鉛蓄電池工廠污泥熱處理之鉛物種鑑定

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Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/4687

Title:	鉛蓄電池工廠污泥熱處理之鉛物種鑑定
Other Titles:	Lead Speciation in Thermally Treated Sludge from a Lead-acid Battery Factory
Authors:	李健源 Lee, chien-yuan
Contributors:	魏玉麟 Wei, Yu-Ling 東海大學環境科學與工程學系
Keywords:	含鉛污泥;事業廢棄物溶出程序;熱處理 SEM;XAS;XRPD;TCLP;thermal treatment
Date:	2003
Issue Date:	2011-05-19T06:33:17Z (UTC)
Abstract:	本研究鉛蓄電池工廠之原生污泥與污泥混合樣品，於不同溫度下（300˚C、500˚C、700˚C、900˚C及1100˚C）進行熱處理，處理時間為2小時後，再以事業廢棄物溶出程序（Toxicity Characteristic Leaching Procedure, TCLP）測定其溶出值、以掃描式電子顯微鏡（Scanning Electron Microscope, SEM）測定其表面型態、以X光粉末繞射（X-Ray Powder Diffraction, XRD）測定結晶之化合物、最後以X光吸收光譜（X-Ray Absorption Spectroscopy, XAS）研究鉛於熱處理時之物種變化及其周圍鍵結結構。原生污泥部分：發現經熱處理後，其TCLP溶出值隨熱處理溫度上升而有下降之趨勢。但是在700˚C時，卻反而大幅升高，因可能是因為熱處理後原生污泥基質收縮且顆粒聚集，使其表面積增加，導致TCLP溶出值異常升高。而XAS結果顯示，熱處理前後污泥所含鉛之物種皆是以PbSO4為主，顯示熱處理並無法有效地分解原生污泥所含之PbSO4，。而在污泥混合黏土或高嶺土部分：樣品經熱處理後，其TCLP溶出值隨熱處理溫度上升而有下降之趨勢，但是其溶出值卻有部分高於原生污泥，顯示將原生污泥混合黏土或高嶺土將會提昇其鉛之溶出率，顯示混合樣品及其熱處理為處理此一污泥為不可行之方法，需再以更新方式處理。 This study was about Pb-containing sludge from a Lead-acid battery factory. We mixed it with clay or kaolin. Then, we treated thermally sludge and its mixtures at 300˚C, 500˚C, 700˚C, 900˚C, and 1100˚C. And study by TCLP (Toxicity Characteristic Leaching Procedure), SEM (Scanning Electron Microscope), XRD (X-Ray Powder Diffraction), and XAS (X-Ray Absorption Spectroscopy). The results were that after thermal treatment, leaching amount of TCLP from sludge decreased with temperature increasing. But leaching amount increased substantially at 700˚C. It could be that the surface at 700˚C was shrunk by SEM. The result of XAS was that the major species is PbSO4. And we also found that CN decreased with temperature (300─700) increasing. It could be that PbO in this sludge changed to α-PbO and β-PbO.
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