EPA-100-U1U4-04-004

100

1,580 千元

2011/03/22

2011/11/30

謝子陽

永續發展室(停用)

林燕柔

中國科技大學

水質保護

支撐式液膜;萃取/萃取;離子交換樹脂

supported liquid membrane;extraction/stripping;ion exchange resin

王大銘;謝學真;劉玉玲

謝子陽

02-29313416#2502

tyhsien@cute.edu.tw

本研究為結合支撐式液膜及離子交換樹脂於多成分金屬離子廢液處理技術開發，除探討其對多成分金屬離子之處理能力，並評估回收濃縮廢液的技術，以作為替代硬碟製作程序中進料金屬溶液之可行性。多成分金屬離子分離研究中先利用鋁離子於鹼性環境中易形成沉澱析出之特性，解決使用支撐式液膜回收鋁離子程序中氫氧化鋁沉澱物會造成中空纖維膜組之膜孔阻塞問題。而在鎳、鋅雙成分離子的分離程序中，利用萃取劑D2EHPA於低酸鹼值環境中能有效地回收鋅離子的選擇性，以及在有機相中加入2 vol. %的修飾劑十二醇成功抑制第三相的生成，能有效將1000 mg/L的鋅離子完全萃取至萃取劑當中，並在180分鐘內將之濃縮至18700 mg/L。在鎳離子回收濃縮的程序中，維持控制進料溶液之酸鹼值於3.0以上，可在60分鐘內完成鎳離子萃取反應，並於180分鐘內將930 mg/L的進料鎳離子溶液濃縮至14800 mg/L。藉由此一系列三階段的分離程序，可有效將多成分金屬離子分離並進行高濃度回收；而結合具分散反萃取相支撐式液膜(高離子濃度)及離子交換樹脂程序(低離子濃度)處理鎳離子溶液結果顯示，確實能有效減少處理時間，降低廢液處理成本。

支撐式液膜;萃取/萃取;離子交換樹脂

100年環保署詳細版及報告大綱.pdf

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2012/2/1 上午 12:00:00

The purpose of this study was to integrate supported liquid membranes and ion exchange resin processes and then applied on the treatment of multi-component metal ions from waste streams of the hard disk manufacture industry. In this work, aluminum ions were easily precipitated and separated from nickel and zinc ions solutions through a precipitation process by adding a 1M sodium carbonate solution to multi-component metal ion solutions. At the same time, the precipitation process can keep the aluminum hydroxide precipitation from the blockage of the pores of hollow fiber module along the operation of the supported liquid membrane process. D2EHPA, Isopar-L, 1-dodecanol and aqueous zinc-nickel sulfate solutions were used to be the extractant, diluent, modifier and feed solution respectively in order to evaluate the separation efficiency of the support liquid membranes process at an initial low pH value of 2.5. Results indicated that the zinc ions can be completely removed from the aqueous complex zinc-nickel sulfate solutions and concentrated from initial concentration of 1000 mg Zn2+/L to 18700 mg Zn2+/L through the extraction process and stripping process respectively after 180 minutes operation. Additionally, nickel ion can be completely extracted by the supported liquid membranes after 60minutes operation at pH 3.0. Recovered concentrated nickel ions at a concentration of 14800 mg Ni2+/L can be accomplished through the stripping process of the supported liquid membranes after 180 minutes operation. Through successive three-stage treatment processes, multi-component metal ions from waste streams can be successfully separated and removed by the extraction process and then regenerated and concentrated by the stripping process. Results for the treatment of nickel ions by the combination of the supported liqid membranes at high initial nickel ions concentrations as well as ion exchange resins processes at low initial nickel ions concentrations respectively showed the time of treatment processes can be effectively reduced.

supported liquid membrane;extraction/stripping;ion exchange resin