Fe^(3+)-蒙脱石/土壤有机质复合材料的制备及其固相光催化降解菲的性能研究  

Preparation of Fe^(3+)-smectite-SOM(soil organic material)complexes and their solid-phase photocatalytic activity on phenanthrene degradation

作　　者：李莉[1,2] 贾汉忠[1] 

机构地区：[1]中国科学院新疆理化技术研究所,乌鲁木齐830011 [2]中国科学院大学,北京100049

出　　处：《化工新型材料》2015年第8期54-56,共3页New Chemical Materials

基　　金：国家自然科学基金(41301543);中科院"西部之光"项目(XBBS201112)

摘　　要：胡敏酸和富里酸是土壤有机质的重要组成部分。将胡敏酸和富里酸分别与Fe3+-蒙脱石复合,制备出了Fe3+-蒙脱石/胡敏酸和Fe3+-蒙脱石/富里酸复合材料。利用元素分析、XRD和SEM等表征手段,分析了胡敏酸和富里酸对Fe3+-蒙脱石的形貌及层间距的改变。利用这两种复合材料固相光催化降解菲,结果表明:降解效果与胡敏酸和富里酸的加入量有关,且胡敏酸和富里酸的加入量存在临界值,分别为0.6465mg/g和0.7035mg/g。当加入量小于临界值时促进了菲的降解而加入量大于临界值时则会抑制降解反应的进行。Humic acid（HA） and fulvic acid（FA） are critical components for soil organic matter（SOM）. HA-Fe3＋- smectite and FA-Fe3＋-smectite were prepared by adding desired amount of HA and FA into Fe3＋-smectite suspensions. By element analysis,XRD, and SEM, the change of morphology and basal spacing in Fe3＋-smectite were characterized. The photodegradation experiments of phenanthrene under visible light were conducted on HA-Fe3＋-smectite and FA-Fe3＋- smectite, respectively. It was found that the degradation effects were related to the amount of HA and FA and there were a critical amount for HA and FA, respectively. Photodegradation reaction was accelerated, when the addition amount was less than the critical value,whereas it would be suppressed when the amount over the certain critical value. The critical content were believed to be 0. 7035mg/g for FA and 0. 6465mg/g for HA.

关 键 词：蒙脱土 胡敏酸 富里酸 固相光催化 菲 

分 类 号：TB332[一般工业技术—材料科学与工程] O643.36[理学—物理化学]