M., K. Bechki1,2*A., Lounas1L, Bechki2,, Zerrouk3, L, Bensaci H2023-03-212023-03-212018-05-01M. K. Bechki1,2*, A. Lounas1, L. Bechki2, L .Zerrouk3, H. Bensaci1 . PREPARATION OF CHEMICALLY ACTIVE CARBONS BY HYDROCHLORIC ACID BASED ON NUT SHELLS. Journal of Fundamental and sciences. vol.10, no 2. May 2018. Faculty of exact sciences. university of el oued. [visited in23/01/2018]. available from [http://www.jfas.info]http://dspace.univ-eloued.dz/handle/123456789/17797ARTICALThe objective of this study is the valorization of the agricultural waste (nut shells) by preparing an active carbon from these wastes using the activating agent HCl 37%. The yields of the prepared active carbons were in the range 27.81 and 31.02 %. The influences of calcination temperatures in the range (550°C, 650°C and 750°C) on the adsorbent properties were studied. The overall results obtained indicated that the best maximum adsorption capacity of phenol was 26.31 mg/g, and the low capacity was 20.83 mg/g. In addition the maximum specific surface was 87.89 m²/g and the minimum was 69.588 m²/g respectively for the samples: CA0-550, CA1- 650 and CA2-750.ennut shells; active carbon; phenol; adsorption; specific surfaceArticle