Application of Drifted Pumice Stone as a Sand-Capping Material
Large amounts of pumice stone generated by the submarine volcanic eruption at Fukutoku Okanoba on 13 August 2021 drifted ashore, affecting ship navigation and fishery operations and posing challenges for disposal and a risk to benthic sea-life. As a new approach to managing ejected pumice from subma...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/5/942 |
| _version_ | 1797614230998876160 |
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| author | Tetsunori Inoue Isamu Fujita |
| author_facet | Tetsunori Inoue Isamu Fujita |
| author_sort | Tetsunori Inoue |
| collection | DOAJ |
| description | Large amounts of pumice stone generated by the submarine volcanic eruption at Fukutoku Okanoba on 13 August 2021 drifted ashore, affecting ship navigation and fishery operations and posing challenges for disposal and a risk to benthic sea-life. As a new approach to managing ejected pumice from submarine eruptions, we investigated the possibility of using pumice as a sand-capping material for eutrophic sediments through laboratory experiments. Crushed pumice as a sand cover material effectively reduced the sedimentary oxygen consumption rate. Nutrient release from sediment showed a similar trend, with ~25% and 82% reductions in NH<sub>4</sub>-N and PO<sub>4</sub>-P release rates, respectively. Furthermore, bivalve exposure experiments using crushed pumice suspended in seawater showed no adverse effects specific to pumice and lowered bivalve mortality to a greater extent than did using kaolin at the same concentration. This could be related to the differences in gill accumulation and blockage owing to the particle size variation of suspended particles. These results suggest that crushed pumice is effective for sand-capping and suitably suppresses oxygen consumption and nutrient release from sediments. |
| first_indexed | 2024-03-11T07:06:48Z |
| format | Article |
| id | doaj.art-ae5c2fed4e514dec9c0dfa3a3fb34ad1 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T07:06:48Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-ae5c2fed4e514dec9c0dfa3a3fb34ad12023-11-17T08:55:13ZengMDPI AGWater2073-44412023-03-0115594210.3390/w15050942Application of Drifted Pumice Stone as a Sand-Capping MaterialTetsunori Inoue0Isamu Fujita1Marine Environment Control System Department, Port and Airport Research Institute, 3-1-1 Nagase, Yokosuka 239-0826, JapanMarine Environment Control System Department, Port and Airport Research Institute, 3-1-1 Nagase, Yokosuka 239-0826, JapanLarge amounts of pumice stone generated by the submarine volcanic eruption at Fukutoku Okanoba on 13 August 2021 drifted ashore, affecting ship navigation and fishery operations and posing challenges for disposal and a risk to benthic sea-life. As a new approach to managing ejected pumice from submarine eruptions, we investigated the possibility of using pumice as a sand-capping material for eutrophic sediments through laboratory experiments. Crushed pumice as a sand cover material effectively reduced the sedimentary oxygen consumption rate. Nutrient release from sediment showed a similar trend, with ~25% and 82% reductions in NH<sub>4</sub>-N and PO<sub>4</sub>-P release rates, respectively. Furthermore, bivalve exposure experiments using crushed pumice suspended in seawater showed no adverse effects specific to pumice and lowered bivalve mortality to a greater extent than did using kaolin at the same concentration. This could be related to the differences in gill accumulation and blockage owing to the particle size variation of suspended particles. These results suggest that crushed pumice is effective for sand-capping and suitably suppresses oxygen consumption and nutrient release from sediments.https://www.mdpi.com/2073-4441/15/5/942crushed pumice stonesand-capping materialsubmarine volcanobivalve exposure |
| spellingShingle | Tetsunori Inoue Isamu Fujita Application of Drifted Pumice Stone as a Sand-Capping Material Water crushed pumice stone sand-capping material submarine volcano bivalve exposure |
| title | Application of Drifted Pumice Stone as a Sand-Capping Material |
| title_full | Application of Drifted Pumice Stone as a Sand-Capping Material |
| title_fullStr | Application of Drifted Pumice Stone as a Sand-Capping Material |
| title_full_unstemmed | Application of Drifted Pumice Stone as a Sand-Capping Material |
| title_short | Application of Drifted Pumice Stone as a Sand-Capping Material |
| title_sort | application of drifted pumice stone as a sand capping material |
| topic | crushed pumice stone sand-capping material submarine volcano bivalve exposure |
| url | https://www.mdpi.com/2073-4441/15/5/942 |
| work_keys_str_mv | AT tetsunoriinoue applicationofdriftedpumicestoneasasandcappingmaterial AT isamufujita applicationofdriftedpumicestoneasasandcappingmaterial |