Enhanced recovery of aluminum from wastewater using a fluidized bed homogeneously dispersed granular reactor

doi:10.1016/j.chemosphere.2019.02.086

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Resources Management > Periodical Articles > Item 310902800/32584

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/32584

Title:	Enhanced recovery of aluminum from wastewater using a fluidized bed homogeneously dispersed granular reactor
Authors:	Vilando, Anabella C. Caparanga, Alvin R. Ming-Chun Lu(盧明俊)
Contributors:	Mapua Univ, Sch Chem Biol & Mat Engn & Sci Mapua Univ, Sch Grad Studies Adamson Univ, Coll Engn, Dept Chem Engn Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
Keywords:	Fluidized-bed Granules Cross-section loading Upflow velocity Optimization Box-Behnken design
Date:	2019-05
Issue Date:	2020-07-29 13:50:53 (UTC+8)
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Abstract:	The recovery of aluminum from wastewater is one of the main environmental issues that need to be addressed in the aluminum finishing industry. A new technique of converting a soft slurry into hard granules using the homogeneous granulation process in the fluidized-bed reactor (FBR) can respond to this problem. It is a better method of remediation than producing a slurry containing 70% water. This study deals with the recovery of aluminum from aqueous solutions using Fluidized-bed homogeneous granulation process (FBHGP) without seeds. The hydraulic operating conditions were optimized using Box-Behnken Design (BBD) to attain the optimum aluminum removal (AR%) and granulation ratio (GR%). Optimum values of AR% = 98.8% and GR%= 96.9% were attained at the following conditions: influent aluminum concentration, 334.1 mg L-1; precipitant pH, 10.4; molar ratio (MR) of precipitant to metal [OH-](in)/[Al3+](in), 2.5. The characteristics of the granules were comparable with those of orthorhombic structure of aluminum oxide (Al2.66O4). FBHGP was proven to be effective as dictated by the reaction mechanism in the recovery of aluminum from aluminum-rich aqueous solutions. (C) 2019 Elsevier Ltd. All rights reserved.
Relation:	Chemosphere, v.223, pp.330-341
Appears in Collections:	[Dept. of Environmental Resources Management] Periodical Articles

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