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Student Number 963306004
Author KUN MING(林坤明)
Author's Email Address No Public.
Statistics This thesis had been viewed 1841 times. Download 3594 times.
Department Executive Master of Environmental Engineering
Year 2008
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Effects of aminoethanolamine on removal copper ion in wastewater from printed circuit board plants
Date of Defense 2009-07-04
Page Count 113
Keyword
  • Aminoethanolamine
  • Chelating agent
  • Copper
  • Heavy metal removal
  • Printed Circuit Board
  • Abstract For Printed Circuit Board (PCB) plants, chelating agent is frequently added into the system to maintain the Cu2+ concentration during manufacturing product process. However, the added chelating agent might suppress the Cu2+ to form settlement of Cu(OH)2. The result leads to Cu2+ concentration in effluent exceeding the limitation for environmental regulations. In this study, we used the various chemical reagents and coagulants to examine the efficiency of removal Cu2+ as chelating agent (Aminoethanolamine, AEEA) with the different concentrations are present in the wastewater. Also, the best operation parameters were experimentally determined.
    The target samples were obtained from wastewaters in a PCB plant and the man-made wastewater. The chemical reagents used are sodium sulfide (Na2S), sodium hydroxide (NaOH) and commercial heavy metal precipitant. The used coagulants include ferrous chloride (FeCl2) and ferrous sulfate (FeSO4). The results of chemical precipitation experiment and Jar test determine the best dose and pH for removal Cu2+ in the wastewater containing AEEA.
    The experimental results indicate FeCl2 and FeSO4 are used as coagulants that Fe2+ can exchange Cu2+ from AEEA in pH 2~6 solutions. The appropriate dose Fe2+ added can effectively remove Fe2+ to reach to environmental regulations in effluents. For high AEEA concentration wastewater, FeSO4 has the higher efficiency of Cu2+ removal than FeCl2 does. Regardless of pH consideration, Na2S is the best chemical agent for Cu2+ removal. The1:1 mole ratio of S2- relative to Cu2+ can reduce Cu2+ concentration below 3.0 mg/L. The best operation condition is considered that enough Fe2+ and S2- are added to the wastewater when a large of AEEA discharges into the wastewater treatment plant.
    Table of Content 第一章研究緣起與目的1
    1-1 研究緣起1
    1-2 研究目的2
    第二章 文獻回顧3
    2-1 我國印刷電路板產業特性與污染來源3
    2-1-1 印刷電路板產業發展及製程介紹4
    2-1-2 印刷電路板廠污染特性分類7
    2-1-3 印刷電路板廠廢液與廢水污染來源介紹9
    2-1-4 一般印刷電路板廢水處理流程說明13
    2-2 含AEEA製程之介紹18
    2-2-1 Black Hole 相關製程18
    2-2-2 AEEA之化學特性22
    2-2-3 AEEA 污染特性分析23
    2-2-4 AEEA在產業上的應用24
    2-3 重金屬在廢水中處理程序介紹24
    2-3-1 重金屬氫氧化物沉澱法24
    2-3-2 含螯合劑廢水之處理28
    2-4 螯合劑對重金屬去除之影響34
    2-4-1 印刷電路板廠常用螯合劑34
    2-4-2 各種螯合劑官能基對銅離子螯合之影響36
    2-4-3 含螯合劑水溶液於各種pH值時對重金屬去除之影響38
    2-4-4 各種混凝劑對銅離子去除效率影響38
    第三章 研究與實驗方法42
    3-1 研究流程42
    3-2 實驗藥品44
    3-3 實驗設備45
    3-4 實驗設計與步驟46
    3-4-1 簡易式分光光度計檢測廢水銅含量之可行性試驗46
    3-4-2 水中AEEA含量對銅離子去除之影響47
    3-4-3 AEEA廢水於不同pH值混凝劑對銅離子去除之影響49
    3-4-4 不同混凝劑量對含AEEA廢水銅離子去除之影響49
    3-4-5 含AEEA廢水中銅離子濃度對銅離子去除效率之影響49
    3-4-6 AEEA廢水中其他離子濃度對銅離子去除效率之影響50
    3-4-7 反應時間對銅離子去除效率之影響50
    3-4-8 鋁板添加量對AEEA廢液銅離子還原速率之影響50
    3-4-9 硫化鈉及重捕劑添加量對銅離子去除效率之影響51
    3-5 分析項目及方法51
    第四章 結果與討論53
    4-1 簡易式分光光度計與AA檢驗結果探討53
    4-2 實廠廢水基本特性分析58
    4-2-1 進流廢水水質變化分析59
    4-2-2 放流水水質變化分析61
    4-3 混入AEEA對廢水銅離子去除效率之影響63
    4-3-1 添加AEEA後處理水銅離子含量分析63
    4-3-2 不同pH值對銅離子之去除效率影響65
    4-3-3 催化還原處理67
    4-3-4 混凝劑對含AEEA廢水中銅去除率之影響69
    4-3-5 理論值與實際值比較80
    4-4 硫離子對AEEA溶液中銅去除率之影響81
    4-4-1 硫化鈉對AEEA溶液中銅去除率之影響81
    4-4-2 重金屬捕集劑對AEEA溶液中銅去除率之影響86
    4-4-3 銅離子高於理論值之原因探討88
    4-5 實廠廢水之最佳操作條件分析89
    4-5-1 實廠操作可能之突發狀況89
    4-5-2 最佳操作條件分析89
    4-5-3 加藥成本分析92
    第五章 結論與建議98
    5-1 結論98
    5-2 建議99
    參考文獻101
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    Advisor
  • Jiunn-Fwu Lee(李俊福)
  • Files
  • 963306004.pdf
  • approve immediately
    Date of Submission 2009-07-10

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