Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment
<p>In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (<italic>Lactuca sa...
Main Authors: | , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Instituto Internacional de Ecologia
|
Series: | Brazilian Journal of Biology |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000300010&lng=en&tlng=en |
id |
doaj-3d4237bf629d42a288516914c97a3188 |
---|---|
record_format |
Article |
spelling |
doaj-3d4237bf629d42a288516914c97a31882020-11-24T23:33:46ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375752 suppl576210.1590/1519-6984.1813S1519-69842015000300010Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatmentCR KlauckMAS RodriguesLB Silva<p>In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (<italic>Lactuca sativa</italic> L.) and rocket plant (<italic>Eruca sativa</italic> Mill.) and root elongation of onions (<italic>Allium cepa</italic> L.). Bioassays were performed by exposing the seeds of <italic>L. sativa</italic> and <italic>E. sativa</italic> and the roots of <italic>A. cepa</italic> to raw leachate, treated leachate (biological treatment) and negative control (tap water). The levels of metals detected in both samples of leachate were low, and raw leachate showed high values for ammoniacal nitrogen and total Kjeldahl nitrogen. There is a reduction in the values of several physicochemical parameters, which demonstrates the efficiency of the treatment. Both <italic>L. sativa</italic> and <italic>A. cepa</italic>showed a phytotoxic response to landfill leachate, showing reduced root elongation. However, the responses of these two plant species were different. Root elongation was significantly lower in <italic>A. cepa</italic> exposed to treated leachate, when compared to negative control, but did not show any difference when compared to raw leachate. In <italic>L. sativa</italic>, seeds exposed to the raw leachate showed significant reduction in root elongation, when compared to treated leachate and negative control. Seed germination showed no difference across the treatments. The results of the study show that plant species respond differently and that municipal solid waste landfill leachate show phytotoxicity, even after biological treatment.</p>http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000300010&lng=en&tlng=enplant bioassayswater pollutionwastewater treatmenttoxic effects |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
CR Klauck MAS Rodrigues LB Silva |
spellingShingle |
CR Klauck MAS Rodrigues LB Silva Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment Brazilian Journal of Biology plant bioassays water pollution wastewater treatment toxic effects |
author_facet |
CR Klauck MAS Rodrigues LB Silva |
author_sort |
CR Klauck |
title |
Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
title_short |
Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
title_full |
Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
title_fullStr |
Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
title_full_unstemmed |
Evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
title_sort |
evaluation of phytotoxicity of municipal landfill leachate before and after biological treatment |
publisher |
Instituto Internacional de Ecologia |
series |
Brazilian Journal of Biology |
issn |
1678-4375 |
description |
<p>In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (<italic>Lactuca sativa</italic> L.) and rocket plant (<italic>Eruca sativa</italic> Mill.) and root elongation of onions (<italic>Allium cepa</italic> L.). Bioassays were performed by exposing the seeds of <italic>L. sativa</italic> and <italic>E. sativa</italic> and the roots of <italic>A. cepa</italic> to raw leachate, treated leachate (biological treatment) and negative control (tap water). The levels of metals detected in both samples of leachate were low, and raw leachate showed high values for ammoniacal nitrogen and total Kjeldahl nitrogen. There is a reduction in the values of several physicochemical parameters, which demonstrates the efficiency of the treatment. Both <italic>L. sativa</italic> and <italic>A. cepa</italic>showed a phytotoxic response to landfill leachate, showing reduced root elongation. However, the responses of these two plant species were different. Root elongation was significantly lower in <italic>A. cepa</italic> exposed to treated leachate, when compared to negative control, but did not show any difference when compared to raw leachate. In <italic>L. sativa</italic>, seeds exposed to the raw leachate showed significant reduction in root elongation, when compared to treated leachate and negative control. Seed germination showed no difference across the treatments. The results of the study show that plant species respond differently and that municipal solid waste landfill leachate show phytotoxicity, even after biological treatment.</p> |
topic |
plant bioassays water pollution wastewater treatment toxic effects |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000300010&lng=en&tlng=en |
work_keys_str_mv |
AT crklauck evaluationofphytotoxicityofmunicipallandfillleachatebeforeandafterbiologicaltreatment AT masrodrigues evaluationofphytotoxicityofmunicipallandfillleachatebeforeandafterbiologicaltreatment AT lbsilva evaluationofphytotoxicityofmunicipallandfillleachatebeforeandafterbiologicaltreatment |
_version_ |
1725530845913022464 |