Changxun Yu
Forskare
Institutionen för biologi och miljö
Fakulteten för hälso- och livsvetenskap
Jag är forskare i miljövetenskap med ett särskilt intresse för biogeokemisk cykling av metaller/makronäringsämnen och deras svar/återkopplingar till mänskliga aktiviteter och miljöförändringar.
Undervisning
Jag undervisar i kurser på masterprogrammet Miljövetenskap och hållbar utveckling. En annan viktig del av min undervisning inkluderar också handledning av examensarbeten (grund och avancerad nivåer) and doktorsarbeten.
Forskning
Min forskning fokuserar huvudsakligen på biogeokemiska processer av Fe och Mn, såväl som deras (i) effekter på rörligheten, transporten och miljöspridningen av potentiellt giftiga eller biologiskt kritiska spårämnen (t.ex. U, Ni, As, och REEs); och (ii) kopplingar till lagring/omsättning av organiskt kol och kretslopp av näringsämnen (t.ex. Si, P, och N) i djup- och ytmiljöer. För att få fundamental förståelse av dessa processer och koppla dem till processer och fenomen i landskapsskala, kombinerar vi konventionella (bio)geokemiska analyser med ett brett utbud av toppmoderna avbildnings, spektroskopi och masspektrometri tekniker (t.ex. XAS, STXM, FTIR, GC-MS, och FT-ICRMS), isotopkarakteriseringar och moderna teoretiska simuleringar (t.ex. DFT) via samarbeten med både nationella och internationella grupper.
Mina forskningsprojekt är finansierade av Formas, Sveriges Geologiska Undersökning, och EU Botnia Atlantica.
Nedan är en exempel av mina forskningsprojekt presenteras populärvetenskapligt:
Mina pågående forskningsprojekt
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Projekt: Biokolets potential i ett cirkulärt jordbruk Syftet med det här projektet är att undersöka hur tillsats av biokol till odlingsjord kan påverka jordens förmåga att hålla kvar näringsämnen, fia…
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Projekt: Uranets mobilisering och redoxkemi i två boreala sulfidiska landskap Det övergripande syftet med projektet är att utforska och undersöka de biogeokemiska processer som styr frigörelse,…
Publikationer
Artikel i tidskrift (Refereegranskat)
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Yu, C., Luong, N.T., Hefni, M.E., Song, Z., Högfors-Rönnholm, E., et al. (2024). Storage and Distribution of Organic Carbon and Nutrients in Acidic Soils Developed on Sulfidic Sediments : The Roles of Reactive Iron and Macropores. Environmental Science and Technology. 58 (21). 9200-9212.
Status: Publicerad -
Hao, Q., Song, Z., Zhang, X., He, D., Guo, L., et al. (2024). Organic blue carbon sequestration in vegetated coastal wetlands : Processes and influencing factors. Earth-Science Reviews. 255.
Status: Publicerad -
Yu, C., Turner, S., Huotari, S., Chen, N., Shchukarev, A., et al. (2024). Manganese cycling and transport in boreal estuaries impacted by acidic Mn-rich drainage. Geochimica et Cosmochimica Acta. 365. 136-157.
Status: Publicerad -
Li, Q., Song, Z., Xia, S., Kuzyakov, Y., Yu, C., et al. (2024). Microbial Necromass, Lignin, and Glycoproteins for Determining and Optimizing Blue Carbon Formation. Environmental Science and Technology. 58. 468-479.
Status: Publicerad -
Zheng, X., Han, G., Song, Z., Liang, B., Yang, X., et al. (2024). Biogeochemical cycle and isotope fractionation of copper in plant-soil systems : a review. Reviews in Environmental Science and Biotechnology. 23. 21-41.
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Wu, L., Song, Z., Wu, Y., Xia, S., Kuzyakov, Y., et al. (2024). Organic matter composition and stability in estuarine wetlands depending on soil salinity. Science of the Total Environment. 945.
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Wu, Y., Zhang, X., Lin, J., Wang, X., Sun, S., et al. (2024). Silicon promotes biomass accumulation in Phragmites australis under waterlogged conditions in coastal wetland. Plant and Soil.
Status: Epub för tryck -
Zheng, X., Han, G., Zhang, Q., Liang, B., Liu, M., et al. (2023). Extreme Copper Isotope Fractionation Driven by Redox Oscillation During Gleysols Weathering in Mun River Basin, Northeast Thailand. Journal of Geophysical Research - Earth Surface. 128 (3).
Status: Publicerad -
Wu, Y., Zhang, X., Song, Z., Yu, C., Liu, M., et al. (2023). Climatic controls on stable carbon and nitrogen isotope compositions of temperate grasslands in northern China. Plant and Soil. 491. 133-144.
