Pyrolysis Temperature-Dependent Changes in the Characteristics of Biochar-Borne Dissolved Organic Matter and Its Copper Binding Properties

  • Jing Wei
  • Chen Tu
  • Guodong YuanEmail author
  • Dongxue Bi
  • Hailong Wang
  • Lijuan Zhang
  • Benny K. G. Theng


The dissolved organic matter (DOM) samples from biochars produced from Jerusalem artichoke stalks by pyrolysis at 300, 500, and 700 °C were characterized using a combination of spectroscopic techniques. Additionally, the binding affinities (long KM) and the complexation capacities (CL) of the DOM samples with Cu(II) were calculated to assess their Cu binding properties. The biochar-borne DOM contained mainly humic-like components (C1–C3) with a small amount of a protein-like component (C4). As the charring temperature increased, the concentrations of released DOM decreased. The low temperature biochar-borne DOM was found to have more carboxyl groups than its high temperature counterparts, and thus it had larger CL values. In contrast, the high temperature biochar-borne DOM had larger long KM values. Low temperature biochars, if applied in a large quantity, would alter copper mobility in the environment because of their high DOM contents and large copper binding capacities.


Biochar DOM EEM PARAFAC C K-NEXAFS Copper-binding 



This research was supported by the National Natural Science Foundation of China (41501522), the Chinese National Key Research and Development Program (2016YFD0200303 and 2016YFE0106400), and the National High Technology Research and Development Program (2012AA06A204-4).


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Authors and Affiliations

  1. 1.Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC)Chinese Academy of Sciences (CAS)YantaiChina
  2. 2.Shandong Provincial Key Laboratory of Coastal Environmental ProcessesYICCASYantaiChina
  3. 3.School of Environmental and Chemical EngineeringZhaoqing UniversityZhaoqingChina
  4. 4.School of Environment and Chemical EngineeringFoshan UniversityFoshanChina
  5. 5.Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghaiChina
  6. 6.Landcare ResearchPalmerston NorthNew Zealand

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