2019
DOI: 10.1051/e3sconf/201911803031
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Experimental simulation of nitrogen and phosphorus release during marine dumping of dredged sediment

Abstract: Marine dumping of dredged sediment results in the release of considerable amounts of nitrogen and phosphorus into the seawater. In this study, we evaluated the release pattern of nitrogen and phosphorus during sediment dumping through experimental simulation under different mixing ratios and temperatures. The concentration of NO3-N, PO4-P, and total phosphorus (TP) in seawater quickly increased in less than 1 h after mixing of sediment and seawater and remained stable thereafter. The concentration of NH4-N inc… Show more

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Cited by 5 publications
(4 citation statements)
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“…O MPS é constituído por partículas inorgânicas (sedimento) e elementos biogênicos (matéria orgânica dissolvida e particulada) em suspensão na água. Essas partículas possuem a capacidade de inibir ou enriquecer os ecossistemas costeiros, fixar ou adsorver poluentes de metal, produtos químicos ou de origem orgânica, podendo causar eutrofização e a degradação de habitats marinhos biologicamente produtivos (Fathollahzadeh et al, 2015;Song et al, 2016;Yu et al, 2017;Liu et al, 2019;Fonseca et al, 2020). Entre outras consequências estão a elevação da turbidez, da sedimentação e a diminuição de oxigênio dissolvido na água (Cesar et al, 2014;Falcão Filho et al, 2016;Caballero et al, 2018).…”
Section: Issn:1984-2295unclassified
“…O MPS é constituído por partículas inorgânicas (sedimento) e elementos biogênicos (matéria orgânica dissolvida e particulada) em suspensão na água. Essas partículas possuem a capacidade de inibir ou enriquecer os ecossistemas costeiros, fixar ou adsorver poluentes de metal, produtos químicos ou de origem orgânica, podendo causar eutrofização e a degradação de habitats marinhos biologicamente produtivos (Fathollahzadeh et al, 2015;Song et al, 2016;Yu et al, 2017;Liu et al, 2019;Fonseca et al, 2020). Entre outras consequências estão a elevação da turbidez, da sedimentação e a diminuição de oxigênio dissolvido na água (Cesar et al, 2014;Falcão Filho et al, 2016;Caballero et al, 2018).…”
Section: Issn:1984-2295unclassified
“…Dumping them back into the lake away from the ship channels was the standard practice. However, this practice carries tremendous environmental risks because it could interrupt local ecosystems and release high levels of nutrients into the water, posing a threat to water quality (Hull & Associates Inc., 2018; W. Liu et al., 2019; Moog et al., 2018). Consequently, open‐lake disposal has been banned by Ohio Laws since July 1, 2020 (Ohio Revised Code, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…The Toledo Port, Ohio is dredged annually, and nearly 1 million tons of dredged sediments are disposed into the open waters of Lake Erie (OEPA, 2020; USACE, 2009). Open lake‐dredged sediment disposal poses a threat to the water quality by resuspending sediment, creating an immediate increase in the total suspended sediment and nutrient concentrations and lowering dissolved oxygen levels (Li et al., 2009; Liu et al., 2019; Moog et al., 2018). The total amount of N and P released to the water column can be nearly 50 kg (110 lbs.)…”
Section: Introductionmentioning
confidence: 99%
“…The total amount of N and P released to the water column can be nearly 50 kg (110 lbs.) per load from a hopper dredger having a capacity of 5,000 m 3 (6,540 yd 3 ) (Liu et al., 2019). An Ohio State Senate Bill, effective as of July 2020, prohibits the open water dumping of dredged material and recommends finding alternative beneficial uses (Gardner & Peterson, 2015).…”
Section: Introductionmentioning
confidence: 99%