Phytotoxicity of effluents from swine slaughterhouses using lettuce and cucumber seeds as bioindicators.
Sci Total Environ
; 592: 86-90, 2017 Aug 15.
Article
em En
| MEDLINE
| ID: mdl-28314134
This study evaluated the phytotoxic effects of raw and treated effluents from a swine slaughterhouse on cucumber and lettuce seeds and determined correlations among physicochemical characteristics of such effluents and the germination of seeds used as bioindicators. Physicochemical parameters were characterized for both effluents and their phytotoxicity was determined through the germination index (GI), the root length (RL) and the number of germinated seeds (SG) for both plant species. The effluents treatment system was efficient to reduce the concentration of some physicochemical parameters to levels within those recommended by the Brazilian legislation, except for P, ammoniacal N and TKN concentration. Although phytotoxicity of the treated effluent was less in comparison to the raw effluent, the GI for cucumber and lettuce seeds submitted to each of the tested effluents was lower than 80%. Thus, both effluents were phytotoxic for the tested bioindicators (p<0.05). For lettuce seeds, the GI presented negative correlations (p<0.05) with the total Kjeldahl N (-0.93) and the surfactants concentration (-0.83) in the raw effluent. The Zn concentration in the treated effluent showed a negative correlation (p<0.05) with the GI of both lettuce (-0.63) and cucumber seeds (-0.64). Therefore, effluents from swine slaughterhouses may impair the germination of the evaluated plant species if used for agricultural purposes.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sementes
/
Resíduos
/
Matadouros
/
Germinação
/
Esterco
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Sci Total Environ
Ano de publicação:
2017
Tipo de documento:
Article
País de publicação:
Holanda