1. [Characteristics of Phosphorus Adsorption in Aqueous Solution by Si-modified Peanut Shell Biochar]
- Author
-
Min, Zhao, Xiao-Ping, Zhang, and Liang-Rong, Wang
- Subjects
Kinetics ,Arachis ,Charcoal ,Spectroscopy, Fourier Transform Infrared ,Phosphorus ,Adsorption ,Water Pollutants, Chemical - Abstract
In this work, a novel sodium silicate-modified peanut shell biochar(Si-PSB) was synthesized and used as phosphorus adsorbents. Compared with unmodified biochar(PSB), the adsorption capacity of Si-PSBs increased significantly. The adsorption capacity of 8% sodium silicate solution modified biochar(8%Si-PSB) was 3.9 times higher than that of PSB. The biochar was characterized using scanning electron microscopy(SEM), Fourier transformed infrared(FTIR), and X-ray diffraction(XRD), which confirmed that silica was present on the surface of 8%Si-PSB. The introduction of silica improved the reaction activity of biochar's own metal ions by affecting the morphology of calcium carbonate. The 8%Si-PSB had a good adsorption effect on phosphorus in both acid and alkali environments. Phosphorus adsorption by 8%Si-PSB and PSB was described well by the pseudo-second-order model, and the adsorption capacity after equilibrium fluctuated between 2.79 mg·g
- Published
- 2021