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Liang S, Zhang M, Wang X, Li H, Li S, Ma H, Wang X, Rong Z. Seasonal dynamics of dissolved organic matter bioavailability coupling with water mass circulation in the South Yellow Sea. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166671. [PMID: 37657546 DOI: 10.1016/j.scitotenv.2023.166671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 08/27/2023] [Accepted: 08/27/2023] [Indexed: 09/03/2023]
Abstract
As a typical shelf-marginal sea, the South Yellow Sea (SYS) is significantly influenced by various factors such as land-based inputs and water mass movements, leading the complex biogeochemical processes of dissolved organic matter (DOM) to become highly dynamic. However, the bioavailability of dissolved organic matter (DOM) coupled with water mass circulation has not been accurately assessed, despite being crucial for understanding the source-sink pattern of organic carbon in marginal sea. In this study, four cruises were conducted in the SYS to analyze the spatial and temporal distribution characteristics of dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and total dissolved amino acids (TDAA). Combined with the bioassay experiments, TDAA carbon normalized yield [TDAA (%DOC)] and TDAA degradation index (DIAA) were used as indicators to explore the bioavailability of DOM across different water masses. Results show that the DOC of the SYS exhibits higher average value in late autumn and early winter, and lower value in spring and summer due to the seasonal alternation of water mass and biological activities. The collective results indicate that DOM bioavailability is higher in the Changjiang River diluted water (CDW) and lower in the Yellow Sea warm current (YSWC) and the Yellow Sea cold water mass (YSCWM). Approximately 20 % of DON can be degraded in the YSCWM during autumn. Notably, although the YSCWM constitutes merely constitutes 10 % of the SYS volume, it stores 18.1 % dissolved inorganic nitrogen (DIN) and 23.9 % PO43- of total nutrients, indicating that the YSCWM is a significant nutrient reservoir within the SYS.
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Affiliation(s)
- Shengkang Liang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; Center for Ocean Carbon Neutrality, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Mingzheng Zhang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xinke Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Hongguan Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Shanshan Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Haoyang Ma
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiulin Wang
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Zengrui Rong
- College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China.
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Niu H, Lu X, Zhang G, Sarangi C. Investigation of water-soluble organic constituents and their spatio-temporal heterogeneity over the Tibetan Plateau. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 302:119093. [PMID: 35245621 DOI: 10.1016/j.envpol.2022.119093] [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: 11/23/2021] [Revised: 01/24/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Investigating the migration and transformation of carbonaceous and nitrogenous matter in the cryosphere areas is crucial for understanding global biogeochemical cycle and earth's climate system. However, water-soluble organic constituents and their transformation in multiple water bodies are barely investigated. Water-soluble organic carbon (WSOC) and organic nitrogen (WSON), and particulate black carbon (PBC) in multiple types of water bodies in eastern Tibetan Plateau (TP) cryosphere for the first time have been systematically investigated. Statistical results exhibited that from south to north and from east to west of this region, WSOC concentrations in alpine river runoff were gradually elevated. WSOC and nitrogenous matter in the alpine river runoff and precipitation in the glacier region presented distinct seasonal variations. WSON was the dominant component (63.4%) of water-soluble total nitrogen in precipitation over high-altitude southeastern TP cryosphere. Water-soluble carbonaceous matter dominated the carbon cycle in the TP cryosphere, but particulate carbonaceous matter in the alpine river runoff had a small fraction of the cryospheric carbon cycle. Analysis of optical properties illustrated that PBC had a much stronger light absorption ability (MAC-PBC: 2.28 ± 0.37 m2 g-1) than WSOC in the alpine river runoff (0.41 ± 0.26 m2 g-1). Ionic composition was dominated by SO42-, NO3-, and NH4+ (average: 45.13 ± 3.75%) in the snow of glaciers, implying important contribution of (fossil fuel) combustion sources over this region. The results of this study have essential implications for understanding the carbon and nitrogen cycles in high altitude cryosphere regions of the world. Future work should be performed based on more robust in-situ observations and measurements from multiple environmental medium over the cryosphere areas, to ensure ecological protection and high-quality development of the high mountain Asia.
