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Guo YY, Li T, Cao XY, Zhu MX. Effective capping of dissolved sulfide generated in Ulva prolifera-rich marine sediments by iron-rich red soil. MARINE POLLUTION BULLETIN 2024; 203:116424. [PMID: 38692004 DOI: 10.1016/j.marpolbul.2024.116424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 04/15/2024] [Accepted: 04/23/2024] [Indexed: 05/03/2024]
Abstract
Bloom-induced macroalgal enrichment on the seafloor can substantially facilitate dissolved sulfide (DS) production through sulfate reduction. The reaction of DS with sedimentary reactive iron (Fe) is the main mechanism of DS consumption, which however usually could not effectively prevent DS accumulation caused by pulsed macroalgal enrichment. Here we used incubations to investigate the performance of Fe-rich red soil for buffering of DS produced from macroalgae (Ulva prolifera)-enriched sediment. Based on our results, a combination of red soil additions (6.8 kg/m2) before and immediately after pulsed macroalgal deposition (455 g/m2) can effectively cap DS within the red soil layer. The effective DS buffering is mainly due to ample Fe-oxide surface sites available for reaction with DS. Only a small loss (4 %) of buffering capacity after 18-d incubation suggests that the red soil is capable of prolonged DS buffering in macroalgae-enriched sediments.
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Affiliation(s)
- Yang-Yang Guo
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Tie Li
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Xiao-Yan Cao
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Mao-Xu Zhu
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China.
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Woo HE, Jeong I, Kim JO, Kim YR, Lee IC, Kim K. Field experiments on chemical and biological changes of thin-layer oyster shells capping sediments in dense aquaculture area. ENVIRONMENTAL RESEARCH 2023; 237:116893. [PMID: 37586451 DOI: 10.1016/j.envres.2023.116893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/11/2023] [Accepted: 08/13/2023] [Indexed: 08/18/2023]
Abstract
Thin-layer oyster shell capping has been proposed as a method for improving contaminated coastal environments. Field experiments were conducted to investigate the effects of oyster shell capping on nutrient concentrations, microorganisms, and macrobenthic communities. The concentration of PO4-Pin the experimental area decreased by approximately 38% more than in the control, due to phosphorus fixation of oyster shells and the presence of Proteobacteria. Ammonia-oxidizing bacteria such as the order Pirellulales (phylum Planctomycetes) were related to the low ratio of NH3-N found in dissolved inorganic nitrogen in the experimental area, indicating nitrification promotion. The reduction in annular benthic organisms observed in the experimental area indicates a decline in sediment organic matter, which could potentially mitigate eutrophication. Oyster shell capping was confirmed to be an effective material for restoring coastal sediments by improving their chemical and biological properties.
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Affiliation(s)
- Hee-Eun Woo
- Research Center for Ocean Industrial Development, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea
| | - Ilwon Jeong
- Research Center for Ocean Industrial Development, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea
| | - Jong-Oh Kim
- Department of Microbiology, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea; School of Marine and Fisheries Life Science, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea
| | - Young-Ryun Kim
- Marine Eco-Technology Institute, 406 Sinseon-ro, Nam-Gu, Busan, 48520, Republic of Korea
| | - In-Cheol Lee
- Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea
| | - Kyunghoi Kim
- Department of Ocean Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513, Republic of Korea; Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Kota Surabaya, 60115, Indonesia.
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Asaoka S, Ishidu T, Nakamoto K. Effect of chemical composition of coal ash used to prepare granulated coal ash on the removal of hydrogen sulfide from water. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2023; 95:e10916. [PMID: 37533124 DOI: 10.1002/wer.10916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 07/24/2023] [Accepted: 07/29/2023] [Indexed: 08/04/2023]
Abstract
Granulated coal ash was prepared by mixing coal ash derived from a coal electric power plant and blast furnace cement, to remove hydrogen sulfide from aquatic environment. In this study, we investigate the effects of the composition of the coal ash used to prepare the granulated coal ash on its hydrogen sulfide removal performance. Manganese, magnesium, and calcium contents in the granulated coal ash were found to be the major factors in controlling the rate of hydrogen sulfide removal. The kinetics of hydrogen sulfide removal by the granulated coal ash were expressed as a first-order equation with a rate constant of 0.0081-0.080 h-1 . The rate constant for hydrogen sulfide removal obtained in this study correlated well with the manganese content in the granulated coal ash. The increasing surface pH attributed to the hydrolysis of calcium and magnesium on the surface of the granulated coal ash slightly increased the hydrogen sulfide removal rate. PRACTITIONER POINTS: Adsorbents for H2 S are prepared by coal ash from different coal blend and coal electric power generation processes. Adsorbents tested in this study could remove hydrogen sulfide effectively. Manganese oxide in the adsorbents enhanced the removal rate of hydrogen sulfide. Adsorbents tested in this study contribute to sustainable development goals in terms of coal fly ash recycling.
