以流體化床均質造粒使用碳酸鹽沉澱劑回收鈷(II)與銅(II)

Chia Nan University of Pharmacy & Science Institutional Repository > 環境永續暨休閒學院 > 環境資源管理系(所) > 博碩士論文 > Item 310902800/33046

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標題:	以流體化床均質造粒使用碳酸鹽沉澱劑回收鈷(II)與銅(II) COBALT(II) AND COPPER(II) RECOVERY BY FLUIDIZED-BED HOMOGENEOUS GRANULATION PROCESS USING CARBONATE PRECIPITATION AGENT
作者:	Thanachot Udomphan
貢獻者:	環境資源管理系盧明俊
關鍵字:	金屬回收成核優化沉澱過飽和 Metal Recovery Nucleation Optimization、Precipitation Supersaturation
日期:	2019
上傳時間:	2020-12-09 14:45:19 (UTC+8)
摘要:	該研究通過在室溫條件下以連續模式操作的流體化床反應器中使用均相造粒工藝研究了從合成廢水中回收鈷和銅的可行性。使用碳酸鈉作為沉澱劑。研究的變量包括pH，碳酸鹽與金屬的摩爾比，金屬濃度和氯化物濃度。 7mM鈷廢水的最高造粒和去除效率在pH8.5時為94.03％，在pH9.0時為98.97％。對於7mM銅廢水，最高的造粒和去除效率在pH7.0時為95.29％，在pH7.0至8.5時分別為99％以上。對於所有情況，最佳碳酸鹽與金屬的摩爾比為2。大多數鈷和銅顆粒的直徑小於0.1毫米。對於混合的10.5 mM鈷和10.5 mM銅合成廢水，最佳條件為pH 8.50，碳酸鹽與總金屬摩爾比為2，使鈷的最大造粒和去除效率分別為96.03％和97.84％，97.77％和99.78銅的百分比分別為。大約95％的顆粒直徑小於0.1毫米。在氯化物存在下，金屬的造粒和去除效率以及顆粒尺寸顯著降低。 This research investigated the feasibility of recovery cobalt and copper from synthetic wastewater by using the homogeneous granulation process in a fluidized-bed reactor operated in a continuous mode under room conditions. Sodium carbonate was used as the precipitant. The studied variables included pH, molar ratio of carbonate to metal, metal concentration, and chloride concentration. The highest granulation and removal efficiencies of 7 mM cobalt wastewater were 94.03% at pH 8.5 and 98.97% at pH 9.0, respectively. For 7 mM copper wastewater, the highest granulation and removal efficiencies were 95.29% at pH 7.0 and greater than 99% at pH 7.0 to 8.5, respectively. Optimum carbonate to metal molar ratio was 2 for all cases. Most cobalt and copper granules had the sizes less than 0.1 mm in diameter. For mixed 10.5 mM cobalt and 10.5 mM copper synthetic wastewater, the optimum conditions were at pH 8.50 and the carbonate to total metal molar ratio of 2 which yielded the maximum granulation and removal efficiencies of 96.03% and 97.84% for cobalt and 97.77% and 99.78% for copper, respectively. Approximately 95% of the granules had the diameters less than 0.1 mm. In the presence of chloride, the granulation and removal efficiencies of metals as well as the granule size decreased significantly.
關聯:	電子全文校內公開日期：2019-07-31;校外：2021-07-31 學年度：107， 108頁
顯示於類別:	[環境資源管理系(所)] 博碩士論文

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