Xiang Lu

• Lu, Xiang; Clayer, Francois; Dörsch, Peter; Hessen, Dag Olav; Brandt, Uta & Ippach, Mats Rouven [Vis alle 8 forfattere av denne artikkelen] (2026). In-Lake GHG Production Constrained by Lake DOM Mass Balance in a Boreal Catchment. Water Resources Research. ISSN 0043-1397. 62(5). doi: 10.1029/2025WR041297. Fulltekst i vitenarkiv
• Xiong, Ling; Aldahan, Ala; He, Peng; Lu, Xiang; Ji, Yuan & Yi, Peng [Vis alle 8 forfattere av denne artikkelen] (2025). Impact of water diversion practices on spatiotemporal changes in hydrologic and hydrochemical landscapes of surface and groundwater. CATENA. ISSN 0341-8162. 249. doi: 10.1016/j.catena.2024.108661. Fulltekst i vitenarkiv
• Lin, Jie; Zhou, Xiaotian; Lu, Xiang; Xu, Yaofei; Wei, Zhipeng & Ruan, Aidong (2023). Grain size distribution drives microbial communities vertically assemble in nascent lake sediments. Environmental Research. ISSN 0013-9351. 227. doi: 10.1016/j.envres.2023.115828. Fulltekst i vitenarkiv
• Shi, Yingying; Wei, Zhipeng; Xu, Yaofei; Lu, Xiang & Ruan, Aidong (2023). Effects of electrochemical intervention on the remediation of black-odorous water: insights into microbial community dynamics and functional shifts in sediments. Water Science and Technology. ISSN 0273-1223. 87(11), s. 2776–2792. doi: 10.2166/wst.2023.169. Fulltekst i vitenarkiv Vis sammendrag

  Black-odorous water is a severe environmental issue that has received continuous attention. The major purpose of the present study was to propose an economical, practical, and pollution-free treatment technology. In this study, the in situ remediation of black-odorous water was conducted by applying different voltages (2.5, 5, and 10 V) to improve oxidation conditions of the surface sediments. The study investigated the effects of voltage intervention on water quality, gas emissions, and microbial community dynamics in surface sediments during the remediation process. The results indicated that the voltage intervention can effectively increase the oxidation–reduction potential (ORP) of the surface sediments and inhibit the emissions of H2S, NH3, and CH4. Moreover, the relative abundances of typical methanogens (Methanosarcina and Methanolobus) and sulfate-reducing bacteria (Desulfovirga) decreased because of the increase in ORP after the voltage treatment. The microbial functions predicted by FAPROTAX also demonstrated the inhibition of methanogenesis and sulfate reduction functions. On the contrary, the total relative abundances of chemoheterotrophic microorganisms (e.g., Dechloromonas, Azospira, Azospirillum, and Pannonibacter) in the surface sediments increased significantly, which led to enhanced biochemical degradability of the black-odorous sediments as well as CO2 emissions.

Se alle arbeider i NVA

• Lu, Xiang (2026). Boreal lakes as mediators for terrestrial organic carbon processing and greenhouse gas emissions: a case study from Langtjern Norway. Universitetet i Oslo. Fulltekst i vitenarkiv Vis sammendrag

  Boreal lakes receive and process substantial inputs of terrestrial derived dissolved organic matter (DOM), yet few studies systematically investigate their carbon dynamics and greenhouse gas (GHG) emission. This thesis integrated long-term empirical datasets, in‑situ high‑frequency monitoring, intensive field campaigns, dark incubations, and stable carbon isotope analyses to study the carbon mass balance and dynamics in lake Langtjern and assess its source-sink function in the catchment carbon budget. We found terrestrial DOM input drives in-lake DOM levels whereas water residence time governs DOM removal rates. The lake is a substantial source of GHGs, and its carbon evasion is dominated by CO2 (>99%) with CH4 < 1%. In‑lake CO2 production is the primary source of emitted CO2, and sediment respiration is the largest contributor. The microbial mineralization rate of lake DOM is driven by temperature, and regulated by solar radiation and C:N of DOM. We anticipate the influence of wetting (negative) may outweigh that of warming (positive) in regulating lake DOM removal rate. The increasing hydrological flushing could shift sediments from carbon sink to carbon source. Extreme rainfall events can substantially increase lake GHG emissions by promoting lake mixing. Under a wetter climate, catchment soil can be a net carbon source.

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