Abstract
The pinecone, solid waste was successfully converted into activated carbon using chemical agents H3PO4. There were carefully studied properties including porous structures, surface functional groups, and morphology structures. The N2 adsorption studies showed that the nitrogen isotherm exhibits Type IV, and the presence of a hysteresis loop clearly shows the predominantly mesoporous characteristics. The values of correlation coefficient R2 = 0.9999 represented the satisfactory pseudo-second-order model. The results show that pinecone-activated carbon was effectively used as an adsorbent.