Valorization of Rice Husk and Straw Agriculture Wastes of Eastern Saudi Arabia: Production of Bio-Based Silica,Lignocellulose, and Activated Carbon |
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| Authors: | Hisham S. M. Abd-Rabboh Khaled F. Fawy Mohamed S. Hamdy SeragEldin I. Elbehairi Ali A. Shati Mohammad Y. Alfaifi Hala A. Ibrahium Saad Alamri Nasser S. Awwad |
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| Affiliation: | 1.Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (K.F.F.); (M.S.H.); (N.S.A.);2.Department of Biology, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia; (A.A.S.); (M.Y.A.); (H.A.I.); (S.A.) |
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| Abstract: | Bio-based silica, lignocellulose, and activated carbon were simply produced via the recycling of Hassawi rice biomass waste of Al-Ahsa governorate in the eastern Saudi Arabia region using a fast chemical treatment procedure. Rice husk and rice straw wastes were collected, ground, and chemically treated with sodium hydroxide to extract silica/silicate from the dried plant tissues. The liquid extract is then treated with acid solutions in order to precipitate silica/silicate at neutral medium. Lowering the pH of the supernatant to 2 resulted in the precipitation of lignocellulose. Thermal treatment of the biomass residue under N2 gas stream resulted in activated carbon production. Separated products were dried/treated and characterized using several physical examination techniques, such as FT-IR, SEM/EDX, XRD, and Raman spectroscopy in order to study their structure and morphology. Silica and lignocelluloses products were then preliminarily used in the treatment of wastewaters and water-desalination processes. |
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| Keywords: | rice husk rice straw silica lignocellulose activated carbon agriculture waste recycling |
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