Carbon nanotubes from waste cooking palm oil as adsorbent materials for the adsorption of heavy metal ions. - Abu Bakar S; Jusoh N; Mohamed A; Muqoyyanah M; Othman MHD; Mamat MH; Ahmad MK; Mohamed MA; Azlan MN; Hashim N; Birowosuto MD; Soga T (Environmental science and pollution research international, 2021)