Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico

Using the Microtox bioassay toxicity was determined in 16 areas located in eight sites: In contaminated areas, in areas with natural recovery, after bioremediation and phytoremediation projects and in control areas (uncontaminated). These areas correspond to the following ecosystems: mangrove, fresh...

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Main Authors: Adams, Randy H., Rodríguez, Verónica I. Domínguez, Cruz, Joel Zavala
Format: Article
Language:English
Published: Universiti Kebangsaan Malaysia 2015
Online Access:http://journalarticle.ukm.my/8475/1/04_Randy_H._Adams.pdf
http://journalarticle.ukm.my/8475/
http://www.ukm.my/jsm/
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Institution: Universiti Kebangsaan Malaysia
Language: English
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spelling my-ukm.journal.84752016-12-14T06:47:17Z http://journalarticle.ukm.my/8475/ Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico Adams, Randy H. Rodríguez, Verónica I. Domínguez Cruz, Joel Zavala Using the Microtox bioassay toxicity was determined in 16 areas located in eight sites: In contaminated areas, in areas with natural recovery, after bioremediation and phytoremediation projects and in control areas (uncontaminated). These areas correspond to the following ecosystems: mangrove, fresh water swamp (Pachira aquatica), marsh and pasture (in the coastal plain and Pliocene-Pleistocene terraces). A significant toxicity was detected in uncontaminated organic soils (22.2-49.1 toxicity units (TU)) which were comparable to levels found in hydrocarbon contaminated areas (22.3- 42.0 TU). Generally, the toxicity in organic soils was much higher than that found in mineral soils (which was from below quantification levels to 9.3 TU). In an area restored by phytoremediation, the simple method used by Petróleos Mexicanos achieved recovery and superficial detoxification in the treated plot, exhibiting a toxicity reduction of 2.4 times with respect to untreated soil and a toxicity even slightly lower than the uncontaminated control in the same ecosystem (22.2 TU). Likewise, a bioremediation project in pasture resulted in a toxicity reduction down to levels comparable to uncontaminated soil (from below quantification levels to 7.9 TU). A tendency to decrease toxicity in organic soils during the rainy season was observed, toxicity drop in 80% of the areas sampled. Based on these findings, recommendations are presented for use of this test method in regional diagnostic studies. Universiti Kebangsaan Malaysia 2015-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/8475/1/04_Randy_H._Adams.pdf Adams, Randy H. and Rodríguez, Verónica I. Domínguez and Cruz, Joel Zavala (2015) Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico. Sains Malaysiana, 44 (3). pp. 337-346. ISSN 0126-6039 http://www.ukm.my/jsm/
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description Using the Microtox bioassay toxicity was determined in 16 areas located in eight sites: In contaminated areas, in areas with natural recovery, after bioremediation and phytoremediation projects and in control areas (uncontaminated). These areas correspond to the following ecosystems: mangrove, fresh water swamp (Pachira aquatica), marsh and pasture (in the coastal plain and Pliocene-Pleistocene terraces). A significant toxicity was detected in uncontaminated organic soils (22.2-49.1 toxicity units (TU)) which were comparable to levels found in hydrocarbon contaminated areas (22.3- 42.0 TU). Generally, the toxicity in organic soils was much higher than that found in mineral soils (which was from below quantification levels to 9.3 TU). In an area restored by phytoremediation, the simple method used by Petróleos Mexicanos achieved recovery and superficial detoxification in the treated plot, exhibiting a toxicity reduction of 2.4 times with respect to untreated soil and a toxicity even slightly lower than the uncontaminated control in the same ecosystem (22.2 TU). Likewise, a bioremediation project in pasture resulted in a toxicity reduction down to levels comparable to uncontaminated soil (from below quantification levels to 7.9 TU). A tendency to decrease toxicity in organic soils during the rainy season was observed, toxicity drop in 80% of the areas sampled. Based on these findings, recommendations are presented for use of this test method in regional diagnostic studies.
format Article
author Adams, Randy H.
Rodríguez, Verónica I. Domínguez
Cruz, Joel Zavala
spellingShingle Adams, Randy H.
Rodríguez, Verónica I. Domínguez
Cruz, Joel Zavala
Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
author_facet Adams, Randy H.
Rodríguez, Verónica I. Domínguez
Cruz, Joel Zavala
author_sort Adams, Randy H.
title Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
title_short Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
title_full Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
title_fullStr Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
title_full_unstemmed Vibrio fischeri Bioassay for determination of toxicity in petroleum contaminated soils from Tropical Southeast Mexico
title_sort vibrio fischeri bioassay for determination of toxicity in petroleum contaminated soils from tropical southeast mexico
publisher Universiti Kebangsaan Malaysia
publishDate 2015
url http://journalarticle.ukm.my/8475/1/04_Randy_H._Adams.pdf
http://journalarticle.ukm.my/8475/
http://www.ukm.my/jsm/
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