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題 名 | 利用超音波震盪處理法去除焚化底渣中重金屬去除特性之研究=Study on the Characteristics of Heavy Metal Elimination in Ultrasound Sonication Pre-treatment Processes |
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作 者 | 林奇剛; 秦孝偉; 陳建豐; 尤文廷; 楊廖陞; | 書刊名 | 東南學報 |
卷 期 | 34 2009.07[民98.07] |
頁 次 | 頁163-173 |
分類號 | 445.545 |
關鍵詞 | 超音波震盪; 焚化底渣; 重金屬酸萃取; 震盪強度; Ultrasound sonication; Incinerated bottom ash; Heavy metals elimination; Acidic extraction; Sonication strength; |
語 文 | 中文(Chinese) |
中文摘要 | 摘 要 本研究係利用酸性超音波震盪法(Ultrasound Sonication Treatment,以下簡稱 「UST」)作為底渣有害物質溶出前處理程序,評估其去除效率。其中,探討內容包括 底渣顆粒大小、加酸種類、濃度、不同震盪強度及時間等最適反應條件。於研究數據 中酸液萃取、水UST 及酸液UST 處理,可發現藉由水UST 處理後能由底渣額外析出 部份重金屬Zn。特別是藉由酸液UST 震盪處理,其效果明顯增加。推論,經UST 處 理可藉由震動將能量傳輸使Pb、Cd、Zn 能有效由底渣中析出,其析出量也較「僅經 萃取酸浸泡」及「水UST 處理」的處理方法為高。就固液比1:10而言,主要以硫酸 及硝酸對三者同時析出的效果較佳。此外,當萃取酸為低濃度時,重金屬的析出量以 硫酸為居多。相對的,當萃取酸為較高濃度酸時,重金屬的析出量則以硝酸居多。因 此,Pb 析出量順序為混合酸>硫酸>硝酸>醋酸,Zn 析出量順序為硫酸=硝酸>混合酸> 醋酸,而Cd 析出量順序為硝酸>硫酸>醋酸>混合酸。經UST 反應後之底渣中重金屬 (Pb、Zn、Cd)與一般反應條件TCLP、水洗法及酸萃取法等比較後,依據各試驗結果, 推論於UST 處理效果下,操作條件於震盪時間30min、震盪強度200W、萃取酸採用1M ~5M 間的硫酸及硝酸具有較佳之析出效率,可使UST 具有顯著性的析出效率。依據 試驗結果,焚化爐底渣處理業者一般的水洗處理效果與本研究之UST 比較,可提供業 者不同的處理方法,將重金屬析出處理效率提高與操作成本降低。 |
英文摘要 | Abstract The effects of heavy metals, Pb, Cd, Zn, eliminated utilized acidic extraction together with ultrasound sonication treatment (UST) from incinerated bottom ash were studied. The principle parameters considered in this study were the liquid to solid ratio, the concentrations and varieties of acidic extraction solutions, reaction time and strength of sonication. Higher elimination efficiency could be reached for the process of acidic extraction along with UST than that of only acidic extraction or UST. The effects of liquid to solid ratio (L/S) on metals (276.2 mg-Pb/L) eliminated were discovered. At L/S = 10 the capacities for extraction of Pb, Cd, Zn were maximum at the strength of 0.5M sulfuric acid or mixed acidic solution used in acidic extraction process. It was demonstrated that the amount of extraction of Cd at the strength of 0.5M of sulfuric acid solution and mixed acidic solution were 151.5 mg/L and 170.1 mg/L, while that of Zn at the same solutions were 14.98mg/L and 3.34mg/L. The extraction rates were significantly higher at strength of 5.0M and 10.0M of the acidic solutions than at the strength of 0.5M and 1.0M. The pH of residual solution after treatment of UST was discovered to be tended to neutrality or weak base. |
本系統中英文摘要資訊取自各篇刊載內容。