Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media

Bioretention system is one of the most used green stormwater infrastructures (GSI), and its media is a key factor in reducing runoff water volume and purifying water quality. Many studies have investigated media improvement to enhance the pollutant removal capacity. However, the long-term cumulative...

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Autores principales:	Zhaoxin Zhang, Jiake Li, Yajiao Li, Dongqi Wang, Jingyu Zhang, Lingzhi Zhao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Green stormwater infrastructures Bioretention systems Modified media Cumulative effect Microbial characteristic Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/d9204c7950814894aeac3a88129ffa77
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spelling	oai:doaj.org-article:d9204c7950814894aeac3a88129ffa772021-11-14T04:28:19ZAssessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media0147-651310.1016/j.ecoenv.2021.112957https://doaj.org/article/d9204c7950814894aeac3a88129ffa772021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0147651321010691https://doaj.org/toc/0147-6513Bioretention system is one of the most used green stormwater infrastructures (GSI), and its media is a key factor in reducing runoff water volume and purifying water quality. Many studies have investigated media improvement to enhance the pollutant removal capacity. However, the long-term cumulative effect and microbial effect of pollutants in the modified-media bioretention system is less known. This study investigated the cumulative effect of pollutants and their influence on microbial characteristics in conventional and modified media bioretention system. The addition of modifiers increased the background content of pollutants in the media, and the accumulation of pollutants in planting soil (PS) and bioretention soil mixing + water treatment residuals (BSM+WTR) was relatively higher after the simulated rainfall experiment. The accumulation of pollutants led to a decrease in dehydrogenase activity, and an increase in urease and invertase activities. Ten dominant bacterial species at the phylum level were found in all bioretention systems. The relative abundances of the bacteria with good viability under low nutritional conditions decreased, while the species which could live in the pollutant-rich environment increased. The accumulation of pollutants in the bioretention system led to the extinction of some functional microorganisms. The better the effects of modified media on pollutant removal showed, the more obvious effect on the media micro-ecosystem was. To ensure the long-term efficient and stable operation of the modified-media bioretention system, we recommend balancing the pollutant removal efficiency and cumulative effect in modified-media bioretention systems.Zhaoxin ZhangJiake LiYajiao LiDongqi WangJingyu ZhangLingzhi ZhaoElsevierarticleGreen stormwater infrastructuresBioretention systemsModified mediaCumulative effectMicrobial characteristicEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEcotoxicology and Environmental Safety, Vol 228, Iss , Pp 112957- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Green stormwater infrastructures Bioretention systems Modified media Cumulative effect Microbial characteristic Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	Green stormwater infrastructures Bioretention systems Modified media Cumulative effect Microbial characteristic Environmental pollution TD172-193.5 Environmental sciences GE1-350 Zhaoxin Zhang Jiake Li Yajiao Li Dongqi Wang Jingyu Zhang Lingzhi Zhao Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
description	Bioretention system is one of the most used green stormwater infrastructures (GSI), and its media is a key factor in reducing runoff water volume and purifying water quality. Many studies have investigated media improvement to enhance the pollutant removal capacity. However, the long-term cumulative effect and microbial effect of pollutants in the modified-media bioretention system is less known. This study investigated the cumulative effect of pollutants and their influence on microbial characteristics in conventional and modified media bioretention system. The addition of modifiers increased the background content of pollutants in the media, and the accumulation of pollutants in planting soil (PS) and bioretention soil mixing + water treatment residuals (BSM+WTR) was relatively higher after the simulated rainfall experiment. The accumulation of pollutants led to a decrease in dehydrogenase activity, and an increase in urease and invertase activities. Ten dominant bacterial species at the phylum level were found in all bioretention systems. The relative abundances of the bacteria with good viability under low nutritional conditions decreased, while the species which could live in the pollutant-rich environment increased. The accumulation of pollutants in the bioretention system led to the extinction of some functional microorganisms. The better the effects of modified media on pollutant removal showed, the more obvious effect on the media micro-ecosystem was. To ensure the long-term efficient and stable operation of the modified-media bioretention system, we recommend balancing the pollutant removal efficiency and cumulative effect in modified-media bioretention systems.
format	article
author	Zhaoxin Zhang Jiake Li Yajiao Li Dongqi Wang Jingyu Zhang Lingzhi Zhao
author_facet	Zhaoxin Zhang Jiake Li Yajiao Li Dongqi Wang Jingyu Zhang Lingzhi Zhao
author_sort	Zhaoxin Zhang
title	Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
title_short	Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
title_full	Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
title_fullStr	Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
title_full_unstemmed	Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
title_sort	assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/d9204c7950814894aeac3a88129ffa77
work_keys_str_mv	AT zhaoxinzhang assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia AT jiakeli assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia AT yajiaoli assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia AT dongqiwang assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia AT jingyuzhang assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia AT lingzhizhao assessmentonthecumulativeeffectofpollutantsandtheevolutionofmicroecosystemsinbioretentionsystemswithdifferentmedia
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Assessment on the cumulative effect of pollutants and the evolution of micro-ecosystems in bioretention systems with different media

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