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Pi K, Van Cappellen P, Li H, Gan Y, Tong L, Zhong X, Wang Y. Soil respiration induces co-emission of greenhouse gases and methylated selenium from cold-region Mollisols: Significance for selenium deficiency. ENVIRONMENT INTERNATIONAL 2024; 188:108758. [PMID: 38781702 DOI: 10.1016/j.envint.2024.108758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 05/25/2024]
Abstract
Mollisols rich in natural organic matter are a significant sink of carbon (C) and selenium (Se). Climate warming and agricultural expansion to the cold Mollisol regions may enhance soil respiration and biogeochemical cycles, posing a growing risk of soil C and Se loss. Through field-mimicking incubation experiments with uncultivated and cultivated soils from the Mollisol regions of northeastern China, this research shows that soil respiration remained significant even during cold seasons and caused co-emission of greenhouse gases (CO2 and CH4) and methylated Se. Such stimulus effects were generally stronger in the cultivated soils, with maximum emission rates of 7.45 g/m2/d C and 1.42 μg/m2/d Se. For all soil types, the greatest co-emission of CO2 and dimethyl selenide occurred at 25 % soil moisture, whereas measurable CH4 emission was observed at 40 % soil moisture with higher percentages of dimethyl diselenide volatilization. Molecular characterization with three-dimensional fluorescence and ultra-high resolution mass spectrometry suggests that CO2 emission is sensitive to the availability of microbial protein-like substances and free energy from organic carbon biodegradation under variable moisture conditions. Predominant Se binding to biodegradable organic matter resulted in high dependence of Se volatilization on rates of greenhouse gas emissions. These findings together highlight the importance of dynamic organic carbon quality for soil respiration and consequent Mollisol Se loss risk, with implications for science-based management of C and Se resources in agricultural lands to combat with Se deficiency.
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Affiliation(s)
- Kunfu Pi
- MOE Key Laboratory of Groundwater Quality and Health, China University of Geosciences, 430074 Wuhan, China; School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China; Ecohydrology Research Group, Department of Earth and Environmental Sciences, University of Waterloo, N2L 3G1 Waterloo, Canada; Heilongjiang Key Laboratory of Black Soil and Water Resources Research, 150036 Harbin, China
| | - Philippe Van Cappellen
- Ecohydrology Research Group, Department of Earth and Environmental Sciences, University of Waterloo, N2L 3G1 Waterloo, Canada
| | - Hongyan Li
- Institute of Mineral Resources, Chinese Academy of Geological Sciences, 100037 Beijing, China
| | - Yiqun Gan
- MOE Key Laboratory of Groundwater Quality and Health, China University of Geosciences, 430074 Wuhan, China; School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Lei Tong
- MOE Key Laboratory of Groundwater Quality and Health, China University of Geosciences, 430074 Wuhan, China; School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China; Heilongjiang Key Laboratory of Black Soil and Water Resources Research, 150036 Harbin, China
| | - Xinlin Zhong
- School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China
| | - Yanxin Wang
- MOE Key Laboratory of Groundwater Quality and Health, China University of Geosciences, 430074 Wuhan, China; School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China.
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Wang H, Xu Y, Kumar A, Knorr KH, Zhao X, Perez JPH, Sun G, Yu ZG. Temperature and organic carbon quality control the anaerobic carbon mineralization in peat profiles via modulating microbes: A case study of Changbai Mountain. ENVIRONMENTAL RESEARCH 2023; 237:116904. [PMID: 37595828 DOI: 10.1016/j.envres.2023.116904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/01/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
Peatlands account for a significant fraction of the global carbon stock. However, the complex interplay of abiotic and biotic factors governing anaerobic carbon mineralization in response to warming remains unclear. In this study, peat sediments were collected from a typical northern peatland-Changbai Mountain to investigate the behavior and mechanism of anaerobic carbon mineralization in response to depth (0-200 cm) and temperature (5 °C, 15 °C and 20 °C), by integrating geochemical and microbial analysis. Several indices including humification indexes (HI), aromaticity, and water extractable organic carbon (WEOC) components were applied to evaluate carbon quality, while 16S rRNA sequencing was used to measure microbial composition. Regardless of temperature, degradations of carbon quality and associated reduction in microbial abundance as well as diversity resulted in a decrease in anaerobic carbon mineralization (both CO2 and CH4) towards greater depth. Warming either from 5 °C to 15 °C or 20 °C significantly increased anaerobic carbon mineralization in all depth profiles by improving carbon availability. Enhanced carbon availabilities were mediated by the change in microbial composition (p < 0.01) and an increase in metabolic activities, which was particularly evident in the enhanced β-glucosidase activity and microbial collaborations. A remarkable increase of over 10-fold in the relative abundance of the Geothrix genus was observed under warming. Overall, warming resulted in an enhanced contribution of CH4 emission and a higher ratio of hydrogenotrophic methanogenesis, as evidenced by carbon isotope fractionation factors. In addition, deep peat soils (>100 cm) with recalcitrant carbon demonstrated greater temperature sensitivity (Q10: ∼2.0) than shallow peat soils (Q10:∼1.2) when temperature increased from 15 °C to 20 °C. The findings of this study have significantly deepened our understanding for mechanisms of carbon quality and microbe-driven anaerobic carbon mineralization in peatlands under global warming.
