以H2O2進行離子交換樹脂氧化反應

Oxidation of Ion-Exchange Resin Using H2O2

吳騰輝

指導教授 ： 吳和生

元智大學/工程學院/化學工程與材料科學學系/碩士(2001年)

摘要

中文摘要
離子交換樹脂廣泛應用於工業水的處理，所產生的廢離子交換樹脂若吸附了放射性物質或有毒害的有機物，若不經過適當的處理而直接丟棄，在環境中勢必造成嚴重的環境污染，本實驗即是以濕式氧化法針對離子交換樹脂進行氧化裂解加以研究。
本實驗分別取陰陽離子交換樹脂NRW-400和NRW-100進行實驗，以硫酸亞鐵和硫酸銅為催化劑在100℃時，以半批次進料過氧化氫，以總有機碳分析儀分析液相的總有機碳，以GC的FID偵測器分析液相產物及以TCD偵測器做氣相產物的定量，分別討論裂解陰陽離子交換樹脂催化劑的選擇、催化劑的用量、陰離子樹脂發泡問題的克服、過氧化氫的流速、溫度的影響及反應完後廢液的混凝處理。
由實驗結果得知，陽離子交換樹脂以混合硫酸亞鐵和硫酸銅的催化劑有較佳的催化效果，其液相有機碳裂解百分比在經過80分鐘反應幾乎可達100%，催化劑的用量越高有越佳的催化效果，過氧化氫的流速以流速越快越好，但卻增加成本。溫度則以沸騰溫度100℃較低溫反應為快。陰離子樹脂在消泡問題上的克服，則採用有機酸及醋酸參與反應可有效的抑制發泡問題，並可有效裂解離子交換樹脂，在催化劑的選擇上則以硫酸銅和硫酸銅混合硫酸亞鐵有較佳的裂解反應，催化劑的用量則考慮到陰離子的發泡問題故相對於陽離子樹脂所用的催化劑低相當多，而其反應也是以高濃度催化劑有較佳的裂解反應，陰離子樹脂雖引入醋酸，但是增加其反應時間到兩小時其有機碳裂解百分比也可達到99%以上。
關鍵詞：離子交換樹脂；過氧化氫；催化劑；濕式氧化法

關鍵字

離子交換樹脂 ； 過氧化氫 ； 催化劑 ； 濕式氧化法

並列摘要

Abstract
Ion-exchange resin is extensively used in treatment of industrial water, some resins which can not reuse form the waste ion-exchange resin. Then, if the radioactive or the poisonous organic compounds were absorbed in the resin, the deposition of the resin is important pollution of environments without using a proper waste-treating method. This study aims to study a wet-oxidation method to degrade the ion-exchange resin and to understand the decomposition phenomenon of the resin.
Two kinds of the resin, anion ion-exchange resins (NRW-400) and cation ion-exchange resins (NRW-100) were investigated in this study. We will employ iron(II) sulfate and copper(II) sulfate as catalysts that the operating condition are temperature was 100℃, and adding hydrogen peroxide by semi-batch method. The amount of total organic carbon(TOC) was determined by TOC analysis. The concentration in liquid and gas phases were analyzed by GC with FID and TCD detectors. Then, the operating conditions were discussed the selection of anion ion-exchange resin or cation ion-exchange resin, amount of catalysts, the bubbly problem of anion resin, flow rate of hydrogen peroxide, effect of temperature and disposing of the waste water after reaction to achieve the optimum conditions.
According experimental results, the degradation of the cation ion-exchange resin with mixture of iron(II) sulfate and copper(II) sulfate is almost up to 100 percent after the reaction of 80min. The degrading rate of the resin was increased with increasing amount of catalyst, flow rate of hydrogen peroxide, or temperature. If the organic acid (i.e. CH3COOH) was extra adding into the reaction the bubbly problem of anion ion-exchange resin was reduced. Due to the bubbly problem of anion resin the amount of catalyst for anion resin was lower lower than that of cation resin. When the acetic acid was extra adding to degrade the anion resin, the degrading percentage of total organic carbon in the liquid phase was up to 99% after the reaction time of 2 hrs.

並列關鍵字

HASH(0xe88b804)

參考文獻

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