The effects of different factors on the removal mechanism of Pb(ii) by biochar-supported carbon nanotube composites.

Herein, biochar-supported nanomaterials were synthesized using a mixture of chestnut shells and carbon nanotubes slow pyrolysis at 600 °C for 1 h. Then, the adsorption ability of chestnut shell-carbon nanotubes (CS-CNTs) towards the removal of aqueous Pb(ii) was tested. The removal capacity of Pb(ii) by CS-CNT was 1641 mg g, which was significantly higher than that by the biochar of chestnut shells (CSs) (1568 mg g), which demonstrated that the sorption capacity could be improved by the carbon nanotubes.