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Use of ecological concrete for nutrient removal in coastal sediment and its effects on sediment microbial communities.

Abstract：

:Ecological concrete (eco-concrete) can reduce excess nutrients (nitrogen and phosphorus) in water, but its effectiveness in removing nutrients in marine coastal sediments and the response of sediment microbial communities to its use are largely unknown. In this study, eco-concrete planted with Bruguiera gymnorrhiza was used to remove nutrients in marine coastal sediment. We found that the mean removal efficiencies of sediment total nitrogen and total phosphorus by using planted eco-concrete were 11.50% and 30.31% on day 60, and were higher than those obtained by only using B. gymnorrhiza (7.14% and 7.36%). the Diatoms and bacterial genera Fusibacter and Anoxynatronum (which belong to Firmicutes) increased and became the abundant microbes by day 60 when using planted eco-concrete, indicating their potential roles in nutrient removal. Moreover, the eco-concrete did not endanger the core microbes in sediment suggesting its environment-friendly character. Our results suggest a potential method to control marine coastal eutrophication.

journal_name

Mar Pollut Bull

journal_title

Marine pollution bulletin

authors

Liu L,Ji J,Guo Y,Chen J

doi

10.1016/j.marpolbul.2020.111911

subject

Has Abstract

pub_date

2020-12-15 00:00:00

pages

111911

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(20)31029-8

journal_volume

162

pub_type

杂志文章

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