Groundwater, Rivers, and Lakes)
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12 pages, 1207 KiB  
Article
Dissolved Organic Matter in Continental Hydro-Geothermal Systems: Insights from Two Hot Springs of the East African Rift Valley
by Andrea Butturini, Stefano Amalfitano, Peter Herzsprung, Oliver J. Lechtenfeld, Stefania Venturi, Lydia A. Olaka, Nic Pacini, David M. Harper, Franco Tassi and Stefano Fazi
Water 2020, 12(12), 3512; https://doi.org/10.3390/w12123512 - 14 Dec 2020
Cited by 4 | Viewed by 2707
Abstract
Little is known about the quantity and quality of dissolved organic matter (DOM) in waters from continental geothermal systems, with only a few reports available from the Yellowstone US National Park. In this study, we explored the chemodiversity of DOM in water samples [...] Read more.
Little is known about the quantity and quality of dissolved organic matter (DOM) in waters from continental geothermal systems, with only a few reports available from the Yellowstone US National Park. In this study, we explored the chemodiversity of DOM in water samples collected from two geothermal hot springs from the Kenyan East African Rift Valley, a region extremely rich in fumaroles, geysers, and spouting springs, located in close proximity to volcanic lakes. The DOM characterization included in-depth assessments performed by negative electrospray ionization Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS). Reduced, saturated and little aromatic DOM compounds were dominant in the hot spring waters collected from either the Ol Njorowa gorge (ON) or the south shore of the soda-saline Lake Elementaita (ELM). Oxygen-poor and sulfur-bearing DOM molecules prevailed in ON, probably reflecting abiotic sulfurization from sulfide-rich geofluids. Nitrogen-bearing aliphatic and protein-like molecules were abundant in ELM, possibly perfusing through the organic-rich sediments of the adjacent Lake Elementaita. Notably, the heat-altered DOM of ancient autochthonous derivation could represent an overlooked source of aliphatic organic carbon for connected lentic environments, with a potential direct impact on nutrient cycling in lakes that receive geothermal water inputs. Full article
(This article belongs to the Special Issue Dissolved Organic Matter Dynamics in Groundwater, Rivers, and Lakes)
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