Comparison of transport and attachment behaviors of Cryptosporidium parvum oocysts and oocyst-sized microspheres being advected through three minerologically different granular porous media

Water Research
Arvind MohanramD D Eberl

Abstract

In order to gain more information about the fate of Cryptosporidium parvum oocysts in tropical volcanic soils, the transport and attachment behaviors of oocysts and oocyst-sized polystyrene microspheres were studied in the presence of two soils. These soils were chosen because of their differing chemical and physical properties, i.e., an organic-rich (43-46% by mass) volcanic ash-derived soil from the island of Hawaii, and a red, iron (22-29% by mass), aluminum (29-45% by mass), and clay-rich (68-76% by mass) volcanic soil from the island of Oahu. A third agricultural soil, an organic- (13% by mass) and quartz-rich (40% by mass) soil from Illinois, was included for reference. In 10-cm long flow-through columns, oocysts and microspheres advecting through the red volcanic soil were almost completely (98% and 99%) immobilized. The modest breakthrough resulted from preferential flow-path structure inadvertently created by soil-particle aggregation during the re-wetting process. Although a high (99%) removal of oocysts and microsphere within the volcanic ash soil occurred initially, further examination revealed that transport was merely retarded because of highly reversible interactions with grain surfaces. Judging from the slope of...Continue Reading

Citations

Feb 6, 2013·Water Research·Noam WeisbrodVitaly Gitis
Aug 16, 2016·Environmental Science & Technology·Sangho JeonWei Zhang
Dec 14, 2011·Applied and Environmental Microbiology·Aurélien DumètreIsabelle Villena
Jul 4, 2012·Journal of Environmental Quality·Johanna SantamaríaCharles P Gerba
Mar 22, 2019·Environmental Science & Technology·Joel P StokdykMark A Borchardt

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