| 摘要: | 本研究利用燒結處理技術，將淨水污泥吸附含砷溶液(300ppb)，製作成含砷污泥，並燒結製成磚材。而後評估燒結試體材料化或掩埋化之可行性，研究過程分別控制燒結溫度為400°C、600°C、800°C、900°C、1000°C與1100°C 。研究結果顯示，燒結溫度低於900℃試驗條件下，由於顆粒尚未達到黏合及頸部成長現象，燒結試體結構鬆散，燒級試體之材料特性分析結果尚未符合中國國家標準(CNS)規範。當燒結溫度達900℃以上時，燒結試體體積收縮率明顯增大，吸水率降低，試體緻密化程度、密度及抗壓強度等皆呈明顯上升之現象，同時燒結試體抗壓強度及吸水率均符合CNS之一般建築用磚之規範，且抗壓強度亦能符合二級磚之規範。 而燒結試體之毒性特性溶出試驗(TCLP)分析結果顯示 ，當溫度上升As溶出量雖略有所上升由0.004ug/L至0.47ug/L ，但溶出濃度皆低於TCLP 法規管制標準5mg/L以下，符合材料之環境安全性要求。根據 X 光粉末繞射分析(XRD)結果顯示出當溫度提升至400℃時所產生的結晶相，在溫度提升至800℃時部分的結晶相受到破壞，而在溫度提升至1000℃時結晶相受到破壞更加明顯，故研判溫度提升會破壞燒結試體的結晶相導致試體TCLP溶出量增加。關鍵字：燒結、淨水污泥、砷
This study attempts to use a sintering process technology, water purification sludge adsorption arsenic solution (300ppb), made into a sludge containing arsenic and sintering bricks. Then assessment of sintered test material or burial of the feasibility study were controlled sintering temperature is 400�C, 600�C, 800�C, 900�C, 1000�C and 1100�C. The results showed that the sintering temperature is below 1000�C under the test conditions, due to particle bonding and neck growth has not yet reached the phenomenon, loosely sintered specimens, burning the material properties of the specimen-level analysis results are not yet in line with China National Standard (CNS) specification. When the sintering temperature of 1000�C or more, the sintered specimen volume shrinkage increased significantly, lower water absorption, the specimen densification, density and compressive strength were highly significant increase of the phenomenon, while the compressive strength and the sintered test Water absorption are in line with the general building bricks CNS of norms, and the compressive strength also meet two bricks of specification. The sintered specimens of the Toxicity Characteristic Leaching tests (TCLP) analysis showed that when the temperature rises As dissolution, although slightly on the rise by the 0.004ug / L to 0.47ug / L, but TCLP leaching concentrations were below regulatory control standards 5mg / L or less, in line with materials of environmental safety requirements. According to X-ray powder diffraction (XRD) results show that when the temperature is raised to 400�C crystalline phase generated at a temperature raised to 800�C, part of the crystalline phase is damaged, while when the temperature is raised to 1000�C crystalline phase damage is more obvious, solid judged raise the temperature will destroy the crystalline phase sintered specimen specimen TCLP leaching of lead increased.Keywords: sintering, water purification sludge, arsenic |
