Biochar synthesized via pyrolysis of Broussonetia papyrifera leaves: mechanisms and potential applications for phosphate removal

  • Guoqiang Qiu
  • Yunlin ZhaoEmail author
  • Hui Wang
  • Xiaofei Tan
  • Fangxu Chen
  • Xinjiang HuEmail author
Research Article


In this study, Broussonetia papyrifera leaves collected from land near a restored manganese mine in the Hunan Province of China were converted into biochar under high-temperature anaerobic conditions, regeneration and utilization of agricultural and forest waste, and applied to the prevention of eutrophication. The physicochemical properties of the B. papyrifera biochar were characterized using Micromeritics 3Flex analyzer, scanning electron microscope (SEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric analyzer (TGA), X-ray photoelectron spectrometer (XPS), zeta potential meter (zeta), and X-ray diffraction (XRD). The effects of pH, ionic strength, coexisting ions, time, initial concentration, and temperature on the decontamination process of phosphate in water were studied. The results indicated that adsorption was enhanced under alkaline conditions. The pseudo-second-order model of adsorption kinetics was applied to illustrate the adsorption processes. The chemical adsorption reaction was the main rate-limiting step in the adsorption process. Isotherm experimental data were best fitted by the Freundlich model at 25 °C and by the Langmuir model at 35 °C. The phosphate combined with B. papyrifera biochar mainly in the forms of exchangeable phosphorus (Ex-P), Al-bound phosphorus (Al-P), and Fe-bound phosphorus (Fe-P). These results indicate that B. papyrifera biochar is a suitable candidate for the treatment of a eutrophic body of water.


Biochar Phosphate adsorption Eutrophication Recycling Restored manganese mine land 



This study was financially supported by the China Postdoctoral Science Foundation (Grant No. 2017M610513), the National Natural Science Foundation of China (Grant No. 51608208), the Major Science and Technology Program of Hunan Province (Grant No. 2017NK1010), the Natural Science Foundation of Hunan Province (Grant Nos. 2018JJ3887 and 2018JJ3096), and the Research Foundation of Education Department of Hunan Province, China (Grant No. 17K105).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of Life Science and TechnologyCentral South University of Forestry and TechnologyChangshaPeople’s Republic of China
  2. 2.College of Environmental Science and EngineeringCentral South University of Forestry and TechnologyChangshaPeople’s Republic of China
  3. 3.Institute of Bast Fiber CropsChinese Academy of Agricultural SciencesChangshaPeople’s Republic of China
  4. 4.College of Environmental Science and EngineeringHunan UniversityChangshaPeople’s Republic of China
  5. 5.Key Laboratory of Environmental Biology and Pollution Control (Hunan University)Ministry of EducationChangshaPeople’s Republic of China

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