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Open AccessArticle

Single and Competitive Adsorption Behaviors of Cu2+, Pb2+ and Zn2+ on the Biochar and Magnetic Biochar of Pomelo Peel in Aqueous Solution

1
Department of Environmental Science and Engineering, School of Geography and Tourism, Shaanxi Normal University, Xi’an 710119, China
2
Shangluo City Meteorological Bureau, Shangluo 726000, China
*
Author to whom correspondence should be addressed.
Academic Editor: Laura Bulgariu
Water 2021, 13(6), 868; https://doi.org/10.3390/w13060868
Received: 20 February 2021 / Revised: 16 March 2021 / Accepted: 17 March 2021 / Published: 23 March 2021
(This article belongs to the Section Wastewater Treatment and Reuse)
As an environment-friendly material, biochar has been used to remove heavy metals from wastewater, and the development of cost-effective biochar has been an emerging trend. However, limited studies consider the competitive adsorption of co-existing metals and the separation efficiency of absorbent and solution after adsorption. In this study, pomelo peel was used to prepare biochar (BC) and magnetic biochar (MBC) at different temperatures. Then, the physicochemical properties of the biochars were characterized and the adsorption characteristics of Cu2+, Pb2+, and Zn2+ on the biochars in single, binary, and ternary metal systems were investigated. The results showed that both pyrolysis temperature and magnetization could affect the adsorption capacity of biochar. The adsorption kinetic and thermodynamic processes could be well described by the pseudo-second-order kinetic model and Langmuir model. The adsorption isotherm types of Pb2+ and Zn2+ changed in the binary metal condition. The competitive adsorption order of three heavy metal ions in ternary metal adsorption was Pb2+ > Cu2+ > Zn2+. The MBC of 500 °C showed a good adsorption capacity to Pb2+ in the co-existing environment, and the maximum adsorption capacity was 48.74 mmol g−1. This study also provided technical support for the utilization of pomelo peel and the engineering application of biochar. View Full-Text
Keywords: biochar; magnetic biochar; bivalent metal; adsorption; possible mechanism biochar; magnetic biochar; bivalent metal; adsorption; possible mechanism
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MDPI and ACS Style

Wu, Q.; Dong, S.; Wang, L.; Li, X. Single and Competitive Adsorption Behaviors of Cu2+, Pb2+ and Zn2+ on the Biochar and Magnetic Biochar of Pomelo Peel in Aqueous Solution. Water 2021, 13, 868. https://doi.org/10.3390/w13060868

AMA Style

Wu Q, Dong S, Wang L, Li X. Single and Competitive Adsorption Behaviors of Cu2+, Pb2+ and Zn2+ on the Biochar and Magnetic Biochar of Pomelo Peel in Aqueous Solution. Water. 2021; 13(6):868. https://doi.org/10.3390/w13060868

Chicago/Turabian Style

Wu, Qianlan; Dong, Shuzhen; Wang, Lijun; Li, Xiaoyun. 2021. "Single and Competitive Adsorption Behaviors of Cu2+, Pb2+ and Zn2+ on the Biochar and Magnetic Biochar of Pomelo Peel in Aqueous Solution" Water 13, no. 6: 868. https://doi.org/10.3390/w13060868

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