多光谱表征酸碱电位滴定对天然伊利石表面结构与性质的影响.PDF

DO I :10.13671/j .hjkxxb.2002.01.023 22 1 　　　　　 Vol.22, No.1 2002 1 ACTA SCIENTIAE CIRCUMSTANTIAE Jan., 2002 :0253-2468(2002)-0 1-0 111-06 　　　:X131.2 　　　:A 刘文新, 汤鸿霄　(, , 　100085) :.XRD , , , Si —O Al—O 27 , . Al , , , .、 . :;;;;; Spectroscopic investigation of altertions of illite surface properties by acid-base titration LIU Wenxin, TANG Hongxiao 　　(S aye Key Lab.of Environmen al A qua ic Chemis ry, Reseach for Eco-environmen al Science, Chinese Academy of Sciences, Beijing　100085) Abstract:Spec roscopic approaches were applied o s udy he changes in surface proper ies of differen na ural illi es, caused by acid-base po- en iome ric i ra ion.Based on ma ching resul swi h he s andard XRD pa erns, he changes in in ensi ies of he diagnos ic reflec ions indica - ed ha he forma ion of surface Al—Si complexes.Similar fea ures were also shown in he mi croscopic Raman spec ra, where he vibra ional peaks of Si—O and Al—O bonds diminished following acid a ack, hen rose again af er hydroxide back i ra ion.The varied ra io of signal in- ensiy be ween IV Al and V IAl species i n he 27Al NM R spec ra, oge her wi h he nearly s able BET surface areas af er acidi c i ra ion, i nferred ha he basal planes in he layer ex ure of na ural illi e con ribu ed o he release of s ruc ural componen s as well as he edge faces.The com- bined spec roscopic evidence sugges ed he in erac ions of illi e surface si es wi h silicic acid and hydrolyzed aluminum, genera ing from dissolu- ion of illi e subs ra e. Keywords:na ural illi es, acid-base i ra ion, spec roscopic evidence, surface Al—Si species, surface complexa ion [1] 、, . , 、(hydrous aluminosilica es, HAS).HAS [2,3] (、).,