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Affiliation(s)
- Hongyan Wang
- School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China; Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Zhejiang Normal University, Jinhua, 321004, China; State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Yijie Xu
- School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Amit Kumar
- School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Klaus-Holger Knorr
- University of Münster, Institute for Landscape Ecology, Ecohydrology and Biogeochemistry Group, Heisenbergstr. 2, Münster, 48149, Germany
| | - Xiaoning Zhao
- School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Jeffrey Paulo H Perez
- Sec. 3.2 Organic Geochemistry, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473, Potsdam, Germany
| | - Guoxin Sun
- State Key Lab of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Zhi-Guo Yu
- School of Hydrology and Water Resources, Nanjing University of Information Science and Technology, Nanjing, 210044, China.
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3
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Ni M, Li S. Ultraviolet humic-like component contributes to riverine dissolved organic matter biodegradation. J Environ Sci (China) 2023; 124:165-175. [PMID: 36182127 DOI: 10.1016/j.jes.2021.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/11/2021] [Accepted: 10/11/2021] [Indexed: 06/16/2023]
Abstract
Biological degradation of dissolved organic matter (DOM) regulates its structure and fate in river ecosystems. Previous views suggested that labile components were dominantly consumed by microbial metabolism. Here we provide new observations that a part of recalcitrant compounds largely contribute to riverine DOM biodegradation. The excitation-emission matrix fluorescent spectroscopy combined with peak picking and parallel factor analysis are used to explore component variability during DOM incubation. Humic-like and tryptophan-like DOM are the primary components of riverine DOM, with proportion contributions of 39%-82% and 16%-61% for % of the maximum fluorescence intensity, respectively. After 56 days of aerobic incubation in the dark, large amounts of tyrosine-like DOM generation are observed. Elevated temperature enhances the decomposition of ultraviolet humic-like substance and further stimulates labile DOM bio-mineralization into carbon dioxide. Meanwhile, averaged proportions of amino acid compositions (peak B and T) markedly increase (p < 0.05) as the humic-like compositions (peak A, M and C) decrease after DOM incubation, suggesting incomplete degradation of refractory DOM from high-molecular to low-molecular weight compounds. The findings support the new notion of the continuous DOM biodegradation in a mode as "steps by steps", contributing to a new understanding of carbon cycling for the UN Sustainable Development Goal.
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Affiliation(s)
- Maofei Ni
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, China; The karst environmental geological hazard prevention laboratory of Guizhou Minzu University, Guiyang 550025, China; Key Laboratory of Reservoir Aquatic Environment, Research Center for Ecohydrology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Siyue Li
- Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, China; Key Laboratory of Reservoir Aquatic Environment, Research Center for Ecohydrology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China.
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4
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Kim S, Kim D, Jung MJ, Kim S. Analysis of environmental organic matters by Ultrahigh-Resolution mass spectrometry-A review on the development of analytical methods. MASS SPECTROMETRY REVIEWS 2022; 41:352-369. [PMID: 33491249 DOI: 10.1002/mas.21684] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 09/10/2020] [Accepted: 09/10/2020] [Indexed: 06/12/2023]
Abstract
Owing to the increasing environmental and climate changes globally, there is an increasing interest in the molecular-level understanding of environmental organic compound mixtures, that is, the pursuit of complete and detailed knowledge of the chemical compositions and related chemical reactions. Environmental organic molecule mixtures, including those in air, soil, rivers, and oceans, have extremely complex and heterogeneous chemical compositions. For their analyses, ultrahigh-resolution and sub-ppb level mass accuracy, achievable using Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS), are important. FT-ICR MS has been successfully used to analyze complex environmental organic molecule mixtures such as natural, soil, particulate, and dissolved organic matter. Despite its success, many limitations still need to be overcome. Sample preparation, ionization, structural identification, chromatographic separation, and data interpretation are some key areas that have been the focus of numerous studies. This review describes key developments in analytical techniques in these areas to aid researchers seeking to start or continue investigations for the molecular-level understanding of environmental organic compound mixtures.