Status: Publicerad -
Nyman, A., Johnson, A., Yu, C., Dopson, M., Åström, M.E. (2023). Multi-element features of active acid sulfate soils across the Swedish coastal plains. Applied Geochemistry. 152.
Status: Publicerad -
Yu, C., Högfors-Rönnholm, E., Stén, P., Engblom, S., Åström, M.E. (2023). Iron‑sulfur geochemistry and acidity retention in hydrologically active macropores of boreal acid sulfate soils : Effects of mitigation suspensions of fine-grained calcite and peat. Science of the Total Environment. 856 (Part 2).
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Nyman, A., Johnson, A., Yu, C., Sohlenius, G., Becher, M., et al. (2023). A nationwide acid sulfate soil study : A rapid and cost-efficient approach for characterizing large-scale features. Science of the Total Environment. 869.
Status: Publicerad -
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Matson, J.G., Karimi, H., Yu, C., et al. (2022). Removal and potential recovery of dissolved metals from acid sulfate soil drainage by spent coffee-grounds and dissolved organic carbon. Environmental Advances. 8.
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Song, Z., Wu, Y., Yang, Y., Zhang, X., Van Zwieten, L., et al. (2022). High potential of stable carbon sequestration in phytoliths of China's grasslands. Global Change Biology. 28 (8). 2736-2750.
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Xia, S., Song, Z., Van Zwieten, L., Guo, L., Yu, C., et al. (2022). Storage, patterns and influencing factors for soil organic carbon in coastal wetlands of China. Global Change Biology. 28 (20). 6065-6085.
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Xie, S., Yu, C., Peng, B., Xiao, H., Zhang, W., et al. (2022). A re-assessment of metal pollution in the Dexing mining area in Jiangxi province, China : current status, hydro-geochemical controls, and effectiveness of remediation practices. International Journal of Environmental Science and Technology. 19. 10707-10722.
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Shahabi-Ghahfarokhi, S., Åström, M.E., Yu, C., Lindquist, T., Djerf, H., et al. (2022). Extensive dispersion of metals from hemiboreal acid sulfate soil into adjacent drain and wetland. Applied Geochemistry. 136.
Status: Publicerad -
Hao, Q., Ma, N., Song, Z., Zhang, X., Yang, X., et al. (2022). Soil silicon fractions along karst hillslopes of southwestern China. Journal of Soils and Sediments. 22. 1121-1134.
Status: Publicerad -
Shahabi-Ghahfarokhi, S., Rahmati-Abkenar, M., Jaeger, L., Josefson, S., Djerf, H., et al. (2022). The response of metal mobilization and redistribution to reoxygenation in Baltic Sea anoxic sediments. Science of the Total Environment. 837.
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Hao, Q., Yang, S., Song, Z., Wang, Z., Yu, C., et al. (2021). Vegetation Determines Lake Sediment Carbon Accumulation during Holocene in the Forest-Steppe Ecotone in Northern China. Forests. 12 (6).
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Sjöberg, S., Yu, C., Stairs, C.W., Allard, B., Hallberg, R., et al. (2021). Microbe-Mediated Mn Oxidation - A Proposed Model of Mineral Formation. Minerals. 11 (10).
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Yu, C., Xie, S., Song, Z., Xia, S., Åström, M.E. (2021). Reply to comments by Thilo Rennert on “Biogeochemical cycling of iron (hydr-)oxides and its impact on organic carbon turnover in coastal wetlands: A global synthesis and perspective”. Earth-Science Reviews (2021) 103658. Earth-Science Reviews. 221.
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Qin, Z., Yang, X., Song, Z., Peng, B., Van Zwieten, L., et al. (2021). Vertical distributions of organic carbon fractions under paddy and forest soils derived from black shales : Implications for potential of long-term carbon storage. Catena (Cremlingen. Print). 198. 1-8.
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Yang, X., Song, Z., Van Zwieten, L., Sun, X., Yu, C., et al. (2021). Spatial distribution of plant-available silicon and its controlling factors in paddy fields of China. Geoderma. 401.
Status: Publicerad -
Xia, S., Song, Z., Li, Q., Guo, L., Yu, C., et al. (2021). Distribution, sources, and decomposition of soil organic matter along a salinity gradient in estuarine wetlands characterized by C:N ratio, δ13C-δ15N, and lignin biomarker. Global Change Biology. 27 (2). 417-434.
Status: Publicerad -
Åström, M.E., Yu, C., Virtasalo, J.J., Österholm, P., Peltola, P., et al. (2020). Extensive accumulation of rare earth elements in estuarine sediments affected by leaching of acid sulfate soils. Boreal environment research. 25. 105-120.
Status: Publicerad -
Hao, Q., Yang, S., Song, Z., Ran, X., Yu, C., et al. (2020). Holocene carbon accumulation in lakes of the current east Asian monsoonal margin: Implications under a changing climate. Science of the Total Environment. 737. 1-13.
