Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay
Toxicity of a Cr(VI) solution before and after treatment by TiO2 heterogeneous photocatalysis (HP) was performed with AMPHITOX bioassay. Changes in toxicity on Rhinella arenarum larvae for 10-d were monitored after exposure to an untreated Cr(VI) solution and to the same solution after HP treatment....
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| Formato: | Texto completo |
| Idioma: | Inglés |
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Elsevier Science
2015
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| Acesso em linha: | https://ri.unsam.edu.ar/handle/123456789/1005 |
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ds-123456789-1005 |
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dspace |
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Repositorio Institucional |
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RI |
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Inglés |
| topic |
HETEROGENEOUS PHOTOCATALYSIS HEXAVALENT CHROMIUM AMPHITOX TEST CIENCIAS QUÍMICAS CIENCIAS NATURALES Y EXACTAS |
| spellingShingle |
HETEROGENEOUS PHOTOCATALYSIS HEXAVALENT CHROMIUM AMPHITOX TEST CIENCIAS QUÍMICAS CIENCIAS NATURALES Y EXACTAS Hojman, Jonatan Y. Meichtry, Jorge Martin Litter, Marta Irene Perez Coll, Cristina Silvia Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| description |
Toxicity of a Cr(VI) solution before and after treatment by TiO2 heterogeneous photocatalysis (HP) was performed with AMPHITOX bioassay. Changes in toxicity on Rhinella arenarum larvae for 10-d were monitored after exposure to an untreated Cr(VI) solution and to the same solution after HP treatment. The HP treatment of a 41.60 mg L−1 Cr(VI) solution reduced to 37.5% the concentration of the metal ion. A 10-fold reduction in toxicity at acute exposure (72 h) and 150-fold reduction in toxicity after 240 h was found. Further, the LOEC value increased from 0.001% for the untreated solution to 0.153% after HP treatment. Moreover, the safe concentration in untreated solution corresponded to 0.0001% sample, and it was 0.01% after the treatment, i.e., 100 times higher. A saving of water of about 100,000 L per L of effluent would be possible through dilution to allow safer concentrations for discharge; the saving would reach the highest value (1,000,000 L per L) at 240 h. Sub-lethal effects were completely absent in larvae exposed to the treated solution. The AMPHITOX test allowed to detect chronic effects at low Cr concentrations, i.e. at environmentally relevant levels. |
| format |
Texto completo |
| author |
Hojman, Jonatan Y. Meichtry, Jorge Martin Litter, Marta Irene Perez Coll, Cristina Silvia |
| author_facet |
Hojman, Jonatan Y. Meichtry, Jorge Martin Litter, Marta Irene Perez Coll, Cristina Silvia |
| author_sort |
Hojman, Jonatan Y. |
| title |
Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| title_short |
Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| title_full |
Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| title_fullStr |
Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| title_full_unstemmed |
Abatement of toxicity of effluents containing Cr(VI) by heterogeneous photocatalysis. Toxicity assessment by AMPHITOX assay |
| title_sort |
abatement of toxicity of effluents containing cr(vi) by heterogeneous photocatalysis. toxicity assessment by amphitox assay |
| publisher |
Elsevier Science |
| publishDate |
2015 |
| url |
https://ri.unsam.edu.ar/handle/123456789/1005 |
| work_keys_str_mv |
AT hojmanjonatany abatementoftoxicityofeffluentscontainingcrvibyheterogeneousphotocatalysistoxicityassessmentbyamphitoxassay AT meichtryjorgemartin abatementoftoxicityofeffluentscontainingcrvibyheterogeneousphotocatalysistoxicityassessmentbyamphitoxassay AT littermartairene abatementoftoxicityofeffluentscontainingcrvibyheterogeneousphotocatalysistoxicityassessmentbyamphitoxassay AT perezcollcristinasilvia abatementoftoxicityofeffluentscontainingcrvibyheterogeneousphotocatalysistoxicityassessmentbyamphitoxassay |
| _version_ |
1747968923749318656 |