title: Remediation of distilleries wastewater using chitosan immobilized Bentonite and Bentonite based organoclays.
abstract: Organic-inorganic nanocomposite, namely chitosan immobilized Bentonite (CIB) with chitosan content of 5% was synthesized in an acetic acid solution (2%). Organically modified CIB and Bentonite (mbent.) were prepared by intercalating cetyl trimethylammonium bromide (CTAB) as a cationic surfactant at doses equivalent to 1.5 and 3 times the cation exchange capacity (CEC) of clay. The prepared samples were characterized using FTIR, XRD and SEM to explore the interlayer structure and morphology of the resultant nanocomposites. The remediation of distilleries (vinasse) wastewater process was carried out using different adsorbents including CIB, modified CIB (mCIB), Bentonite (bent.), modified Bentonite (mbent.) and chitosan at different contact time. The results showed that the packing density of surfactant used in the synthesis of organoclays strongly affects the sorption capacity of the clay mineral and also showed that (mCIB)3 was found to be the most effective sorbent in the purification of distilleries wastewater with 83% chemical oxygen demand (COD) reduction and 78% color removal.
authors: Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
authors: F I
authors: FI
authors: El-Dib
authors: Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
authors: F M
authors: FM
authors: Tawfik
authors: Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
authors: Gh
authors: G
authors: Eshaq
authors: Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt.
authors: H H H
authors: HH
authors: Hefni
authors: Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt. Electronic address: ahmed_ezzatt@msn.com.
authors: A E
authors: AE
authors: ElMetwally
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D001546:Bentonite / Q000737:chemistry*; D057919:Biological Oxygen Demand Analysis; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D000077215:Clay; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000538:Aluminum Silicates; D001546:Bentonite; D000077286:Cetrimonium; D002593:Cetrimonium Compounds; D048271:Chitosan; D000077215:Clay; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorption; Bentonite; Catalysis; Chitosan; Wastewater treatment