摘要
对几种常见矿物及其与硼反应的红外光谱比较发现 ,硼在供试矿物上解吸的图谱更接近硼在矿物上吸附的图谱 ,而与无硼矿物图谱相差较大 ,故硼在几种常见矿物上都表现出不同程度的滞后性。针铁矿吸附硼后 ,在 1 40 0～ 1 44 0cm- 1 和 1 0 0 0～ 1 2 0 0cm- 1 范围处谱峰有不同程度的增强 ;水锰矿、三羟铝石和Ca 蒙脱石吸附硼后 ,此处谱峰却减弱 ,而在30 0 0～ 360 0cm- 1 处的谱峰 ,也随硼的吸附而明显减弱 ;Ca 蒙脱、三羟铝石吸附硼后 ,其图谱在 1 40 0～ 1 44 0cm- 1 和 1 62 0～ 1 670cm- 1 处的谱峰变化相似 ;水锰矿吸附硼的图谱在 1 0 0 0cm- 1 和 1 40 0～ 1 44 0cm- 1 处与三羟铝石吸附硼的图谱也有相似之处。
IR spectral characteristics of several minerals after boron adsorption or desorp tion showed that, compared to the minerals themselves, spectra of boron desorbed from the minerals were similar to those of boron adsorbed, therefore, hysteresi s of boron desorption was significant for most of the experimental minerals. Spe ctra of Ca montmorillite and bayerite at 1 400～1 440 cm -1 and 1 600～1 67 0 cm -1 were alike, which showed that aluminum located at broken edge of Ca montmorillite would reacted with boron. Spectra of manganite were similar to b ayerite at 1 000 cm -1 and 1 400～1 440 cm -1 , and this showed that cha racters of boron adsorption for these two hydroxides were alike. The infrared sp ectra showed at 1 400～1 440 cm -1 after goethite absorbing boron peaks wer e enhanced, especially, at 1 000～1 200 cm -1 ,the absorption peak of tetra hedral boron when boron desorption from goethite significantly occurred. From th ese we can reason out that boron adsorbed on the mineral may polymerize itself a nd this process would produce boron polymer in the mineral surface, for example, like borax.
出处
《土壤学报》
CAS
CSCD
北大核心
2002年第5期671-678,共8页
Acta Pedologica Sinica
基金
国家自然科学基金资助项目 (批准号 :3 9670 42 5 )
关键词
硼
红外光谱
吸附-解吸
矿物
Boron, Adsorption desorption, Infrared spectra, Minerals
