Phosphorus sorption capacity of different types of opoka
2007 (English)In: Annals of Warsaw University of Life Sciences – SGGW Land Reclamation, ISSN 1898-8857, Vol. 38, 11-18 p.Article in journal (Refereed) Published
Phosphorus sorption capacity ofdifferent types of opoka. The bedrock opoka hasbeen lately reported as an appropriate reactivemedia for onsite wastewater treatment systemsdue to its high phosphorus (P) sorption capacity.However, variations on its chemical compositionmay affect its reactivity with P, therefore leadingto a variable P removal effi ciency. In this paper,the P-sorption capacity of three different typesof opoka from the region of Miechów, Poland,is reported. According to the silica and carbonatecontent, opoka samples were classifi ed as light--weight and heavy-weight opoka. When heatedover 900°C, opoka showed a very high P-sorptioncapacity that was well correlated to its Ca content.P-sorption isotherms from batch experiments withan artifi cial P solution were plotted and fi tted tothe Langmuir and Freundlich adsorption models.The Freundlich isotherm appeared to model betterthe P-sorption of light opoka and the Langmuirisotherm of heavy opoka, suggesting differentdominating mechanisms of P-sorption by lightand heavy opoka.
Place, publisher, year, edition, pages
2007. Vol. 38, 11-18 p.
calcium, freundlich isotherm, langmuir isotherm, opoka, phosphorus removal, silica, sorption
Oceanography, Hydrology, Water Resources
IdentifiersURN: urn:nbn:se:kth:diva-7346OAI: oai:DiVA.org:kth-7346DiVA: diva2:12338
QC 201011032007-06-202007-06-202010-11-03Bibliographically approved