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Affiliation(s)
- Sungjune Kim
- Department of Chemistry, Kyungpook National University, Daegu, Korea
| | - Donghwi Kim
- Oil and POPs Research Group, Korea Institute of Ocean Science and Technology, Geoje, Korea
| | - Maeng-Joon Jung
- Department of Chemistry, Kyungpook National University, Daegu, Korea
| | - Sunghwan Kim
- Department of Chemistry, Kyungpook National University, Daegu, Korea
- Mass Spectrometry Convergence Research Center and Green-Nano Materials Research Center, Daegu, Korea
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5
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Cooper WT, Chanton JC, D'Andrilli J, Hodgkins SB, Podgorski DC, Stenson AC, Tfaily MM, Wilson RM. A History of Molecular Level Analysis of Natural Organic Matter by FTICR Mass Spectrometry and The Paradigm Shift in Organic Geochemistry. MASS SPECTROMETRY REVIEWS 2022; 41:215-239. [PMID: 33368436 DOI: 10.1002/mas.21663] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/16/2020] [Accepted: 09/16/2020] [Indexed: 06/12/2023]
Abstract
Natural organic matter (NOM) is a complex mixture of biogenic molecules resulting from the deposition and transformation of plant and animal matter. It has long been recognized that NOM plays an important role in many geological, geochemical, and environmental processes. Of particular concern is the fate of NOM in response to a warming climate in environments that have historically sequestered carbon (e.g., peatlands and swamps) but may transition to net carbon emitters. In this review, we will highlight developments in the application of high-field Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) in identifying the individual components of complex NOM mixtures, focusing primarily on the fraction that is dissolved in natural waters (dissolved organic matter or DOM). We will first provide some historical perspective on developments in FTICR technology that made molecular-level characterizations of DOM possible. A variety of applications of the technique will then be described, followed by our view of the future of high-field FTICR MS in carbon cycling research, including a particularly exciting metabolomic approach.
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Affiliation(s)
- William T Cooper
- Department of Chemistry & Biochemistry, Florida State University, Tallahassee, FL
| | - Jeffrey C Chanton
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL
| | | | | | | | | | - Malak M Tfaily
- Department of Environmental Science, University of Arizona, Tucson, AZ
| | - Rachel M Wilson
- Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL
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6
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Clark MG, Biagi KM, Carey SK. Optical properties of dissolved organic matter highlight peatland-like properties in a constructed wetland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 802:149770. [PMID: 34464789 DOI: 10.1016/j.scitotenv.2021.149770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/30/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
Constructing novel peatland ecosystems can help to restore the long-term carbon accumulating properties of northern soil systems that have been lost through resource extraction. Although mining companies are legally required to restore landscapes following extraction, there are limited tools to evaluate the effectiveness of restoring peat accumulating landscapes. This study analyzed the spatial patterns of the first seven years (n = 575) of dissolved organic matter (DOM) optical characteristics from a pilot watershed built to restore boreal plains peatlands on a former open pit oil sands mine. A principal component analysis (PCA) indicated a very high degree of redundancy in absorption-florescence DOM properties (PARAFAC, HIX, FI, freshness index, SUVA, and peak A, B, C, T, wavelength, and intensity ratios) at this site. The leading principal component indicated a gradient of fresh protein rich inputs, which are highest near the upland region, to older highly degraded DOM, which is highest in the lowland closest to the outlet. Two functionally different reference peatlands, a poor-fen and bog system and a moderate-rich fen, had relatively similar optical DOM characteristics indicating a high level of decomposition at these sites. Over the first seven years, in some regions of the reconstructed lowland the DOM characteristics are becoming increasingly similar to the highly decomposed DOM observed at the reference sites. When combined with carbon flux measurements these findings indicate the potential for long term organic matter accumulation at this reconstructed site.
