鋁及鐵鹽混凝去除有機物之機制

The Mechanism of Removal of Organic Matter by Coagulation of Iron and Aluminum Salts

賴文亮(Wen-Liang Lai) ； 葉宣顯(Hsuan-Hsien Yeh)

《界面科學會誌》 28卷2期 (2006/06) Pp. 111-117

https://doi.org/10.30020/JCCIS.200606.0004

摘要

本研究取澄清湖原水，並以明礬及氯化鐵兩種混凝劑進行瓶杯試驗，經快混、慢混及靜置後，取上澄液分析非氣提性溶解性有機物（non-purgeable dissolved organic carbon）及濁度之濃度，再計算其去除率，並藉由兩種混凝劑之水化平衡方程式，分析兩參數在不同pH及混凝劑量被去除之機制。結果顯示，鐵鹽對溶解性有機物之去除效果，較鋁鹽為佳，至於兩種混凝劑對濁度去除能力明顯優於溶解性有機物；兩種混凝劑在沉降區，較高金屬離子濃度及低pH值（鋁鹽為5-6，鐵鹽為4-7）之範圍對溶解性有機物之去除明顯較更高pH為佳，另低pH值時，兩種金屬混凝劑對濁度之去除效果明顯受水中溶解性有機物被去除量所影響。

關鍵字

瓶杯試驗 ； 非氣提性溶解性有機物

並列摘要

In this research, pH-log[M] diagrams of coagulant, including alum and ferric chloride, were selected to elucidate the mechanisms of the removal for non-purgeable dissolved organic carbon (NPDOC) and turbidity in coagulation process that simulated by jar test. Based on those results conducted, it showed that NPDOC removal by iron salt was superior to that by aluminum salt. Turbidity removal by both metal salts was higher than that of NPDOC. In the settling zone, the removal of organic matter in low pH was superior to that in the high pH. Regarding the settling zone with low pH value, it revealed that turbidity removals by both metal salts were apparently interfered by the amount of NPDOC removal in coagulation process.

並列關鍵字

Jar test ； Non-purgeable Dissolved organic carbon