台灣地區電鍍業發展至今數十年，電鍍產業的發展同時也產生大量的電鍍廢液，廢液之中的重金屬對環境造成嚴重的污染，本研究的主題即是如何以低成本兼具有效的方法去減少重金屬汙染。
本研究是利用高溫合成法將彰化第三淨水場之污泥轉製成鐵錳氧化磁體（KMnFe2O4），以此作為吸附劑進行重金屬的吸附可行性研究，實驗中以鐵錳氧化磁體（KMnFe2O4）為吸附劑以水中重金屬（Ni2+、Cr3+）為例，藉由改變不同影響因子，如：金屬溶液濃度、吸附時間之影響，進而觀察其吸附效果。
實驗中鐵錳氧化磁體（KMnFe2O4）添加量為0.1、0.3、1.5(g)，鎳、鉻離子的濃度範圍在10-200mg/L。實驗結果顯示，磁性顆粒添加量越多其去除效率越佳，而對於鎳、鉻離子皆有效吸附。套用Langmuir吸附模式，結果顯示R2值均可達0.9以上；而在Freundich 吸附模式中，吸附劑之n值均大於1，顯示出鐵錳氧化磁體之吸附重金屬的可行性。 The electroplating industry in Taiwan has been developing for decades. The development of the electroplating industry has also produced a large amount of electroplating waste liquid. The heavy metals in the wastewater cause serious pollution to the environment. In this study，effective and low cost treatment method to reduce heavy metal pollution was evaluated.
In this study, the high-temperature synthesis method was used to convert the sludge from Changhua No. 3 Purified Water Field into iron-manganese oxidized magnet (KMnFe2O4), which was used as an adsorbent for the feasibility study of heavy metal adsorption. The experiment iron-manganese oxide magnet (KMnFe2O4) was used to adsorb the heavy metal (Ni2+, Cr3+), and the adsorption effect is observed by changing the different influence factors such as the concentration of the metal solution and the adsorption time.
In the experiment, the iron manganese oxide magnet (KMnFe2O4) were added in an amount of 0.1, 0.3, 1.5 (g), and the concentration of nickel and chromium ions was in the range of 10 to 200 mg/L. The experimental results showed that the more the amount of magnetic particles added, the better the removal efficiency. Applying the Langmuir adsorption model, the results show that the R2 value can reach more than 0.9; while in the Freundich adsorption model, the n value of the adsorbent is greater than 1. The results showed that the high feasibility of adsorbing heavy metals with the iron manganese oxide magnet (KMnFe2O4).
