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Pyrolysis temperature affects phosphorus transformation in biochar: Chemical fractionation and31P NMR analysis
Xu, Gang1; Zhang, You1,4; Shao, Hongbo1,2; Sun, Junna1,3; Shao, Hongbo (shaohongbochu@126.com)
2016-11-01
Source PublicationScience of the Total Environment
ISSN0048-9697
Volume569-570Pages:65-72
Contribution Rank(1) Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai; 264003, China; (2) Institute of Agro-biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing, China; (3) College of Life Science, Ludong University, Yantai; 264005, China; (4) University of Chinese Academy of Sciences, Beijing; 100049, China
AbstractPhosphorus (P) recycling or reuse by pyrolyzing crop residue has recently elicited increased research interest. However, the effects of feedstock and pyrolysis conditions on P species have not been fully understood. Such knowledge is important in identifying the agronomic and environmental uses of biochar. Residues of three main Chinese agricultural crops and the biochars (produced at 300 °C–600 °C) derived from these crops were used to determine P transformations during pyrolysis. Hedley sequential fractionation and31P NMR analyses were used in the investigation. Our results showed that P transformation in biochar was significantly affected by pyrolysis temperature regardless of feedstock (Wheat straw, maize straw and peanut husk). Pyrolysis treatment transformed water soluble P into a labile (NaHCO3-Pi) or semi-labile pool (NaOH-Pi) and into a stable pool (Dil. HCl P and residual-P). At the same time, organic P was transformed into inorganic P fractions which was identified by the rapid decomposition of organic P detected with solution31P NMR. The P transformation during pyrolysis process suggested more stable P was formed at a higher pyrolysis temperature. This result was also evidenced by the presence of less soluble or stable P species, such as such as poly-P, crandallite (CaAl3(OH)5(PO4)2) and Wavellite (Al3(OH)3(PO4)2·5H2O), as detected by solid-state31P NMR in biochars formed at a higher pyrolysis temperature. Furthermore, a significant proportion of less soluble pyrophosphate was identified by solution (2%–35%) and solid-state (8%–53%)31P NMR, which was also responsible for the stable P forms at higher pyrolysis temperature although their solubility or stability requires further investigation. Results suggested that a relatively lower pyrolysis temperature retains P availability regardless of feedstock during pyrolysis process.
KeywordCracking (Chemical)-agricultural Wastes Chemical Analysis Crops Decay (Organic) Feedstocks Phosphate Minerals Phosphorus Pyrolysis Water Treatment Bio Chars Chemical Fractionation Hedley Fraction Phosphorus Transformations Pyrolysis Temperature Pyrophosphate Salt Soils Sequential Fractionation
Department海岸带生物学与生物资源利用所重点实验室
Subject AreaEnvironmental Sciences & Ecology
DOI10.1016/j.scitotenv.2016.06.081
Funding OrganizationNational Natural Science Foundation of China 41573120 41001137 ; National Basic Research Program of China 2013CB430403 ; Shuangchuang Talent Plan of Jiangsu Province ; JiangsuAgricultural Science and Technology Innovation Fund CX(15)1005
WOS KeywordNUCLEAR-MAGNETIC-RESONANCE; SOIL-PHOSPHORUS; ORGANIC-CARBON; MANURE; AVAILABILITY; SPECIATION; NITROGEN; COMPOST; RELEASE; IMPACT
SubtypeJournal article
Language英语
WOS Research AreaWater Treatment Techniques ; Minerals ; Chemical Reactions ; Chemical Products Generally ; Agricultural Products ; Agricultural Wastes
WOS IDWOS:23
Citation statistics
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/17503
Collection海岸带生物学与生物资源保护实验室
Corresponding AuthorShao, Hongbo (shaohongbochu@126.com)
Affiliation1.Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences
2.Institute of Agro-biotechnology, Jiangsu Academy of Agricultural Sciences
3.College of Life Science, Ludong University
4.University of Chinese Academy of Sciences
First Author AffilicationYantai Institute of Coastal Zone Research, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu, Gang,Zhang, You,Shao, Hongbo,et al. Pyrolysis temperature affects phosphorus transformation in biochar: Chemical fractionation and31P NMR analysis[J]. Science of the Total Environment,2016,569-570:65-72.
APA Xu, Gang,Zhang, You,Shao, Hongbo,Sun, Junna,&Shao, Hongbo .(2016).Pyrolysis temperature affects phosphorus transformation in biochar: Chemical fractionation and31P NMR analysis.Science of the Total Environment,569-570,65-72.
MLA Xu, Gang,et al."Pyrolysis temperature affects phosphorus transformation in biochar: Chemical fractionation and31P NMR analysis".Science of the Total Environment 569-570(2016):65-72.
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