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Biochar Addition Enhances Phenanthrene Fixation in Sediment

  • Ying-heng Fei
  • Yuxiao Chen
  • Chengshuai Liu
  • Tangfu Xiao
Article

Abstract

Biochar is believed to be promising for soil contaminant stabilization due to its large adsorption capacity. However, study in sediment is rare, especially with the aging effect. In the present study, a plant biomass-derived biochar was added to phenanthrene polluted sediment, in order to investigate its performance in sediment remediation. During the incubation period of 60 days, it was observed that the partition coefficient of phenanthrene increased in sediment either with or without biochar addition, as a result of aging process. Whilst, the biochar-added sediments showed much higher partition coefficients, as well as more curved adsorption isotherms, suggesting larger retention of the contaminant. Under the extreme extraction by strong surfactant, the release ratio of phenanthrene from polluted sediment was significantly reduced from 60% to 5% by 0.5% (w/w) addition of biochar. These results suggested that biochar would be applicable for improving the adsorption of organic pollutant in sediment, and the adsorbed organic pollutant would be stably fixed during aging as a result of the increased affinity.

Keywords

Adsorption Biochar Phenanthrene Fixation Sediment 

Notes

Acknowledgements

This study was funded by the National Natural Science Foundation of China (Grant Nos. 41473124, 41673138, 41830753), Special Fund for Agro-Scientific Research in the Public Interest of China (201503107-4), the One Hundred Talents Program of the CAS, the Science and Technology Planning Project of Guangdong Province (Grant Nos. 2014A020216001, 2016B020242006), and the Science and Technology Planning Project of Shenzhen City (Grant No. JCYJ20150521094519490).

Supplementary material

128_2018_2521_MOESM1_ESM.docx (55 kb)
Supplementary material 1 (DOCX 54 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and EngineeringGuangzhou UniversityGuangzhouChina
  2. 2.Guangzhou Institute of Advanced TechnologyChinese Academy of SciencesGuangzhouChina
  3. 3.Shenzhen Institute of Advanced TechnologyShenzhenChina
  4. 4.State Key Laboratory of Environmental Geochemistry, Institute of GeochemistryChinese Academy of SciencesGuiyangChina

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