Effects of Wet Oxidation Process on Biochar Surface in Acid and Alkaline Soil Environments.

ABSTRACT: Biochar has been studied for remediation of heavy metal-contaminated soils by many researchers. When in external conditions, biochar in soils ages, which can transform its structural properties and adsorption capacity. This study was conducted with two oxidation processes, HNO₃/H₂SO₄ and NaOH/H₂O₂, to simulate the effects of biochar in acid and alkaline soil conditions. The results show that the oxygen-containing functional groups increased in aged biochar, which led to improve the ratio of oxygen and carbon (O/C). Nitro functional groups were found in the acid-oxidation treated biochar. Destroyed ditches and scars were observed on the surface of aged biochar and resulted in growth in their specific surface area and porosity. Specific surface area increased by 21.1%, 164.9%, and 63.0% for

SUBMITTER: Fan Q 

PROVIDER: S-EPMC6317012 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature