A pilot study on remediation of muddy tidal flat using porous pile

Sung-Hoon Ryu; Shinya Nakashita; In-Cheol Lee; Dong-Sun Kim; Jong-Ryol Kim; Tadashi Hibino; Tamiji Yamamoto; Satoshi Asaoka; Kyunghoi Kim

doi:10.1016/j.marpolbul.2016.11.019

A pilot study on remediation of muddy tidal flat using porous pile

Mar Pollut Bull. 2017 Jan 30;114(2):837-842. doi: 10.1016/j.marpolbul.2016.11.019. Epub 2016 Nov 13.

Authors

Sung-Hoon Ryu¹, Shinya Nakashita², In-Cheol Lee³, Dong-Sun Kim⁴, Jong-Ryol Kim⁵, Tadashi Hibino⁶, Tamiji Yamamoto⁷, Satoshi Asaoka⁸, Kyunghoi Kim⁹

Affiliations

¹ Department of Ocean Engineering, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address: firesinger@gmail.com.
² Department of Civil and Environmental Engineering, Hiroshima University, 4-1, Kagamiyama 1 chome, Higashi-Hiroshima 739-8527, Japan. Electronic address: nakashita@hiroshima-u.ac.jp.
³ Department of Ocean Engineering, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address: ilee@pknu.ac.kr.
⁴ Department of Ecological Engineering, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address: kimds@pknu.ac.kr.
⁵ Ecology & Restoration Division, Korea Fisheries Resources Agency, 19F, 79, Cengum Jungang-ro, Haeundae-Gu, Busan 48058, Republic of Korea. Electronic address: jrkim@fira.or.kr.
⁶ Department of Civil and Environmental Engineering, Hiroshima University, 4-1, Kagamiyama 1 chome, Higashi-Hiroshima 739-8527, Japan. Electronic address: hibinot@hiroshima-u.ac.jp.
⁷ Department of Biosphere Science, Hiroshima University, 4-1, Kagamiyama 1 chome, Higashi-Hiroshima 739-8527, Japan. Electronic address: tamyama@hiroshima-u.ac.jp.
⁸ Research Center for Inland Seas, Kobe University, 5-1-1 Fukaeminami, Higashinada, Kobe 658-0022, Japan. Electronic address: s-asaoka@maritime.kobe-u.ac.jp.
⁹ Department of Ocean Engineering, Pukyong National University, 45, Yongso-ro, Nam-Gu, Busan 48513, Republic of Korea. Electronic address: hoikim@pknu.ac.kr.

PMID: 27847166
DOI: 10.1016/j.marpolbul.2016.11.019

Abstract

In order to prove that porous piles are effective in remediating muddy tidal flat sediments and increasing the biomass, field experiments were carried out at the tidal flat of a brackish river located in Hiroshima City, Japan. Porous piles with a diameter of 16cm and height of 50cm were installed in the muddy sediment that covers the sand layer of the tidal flat. After installation, concentrations of dissolved oxygen in interstitial water in and around the porous piles increased to a maximum concentration of 6mg/l due to enhancement of the groundwater flow. The increase of dissolved oxygen in the interstitial water produced a decrease in the concentration of ammonia and an increase in the individual number of benthos at the porous pile site. From these results, we concluded that the porous pile is an effective technology for remediation of muddy tidal flats.

Keywords: Groundwater flow; Muddy tidal flat; Porous pile; Remediation.

MeSH terms

Environmental Restoration and Remediation / methods*
Geologic Sediments / chemistry*
Groundwater / chemistry*
Japan
Oxygen / analysis*
Pilot Projects
Porosity
Surface Properties
Water Movements*

Substances

Oxygen