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Affiliation(s)
- M Graham Clark
- Watershed Hydrology Group, School of Earth, Environment & Society, McMaster University, Hamilton, ON, Canada.
| | - Kelly M Biagi
- Watershed Hydrology Group, School of Earth, Environment & Society, McMaster University, Hamilton, ON, Canada
| | - Sean K Carey
- Watershed Hydrology Group, School of Earth, Environment & Society, McMaster University, Hamilton, ON, Canada
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7
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Song ZM, Xu YL, Liang JK, Peng L, Zhang XY, Du Y, Lu Y, Li XZ, Wu QY, Guan YT. Surrogates for on-line monitoring of the attenuation of trace organic contaminants during advanced oxidation processes for water reuse. WATER RESEARCH 2021; 190:116733. [PMID: 33341034 DOI: 10.1016/j.watres.2020.116733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/26/2020] [Accepted: 12/06/2020] [Indexed: 05/27/2023]
Abstract
The large number of trace organic contaminants (TrOCs) in wastewater has resulted in severe concerns to human health. Ozonation and UV/H2O2 are widely used to remove TrOCs in wastewater treatment process. Owing to the trace concentrations of TrOCs in wastewater, real-time monitoring of the abatement efficiency of TrOCs through ozonation and UV/H2O2 is quite challenging. Instead of a direct measurement of all the TrOCs, the research community has begun to use different surrogates to monitor the attenuation of TrOCs during AOPs. Various surrogates have been developed over the past few decades. In this review, the different types of surrogates are summarized, including ultraviolet spectroscopy and fluorescence spectroscopy. Strong linear correlations have been found for the removal of TrOCs using AOPs, and the abatement of UV absorption spectroscopy at 254 nm or total fluorescence (TF). Moreover, a two-phase linear correlation can better describe the ozone-resistant TrOCs compared with a single linear correlation. Two different kinds of predictive models exist that use surrogates as the input for ozonation: the regression model and kinetic model. The development of the models requires a further understanding of the impacts of water quality, seasonal variations, and storm events on the kinetic parameters. For the in situ monitoring system, the light-emitting diode (LED) is one of the most promising light sources, although the sensitivity and accuracy still need to be improved.
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Affiliation(s)
- Zhi-Min Song
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Ya-Lan Xu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Jun-Kun Liang
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China
| | - Lu Peng
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China
| | - Xin-Yang Zhang
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Ye Du
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China
| | - Yao Lu
- Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China
| | - Xin-Zheng Li
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Qian-Yuan Wu
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
| | - Yun-Tao Guan
- Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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8
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Lu Q, He D, Pang Y, Zhang Y, He C, Wang Y, Zhang H, Shi Q, Sun Y. Processing of dissolved organic matter from surface waters to sediment pore waters in a temperate coastal wetland. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 742:140491. [PMID: 32623166 DOI: 10.1016/j.scitotenv.2020.140491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 06/22/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Coastal wetlands are active transitional ecotones between land and ocean, and are considered as hot spots of organic matter processing within the global carbon cycle, which dissolved organic matter (DOM) plays a critical role. In this study, combined use of ultrahigh-resolution mass spectrometry (FT-ICR MS) and complementary optical techniques was conducted to assess the detailed molecular composition of DOM in the temperate Liaohe coastal wetland (LCW), NE China in respect to the differences in DOM composition from surface water to sediment pore water. Significant positive correlations between salinity and dissolved organic carbon (DOC) concentrations were observed in both surface waters and pore waters. Pore water DOM is generally characterized by lower protein-like fluorescence and biological index, but higher humification and humic-like fluorescent components than those in surface water DOM. Corresponding to the optical properties, FT-ICR MS measurements show that pore water DOM has higher proportions of heteroatoms, aromaticity index, O/C ratios, unsaturated aliphatics, and peptides, but lower average H/C ratios compared to surface water DOM across locations with different marsh plant species (rice (Oryza sativa), reed (Phragmites australis), Seablite (Suaeda Salsa)) and salinity (0.5 to 51.5 psu). The results suggest that selective preservation for polyphenols, lignin degradation intermediates (highly unsaturated compounds), and microbial resynthesis of heteroatomic compounds are involved in the processing of DOM from surface water to pore water, leading to the formation of higher molecular weight and sulfur-containing molecules. The abundant CHOS compounds could be related to the early diagenetic sulfurization of DOM in sediments. Our unique data set should provide new clues for a comprehensive understanding of the molecular dynamics of DOM in coastal wetlands.
