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Biochar as adsorbent in purification of clear-cut forest runoff water:adsorption rate and adsorption capacity

Biochar 2020年第2期2卷 227-237页

作者： Taija Saarela Elham Kakaei Lafdani Ari Laurén Jukka Pumpanen marjo palviainen Department of Environmental and Biological Sciences University of Eastern FinlandYliopistonranta 1 EFI-70210 KuopioFinland School of Forest Sciences University of Eastern FinlandYliopistokatu 7FI-80101 JoensuuFinland Department of Forest Sciences University of HelsinkiLatokartanonkaari 7FI-00014 HelsinkiFinland

Forest management practices in boreal peatlands increase nutrient export and suspended solids to watercourses calling for development of new water protection *** potential solution could be adsorption-based purification of runoff water using *** aim of this study was to determine the adsorption rate and capacity for Norway spruce and silver birch biochars to design a biochar-filled reactor for a ditch *** a 10-day laboratory experiment,biochar was stirred with runoff water from a clear-cut peatland forest,and changes in water pH,total nitrogen,nitrate nitrogen,ammonium nitrogen,phosphorus,and total organic carbon concentrations were *** on the concentration changes,adsorption was quantified and adsorption model containing the adsorption rate and capacity was fitted to the *** results indicate that biochar effectively adsorbs both inorganic and organic nitrogen from runoff *** biochar had higher adsorption capacity of nitrogen than spruce *** study demonstrates that the adsorption of nitrogen compounds onto biochar surfaces increases with increasing initial ***,aquatic ecosystems exposed to high nutrient loads from fertile peatlands would particularly benefit from biochar-based water purification.

关键词： Adsorption Ammonium Biochar Nitrate Nutrients Total nitrogen Water quality

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Response of soil bacterial community to biochar application in a boreal pine forest

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Journal of Forestry Research 2023年第3期34卷 749-759页

作者： Yan Ge Xiao-li Li marjo palviainen Xuan Zhou Jussi Heinonsalo Frank Berninger Jukka Pumpanen Kajar Köster Hui Sun Collaborative Innovation Center of Sustainable Forestry in Southern China College of ForestryNanjing Forestry UniversityNanjing 210037China Department of Forest Sciences University of HelsinkiLatokartanonkaari 7P.O.Box 2700014 HelsinkiFinland Department of Environmental and Biological Sciences University of Eastern FinlandYliopistonranta 1 EP.O.Box 162770211 KuopioFinland

Boreal forests commonly suff er from nitrogen defi ciency due to low rate of nitrogen *** may promote soil organic matter decomposition and accelerate nitrogen *** this study,Illumina NovaSeq sequencing combined with functional annotation of prokaryotic taxa(FAPROTAX)analysis was used to investigate the eff ect of biochar pyrolysis temperatures,the amount of applied biochar,and the period since the biochar application(2-and 3-year)on soil bacterial *** results show that biochar pyrolysis temperatures(500℃ and 650℃)and the amount of applied biochar(0.5 kg m^(−2)and 1.0 kg m^(−2))did not change soil ***,the interaction of biochar pyrolysis temperature and the amount had signifi cant eff ects on bacterial species richness and evenness(P<0.05).The application of biochar produced at 500℃ had a lower abundance of Actinobacteria and Verrucomicrobia,while that produced at 650℃ had a higher abundance of Conexibacter and *** biochar produced at 650℃ was applied,applying 0.5 kg m^(−2)had a higher abundance of Cyanobacteria,Conexibacter,and Phenylobacterium than that of 1.0 kg m^(−2)(P<0.05).Functionally,the abundance of the aromatic compound degradation group increased with the extension of application time and increase of pyrolysis *** time since application played an important role in the formation of soil bacterial communities and their functional ***-term studies are necessary to understand the consequence of biochar on bacterial communities in boreal forests.

关键词： Biochar application Bacterial communities Community function Boreal pine forests

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