RECOVERY OF COPPER FROM WASTEWATER BY FLUIDIZED-BED HOMOGENEOUS GRANULATION PROCESS

• Main Authors: Karnsinee Lertratwattana, 陳姿妙(Karnsinee Lertratwattana)
• Other Authors: Lu, Ming-Chun
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/4fy492

碩士 === 嘉南藥理大學 === 環境資源管理系 === 105 === With the rapid advancement of industry, copper has become one of the most extensively used heavy metals and considered as one of the major pollutant that also affects human health. This study focused on the removal of copper from a synthetic wastewater by fluidized bed homogeneous granulation process (FBHG) and evaluated the effects of relevant parameters, including operating pH, molar ratio of carbonate (CO32-) to copper (Cu2+), influent flow rates of copper and carbonate, and initial copper concentration. The highest copper removal of 99.55% was obtained at two-step operating pH set at 6.5 and 8.0, with initial copper concentration of 6.30 mM, molar ratio of CO32-/Cu2+ of 1.5, and individual influent flow rate of 10 mlmin-1 (CO32- or Cu2+). Moreover, the two-step operating pH led to produce larger granules with a size of approximately 0.3 mm. The granules have been characterized as carbonate hydroxide (Cu2CO3(OH)2) by the SEM and XRD data. The final residual copper concentration in the effluent (0.9 mg/L) is within the limits set by the EPA (1.3 mg/L). The present study demonstrated that copper has been successfully removed and recovered as CuCO3(OH)2 granules in a fluidized-bed reactor.