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Affiliation(s)
- Qingyuan Lu
- Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Ding He
- Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
| | - Yu Pang
- Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Yanzhen Zhang
- Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Changping District, Beijing 102249, China
| | - Yuntao Wang
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Haibo Zhang
- College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Quan Shi
- State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
| | - Yongge Sun
- Organic Geochemistry Unit, Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou 310027, China.
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9
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Short-Term Effects of Fertilization on Dissolved Organic Matter in Soil Leachate. WATER 2020. [DOI: 10.3390/w12061617] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Besides the importance of dissolved organic matter (DOM) in soil biogeochemical processes, there is still a debate on how agricultural intensification affects the leaching of terrestrial DOM into adjacent aquatic ecosystems. In order to close this linkage, we conducted a short-term (45 day) lysimeter experiment with silt loam and sandy loam undisturbed/intact soil cores. Mineral (calcium ammonium nitrate) or organic (pig slurry) fertilizer was applied on the soil surface with a concentration equivalent to 130 kg N ha−1. On average, amounts of leached DOC over 45 days ranged between 20.4 mg (silt loam, mineral fertilizer) and 34.4 mg (sandy loam, organic fertilizer). Both, mineral and organic fertilization of a silt loam reduced concentration of dissolved organic carbon (DOC) in the leachate and shifted its composition towards a microbial-like signature (BIX) with a higher aromaticity (Fi) and a lower molecular size (E2:E3). However, in sandy loam only mineral fertilization affected organic matter leaching. There, lowered DOC concentrations with a smaller molecular size (E2:E3) could be detected. The overall effect of fertilization on DOC leaching and DOM composition was interrelated with soil texture and limited to first 12 days. Our results highlight the need for management measures, which prevent or reduce fast flow paths leading soil water directly into aquatic systems, such as surface flow, fast subsurface flow, or drainage water.
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Zhang P, Huang P, Xu X, Sun H, Jiang B, Liao Y. Spectroscopic and molecular characterization of biochar-derived dissolved organic matter and the associations with soil microbial responses. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134619. [PMID: 31791751 DOI: 10.1016/j.scitotenv.2019.134619] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/20/2019] [Accepted: 09/21/2019] [Indexed: 06/10/2023]
Abstract
Dissolved organic matter (DOM) released from biochar can influence the microbial community structure, but the inherent mechanism associated with the structure of biochar-derived DOM remains insufficiently elucidated. In this study, the spectroscopic characteristics and molecular structures of biochar-derived DOM were studied, and the microbial responses to biochar-derived DOM were explored. With increasing biochar pyrolysis temperature (PT), the molecular weight and proportions of aliphatic and fulvic acid-like compounds in the biochar-derived DOM decrease along with an reduction in the amount of DOM released from the biochars, but the proportions of combustion-derived condensed polycyclic aromatics and humic acid-like and soluble microbial byproduct-like compounds increased. Accordingly, the humification index, H/C and (O + N)/C values also decreased. The spectroscopic characteristics of biochar-derived DOM were distinct from those of natural substrates. Moreover, the DOM extracted from biochar raw materials contained a high proportion of aliphatic compounds, while the DOM derived from high-PT biochars (500 °C) had similar characteristics to fulvic acid-like and soluble microbial byproduct-like compounds. The microbial abundance and community structure varied in different DOM solutions. The relative abundances (RAs) of eight genera (e.g. Dyadobacter, Sphingobacterium and Novosphingobium) had significantly positive correlations with the content of aliphatic compounds, while RAs of seven genera (e.g. Methylotenera, Acinetobacter and Reyranella) had significant positive correlations with the content of high-aromatic combustion-derived condensed polycyclic aromatics. These results are helpful for obtaining a deep understanding of the potential influences of various types of biochar-derived DOM on terrestrial and aquatic microbiology.
