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- W2789940574 abstract "Biochars with different Al contents (i.e., 5, 10, 15, and 20 wt%) were prepared to evaluate their adsorption capacities for nitrate (NO3-) and phosphate (PO43-) from eutrophic water. Several techniques, including N2 adsorption-desorption, X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectrometry, were applied to characterize the physical-chemical properties of the biochars. We found that the NO3- and PO43- adsorptions significantly improved on the Al-modified biochars because of their multifunctional and surface charge properties. In single-solute adsorption, 15 Al/BC and 20 Al/BC exhibited optimal NO3- and PO43- adsorption capacities, respectively. In bi-solute coadsorption, the PO43- adsorption on the biochar was less affected with the coexistence of NO3-, whereas the coexistence of PO43- had a significant impact on the NO3- adsorption. The optimal solution pH for NO3- adsorption was 6, and pH < 6 was advantageous to PO43- adsorption. In the kinetic study, the pseudo-second-order model could describe the NO3- and PO43- adsorptions on biochar well, indicating that chemical adsorption was the main adsorption mechanism. The Langmuir-Freundlich model agreed well with the NO3- and PO43- adsorptions on the biochars, and the maximum adsorption capacities for NO3- and PO43- reached 89.58 mg/g and 57.49 mg/g, respectively. Therefore, the Al-modified biochar was a good choice for the remediation of eutrophic water." @default.
- W2789940574 created "2018-03-29" @default.
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- W2789940574 date "2018-08-01" @default.
- W2789940574 modified "2023-10-17" @default.
- W2789940574 title "Evaluation of nitrate and phosphate adsorption on Al-modified biochar: Influence of Al content" @default.
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- W2789940574 doi "https://doi.org/10.1016/j.scitotenv.2018.03.091" @default.
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