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Affiliation(s)
- Satoshi Asaoka
- Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, Japan
- Research Center for Inland Seas, Kobe University, Kobe, Japan
| | - Takamichi Ishidu
- Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
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Jeong I, Kim K. Evaluation of compressive strength and phosphate fixation characteristics of wastewater filter media using coal bottom ash and oyster shells. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 341:118057. [PMID: 37150164 DOI: 10.1016/j.jenvman.2023.118057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/20/2023] [Accepted: 04/27/2023] [Indexed: 05/09/2023]
Abstract
The excessive concentration of phosphate in coastal areas results in environmental problems such as red tide and eutrophication. Filter media (FM) is used in wastewater treatment facilities to decrease phosphate concentration. This study aims to investigate the optimal mixing ratio for high compressive strength and phosphate fixation ability using coal bottom ash (CBA) and oyster shells (OS) -derived FM. Compressive strength experiments were conducted using mixed CBA and OS with different mixing ratios, 1:3 (GBO13), 1:1 (GBO11), and 3:1 (GBO31). The highest compressive strength of 0.93 MPa was observed in GBO11. GBO11 had similar elemental proportions with Portland cement, promoting a pozzolanic reaction and forming calcium-silicate-hydrate. The phosphate fixation capability of GBO11 was evaluated through an up-flow column filtration experiment. GBO11 fixed phosphate through precipitation and adsorption, and the maximum amount of phosphate fixation was estimated to be 1.403 mg-P/g. This study demonstrates that the combination of CBA and OS can be promising FM with high compressive strength and phosphate fixation properties.
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Affiliation(s)
- Ilwon Jeong
- Research Center for Ocean Industrial Development, Department of Ocean Engineering, Pukyong National University, Busan, 48513, South Korea.
| | - Kyunghoi Kim
- Department of Ocean Engineering, Pukyong National University, Busan, 48513, South Korea; Department of Biology, Faculty of Science and Technology, Universitas Airlangga, Surabaya, 60115, Indonesia.
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Yuan T, Hashimoto K, Tazaki A, Hasegawa M, Kurniasari F, Ohta C, Aoki M, Ohgami N, Kato M. Potential application of a hydrotalcite-like compound for reduction of toxicity to aquatic organisms via rapid and efficient removal of hydrogen sulfide. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 321:115861. [PMID: 36050136 DOI: 10.1016/j.jenvman.2022.115861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/20/2022] [Accepted: 07/23/2022] [Indexed: 06/15/2023]
Abstract
Hydrogen sulfide (H2S) is known to have wide ranging toxicities not only as a gas but also as dissolved forms in aquatic environments. The diversity of aquatic organisms can be severely affected by hydrogen sulfide at very low concentrations, indicating the urgent necessity to develop an efficient method for removal of hydrogen sulfide in water. In this study, the removal capacity for hydrogen sulfide of our originally developed hydrotalcite-like compound composed of magnesium and iron (MF-HT) was investigated and its potential application for reduction of toxicity to aquatic organisms was evaluated. The MF-HT experimentally showed a high adsorption capacity of 146.5 mg/g with a fast adsorption equilibrium time of 45 min, both of which are top-class compared with those of other adsorbents previously reported. In fact, removal of hydrogen sulfide (1.2-152.5 mg/L) at an average rate of >97.6% was achieved in groundwater samples (n = 16) by the MF-HT within 60 min. The toxicities of groundwater, indicated by inhibition rate for microalgae (primary producers) and immobilization rate for crustaceans (secondary consumers), were reduced by 96.1% and 82.5% in 2-fold and 4-fold diluted groundwater, respectively, after treatment with the MF-HT for 60 min. These results indicate that MF-HT has an excellent safety record for aquatic organisms. After clarifying the adsorption mechanism, excellent reusability of MF-HT was also confirmed after regeneration using 1 M Na2CO3 solution. Considering the efficacy, speed, safety and cost of MF-HT, it could be a novel promising material for solving the problem of hydrogen sulfide pollution in the hydrosphere.
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Affiliation(s)
- Tian Yuan
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan
| | - Kazunori Hashimoto
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Department of Molecular Biology, Faculty of Pharmacy, Meijo University, Nagoya, Aichi, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan
| | - Akira Tazaki
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan
| | - Masahiro Hasegawa
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Fitri Kurniasari
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan
| | - Chihiro Ohta
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan
| | - Masayo Aoki
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan
| | - Nobutaka Ohgami
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan
| | - Masashi Kato
- Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, Aichi, 466-8550, Japan; Voluntary Body for International Healthcare in Universities, Nagoya, Aichi, Japan.
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Experimental Study on the Incipient Movement of Muddy Clay under Different Salinity Conditions. ScientificWorldJournal 2022; 2022:5245928. [PMID: 36105736 PMCID: PMC9467802 DOI: 10.1155/2022/5245928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 07/01/2022] [Indexed: 11/17/2022] Open
Abstract
In order to understand the incipient movement of muddy clay under different salinity conditions, three series of flume tests were performed on incipient movement of muddy clay, including tests on incipient movement of salt-free clay mud under salt water conditions (salt water-salt-free clay mud), incipient movement of salt clay mud under salt water conditions (salt water-salt clay mud), and incipient movement of salt clay mud under freshwater conditions (freshwater-salt clay mud), using a circulating flume, in which the salinity of the water body or cohesive sediment varies from 0 to 40%. Based on the particle image velocimetry system and digital image gray processing technology, the gray curves of water near the clay mud bed surface with the velocity were plotted to quantitatively differentiate the incipient velocity of the sediment for each test. The experimental results showed that the higher the salinity of the water body or cohesive sediments is, the more difficult it is to start moving. There is a logarithmic relationship between the incipient velocity of cohesive sediments and the salinity of the water or cohesive sediments. The incipient velocity increases sharply at a salinity of 0∼10% and slowly at a salinity of 10∼40%. At the same salinity, the incipient velocity of salt clay mud under freshwater conditions is the largest, followed by that of salt clay mud under salt water conditions, while that of salt-free clay mud under salt water conditions is the smallest. In addition, the flow turbulence characteristics were analyzed under the critical conditions of the onset of muddy clay. Ultimately, an empirical formula to calculate the critical incipient velocity of muddy clay is proposed by introducing the salinity. In this study, salinity is included as a reference variable, which expands the research scope of sediment initiation and provides a reference for the study of estuary dynamics.
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