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Affiliation(s)
- Peng Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Peng Huang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xuejing Xu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Hongwen Sun
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Bin Jiang
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yuhong Liao
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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11
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Tfaily MM, Chu RK, Toyoda J, Tolić N, Robinson EW, Paša-Tolić L, Hess NJ. Sequential extraction protocol for organic matter from soils and sediments using high resolution mass spectrometry. Anal Chim Acta 2017; 972:54-61. [DOI: 10.1016/j.aca.2017.03.031] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 03/14/2017] [Accepted: 03/17/2017] [Indexed: 10/19/2022]
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Pan H, Yu H, Song Y, Zhu L, Liu R, Du E. Tracking fluorescent components of dissolved organic matter from soils in large-scale irrigated area. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6563-6571. [PMID: 28074372 DOI: 10.1007/s11356-017-8378-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 01/03/2017] [Indexed: 06/06/2023]
Abstract
Combination of fluorescence excitation-emission matrix spectroscopy with parallel factor analysis (PARAFAC) and principal component analysis (PCA) was engaged to track fluorescent components of dissolved organic matter (DOM) extracted from soils, to seek potential factors, and to reveal their correlations with physico-chemical properties of soils. Soil samples at different depths were collected in Hetao irrigated area of Inner Mongolia, China. Five fluorescent components (C1 to C5) were identified by PARAFAC modeling of DOM extracted from the soil samples. C1 was referred as fulvic-like fluorescent component, by which DOM was dominated in the whole soil samples. C2 was associated with salinity and agriculture, which was similar to marine humic-like fluorescent component. C3 was assigned as traditional humic-like fluorescent component. The three components were of the terrestrial origin. C4 was involved in tryptophan-like fluorescent component, which was autochthonous productions of biological degradation. C5 might be a polycyclic aromatic hydrocarbon contaminant, which could be relative to anthropogenic sources of pesticides. The C1, C2, and C3 were the potential factors of characterizing DOM fractions using PCA on fluorescent components and physico-chemical parameters. Moreover, DOM might restrained by exchangeable sodium percentage, and its formation and decomposition might be influenced by soil moisture.
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Affiliation(s)
- Hongwei Pan
- School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China
| | - Huibin Yu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China.
| | - Yonghui Song
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China.
| | - Lin Zhu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China
| | - Ruixia Liu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Science, Beijing, 100012, China
| | - Erdeng Du
- State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, 200092, China
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Mangal V, Zhu Y, Shi YX, Guéguen C. Assessing cadmium and vanadium accumulation using diffusive gradient in thin-films (DGT) and phytoplankton in the Churchill River estuary, Manitoba. CHEMOSPHERE 2016; 163:90-98. [PMID: 27521643 DOI: 10.1016/j.chemosphere.2016.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 07/15/2016] [Accepted: 08/01/2016] [Indexed: 06/06/2023]
Abstract
Diffusive gradient in thin films (DGT) and phytoplankton communities were evaluated for the measurement of Cd and V at environmentally relevant concentrations in laboratory settings and in the Churchill River estuary (Manitoba, Canada) during an annual spring melt. Despite rapid changes in hydrology and water quality, DGT samplers and intracellular Cd and V concentrations were positively correlated (0.79 < r(2) < 0.99), suggesting comparable accumulation trends between both DGT-labile and intracellular monitoring techniques. The largest accumulated concentrations of both Cd and V by DGT and phytoplankton accumulation methods were found later into the river discharge period. In controlled settings, accumulated Cd and V concentrations by the diatom Attheya septentrionalis displayed a strong correlation with metals accumulated by DGTs (r(2) > 0.99). Principal component analysis (PCA) reinforced similarities between both metal monitoring techniques and assessed how changing environmental variables during the river discharge period influenced each monitoring technique. Cd accumulation was influenced by DOC concentrations and protein-like DOM whereas ionic strength (i.e. conductivity) and humic-like DOM influenced V accumulation. The present findings suggest that (1) DGT is a versatile tool for monitoring bioaccumulation of Cd and V in highly dynamic environmental systems and (2) DOC concentration, DOM composition, conductivity, pH, and river discharge influence the bioavailability of Cd and V in estuarine and riverine waters.
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Affiliation(s)
- V Mangal
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - Y Zhu
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - Y X Shi
- Environmental and Life Sciences Graduate Program, Trent University, ON, Canada
| | - C Guéguen
- Chemistry Department, Trent University, ON, Canada.
