Black shale as a sorbent for trichloroethylene and Cr(VI).
Environ Technol
; 26(6): 643-52, 2005 Jun.
Article
in En
| MEDLINE
| ID: mdl-16035657
ABSTRACT
Black shale was examined as a natural sorbent for organic and inorganic contaminants. Trichloroethylene (TCE) could be removed well from the water by sorption onto the locally available black shale because of the high organic carbon content (5.2%) of the black shale in this study. Hexavalent chromium Cr(VI) was mainly removed by ionic sorption and reduction in batch and column experiments. Amphiphilic humic acid was also sorbed onto the black shale and could facilitate the sorption of TCE at the same time. Humic acid also enhanced the removal of Cr(VI) by reduction and sorption, but the amount of Cr(VI) adsorbed (mg kg(-1)) was smaller than that of TCE. Considering that the black shale in this study was used without any modifications and has a small surface area, black shale can be a cost-effective natural geosorbent and additive to remove organic contaminants and heavy metals.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trichloroethylene
/
Chromium
/
Geology
Language:
En
Journal:
Environ Technol
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2005
Document type:
Article
Affiliation country:
Corea del Sur