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Liu, L., Song, Z., Yu, C., Yu, G., M. Ellam, R., et al. (2020). Silicon Effects on Biomass Carbon and Phytolith-Occluded Carbon in Grasslands Under High-Salinity Conditions. Frontiers in Plant Science. 11. 1-13.
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Han, G., Yang, T., Man, L., Zwieten, L.V., Yang, X., et al. (2020). Carbon-nitrogen isotope coupling of soil organic matter in a karst region under land use change, Southwest China. Agriculture, Ecosystems & Environment. 301. 1-11.
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Xia, S., Song, Z., Van Zwieten, L., Guo, L., Yu, C., et al. (2020). Silicon accumulation controls carbon cycle in wetlands through modifying nutrients stoichiometry and lignin synthesis of Phragmites australis. Environmental and Experimental Botany. 175. 1-11.
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Hao, Q., Yang, S., Song, Z., Li, Z., Ding, F., et al. (2020). Silicon Affects Plant Stoichiometry and Accumulation of C, N, and P in Grasslands. Frontiers in Plant Science. 11. 1-10.
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Yu, C., Drake, H., Dideriksen, K., Tillberg, M., Song, Z., et al. (2020). A Combined X-ray Absorption and Mössbauer Spectroscopy Study on Fe Valence and Secondary Mineralogy in Granitoid Fracture Networks : Implications for Geological Disposal of Spent Nuclear Fuels. Environmental Science and Technology. 54 (5). 2832-2842.
Status: Publicerad -
Shilei, Y., Qian, H., Wang, H., Van Zwieten, L., Yu, C., et al. (2020). A review of carbon isotopes of phytoliths : implications for phytolith-occluded carbon sources. Journal of Soils and Sediments. 20 (4). 1811-1823.
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Yang, X., Song, Z., Qin, Z., Wu, L., Yin, L., et al. (2020). Phytolith-rich straw application and groundwater table management over 36 years affect the soil-plant silicon cycle of a paddy field. Plant and Soil. 454. 343-358.
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Yang, X., Song, Z., Yu, C., Ding, F. (2020). Quantification of different silicon fractions in broadleaf and conifer forests of northern China and consequent implications for biogeochemical Si cycling. Geoderma. 361. 1-10.
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Zhang, X., Song, Z., Hao, Q., Yu, C., Liu, H., et al. (2020). Storage of soil phytoliths and phytolith-occluded carbon along aprecipitation gradient in grasslands of northern China. Geoderma. 364. 1-9.
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Yu, C., Drake, H., Lopez-Fernandez, M., Whitehouse, M., Dopson, M., et al. (2019). Micro-scale isotopic variability of low-temperature pyrite in fractured crystalline bedrock ― A large Fe isotope fractionation between Fe(II)aq/pyrite and absence of Fe-S isotope co-variation. Chemical Geology. 522. 192-207.
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Yang, S., Hao, Q., Liu, H., Xiaodong, Z., Yu, C., et al. (2019). Impact of grassland degradation on the distribution and bioavailability of soil silicon: Implications for the Si cycle in grasslands. Science of the Total Environment. 657. 811-818.
Status: Publicerad -
Christel, S., Yu, C., Wu, X., Josefsson, S., Lillhonga, T., et al. (2019). Comparison of Boreal Acid Sulfate Soil Microbial Communities in Oxidative and Reductive Environments. Research in Microbiology. 170 (6-7). 288-295.
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Yu, C., Berger, T., Drake, H., Song, Z., Peltola, P., et al. (2019). Geochemical controls on dispersion of U and Th in Quaternary deposits, stream water, and aquatic plants in an area with a granite pluton. Science of the Total Environment. 663. 16-28.
Status: Publicerad -
Åström, M.E., Yu, C., Peltola, P., Reynolds, J.K., Österholm, P., et al. (2018). Sources, transport and sinks of beryllium in a coastal landscape affected by acidic soils. Geochimica et Cosmochimica Acta. 232. 288-302.
Status: Publicerad -
Yu, C., Boily, J., Shchukarev, A., Drake, H., Song, Z., et al. (2018). A cryogenic XPS study of Ce fixation on nanosized manganite and vernadite: Interfacial reactions and effects of fulvic acid complexation. Chemical Geology. 483. 304-311.
Status: Publicerad -
Yu, C., Drake, H., Mathurin, F.A., Åström, M.E. (2017). Cerium sequestration and accumulation in fractured crystalline bedrock : The role of Mn-Fe (hydr-)oxides and clay minerals. Geochimica et Cosmochimica Acta. 199. 370-389.
Status: Publicerad -
Yu, C., Peltola, P., Nystrand, M.I., Virtasalo, J.J., Österholm, P., et al. (2016). Arsenic removal from contaminated brackish sea water by sorption onto Al hydroxides and Fe phases mobilized by land-use. Science of the Total Environment. 542. 923-934.
