| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8045716 | Applied Clay Science | 2018 | 9 Pages |
Abstract
This study presents how the bioaccessibility and biotransformation of Fe- oxides present in two different Fe rich clay samples influenced their sorption properties. The bentonite and kaolin were bioleached by heterotrophic indigenous bacteria for 15 and 30â¯days and following treated by 1â¯M and 6â¯M hydrochloric acid. By bioleaching, only slight content of Fe was removed from the natural samples, but content of hardly soluble Fe oxides decreased and amorphous oxide- hydroxide increased. This transformation related with decrease in value of specific surface area and total pore volume, as well as with morphological and pore changes of studied clays. After 30â¯days of bioleaching process, bioleached samples proved better adsorption parameters for the AsV and SbV adsorption in comparison to natural samples. The sorption efficiency of AsV/SbV adsorption on bioleached materials reached up to 95-99%, at which the bentonite was more sensitive to bioleaching.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Jaroslav Å uba, Zuzana Danková, Iveta Å tyriaková, Barbora DouÅ¡ová, Alexandra Bekényiová, Darina Å tyriaková,