Phytotoxicity of Domestic Effluent Before and After Treatment by Stabilization Ponds
DOI:
https://doi.org/10.5132/eec.2024.01.06Palavras-chave:
Brassica oleracea, Effluent, Kale, Seeds, ToxicityResumo
Phytotoxicity tests linked to physicochemical parameters can be used to determine the possible effects of releasing a polluting
load into the environment, evaluating the efficiency of a given treatment and its toxicity effects. In this context, the present
work sought to evaluate the phytotoxicity of domestic effluent before and after treatment by stabilization ponds, using
kale seeds (Brassica oleracea). Toxicity tests were carried out following the methodology of the American Environmental
Protection Agency (EPA, 1996) at concentrations of 100%, 80%, 40%, 20%, 10%, and 5%. The seeds were incubated
in a B.O.D. incubation chamber for five days at a temperature of 25ºC ± 2ºC. After this period, germination and root
elongation were analyzed. The samples were also analyzed for biochemical oxygen demand, temperature, pH, turbidity,
color, total solids, ammoniacal nitrogen, and organic nitrogen. Phytotoxicity was statistically evaluated by the Relative
Growth Index, T-test (p < 0.05) for samples at 100% concentration, and Kruskal-Wallis followed by Dunn’s test (p < 0.05)
to compare the negative control and the different concentrations. As a result, adverse effects of reduced root elongation were
observed in samples of raw effluent (100%, 80%, and 20%) and treated effluent (10% and 5%), indicating a tendency toward
phytotoxicity. Regarding the physicochemical parameters studied, all were within the established parameters by legislation,
and no significant correlation was observed with root elongation. This may indicate the efficiency of stabilization ponds in
treating domestic effluents, particularly in reducing phytotoxicity.
Downloads
Downloads
Publicado
Como Citar
Edição
Seção
Licença
Copyright (c) 2024 Ecotoxicology and Environmental Contamination
![Creative Commons License](http://i.creativecommons.org/l/by/4.0/88x31.png)
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
Copyright © 2006 ECOTOX-BRAZIL
Copyright notice: It is a condition for publication that manuscripts submitted to this journal have not yet been published and will not be simultaneously submitted or published of elsewhere. By submitting a manuscript, the authors agree that copyright for their article is transferred to the Sociedade Brasileira de Ecotoxicologia (ECOTOX-Brazil) if and when the article is accepted for publication. The copyright covers the exclusive rights to reproduce and distribute articles, including reprints, photographic reproductions or any other reproduction of a similar nature, including translations. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without permission of the publisher.
Notice: While every effort is made by the JBSE, editors and editorial board to see that no inaccurate or misleading data, opinions or statements appear in this journal, they wish to make it clear that the contents of the articles and advertisements published herein are the sole responsibility of the contributors or advertisers concerned. Accordingly, the JBSE, the editorial board and editors and their respective employees, officers and agents accept no responsibility or liability whatsoever for the consequences of any inaccurate or misleading data, opinion or statement.