隨著產業的快速發展，銅已經成為應用最為廣泛的重金屬之一，亦被認為是影響人類健康的主要污染物之一。本研究主要是以流體化床造粒技術(FBHG)去除合成廢水中之銅離子，並評估相關參數之影響，包括操作時之pH、碳酸與銅之莫爾比、碳酸與銅之進流速度及銅之初始濃度。本研究分別將操作之pH設定為6.5及8.0，當銅之初始濃度為6.30mM、碳酸鹽及銅離子之莫耳比為1.5、進流流速為10 mlmin-1 (CO32- or Cu2+)時，銅之去除率將達到最高99.55%。此外採用兩階段反應pH可以產生約0.3mm之較大顆粒。由SEM及XRD之數據顯示所獲得的結晶顆粒為鹼式碳酸銅。實驗結果顯示合成廢水中最後殘留之銅濃度(0.9mg/L)，符合放流水標準(1.3mg/L)。本研究顯示以流體化床均質化顆粒程序可以成功地將銅離子從廢水中轉化成碳酸銅顆粒去除並回收。 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.
