“…Therefore, many groups have studied a diverse pool of natural (waste) products such as coconut shells, fruit seeds (grapes, pomegranate, date palm), olive and peach stones, wood wastes, pine cones, and more for the fabrication of ACs [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Other studies include composites of clay and carbonaceous materials [ 6 , 21 , 22 , 23 ]. For example, Okman and Karagöz et al [ 10 ] chemically activated grape seeds with potassium carbonate and potassium hydroxide before carbonization between 600 and 800 °C, resulting in materials with BET surface areas of up to 1238 m 2 /g (K 2 CO 3 ) and 1222 m 2 /g (KOH).…”