Next Article in Journal
Composition of Sedimentary Organic Matter across the Laptev Sea Shelf: Evidences from Rock-Eval Parameters and Molecular Indicators
Next Article in Special Issue
Optical Absorption Characteristics, Spatial Distribution, and Source Analysis of Colored Dissolved Organic Matter in Wetland Water around Poyang Lake
Previous Article in Journal
Quality and Health Risk Assessment Associated with Water Consumption—A Case Study on Karstic Springs
Open AccessEditor’s ChoiceArticle

Dissolved Organic Matter in Continental Hydro-Geothermal Systems: Insights from Two Hot Springs of the East African Rift Valley

1
Department de Biologia evolutiva, Ecologia y Ciencies ambientals, Universitat de Barcelona, 08028 Barcelona, Spain
2
Water Research Institute (IRSA-CNR), Via Salaria km 29.300–CP10, 00015 Monterotondo, Rome, Italy
3
Department Lake Research, Helmholtz Centre for Environmental Research (UFZ), 39114 Magdeburg, Germany
4
Department Analytical Chemistry, Research Group BioGeoOmics, Helmholtz Centre for Environmental Research (UFZ), 04318 Leipzig, Germany
5
Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121 Florence, Italy
6
Department of Geology, University of Nairobi, P.O Box 30197, Nairobi 00100, Kenya
7
Department of Environmental Engineering, University of Calabria, 87036 Arcavacata di Rende (CS), Italy
8
University of Leicester, Leicester LE1 7RH, UK
9
Freshwater Biological Association, Ambleside LA22 0LP, UK
10
Institute of Geosciences and Earth Resources (IGG-CNR), Via G. La Pira 4, 50121 Florence, Italy
*
Authors to whom correspondence should be addressed.
Water 2020, 12(12), 3512; https://doi.org/10.3390/w12123512
Received: 26 October 2020 / Revised: 26 November 2020 / Accepted: 7 December 2020 / Published: 14 December 2020
(This article belongs to the Special Issue Dissolved Organic Matter Dynamics in Groundwater, Rivers, and Lakes)
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. View Full-Text
Keywords: DOM; FT-ICR-MS; hot springs; East African Rift Valley; Kenya DOM; FT-ICR-MS; hot springs; East African Rift Valley; Kenya
Show Figures

Graphical abstract

MDPI and ACS Style

Butturini, A.; Amalfitano, S.; Herzsprung, P.; Lechtenfeld, O.J.; Venturi, S.; Olaka, L.A.; Pacini, N.; Harper, D.M.; Tassi, F.; Fazi, S. Dissolved Organic Matter in Continental Hydro-Geothermal Systems: Insights from Two Hot Springs of the East African Rift Valley. Water 2020, 12, 3512. https://doi.org/10.3390/w12123512

AMA Style

Butturini A, Amalfitano S, Herzsprung P, Lechtenfeld OJ, Venturi S, Olaka LA, Pacini N, Harper DM, Tassi F, Fazi S. Dissolved Organic Matter in Continental Hydro-Geothermal Systems: Insights from Two Hot Springs of the East African Rift Valley. Water. 2020; 12(12):3512. https://doi.org/10.3390/w12123512

Chicago/Turabian Style

Butturini, Andrea; Amalfitano, Stefano; Herzsprung, Peter; Lechtenfeld, Oliver J.; Venturi, Stefania; Olaka, Lydia A.; Pacini, Nic; Harper, David M.; Tassi, Franco; Fazi, Stefano. 2020. "Dissolved Organic Matter in Continental Hydro-Geothermal Systems: Insights from Two Hot Springs of the East African Rift Valley" Water 12, no. 12: 3512. https://doi.org/10.3390/w12123512

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop