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Insights into the effect of chemical treatment on the physicochemical characteristics and adsorption behavior of pig manure-derived biochars

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Abstract

Chemical treatment could improve the adsorption performance of biochars (BC). In order to deal with Pb(II) pollution, four types of biochars including unmodified, acid-treated, alkali-treated, and magnetic-treated pig manure-derived biochars (PBCs) were prepared. The effect of chemical treatment on the physical property, chemical composition, and the adsorption behavior of biochars was compared. Magnetic and alkali treatment improved pore volume and specific surface areas, and the adsorption capacity and rates were enhanced. In contrast, the adsorption capacity of acid-treated BC decreased due to the significant decrease of ash content. The magnetic samples displayed the satisfactory absorption performance, which could achieve 99.8% removal efficiency within 15 min at a Pb(II) concentration of 50 mg/L. Considering its properties of excellent adsorption performance, fast reaction rate, and convenient recovery by an external magnetic field, magnetic biochar based on pig manure may provide an effective way to remove heavy metals and decrease the pig manure solid waste.

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Acknowledgements

This study was financially supported by the Program for the National Natural Science Foundation of China (51879101, 51579098, 51779090, 51709101, 51521006, 51809090, 51278176, 51378190), the National Program for Support of Top–Notch Young Professionals of China (2014), the Program for Changjiang Scholars and Innovative Research Team in University (IRT-13R17), and Hunan Provincial Science and Technology Plan Project (No.2016RS3026, 2017SK2243, 2018SK20410), and the Fundamental Research Funds for the Central Universities (531109200027, 531107051080, 531107050978).

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Correspondence to Dan-Lian Huang or Yun-Guo Liu.

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The authors declare that they have no conflict of interest.

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Responsible editor: Philippe Garrigues

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Wang, RZ., Huang, DL., Zhang, C. et al. Insights into the effect of chemical treatment on the physicochemical characteristics and adsorption behavior of pig manure-derived biochars. Environ Sci Pollut Res 26, 1962–1972 (2019). https://doi.org/10.1007/s11356-018-3772-6

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  • DOI: https://doi.org/10.1007/s11356-018-3772-6

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