本研究係以批次試驗探討零價金屬及雙金屬組合對水中五氯酚(PCP)之去氯還原處理之效果及動力學研究。結果顯示，添加Fe0顆粒於含PCP水溶液中，其pH值隨著時間的增加而增加，直到pH值達9.0左右而趨於穩定。添加Zn0顆粒或Zn0(顆粒)/Pd0(粉末)於含PCP水溶液中，其pH值則隨著時間的增加而緩慢增加，且增加幅度很小，pH值僅達7.0左右。氯酚類化合物與Fe0及Zn0顆粒之反應時，氯酚類化合物吸附在Fe0顆粒及Zn0顆粒的含量以反應初期最高，隨後逐漸降低。Fe0顆粒對水溶液中PCP似乎沒有去氯還原的效 The aim of this study is to explore the dechlorination effects and kinetics on pentachlorophenol (PCP) by using zero valent metals (ZVM) and bimetallics via batch tests. Results indicate that the pH of the solution with PCP and Fe0 (granular) increased with increase of time until the pH had steadied at around 9.0 whereas the pH of the solution with PCP and Zn0 (granular) or PCP with Zn0 (granular)/Pd0 (powder) increased slowly with time and finally steadied at around 7.0. After reacting with Fe0, Zn0 or Zn0/Pd0, it can be found that there was about 30% of initial absorption of hlorophenols onto the surface of Fe0 or Zn0 and then gradually decreased with time. Zn0 and Zn0/Pd0 showed a higher reductive dechlorination effect on chlorophenols in solution than Fe0 did. On the basis of kinetics, a pathway of sequential reductive dechlorination could be found in the system of Zn0 or Zn0/Pd0 in reaction with PCP. The rate constant of PCP loss in the system of Zn0/Pd0 with PCP was 60% higher than that of Zn0 with PCP, which reveals that maybe the catalysis of Pd0 could enhance the loss of PCP. PCP absorbed onto the surface of Fe0 was more dechlorinated than that in solution after a long reaction time. Zn0 also had a higher dechlorination effect on the absorbed PCP than that in solution.
