Sorption of Chromate by Clinoptilolite Modified With Alkylammonium Surfactants

Open access

Sorption of Chromate by Clinoptilolite Modified With Alkylammonium Surfactants

Clinoptilolite from Dylągówka (Poland) with an external cation exchange capacity (ECEC) of 16 meq/100 g determined by adsorption of alkylammonium ions was treated with hexadecyltrimethylammonium (C16) and dioctadecyldimethylammonium (2C18) bromides in amounts equivalent to 1.0 and 1.5 ECEC. The products were characterized using IR spectroscopy and C and N determinations. The sorption of chromate on the modified mineral was measured spectrophotometrically as a function of pH, concentration of Cr(VI) or the proportion of the sorbent to solution. The amount of chromate removed from the solution continuously decreased with increasing pH in the range 1.3-10. At pH 2.6-3.1, the maximum adsorption of Cr(VI) by the organo-zeolites (103 and 124 mmol/kg) was observed for the samples modified using a 1.5 ECEC surfactant concentration. Considerably lower adsorption values (37 and 46 mmol/kg) were obtained with sorbents prepared using a 1.0 ECEC concentration of the alkylammonium ions.

APHA, 1992: Standard methods for the examination of water and wastewater. American Public Health Association, 18th ed.

BAJDA T., KŁAPYTA Z., 2004: Sorption of chromate by clinoptilolite and montmorillonite modified with alkylammonium surfactants. Acta Mineralogica-Petrographica Abstract Series 4, 11.

BOWMAN R.S., 2003: Applications of surfactant-modified zeolites to environmental remediation. Microporous and Mesoporous Materials 61, 43-56.

BOYD S.A., MORTLAND M.M., CHIOU C.T., 1988: Sorption characteristics of organic compounds on hexadecyltrimethylammonium smectite. Soil Science Society of America Journal 52, 652-657.

FRANUS W., DUDEK K., 1999: Clay minerals and clinoptilolite from Variegated Shale Member, the Polish Flysch Carpathians. Geologia Carpathica 50, 23-24.

FRANUS W., 2002: Studium geologiczno-mineralogiczne skaŁ ilastych formacji pstrych Łupków jednostki skolskiej. Prace Mineralogiczne PAN 92, 1-60.

HAGGERTY G.M., BOWMAN R.S., 1994: Sorption of chromate and other inorganic anions by organozeolite. Environmental Science and Technology 28, 452-458.

KRISHNA B.S., MURTY D.S.R., JAI PRAKASH B.S., 2001: Surfactant-modified clay as adsorbent for chromate. Applied Clay Sciences 20, 65-71.

STOCKMEYER M.R., 1991: Adsorption of organic compounds on organophilic bentonites. Applied Clay Sciences 6, 39-57.

WIESER T., 1969: Clinoptilolite from Lower Eocene variegated shales of the External Flysch Carpathians. Bulletin de l'Academie Polonaise des Sciences, Serie Sciences Geologiques et Geographiques 17, 123-129.


The Journal of Mineralogical Society of Poland

Journal Information

CiteScore 2017: 0.82

SCImago Journal Rank (SJR) 2017: 0.272
Source Normalized Impact per Paper (SNIP) 2017: 0.342


All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 89 89 2
PDF Downloads 41 41 4