CAJ | 학술논문

采用焙烧酸化法对凹凸棒土进行了改性，通过单因素实验对凹凸棒土的热改性条件进行了优化，且采用N2吸附-脱附、X射线衍射、扫描电镜等表征手段对其脱色机理进行了研究。结果表明，对玉米秸秆稀酸水解液的脱色效果最佳的凹凸棒土热改性条件：450℃焙烧2 h、酸浓度10%。酸化作用使凹土内粒间杂质胶结物和碳酸盐矿物分解，疏通内部孔道，H+与凹土结构内阳离子置换，增大比表面积，改善其表面特性；焙烧活化可除去不同状态的水，改变其结构，增大孔容和比表面积；两者结合处理使颗粒白土的吸附脱色能力提高。
채용배소산화법대요철봉토진행료개성，통과단인소실험대요철봉토적열개성조건진행료우화，차채용N2흡부-탈부、X사선연사、소묘전경등표정수단대기탈색궤리진행료연구。결과표명，대옥미갈간희산수해액적탈색효과최가적요철봉토열개성조건：450℃배소2 h、산농도10%。산화작용사요토내립간잡질효결물화탄산염광물분해，소통내부공도，H+여요토결구내양리자치환，증대비표면적，개선기표면특성；배소활화가제거불동상태적수，개변기결구，증대공용화비표면적；량자결합처리사과립백토적흡부탈색능력제고。
The calcined acidified method was adopted to the modified attapulgite,and the optimized prepa-ration conditions was obtained by the single factor experiments. The decoloring mechanism of particle clay was studied by BET,XRD,FE-SEM and so on. The result shows that the decolorization rate was best with calcination temperature 450℃ and 2 h and sulfuric acid concentration 10%. The acid activation made the intergranular impurities inside the particle clay and carbonate minerals decomposition. That degradated the channel,increased the surface area and replaced the metal ions to improve the surface properties;the cal-cined thermal activation removed the water during the attapulgite to dredge the channel and improve the structure,increase the pore volume and the specific surface area. The combination of calcination and acid-ification improved the adsorption decolorizing ability of the particle clay.