Status: Publicerad -
Yu, C., Virtasalo, J.J., Österholm, P., Burton, E.D., Peltola, P., et al. (2016). Manganese accumulation and solid-phase speciation in a 3.5 m thick mud sequence from the estuary of an acidic and Mn-rich creek, northern Baltic Sea. Chemical Geology. 437. 56-66.
Status: Publicerad -
Nystrand, M.I., Österholm, P., Yu, C., Åström, M.E. (2016). Distribution and speciation of metals, phosphorus, sulfate and organic material in brackish estuary water affected by acid sulfate soils. Applied Geochemistry. 66. 264-274.
Status: Publicerad -
Berger, T., Yu, C., Drake, H., Peltola, P., Svensson, D., et al. (2016). Fluorine geochemistry of quaternary deposits in a nemo-boreal catchment with elevated dissolved fluoride in surface waters and groundwater. Journal of Geochemical Exploration. 170. 148-156.
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Yu, C., Virtasalo, J.J., Karlsson, T., Peltola, P., Osterholm, P., et al. (2015). Iron behavior in a northern estuary : Large pools of non-sulfidized Fe(II) associated with organic matter. Chemical Geology. 413. 73-85.
Status: Publicerad -
Peng, B., Rate, A., Song, Z., Yu, C., Tang, X., et al. (2014). Geochemistry of major and trace elements and Pb-Sr isotopes of a weathering profile developed on the Lower Cambrian black shales in central Hunan, China. Applied Geochemistry. 51. 191-203.
Status: Publicerad -
Yu, C., Lavergren, U., Peltola, P., Drake, H., Bergbäck, B., et al. (2014). Retention and transport of arsenic, uranium and nickel in a black shale setting revealed by a long-term humidity cell test and sequential chemica extractions. Chemical Geology. 363. 134-144.
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Xu, J., Peng, B., Yu, C., Yang, G., Tang, X., et al. (2013). Geochemistry of soils derived from black shales in the Ganziping mine area, western Hunan, China. Environmental Earth Sciences. 70 (1). 175-190.
Status: Publicerad -
Yu, C., Drake, H., Åström, M.E., Mathurin, F.A. (2013). Cerium Sequestration in Fractures in the Upper Kilometer of Granitoids, SE, Sweden. Mineralogical magazine. 77 (5). 2568-2568.
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Yu, C., Peng, B., Peltola, P., Xiaoyan Tang, T., Shurong, X. (2012). Effect of weathering on abundance and release of potentially toxic elements in soils developed on Lower Cambrian black shales, P. R. China. Environmental Geochemistry and Health. 34 (3). 375-390.
Status: Publicerad
Artikel, forskningsöversikt (Refereegranskat)
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Sandhi, A., Yu, C., Rahman, M.M., Amin, M.N. (2022). Arsenic in the water and agricultural crop production system : Bangladesh perspectives. Environmental Science and Pollution Research. Springer. 29. 51354-51366.
Status: Publicerad -
Yu, C., Xie, S., Song, Z., Xia, S., Åström, M.E. (2021). Biogeochemical cycling of iron (hydr-)oxides and its impact on organic carbon turnover in coastal wetlands : A global synthesis and perspective. Earth-Science Reviews. Elsevier. 218.
Status: Publicerad -
Li, Z., Song, Z., Yang, X., Song, A., Yu, C., et al. (2018). Impacts of silicon on biogeochemical cycles of carbon and nutrients in croplands. Journal of Integrative Agriculture. Elsevier. 17 (10). 2182-2195.
Status: Publicerad
Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
- Yu, C. (2014). Metal abundance and behavior in geo-materials affected by metal-sulfide oxidation. Doctoral Thesis. Linnaeus University Press. 46.
Konferensbidrag (Refereegranskat)
- Ketzer, J.M., Stranne, C., Chang, C., Owari, S., Yu, C., et al. (2024). Discovery of a major seafloor methane release site in Europe : The Landsort deep, Baltic Sea.. EGU General Assembly 2024.
- Yu, C., Drake, H., Dideriksen, K., Frandsen, C., Åström, M.E. (2017). Iron speciation and valence in the upper 1 km of fractured crystalline bedrock on the Baltic shield. Goldschmidt2017 Abstracts.
- Yu, C., Åström, M.E., Peltola, P., Drake, H. (2011). Oxidative weathering of black shale: A long-term humidity cell test. Goldschmidt Conference Abstracts. 2231-2231.
Manuskript (Övrigt vetenskapligt)
- Berger, T., Yu, C., Drake, H., Peltola, P., Svensson, D., et al. Fluorine geochemistry of Quaternary deposits in a nemo-boreal catchment with elevated dissolved fluoride in surface waters and groundwater.