Effect of Na2Co3 activation and sedimentation on surface area, particle size, and pore size distribution of Pakistani Ca-bentonite

doi:10.1007/s12517-018-3742-9

	Effect of Na2Co3 activation and sedimentation on surface area, particle size, and pore size distribution of Pakistani Ca-bentonite
	Shah, Liaqat Ali 1,2
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2018-08-01
卷号	11 期号:15 页码:7
关键词	Porosity Sodium montmorillonite Nowshera district Na2CO3 activation Purification Pakistan
ISSN号	1866-7511
DOI	10.1007/s12517-018-3742-9
英文摘要	In this research paper, the purified Na+-bentonite powder was prepared, and its textural characterizations were carried out. Bentonite with 67% montmorillonite, collected from Nowshera region of Khyber Pakhtunkhwa (Pakistan), was taken as a primary sample. The sample was activated with Na2CO3 at the following different mass ratios: 2, 3, 5, and 8%. The activated samples were then purified by sedimentation to eliminate the non-porous minerals. The Na+-bentonite has obtained at 5% Na2CO3 activation as confirmed by the X-ray diffraction. The obtained Na+-bentonite was found free of non-clay minerals. The particle sizes of Na+-bentonite were found considerably smaller in comparison to raw sample. Almost all of the particles were smaller than 4 mu m. This seems that the sodium exchange in the activated sample has a valuable impact on its dispersion in aqueous media during particle size measurement. The incredibly high variation in specific surface area, mesopore area/volume, and micropore area/volume were observed after activation. With regard to the mesopore volume/area at smaller pore size, the result of the soda activated sample was found incredibly higher; however, their total pore volume was smaller and total pore area was found about 45% higher. This may be attributed to the high montmorillonite contents and/or the number of layer reduction in tactoids due to interlayer cations replacement by Na+. The higher number of smaller radii pores production, in the case of soda activated sample, results in higher porous structure and the specific surface area which suggest its use as a valuable industrial raw material specifically for the purpose of pharmaceutical and cosmetics, adsorbents, and catalysts.
WOS关键词	NON-CLAY MINERALS ; WATER-VAPOR ; HOMOIONIC MONTMORILLONITE ; EXCHANGED CATION ; CARBON-DIOXIDE ; SWELLING CLAYS ; ADSORPTION ; DESORPTION ; MECHANISM ; NITROGEN
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000440146300001
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/25370]
专题	中国科学院过程工程研究所
通讯作者	Shah, Liaqat Ali
作者单位	1.Univ Peshawar, Dept Phys, Peshawar 25120, KP, Pakistan 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Shah, Liaqat Ali. Effect of Na2Co3 activation and sedimentation on surface area, particle size, and pore size distribution of Pakistani Ca-bentonite[J]. ARABIAN JOURNAL OF GEOSCIENCES,2018,11(15):7.
APA	Shah, Liaqat Ali.(2018).Effect of Na2Co3 activation and sedimentation on surface area, particle size, and pore size distribution of Pakistani Ca-bentonite.ARABIAN JOURNAL OF GEOSCIENCES,11(15),7.
MLA	Shah, Liaqat Ali."Effect of Na2Co3 activation and sedimentation on surface area, particle size, and pore size distribution of Pakistani Ca-bentonite".ARABIAN JOURNAL OF GEOSCIENCES 11.15(2018):7.