Effects of organic matter addition on chronically hydrocarbon‐contaminated soil

Soil is the recipient of organic pollutants as a consequence of anthropogenic activities. Hydrocarbons are contaminants that pose a risk to human and environmental health. Bioremediation of aging contaminated soils is a challenge due to the low biodegradability of contaminants as a result of their i...

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Autores principales: Medina, Rocío, David Gara, Pedro Maximiliano, Rosso, Janina Alejandra, Del Panno, María Teresa
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Física
Química
Ciencias Exactas
Bioremediation
Chronically hydrocarbon-polluted soil
Composting
Microbial community
Phytotoxicity assays
Stimulation with compost
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138092
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-138092
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Química
Ciencias Exactas
Bioremediation
Chronically hydrocarbon-polluted soil
Composting
Microbial community
Phytotoxicity assays
Stimulation with compost
spellingShingle Física
Química
Ciencias Exactas
Bioremediation
Chronically hydrocarbon-polluted soil
Composting
Microbial community
Phytotoxicity assays
Stimulation with compost
Medina, Rocío
David Gara, Pedro Maximiliano
Rosso, Janina Alejandra
Del Panno, María Teresa
Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
topic_facet Física
Química
Ciencias Exactas
Bioremediation
Chronically hydrocarbon-polluted soil
Composting
Microbial community
Phytotoxicity assays
Stimulation with compost
description Soil is the recipient of organic pollutants as a consequence of anthropogenic activities. Hydrocarbons are contaminants that pose a risk to human and environmental health. Bioremediation of aging contaminated soils is a challenge due to the low biodegradability of contaminants as a result of their interaction with the soil matrix. The aim of this work was to evaluate the effect of both composting and the addition of mature compost on a soil chronically contaminated with hydrocarbons, focusing mainly on the recovery of soil functions and transformations of the soil matrix as well as microbial community shifts. The initial pollution level was 214 ppm of polycyclic aromatic hydrocarbons (PAHs) and 2500 ppm of aliphatic hydrocarbons (AHs). Composting and compost addition produced changes on soil matrix that promoted the release of PAHs (5.7 and 15 % respectively) but not the net PAH elimination. Interestingly, composting stimulated AHs elimination (about 24 %). The lack of PAHs elimination could be attributed to the insufficient PAHs content to stimulate the microbial degrading capacity, and the preferential consumption of easily absorbed C sources by the bacterial community. Despite the low PAH catabolic potential of the aging soil, metabolic shift was driven by the addition of organic matter, which could be monitored by the ratio of Proteobacteria to Actinobacteria combined with E4/E6 ratio. Regarding the quality of the soil, the nutrients provided by the exogenous organic matter contributed to the recovery of the global functions and species diversity of the soil along with the reduction of phytotoxicity.
format Articulo
Articulo
author Medina, Rocío
David Gara, Pedro Maximiliano
Rosso, Janina Alejandra
Del Panno, María Teresa
author_facet Medina, Rocío
David Gara, Pedro Maximiliano
Rosso, Janina Alejandra
Del Panno, María Teresa
author_sort Medina, Rocío
title Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
title_short Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
title_full Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
title_fullStr Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
title_full_unstemmed Effects of organic matter addition on chronically hydrocarbon‐contaminated soil
title_sort effects of organic matter addition on chronically hydrocarbon‐contaminated soil
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/138092
work_keys_str_mv AT medinarocio effectsoforganicmatteradditiononchronicallyhydrocarboncontaminatedsoil
AT davidgarapedromaximiliano effectsoforganicmatteradditiononchronicallyhydrocarboncontaminatedsoil
AT rossojaninaalejandra effectsoforganicmatteradditiononchronicallyhydrocarboncontaminatedsoil
AT delpannomariateresa effectsoforganicmatteradditiononchronicallyhydrocarboncontaminatedsoil
bdutipo_str Repositorios
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