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Affiliation(s)
- Hewen Niu
- State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China.
| | - Xixi Lu
- Department of Geography, National University of Singapore, 1 Arts Link, 117570, Singapore
| | - Guotao Zhang
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
| | - Chandan Sarangi
- Department of Civil Engineering, Indian Institute of Technology, Madras, Chennai, India; Laboratory for Atmospheric and Climate Sciences, Indian Institute of Technology Madras, Chennai, India
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Hu C, Liu Z, Xiong K, Lyu X, Li Y, Zhang R. Characteristics of and Influencing Factors of Hydrochemistry and Carbon/Nitrogen Variation in the Huangzhouhe River Basin, a World Natural Heritage Site. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182413169. [PMID: 34948779 PMCID: PMC8701991 DOI: 10.3390/ijerph182413169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/08/2021] [Accepted: 12/12/2021] [Indexed: 11/16/2022]
Abstract
In karst areas, the characteristics of water chemistry and carbon and nitrogen are of great significance to basic research. The contents of Ca2+, Mg2+, K+, Na+, HCO3-, SO42-, NO3-, Cl-, dissolved organic carbon (DOC), and total nitrogen (TN) in water samples from 18 rivers and 14 springs in the Huangzhouhe River Basin were determined. The results showed that the water chemistry type in the Huangzhouhe River Basin is HCO3-Ca-Mg. The chemical composition is mainly affected by dolomite weathering and also by ion exchange and other human activities. The river and spring DIC remain at the same level in the upper and middle reaches and decrease in the lower reaches. The NO3-N and TN of river water and TN of spring water increase in the middle reaches, while NO3-N of spring water decreases in the lower reaches. The DOC in the basin increases with the increase of SO42- and Cl-, mainly due to the human influence of agricultural and domestic sewage. In the basin, the NO3-N and TN in spring water are larger, and the DOC in river water is larger, mainly because there are more phytoplankton and human activities in the river water. The carbon and nitrogen in the Huangzhouhe River Basin are mainly HCO3- and NO3- ions. The evaluation of pH, Cl-, NO3-N, SO42-, and TDS shows that the water quality is good and the ecological environment is good.
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Affiliation(s)
- Chenpeng Hu
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
| | - Ziqi Liu
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
| | - Kangning Xiong
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
- Correspondence:
| | - Xiaoxi Lyu
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
| | - Yuan Li
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
| | - Renkai Zhang
- School of Karst Science, Guizhou Normal University, Guiyang 550001, China; (C.H.); (Z.L.); (X.L.); (Y.L.); (R.Z.)
- State Engineering Technology Institute for Karst Desertification Control, Guiyang 550001, China
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Guo Y, Song C. Investigation into effects of warmer conditions on seasonal runoff and dissolved carbon fluxes in permafrost catchments in northeast China. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2021; 23:890-902. [PMID: 34018515 DOI: 10.1039/d1em00037c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Eurasian permafrost serves as an important carbon pool and water resource for linked aquatic ecosystems. To investigate the effects of expected warmer climate under climate change, and also to fill the data gaps in the south margin of the Eurasian permafrost, the seasonal runoff and the associated dissolved carbon fluxes in a pair of catchments in the Great Khingan Mountains of northeast China were investigated in 2018-2019. Two similar small catchments, a south-facing (SF) and a north-facing (NF), were used to check the effects of warmer climate on the dynamics of runoff and dissolved carbon yields. The SF catchment, with a warmer condition compared to the NF catchment, presented much larger snowmelt runoff during spring and more gentle rainfall flood peaks in the summer-autumn period, but similar concentrations of dissolved carbons during both the periods. As a result, the dissolved carbon fluxes were greatly elevated during the snowmelt period. However, the runoff and carbon yield in the two catchments showed no significant difference during the summer rainfall periods, in spite of a much deeper active layer of permafrost in the SF. As indicated by two fluorescence indices, the humification (HIX) and biological index (BIX), the chemical characteristics of dissolved carbon were similar in both the snowmelt and rainfall runoff periods in the two catchments. These results emphasize that warmer climate would largely alter the seasonal runoff patterns and promote dissolved carbon export in the snowmelt period, which would lead to more unexpected ecological impacts on the aquatic systems in the south Eurasian permafrost.
