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- Title
Effects of Magnesium Impregnation on Stability and Sorption Performance of Biochar Derived from Sawdust and Corn Husks.
- Authors
Zhao Xu; Ting Chen; Zhuhong Ding; Xin Hu; Guangze Nie
- Abstract
Biochar was derived from MgCl2 and MgO pretreated sawdust and corn husks at 300 °C and 600 °C, respectively, to investigate the effects of exogenous minerals on the stability and sorption performance of the resulting biochar. Impregnation with Mg decreased carbon concentration, increased yield and ash concentration, and increased the pH values at the point of zero charge (pHPZC) of the resulting biochar. The chemical stability of biochar oxidized by K2CrO7 was enhanced with increasing pyrolysis temperature and decreased with the pretreatment of MgCl2 and MgO. Mgimpregnation enhanced carbon loss of the resulting biochar and increased the sorption capacity of biochar for CR significantly, which is potentially caused by electrostatic interaction and surface complexation. This study indicates that magnesium-impregnation significantly enhances the sorption performance of anionic contaminants and the pyrolysis temperature has a greater effect on the stability of the resulting biochar than the magnesium-impregnation.
- Subjects
MAGNESIUM oxide; THERMAL stability; SORPTION; CORNHUSK bags; CHEMICAL yield; TEMPERATURE effect
- Publication
BioResources, 2019, Vol 14, Issue 1, p289
- ISSN
1930-2126
- Publication type
Article
- DOI
10.15376/biores.14.1.289-301