In this study, sewage sludge-derived biochars (SSBs) were prepared at two pyrolysis temperatures of 450 degrees C (SSB450) and 600 degrees C (SSB600) for U(VI) removal. The maximum adsorption capacity of SSB450 and SSB600 was 43.13 and 47.47 mg g(-1), respectively, at initial pH of 3. While the adsorption process of U(VI) onto the SSBs were accurately described by the pseudo-second-order model and Langmuir isotherm model. Ion exchange and complexation were assumed as the adsorption mechanism. The adsorption-desorption experiment showed that both the U(VI) removal efficiency and SSB regeneratio...
