Article
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Application of Drifted Pumice Stone as a Sand-Capping Material
Version 1
: Received: 22 January 2023 / Approved: 30 January 2023 / Online: 30 January 2023 (02:03:58 CET)
A peer-reviewed article of this Preprint also exists.
Inoue, T.; Fujita, I. Application of Drifted Pumice Stone as a Sand-Capping Material. Water 2023, 15, 942. Inoue, T.; Fujita, I. Application of Drifted Pumice Stone as a Sand-Capping Material. Water 2023, 15, 942.
Abstract
Large amounts of pumice stone generated by the submarine volcanic eruption at Fukutoku Okanoba on August 13, 2021, drifted ashore, affecting ship navigation and fishery operations. Through laboratory experiments, we investigated the possibility of using pumice as a sand-capping material for eutrophic sediments. 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% reduction in NH4-N and PO4-P release rates, respectively. Furthermore, the bivalve exposure experiments using crushed pumice suspended in seawater showed no adverse effects specific to pumice and lower bivalve mortality than that using kaolin at the same concentration. This could be owing to differences in gill accumulation and blockage owing to the particle size variation of the suspended particles. These results suggest that crushed pumice is effective for sand covering and suppresses oxygen consumption and nutrient release from the sediments.
Keywords
crushed pumice stone; sand-capping material; submarine volcano; bivalve exposure
Subject
Environmental and Earth Sciences, Environmental Science
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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