Journal article
A review of biochar-based sorbents for separation of heavy metals from water
International Journal of Phytoremediation, Vol.22(2), pp.111-126
2020
PMID: 31686525
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Abstract
Biochar is the low-cost and environmental-friendly material which has shown a great potential for separation of heavy metals from water. The previous studies have established a superior role of biochar over other materials, such as activated carbon and inorganic sorbents (iron based) in efficient removal of toxic heavy metals from aqueous systems. Among the various factors influencing heavy metals sorption ability of biochar, types of feedstock/biomass and pyrolysis temperature play a significant role. The goal of this review is to increase our understanding of heavy metals sorption behavior by biochars - this is important as heavy metals sorption is driven based on biochar type, heavy metals species which involve numerous mechanisms, including the physical binding, complexation, ion exchange, surface precipitation and electrostatic interactions. In addition, this review paper describes various approaches to improve heavy metal sorption capacity of biochars by steam and acids/bases activations and impregnation of biochar-based composites with minerals, organic compounds and carbon-rich materials. The physical/chemical activation of biochars can improve the surface area, thus leading to their improved functionality, while modification/pretreatment methods help in synthesizing composites using biochar as a supporting media to develop new sorbents with efficient surface attributes for heavy metals removal from aqueous solutions.
Details
- Title
- A review of biochar-based sorbents for separation of heavy metals from water
- Creators
- Muhammad Bilal Shakoor - Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen City, Fujian, ChinaShafaqat Ali - Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, PakistanMuhammad Rizwan - Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, PakistanFarhat Abbas - Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, PakistanIrshad Bibi - Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, PakistanMuhammad Riaz - Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, PakistanUsman Khalil - Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, PakistanNabeel Khan Niazi - University of Agriculture FaisalabadJörg Rinklebe - University of Wuppertal
- Publication Details
- International Journal of Phytoremediation, Vol.22(2), pp.111-126
- Publisher
- Taylor & Francis Inc.
- Grant note
- The authors acknowledge the financial support from Higher Education Commission (HEC), Pakistan (Project no. 1430/SRGP/R&D/HEC/2016) and Government College University Faisalabad, Pakistan.
- Identifiers
- 991012951098902368
- Copyright
- © 2019 Taylor & Francis Group, LLC
- Academic Unit
- School of Environment, Science and Engineering; Science; Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article