Development of Enriched Biochar from Local Materials by Mixture Design Approach


Authors : HASSANA Boukar; DESOBGO ZANGUE Steve Carly; NGASSOUM Martin; BARKA Abakoura

Volume/Issue : Volume 7 - 2022, Issue 8 - August

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3Apr4QH

DOI : https://doi.org/10.5281/zenodo.7007147

The aim of the study was to produce enriched Biochar from local materials. The mixture design enabled to model and optimize the production of a highquality enriched biochar to be used as a bio fertilizer and/or a pollutant adsorbent. The choice was laid on three components bearing different attributes. These include lignocellulosic material (Ayous’ sawdust); a minerals source material (the clay of Wak) and a nitrogen source material (chicken manure). The three responses associated to this study were the pH, the iodine index and the cation exchange capacity. The optimization consisted in the inquiry of a maximum compound desirability. The mathematical model reveals a quadratic type for all responses. The pH and the cation exchange capacity were highly influenced by the chicken manure component, the iodine index by the sawdust component. The optimization revealed a pH preview value of 9.25 for desirability of 0.96, an iodine index of 794 m2 .g-1 for a desirability of 0.83, and a cation exchange capacity of 40.96 cmol+ .kg-1 for the desirability of 0.97. The global desirability of 0.96 showed that all components reach a favorable result, hence guaranteed the use of such biochar as bio fertilizer and/or as pollutant adsorbent.

Keywords : Enriched biochar; sawdust; clay, chicken manure; mixture design, optimization.

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