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Article Dans Une Revue Desalination and Water Treatment Année : 2021

Preparation and characterization of new adsorbents of pea and bean agricultural peels for water purification loaded with organic tryptophan compound

Résumé

The aim of the study was to find alternative materials that could contribute to the protection of the environment by the elimination of organic pollutant (tryptophan). The adsorbent materials (activated carbon) were prepared from pea and bean peels which were chemically treated with phosphoric acid and then treated physically by calcination. This synthesized material was used as an adsorbent for the purification of different waters charged with organic tryptophan compound. Agricultural residues were characterized by electronic microscopy and thermogravimetric analysis. The physical characterization was determined by adsorption of nitrogen gas at 77 K (BET). The impact of some process parameters was examined and analyzed, namely the initial concentration of pollutant, the dose of activated carbon and the dilution medium. The obtained results showed a low yield between 10% and 33% in the three types of water for coagulation-flocculation with aluminum sulfate alone. However, better removal efficiency was obtained by combination of aluminum sulfate and activated carbon between 70% to 90%, and elimination efficiency between 75% to 80% in combination with aluminum sulfate and activated carbon. Specific areas of pea and bean peels respectively 735.27, 760.56 m(2)/g, and the diameter of its pores respectively 58.42 and 52.88, make these adsorbent materials efficient, economical and effective for the removal of organic matter.

Domaines

Chimie
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Dates et versions

hal-03413967 , version 1 (04-11-2021)

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Abdelali Ouchene, Hinda Khelili, Messaoud Guellal, Nabila Zouaoui, Abdeltif Amrane. Preparation and characterization of new adsorbents of pea and bean agricultural peels for water purification loaded with organic tryptophan compound. Desalination and Water Treatment, 2021, 234, pp.206-221. ⟨10.5004/dwt.2021.27656⟩. ⟨hal-03413967⟩
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