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ID 25952
file
creator
Goto, Ikue
Kawaguchi, Osamu
Minagawa, Kazuaki
Ariyoshi, Eiji
Matsuda, Osamu
subject
Benthic microalgae
Hiroshima Bay
Nitzschia
Remediation
Sediment
NDC
Construction. Civil engineering
abstract
We examined whether replantation of benthic microalgae (BMA) can remediate shallow organically enriched sediment. Nitzschia sp., the dominant species in the tested area (Hiroshima Bay, Japan), was isolated and mass cultured, then replanted in the same area. Changes in the condition of the sediment were monitored for five months. During the study period, we observed an increase in redox potential (ORP) and a decrease in acid-volatile sulfide (AVS) in the experimental area, indicating that the sediment condition changed from reduced to oxic. Organic matter in the sediment, represented by chemical oxygen demand (COD), ignition loss (IL) and organic nitrogen (ON), decreased significantly, while inorganic nutrients (ammonia and phosphate) increased in the interstitial water. These changes imply that oxygen produced by the replanted BMA may have enhanced aerobic bacterial activity, accelerating the decomposition of organic matter. Thus, replantation of BMA shows potential as a novel and promising "phytoremediation" method for organically enriched sediment.
journal title
Marine Pollution Bulletin
volume
Volume 57
issue
Issue 1-5
start page
108
end page
115
date of issued
2008
publisher
Pergamon
Elsevier Science Ltd.
issn
0025-326X
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2007 Elsevier Ltd
relation url
department
Graduate School of Biosphere Science



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