利用低成本纖維做為吸附劑以去除廢水中的重金屬

在螯合劑被廣泛應用的現今中，環境汙染與整治越來越重要，自從台灣社會發生數起重金屬危害事件後，人民與政府更加重視重金屬汙染與防治等相關事宜。且隨著科技逐漸發達，各式各樣的廢水處理法也臻於完善，但仍有其限制及缺陷，而本實驗便希望以一新穎的高分子類型吸附材料為基礎進行含銅、鈷乙二胺錯合物廢水的處理。　　透過標準品模擬測試吸附劑之吸附效果，並以火焰式原子吸收光譜儀進行檢測，以探討纖維吸附劑之基礎吸附效能以及最佳反應條件。由實驗結果得知纖維吸附劑對於銅、鈷離子混合溶液以及銅、鈷錯合物混合溶液的吸附效率，結果為銅離子：103 mg/g、鈷離子：17 mg/g；銅錯合物：18 mg/g、鈷錯合物：95 mg/g。　　以最佳化吸附條件：水體溫度25℃、酸鹼值11、反應時間60分鐘下進行真實廢水的吸附實驗，對於體積75 mL，銅濃度70 mg/L、鈷濃度170 mg/L之電鍍廢水，吸附劑使用量達到0.65 g時，可將廢水中鈷汙染物含量減少至1 ppm以下，且銅汙染物含量也可下降至5~6 ppm，透過本研究實驗結果，證實此纖維吸附劑可處理乙二胺螯合態的重金屬廢水。

關鍵字

銅；鈷；乙二胺；螯合物；纖維吸附劑；廢水

並列摘要

Chelating agents nowadays have more application in electroplating, mining and leather industries. Environmental pollution and remediation are becoming more and more important. Since the occurrence of several heavy metal contamination in Taiwanese society, people and the government have paid more attention to heavy metal pollution and have made laws to prevent unscrupulous pollution. 　　With the development of science and technology, various kinds of wastewater treatment process are also perfected. In this experiment, we use a novel polymer-based adsorbent for wastewater which containing copper and cobalt in chelated form with ethylenediamine. 　　The adsorption efficiency of the adsorbent was tested by using standard solution for simulation and using flame atomic absorption spectrometer for detection to investigate the basic adsorption efficiency and optimal reaction conditions of the fiber adsorbent. 　　The experimental results show that the adsorption efficiency of the fiber adsorbent for copper ion, cobalt ion mix solution, and copper complex, cobalt complex mix solution are listed below: 　　copper ion:103 mg/g ; cobalt ion:17 mg/g, 　　copper complex:18 mg/g ; cobalt complex:95 mg/g. 　　The optimal adsorption conditions: water temperature 25℃, pH 11 and reaction time 60 minutes to carry out the adsorption experiment of real electroplating wastewater. When the volume of wastewater 75 mL, copper concentration 70 mg / L, cobalt concentration 170 mg / L, and the amount of adsorbent we used reaches 0.65 g, the cobalt concentration in the wastewater can be reduced to less than 1 ppm, and the copper concentration can also be reduced to 5-6 ppm.

並列關鍵字

Copper ； Cobalt ； Ethylenediamine ； Chelate ； Fiber Adsorbent ； Wastewater

參考文獻

Jaya Mary Jacob, Chinnannan Karthik, Rijuta Ganesh Saratale, Smita .Kumar, Desika Prabakar, K.Kadirvelu, Arivalagan Pugazhendhi, Biological approaches to tackle heavy metal pollution: A survey of literature, Journal of Environmental Management. 217, 56-70.

Google Scholar

Prabhat Kumar Rai , Sang Soo Lee , Ming Zhang , Yiu Fai Tsang , Ki-Hyun Kim, Heavy metals in food crops: Health risks, fate, mechanisms, and management, Environment International 125 (2019) 365–385