首页|Selected dark sides of biomass-derived biochars as environmental amendments

Selected dark sides of biomass-derived biochars as environmental amendments

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
  • 维普
With the rapid increase in the application of biochars as amendments,studies are needed to clarify the possible environmental risks derived from biochars to use safely the biomass resources.This work reported selected dark sides of maize straw-and swine manurederived biochars pyrolyzed at 300 and 500℃C.During the pyrolysis processes,total heavy metals in the biochars were enriched greatly accompanying with considerable emission of the heavy metals into atmosphere and the trends became increasingly obvious with pyrolysis temperature.Meanwhile,the biochars showed distinctly decreased available heavy metals compared with raw feedstocks,which could be mainly attributed to the sorption by the inorganics in the biochars.The water-and acid-washing treatments significantly increased the releasing risks of heavy metals from biochars into the environments.Electron paramagnetic resonance analysis indicated that persistent free radicals,emerged strongly in the biochars as a function of the aromatization of biomass feedstocks,were free from the influence of water-,acid-,or organic-washing of the biochars and could remain stable even after aged in soils for 30 days.Dissolved biochars,highly produced during pyrolysis processes,showed distinct properties including lower molecular weight distribution while higher aromaticity compared with soil dissolved organic carbon.The results of this study provide important perspectives on the safe usage of biochars as agricultural/environmental amendments.

BiocharSwine manureHeavy metalFree radicalDissolved biochar

Zien Chen、Lei Luo、Diyi Xiao、Jitao Lv、Bei Wen、Yibing Ma、Shuzhen Zhang

展开 >

State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China

Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China

work was supported by the Strategic Priority Research Program of the Chinese Academy of SciencesNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinaand the National Basic Research Program (973) of China

XDB1402020241471269212771572014CB441102

2017

环境科学学报(英文版)
中科院生态环境研究中心

环境科学学报(英文版)

CSTPCDCSCDSCIEI
影响因子：0.862
ISSN：1001-0742
年,卷(期)：2017.54(4)
  • 1
  • 1