Toxicity assessment of arsenic and cobalt in the presence of aquatic humic substances of different molecular sizes
| Autor: | Cláudia Hitomi Watanabe, Vivian Silva Lira, Nirmal Tej Kumar, André Henrique Rosa, Carolina de Castro Bueno, Adnivia Santos Costa Monteiro, Renata Fracácio, Erik S. J. Gontijo |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Health
Toxicology and Mutagenesis chemistry.chemical_element Humic substances 010501 environmental sciences complex mixtures 01 natural sciences Arsenic Animals Ecosystem Humic Substances 0105 earth and related environmental sciences biology Toxicity Aquatic ecosystem 010401 analytical chemistry Public Health Environmental and Occupational Health Ceriodaphnia dubia General Medicine Environmental exposure Environmental Exposure Cobalt Contamination biology.organism_classification Cladocera C. dubia Pollution 0104 chemical sciences chemistry Environmental chemistry Molecular size Water Pollutants Chemical |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Web of Science |
| Popis: | Made available in DSpace on 2018-11-26T15:43:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-05-01 R&D project at UNESP, Sorocaba, SP, Brazil Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) National Research and Development Council (CNN) using environmentally relevant concentrations of arsenic and cobalt were conducted both in the presence and absence of aquatic humic substances (AHS) and the fractions of different molecular sizes in the range of (< 5, 5-10;10-30; 30-100 and > 100kDa) using the microcrustacean Ceriodaphnia dubia. AHS together with arsenic reduced the toxicity, and the toxicity decreased in fractions of larger molecular size AHS. Despite the presence of cobalt, the reduction in toxicity was not observed and that depended on the molecular size of AHS. There was a trend of enhanced toxicity for Co in fractions of larger molecular sizes, opposed to that found for arsenic. Thus, the humic substances alter toxicity of trace elements, and this effect varies depending on the size of the humic substances Sao Paulo State Univ UNESP, Inst Sci & Technol, Campus Sorocaba,Av Tres Marco,511-Alto Boa Vista, BR-18087180 Sorocaba, SP, Brazil Sao Paulo State Univ UNESP, Inst Chem, Campus Araraquara,Av. Prof Francisco Degni,55-Jar, BR-14800060 Araraquara, SP, Brazil Sao Paulo State Univ UNESP, Inst Sci & Technol, Campus Sorocaba,Av Tres Marco,511-Alto Boa Vista, BR-18087180 Sorocaba, SP, Brazil Sao Paulo State Univ UNESP, Inst Chem, Campus Araraquara,Av. Prof Francisco Degni,55-Jar, BR-14800060 Araraquara, SP, Brazil FAPESP: 2012./19580-4 FAPESP: 2014/20979-4 FAPESP: 2013/24168-8 FAPESP: 2016/08215-4 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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