期刊
BIORESOURCE TECHNOLOGY
卷 160, 期 -, 页码 123-128出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2014.01.006
关键词
Functional groups; Mobility; Soil amendment; Peat; Pyrolysis
资金
- National Scientific Foundation of China [41173124, 41222025]
- Program for New Century Excellent Talents in University
- Chinese Ministry of Education
- Recruitment Program of Highly-Qualified Scholars in Yunnan [2010CI109]
- Research Grant for Future Talents of Yunnan Province
- Research Fund for Senior Visiting Scholar at State Key Laboratory of Pollution Control and Resource Reuse [PCRRF11032]
A sediment sample with organic matter higher than 60% was thermally treated and the sorption of Cu(II), Cd(II), and Pb(II) was investigated and compared to evaluate the potential use of sediments with high organic matter content to produce biochar. Cu(II) and Cd(II) sorption generally decreased with increasing pyrolysis temperature, concurred with decreased oxygen-containing functional groups of the adsorbents. Sediment particles pyrolyzed at 400 and 500 degrees C showed higher sorption to Pb(II) than other temperatures. The small hydrated ionic radius of Pb(II) may enable its close contact with solid particles and thus facilitated the diffusion of Pb(II) into the pores and the formation of cation-pi bond with aromatic structures generated by pyrolysis. The sorption of heavy metals in thermally treated sediment showed comparable sorption to or higher sorption than natural adsorbents and biochars from biomass, suggesting their possible significant impact on the transport and risk of heavy metals. (C) 2014 Elsevier Ltd. All rights reserved.
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