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Liu C, Li P, Tang X, Korshin GV. Ozonation effects on emerging micropollutants and effluent organic matter in wastewater: characterization using changes of three-dimensional HP-SEC and EEM fluorescence data. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:20567-20579. [PMID: 27464659 DOI: 10.1007/s11356-016-7287-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/19/2016] [Indexed: 06/06/2023]
Abstract
The degradation of effluent organic matter (EfOM) in a municipal wastewater treated by ozonation was characterized using the methods of high-performance size-exclusion chromatography (HP-SEC) and excitation/emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC). The removal of 40 diverse trace-level contaminants of emerging concern (CEC) present in the wastewater was determined as well. Ozonation caused a rapid decrease of the absorbance and fluorescence of the wastewater, which was associated primarily with the oxidation of high and low apparent molecular weight (AMW) EfOM fractions. PARAFAC analysis also showed that components C1 and C2 decreased prominently in these conditions. The EfOM fraction of intermediate molecular weight ascribable to a terrestrial humic-like component (C3) tended to be less reactive toward ozone. Relative changes of EEM fluorescence were quantified using F max values of PARAFAC-identified components (∆F/F 0max). Unambiguous relationships between ∆F/F 0max values and the extent of the degradation of the examined CECs (∆C/C0) were established. This allowed correlating main parameters of the ∆C/C0 vs. ∆F/F 0max relationships with the rates of oxidation of these CECs. The results demonstrate the potential of online measurements of EEM fluorescence for quantitating effects of ozonation on EfOM and micropollutants in wastewater effluents.
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Affiliation(s)
- Chen Liu
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards & Environment, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Penghui Li
- College of Environmental Science & Engineering, Tongji University, Shanghai, 200092, China
| | - Xiangyu Tang
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards & Environment, Chinese Academy of Sciences, Chengdu, 610041, China.
| | - Gregory V Korshin
- Department of Civil & Environmental Engineering, University of Washington, Seattle, WA, 98195-2700, USA
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Oni OE, Schmidt F, Miyatake T, Kasten S, Witt M, Hinrichs KU, Friedrich MW. Microbial Communities and Organic Matter Composition in Surface and Subsurface Sediments of the Helgoland Mud Area, North Sea. Front Microbiol 2015; 6:1290. [PMID: 26635758 PMCID: PMC4658423 DOI: 10.3389/fmicb.2015.01290] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Accepted: 11/04/2015] [Indexed: 01/05/2023] Open
Abstract
The role of microorganisms in the cycling of sedimentary organic carbon is a crucial one. To better understand relationships between molecular composition of a potentially bioavailable fraction of organic matter and microbial populations, bacterial and archaeal communities were characterized using pyrosequencing-based 16S rRNA gene analysis in surface (top 30 cm) and subsurface/deeper sediments (30-530 cm) of the Helgoland mud area, North Sea. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS) was used to characterize a potentially bioavailable organic matter fraction (hot-water extractable organic matter, WE-OM). Algal polymer-associated microbial populations such as members of the Gammaproteobacteria, Bacteroidetes, and Verrucomicrobia were dominant in surface sediments while members of the Chloroflexi (Dehalococcoidales and candidate order GIF9) and Miscellaneous Crenarchaeota Groups (MCG), both of which are linked to degradation of more recalcitrant, aromatic compounds and detrital proteins, were dominant in subsurface sediments. Microbial populations dominant in subsurface sediments (Chloroflexi, members of MCG, and Thermoplasmata) showed strong correlations to total organic carbon (TOC) content. Changes of WE-OM with sediment depth reveal molecular transformations from oxygen-rich [high oxygen to carbon (O/C), low hydrogen to carbon (H/C) ratios] aromatic compounds and highly unsaturated compounds toward compounds with lower O/C and higher H/C ratios. The observed molecular changes were most pronounced in organic compounds containing only CHO atoms. Our data thus, highlights classes of sedimentary organic compounds that may serve as microbial energy sources in methanic marine subsurface environments.
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Affiliation(s)
- Oluwatobi E Oni
- Department of Microbial Ecophysiology, University of Bremen Bremen, Germany ; MARUM-Center for Marine Environmental Sciences, University of Bremen Bremen, Germany ; International Max-Planck Research School for Marine Microbiology Bremen, Germany
| | - Frauke Schmidt
- MARUM-Center for Marine Environmental Sciences, University of Bremen Bremen, Germany
| | - Tetsuro Miyatake
- Department of Microbial Ecophysiology, University of Bremen Bremen, Germany
| | - Sabine Kasten
- MARUM-Center for Marine Environmental Sciences, University of Bremen Bremen, Germany ; Department of Marine Geochemistry, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven, Germany
| | | | - Kai-Uwe Hinrichs
- MARUM-Center for Marine Environmental Sciences, University of Bremen Bremen, Germany
| | - Michael W Friedrich
- Department of Microbial Ecophysiology, University of Bremen Bremen, Germany ; MARUM-Center for Marine Environmental Sciences, University of Bremen Bremen, Germany
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