以強酸型陽離子交換樹脂吸附錳(Ⅱ)和鈷(Ⅱ)離子之研究

A Study on the Adsorption of Manganese(Ⅱ) and Cobalt(Ⅱ) Ions with using Strong Acidic Cation Exchange Resin

吳承恩(Chen-En Wu)

指導教授 ： 蔡德華

國立臺北科技大學/工程學院/化學工程研究所/碩士(2009年)

摘要

本研究利用C-160強酸型陽離子交換樹脂作為固體吸附劑，來吸附交換水溶液中的重金屬錳(Ⅱ)和鈷(Ⅱ)。藉由改變金屬濃度、初始pH值、錳鈷金屬比例、樹脂克數、反應溫度等條件變化，探討靜態吸附平衡之關係。
實驗結果顯示：C-160樹脂對金屬的吸附平衡時間大致在120分鐘後，吸附反應快速，約在44 mM以上的金屬濃度，會使樹脂吸附達飽和，且對錳(Ⅱ)的飽和吸附量為1.543 mmol/g，對鈷(Ⅱ)為1.515 mmol/g，而在錳鈷金屬共存的雙成分溶液系統下，發現樹脂對錳(Ⅱ)的選擇性比鈷(Ⅱ)來的高；隨著初始pH值下降，平衡吸附量是會跟著降低的，而隨著反應溫度的增加，平衡吸附量是隨之增加的，還有樹脂克數的增加，平衡吸附量也是跟著下降的；在雙成分溶液系統下，固定鈷(錳)金屬比例為1時，隨著錳(鈷)金屬比例的增加，樹脂對錳(鈷)金屬的平衡吸附量也會跟著增加，對鈷(錳)金屬則是減少的。

關鍵字

離子交換 ； 錳離子 ； 鈷離子 ； 強酸型陽離子交換樹脂

並列摘要

In this study, the strong acidic cation exchange resin C-160 was used as the solid absorbent to adsorb and exchange the heavy metal manganese(Ⅱ) and cobalt(Ⅱ) in the aqueous solution. To probe into the characteristic of the static adsorption process, we examined the effects of changing metal concentration, initial pH value, the metal proportion of manganese(Ⅱ) and cobalt(Ⅱ), the resin grams and the work temperature.
The results of experiments show that: the adsorption of C-160 resin to metal is fast and the time of reaching adsorbed balance is longer than 120 minutes. The saturated adsorbing quantity of the resin for the metal concentration is above 44 mM. The saturation absorbed amount for manganese(Ⅱ) and cobalt(Ⅱ) are 1.543 mmol/g and 1.515 mmol/g.
In the binary composition solution system of manganese(Ⅱ) and cobalt(Ⅱ), the selectivity of resin for manganese(Ⅱ) is higher than that of cobalt(Ⅱ). As initial pH value was decreased, the adsorbed balance amount reduced. As for the working temperature, the adsorbed balance amount increased with temperature. The resin grams followed the opposite trend.
For the binary composition solution system, fixing the metal proportion of cobalt(manganese) at 1, it was observed that with the metal proportion of manganese(cobalt) increased, the adsorbed balance amount of the resin for manganese(cobalt) increased but that of for cobalt(manganese) decreased.

並列關鍵字

Ion exchange ； Manganese ion ； Cobalt ion ； cation exchange resin

參考文獻

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