苯多酸分子标志物法对NaClO氧化前后生物炭的性质描述

doi:10.11896/cldb.18040085

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Abstract Exemplified by nine polycyclic aromatic hydrocarbons (PAHs) and four pure compounds, the process of HNO₃ oxidation of biochar to produce benzene polycarboxylic acids (BPCAs) molecular markers was investigated. It had been proved that BPCAs could be adopted to describe the carbon black or condensed organic matter in the environment quantitatively and qualitatively. Then, biochar was prepared from cellulose (CE) and lignin (LG) at different temperatures (0—500 ℃). The variations of BPCAs information before and after NaClO oxidation were analyzed and compared by conventional physicochemical characterization. The results indicated that the total content of BPCAs and the relative content of benzene hexacarboxylic acid (B6CA) increased with the increasing preparation temperature of biochars, which meant that the condensation degree of biochar increased with the increasing temperature and the condensation degree of lignin biochar was higher than that of cellulose biochar at the same temperature. NaClO oxidation resulted in a BPCAs mass loss of 1.8%—79.3% in biochar, while there was no obvious change of BPCA proportion in each individual monomer, indicting that NaClO oxidation would not alter the distribution pattern of BPCAs in biochar. Both the ratios of benzene pentacarboxylic acid / benzene hexacarboxylic acid (B5CA/B6CA) and benzene hexacarboxylic acid / benzene tetracarboxylic acid (B6CA/B4CAs) were employed to discriminate the source of environmental carbon black, and the denoted same biochars sources before and after NaClO oxidation confirmed that BPCAs method is highly reliable in identifying biochar sources in the environment.

Key words： benzene polycarboxylic acid biomakers polycyclic aromatic hydrocarbons (PAHs) stoichiometry biochar sodium hypochlorite (NaClO) oxidation

Published: 31 May 2019

CLC number:

X13

Fund:This work was financially supported by the National Natural Science Foundation of China (41663013, 41473116).

About author:: Zhaofeng Chang,Ph.D. candidate. He received his bachelors degree from Shihezi University in 2014, and entered Kunming University of Science and Technology for his masters degree in September. In September 2015, he changed to be a master-doctor student. His research interests focus on the preparation and application of biochar and the soil carbon cycle. Up to now, he has published 8 journal papers including 4 SCI papers and participated in 5 projects of Natural Science Foundation of China.Min Wu,professor and doctoral supervisor of Kunming University of Science and Technology. She received masters degree in Peking University in 2005 and Ph.D. degree in Kunming University of Science and Technology in 2012. From 2014 to 2015, she worked as a postdoctoral researcher at the university of Massachusetts. The bilingual course “environmental toxicology” was selected as the bilingual demonstration course in Yunnan. In recent work, she focused on studying of the environmental behavior mechanism of organic pollutants. She presided 3 Natural Scie-nce Foundations and participated in several national and provincial level projects. She has published more than 60 papers, of which 31 were collected by SCI and translated one book.

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	CHANG Zhaofeng
	TIAN Luping
	LIANG Ni
	ZHANG Pengchao
	ZHOU Dandan
	ZHANG Jun
	WU Min1

Cite this article:

CHANG Zhaofeng,TIAN Luping,LIANG Ni, et al. Characterization of Biochar Properties Before and After NaClO Oxidation byMolecular Markers of Benzene Polycarboxylic Acids[J]. Materials Reports, 2019, 33(12): 2089-2094.

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http://www.mater-rep.com/EN/10.11896/cldb.18040085 OR http://www.mater-rep.com/EN/Y2019/V33/I12/2089

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