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Article

Application of Activated Seashells and Sand Armor for Disrupting N and P Release from River Sediments

1
Department of Chemical Engineering, Hankyong National University, Anseong 17579, Korea
2
Department of Integrated System Engineering, Hankyong National University, Anseong 17579, Korea
3
Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Korea
4
Department of Bioresources and Rural System Engineering, Hankyong National University, Anseong 17579, Korea
5
Institute of Agricultural Environmental Sciences, Hankyong National University, Anseong 17579, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Zeng-Yei Hseu
Water 2022, 14(18), 2875; https://doi.org/10.3390/w14182875
Received: 20 July 2022 / Revised: 7 September 2022 / Accepted: 9 September 2022 / Published: 15 September 2022
(This article belongs to the Special Issue Agricultural Environment and Water Technology)
We investigated the applicability of oyster (OS) and mussel shells (MS) as capping materials to inhibit the movement of nitrogen (N) and phosphorus (P) from river sediments. OS and MS are difficult to dispose of as waste, and have been used environmentally to clean up sediments contaminated with nitrogen and phosphorus. OS and MS increased the nutrient adsorption efficiency through simple heat treatment. The effectiveness of OS and MS capping with sand armor (SA) was evaluated in laboratory incubation experiments for 63 d. The sediments were capped with an active capping material (OS or MS) and then with either 1 cm or 3 cm SA. The pH and EC values were remarkably high under MS capping conditions because Ca2+ and Mg2+ were eluted from the MS material. The elution of Ca2+ and Mg2+ negatively affected the inhibition of NH4-N release by MS capping. OS capping demonstrated better performance for blocking the release of NH4-N and T-N than that of MS capping; the efficiency was enhanced by adding a 3 cm SA layer on top of the MS layer. In contrast, the PO4-P and T-P releases from the river sediments were effectively impeded by MS capping. OS capping with a 3 cm SA layer (OS/SA3) was recommended as the best capping strategy for inhibiting N and P releases from river sediments. The capping efficiencies of OS/SA3 for NH4-N, T-N, PO4-P, and T-P were 92.2%, 51.4%, 101.3%, and 93.3%, respectively. View Full-Text
Keywords: sediment; phosphorus; nitrogen; oyster shell; mussel shell; capping sediment; phosphorus; nitrogen; oyster shell; mussel shell; capping
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MDPI and ACS Style

Quansah, J.O.; Hong, S.-H.; Lee, C.-G.; Park, S.-J. Application of Activated Seashells and Sand Armor for Disrupting N and P Release from River Sediments. Water 2022, 14, 2875. https://doi.org/10.3390/w14182875

AMA Style

Quansah JO, Hong S-H, Lee C-G, Park S-J. Application of Activated Seashells and Sand Armor for Disrupting N and P Release from River Sediments. Water. 2022; 14(18):2875. https://doi.org/10.3390/w14182875

Chicago/Turabian Style

Quansah, Jude Ofei, Seung-Hee Hong, Chang-Gu Lee, and Seong-Jik Park. 2022. "Application of Activated Seashells and Sand Armor for Disrupting N and P Release from River Sediments" Water 14, no. 18: 2875. https://doi.org/10.3390/w14182875

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