CAJ | 학술논문

采用酸化焙烧法对凹凸棒土进行了改性，通过单因素试验对其制备条件进行了优化，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。试验结果表明，经400℃焙烧1.5 h、15%酸化后的颗粒白土对玉米秸秆稀酸水解液的脱色效果最佳；酸活化可除去凹土中的杂质，增加孔道，置换其金属离子，改善表面特性；焙烧热活化可除去不同状态的水，疏通其通道，增大孔容和比表面积，从而提高其吸附脱色能力。
채용산화배소법대요철봉토진행료개성，통과단인소시험대기제비조건진행료우화，차채용N2흡부-탈부、 X사선연사、소묘전경등표정수단대기탈색궤리진행료연구。시험결과표명，경400℃배소1.5 h、15%산화후적과립백토대옥미갈간희산수해액적탈색효과최가；산활화가제거요토중적잡질，증가공도，치환기금속리자，개선표면특성；배소열활화가제거불동상태적수，소통기통도，증대공용화비표면적，종이제고기흡부탈색능력。
The acidified calcined method was adapted to the modified attapulgite, and the optimized preparation con-ditions were obtained by the single factor experiment. The decoloring mechanism of particle clay was studied by BET, XRD, FE-SEM and so on. Result showed that the decolorization rate was best with calcination temperature 400℃, 1.5 hours ,and sulfuric acid concentration 15%. The acid activation could remove the impurity of the attapulgite to increase the channel and replace the metal ions to improve the surface properties;moreover the calcining thermal activation could remove the water during the attapulgite, and that could dredge the channel, increase the pore volume and the specific surface area, so as to improve the adsorption decolorizing ability of the particle clay.