Abstract
The objective of this study is the production and the characterization of rice husk biosorbent. In fact, the biosorbent has been obtained by phosphoric acid treatment; its physicochemicals characteristics such as point of zero charge, specific surface, iodine number and chemicals functions have been determined. The analysis indicaded that, the point of zero charge is 8.7; for the pH value less than 8.7, the biosorbent surface is posotively charged and for pH value higher than 8.7, the biosorbent surface is negatively charged. The biosorbent iodine number is 1560.87±1 mg/g, it means that, the biosorbent is constituted in majority of microspores. Furthermore, the specific surface of biosorbent is 104.45±1m2/g, it is five times as big than untreated rice husk obtained by Dada and al., (2012). Acid treatment improve the porosity of biosorbent. Infrarouge spectrum present ether and aromatic functions.
Highlights
Activated carbon is the most adsorbent used in adsorption process due to it extend surface area, its microporous structure and its high adsorption capacity
The material used in the production of biosorbent is essentially constitued by rice husk
We showed that it is possible to produce rice husk biosorbent by phosphoric acid treatment
Summary
Activated carbon is the most adsorbent used in adsorption process due to it extend surface area, its microporous structure and its high adsorption capacity. In the Far North Region of Cameroon, important quantities of rice husk (60000 tonnes) are product each year. These waste solids provided from rice growing practice in that Region and represent 20 % of the whole rice (Daifullah et al, 2003). In spite of their abundance, these rice husks are abandoned in the nature and polluted the environment. The advantages of the use of these waste solids are: The valorization of agro resources which are available, and low cost; The positive repercussions of activated carbon cost; The creation of geriatric activities jobs; The protection of environment
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