Characterization of biochars properties with benzene polycarboxylic acid biomarker
Chemical and physical properties biochars may be altered after their application in the environment.However,it is not applicable to separate biochar particles from soil particles,which hinders the evaluation of biochar properties and their functions after their application.Benzene polycarboxylic acids (BPCAs) have been used as biomarkers and provided useful information to describe the quantity and property of black carbon,and have been successfully applied in soils and sediments.It will be useful to obtain biochar properties through BPCAs biomarkers.In this study,we compared the characterization of biochars using elemental analysis and BPCAs biomarkers.Biochars were made from corn straw and pine sawdust.These biomasses were pyrolyzed at 4 different temperatures (200-500 ℃).Their elemental compositions and molecular biomarkers were determined.The content showed consistent results for elemental composition and biomarker analysis.The content of BPCAs increased with pyrolysis temperature.For example,BPCAs contents increased from 109 mg·g-t C to 426 mg·g-1 C for corn straw biochars,and BPCAs contents for pine sawdust biochars increased from 21 mg·g-1 C to 456 rag·g-1 C.The contents of B6CA in BPCAs were also increased with pyrolysis temperature.These results suggest that BPCAs content and distribution will provide useful information to understand biochar properties.Introducing BPCAs biomarkers in biochar technique will enhance our ability for biochar application and management.
NETL
NSTL
万方数据
维普