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Affiliation(s)
- Yuedong Guo
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China.
| | - Changchun Song
- Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China. and Dalian University of Technology, Dalian, 116024, China
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Analysis of the Performance of Bank Filtration for Water Supply in Arid Climates: Case Study in Egypt. WATER 2020. [DOI: 10.3390/w12061816] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bank filtration (BF) is acknowledged as a sustainable and effective technique to provide drinking water of adequate quality; it has been known for a long time in Europe. However, this technique is site-specific and therefore its application in developing countries with different hydrologic and environment conditions remains limited. In this research, a 3-discipline study was performed to evaluate the feasibility of the application of this technique in Aswan City (Egypt). Firstly, a hydrological model was developed to identify key environmental factors that influence the effectiveness of BF, and to formulate plans for the design and management of the BF system. Secondly, water samples were collected for one year (January 2017 to December 2017) from the water sources and monitoring wells to characterize the bank-filtrate quality. Lastly, an economic study was conducted to compare the capital and operating costs of BF and the existing treatment techniques. The results demonstrated that there is high potential for application of BF under such hydrological and environmental conditions. However, there are some aspects that could restrict the BF efficacy and must therefore be considered during the design process. These include the following: (i) Over-pumping practices can reduce travel time, and thus decrease the efficiency of treatment; (ii) Locating the wells near the surface water systems (<50 m) decreases the travel time to the limit (<10 days), and thus could restrict the treatment capacity. In such case, a low pumping rate must be applied; (iii) the consequences of lowering the surface water level can be regulated through the continuous operation of the wells. Furthermore, laboratory analysis indicated that BF is capable of producing high quality drinking water. However, an increase in organic matter (i.e., humics) concentration was observed in the pumped water, which increases the risk of trihalomethanes being produced if post-chlorination is implemented. The economic study ultimately demonstrated that BF is an economic and sustainable technique for implementation in Aswan City to address the demand for potable water.
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Liu J, Han G, Liu X, Liu M, Song C, Zhang Q, Yang K, Li X. Impacts of Anthropogenic Changes on the Mun River Water: Insight from Spatio-Distributions and Relationship of C and N Species in Northeast Thailand. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E659. [PMID: 30813409 PMCID: PMC6406437 DOI: 10.3390/ijerph16040659] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 02/15/2019] [Accepted: 02/20/2019] [Indexed: 11/17/2022]
Abstract
C and N species, including dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), dissolved organic nitrogen (DON), NO₃- and NH₄⁺ contents in 57 river water samples collected from the Mun River of Thailand were measured to determine the relationships between these dissolved load species and their impacts on the environment. DOC values varied between 1.71 and 40.08 mg/L, averaging 11.14 mg/L; DON values ranged from 0.20 to 1.37 mg/L, with an average value of 0.48 mg/L; NO₃--N values averaged 0.18 mg/L; and NH₄⁺-N values averaged 0.15 mg/L. DOC contents increased while DON and NO₃- values decreased along the flow direction. The concentrations of NH₄⁺ maintained the same level in the whole watershed. DOC and DON values exhibited clearly higher concentrations in comparison with other rivers worldwide and were inextricably linked with anthropogenic inputs. The relationships of DOC, DON, and anthropogenic ions imply that there are two different anthropogenic sources (industrial activities and agricultural activities) of the dissolved load in the Mun River watershed. The limited correlations between the DON, NO₃-, and NH₄⁺ indicate that the N species are not dominated by a single factor, and reciprocal transformations of riverine N pool are complex. Based on the environmental water quality standard reported by the EC (European Communities) and the World Health Organization, assessments of the water quality using the parameters of pH, dissolved oxygen (DO), NO₃-, NH₄⁺, and TN (total nitrogen) in the Mun River were conducted. The results demonstrate that the river water faces potential environmental pollution, and anthropogenic inputs endanger local water quality and the aquatic community. Therefore, the local government should restrict and reduce the anthropogenic inputs discharged in to rivers, and launch long-term monitoring of water quality.
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Affiliation(s)
- Jinke Liu
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Guilin Han
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Xiaolong Liu
- Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China.
| | - Man Liu
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Chao Song
- The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China.
| | - Qian Zhang
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Kunhua Yang
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
| | - Xiaoqiang Li
- School of Scientific Research, China University of Geosciences (Beijing), Beijing 100083, China.
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