Adsorption and flotation in one step: A new method for treating petroleum wastewater.

Developing process intensification technologies to treat Petroleum Wastewater (PW) is crucial to maintaining the economic and environmental safety of the process. Therefore, a one-step combination of adsorption and flotation was tested in this study for the first time to remove organic compounds from PW using a biochar-derived composite. High salinity PW samples from Brazilian oil wells were used to test the efficiency of the new method.

Biosorption of nickel and cadmium using Pachira aquatica Aubl. peel biochar.

This study aimed to assess the value of Pachira aquatica Aubl. fruit peels by exploring their applicability in the biosorption process for the removal of Ni(II) and Cd(II) metal ions. The Pachira aquatica Aubl.