CAJ | 학술논문

　　通过差热、X射线衍射、比表面测定等综合分析了凹凸棒石黏土在热处理过程中矿物结构的变化，并结合吸附试验，研究了热加工对凹凸棒石黏土吸附特性的影响。结果表明，在104~140℃，凹凸棒石脱去外表面吸附水；在280℃，脱去孔道吸附水；到480℃，脱除部分结晶水，凹凸棒石结构开始出现折叠；达700℃时，晶层结构坍塌，结构折叠，孔道被阻塞，凹凸棒石黏土表面积、孔容值和CEC数值急剧下降，并形成新的矿物晶相；在870℃左右，脱除其余结晶水和结构水。热加工显著提高了凹凸棒石黏土对磷污染水体的吸附净化能力，其中以700℃热处理凹凸棒石黏土的磷吸附能力最强，其对实际水体的磷素吸附净化效率可达97%。
　　통과차열、X사선연사、비표면측정등종합분석료요철봉석점토재열처리과정중광물결구적변화，병결합흡부시험，연구료열가공대요철봉석점토흡부특성적영향。결과표명，재104~140℃，요철봉석탈거외표면흡부수；재280℃，탈거공도흡부수；도480℃，탈제부분결정수，요철봉석결구개시출현절첩；체700℃시，정층결구담탑，결구절첩，공도피조새，요철봉석점토표면적、공용치화CEC수치급극하강，병형성신적광물정상；재870℃좌우，탈제기여결정수화결구수。열가공현저제고료요철봉석점토대린오염수체적흡부정화능력，기중이700℃열처리요철봉석점토적린흡부능력최강，기대실제수체적린소흡부정화효솔가체97%。
The mineral structural properties of attapulgite during thermal treatment were studied by differential thermal analysis, X-ray diffraction and BET surface area measurements, and adsoprtion characteristic of thermally treated samples was investigated by adsorption experiments. The results indicated that water adsorbed in the outside surface and channel of the attapulgite samples was dehydrated during 104~140℃and 280℃, respectively. Some of the water in the samples was lost at 480℃, resulting in a structural fold of attapulgite. When the temperature was 700℃, the layer structure was collapsed and folded, the tunnel was blocked, which made the BET surface area, micropore volumn and CEC data decreased adruptly, and some new calcium–aluminum silicate appeared. Residual water and hydroxyls in the samples were lost at 870℃. Thermal activation increased the phosphate adsorption capacity and the highest phosphate adsorption capacity occurred at 700℃, whose purification efficiency of phosphorus adsorption could reach up to 97%in actual polluted water.