Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8098908 | Journal of Cleaner Production | 2018 | 11 Pages |
Abstract
Water eutrophication is a serious environmental problem worldwide. Biochar derived from the thermochemical treatment of biomass, particularly the modified biochar, can be used as a new type of adsorbent for environmental management. In this study, Mg-Al-modified soybean straw biochars (Mg/BC, Al/BC, and Mg-Al/BC) were prepared to remove NH4+, NO3â, and PO43â from eutrophic water. Brunauer-Emmett-Teller analysis, X-ray diffraction spectroscopy, scanning electron microscopy, and Fourier transform infrared techniques were used to characterize the physical and chemical properties of the biochar. The single-solute-adsorption properties and adsorption kinetics of NH4+, NO3â, and PO43â were initially examined. Results showed that the maximum adsorption capacities for NH4+ (0.70Â mg/g), NO3â (40.63Â mg/g), and PO43â (74.47Â mg/g) were achieved on Mg-Al/BC, Al/BC, and Mg/BC, respectively. The bi-solute-coadsorption and tri-solute-coadsorption properties of NH4+, NO3â, and PO43â were then studied to simulate the adsorption in actual eutrophic water. Mg/BC and Al/BC can be used to treat eutrophic water contaminated with PO43â and NO3â, respectively. Mg-Al/BC could effectively improve the quality of water whereNH4+, NO3â, and PO43â coexist. Therefore, the Mg-Al-modified biochars can be used as an excellent adsorbent for the treatment of eutrophic water.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Qianqian Yin, Ruikun Wang, Zhenghui Zhao,