Assessing the Efficacy of a Sediment Remediation Program Using Benthic and Pelagic Copepod Bioassays

AbstractMarine pollution is becoming more and more serious, especially in coastal areas. Because of the sequestration and consequent accumulation of pollutants in sediments (mainly organic compounds and heavy metals), marine environment restoration cannot exempt from effective remediation of sediments themselves. It has been well proven that, after entering into the seawater, these pollutants are biotransformed into their metabolites, which may be more toxic than their parent molecules. Based on their bioavailability and toxic nature, these compounds may accumulate into the living cells of marine organisms. Pollutants bioaccumulation and biomagnification along the marine food chain lead to seafood contamination and human health hazards. Nowadays, different technologies are available for sediment remediation, such as physicochemical, biological, and bioelectrochemical processes. This paper gives an overview of the most recent techniques for marine sediment remediation while presenting sediment-based microbial fuel cells (SMFCs). We discuss the issues, the progress, and future perspectives of SMFC application to the removal of hydrocarbons and metals in the marine environment with concurrent energy production. We give an insight into the possible mechanisms leading to sediment remediation, SMFC energy balance, and future exploitation.

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Reducing arsenic toxicity using the interfacial oxygen nanobubble technology for sediment remediation

Water Research ◽

10.1016/j.watres.2021.117657 ◽

2021 ◽

Vol 205 ◽

pp. 117657 ◽

Cited By ~ 1

Author(s):

Ying Tang ◽

Meiyi Zhang ◽

Jing Zhang ◽

Tao Lyu ◽

Mick Cooper ◽

...

Keyword(s):

Arsenic Toxicity ◽

Sediment Remediation ◽

Interfacial Oxygen

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Sediment Remediation for Ecosystem in Eutrophic Lakes

The Scientific World JOURNAL ◽

10.1100/tsw.2002.156 ◽

2002 ◽

Vol 2 ◽

pp. 885-891 ◽

Cited By ~ 9

Author(s):

Y. Amano ◽

K. Taki ◽

K. Murakami ◽

T. Ishii ◽

H. Matsushima

Keyword(s):

Water Quality ◽

Green Algae ◽

Hybrid System ◽

Size Reduction ◽

Control Effect ◽

Sediment Remediation ◽

Eutrophic Lakes

The remediation method — namely, a hybrid system combined with DAF and CRM — is studied in this paper for the size reduction of aqua-ecological circulation and for the elution control in lakes. Results show that two effects on water quality purification, the sediment washout effect and the elution control effect, can be induced by this system, and the biota inhabiting the lake is therefore shifted into an oligotrophic aspect, from blue algae to green algae and/or diatoms.

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Oxygenation of anoxic sediments triggers hatching of zooplankton eggs

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2015.2025 ◽

2015 ◽

Vol 282 (1817) ◽

pp. 20152025 ◽

Cited By ~ 14

Author(s):

Elias Broman ◽

Martin Brüsin ◽

Mark Dopson ◽

Samuel Hylander

Keyword(s):

Sediment Surface ◽

Substantial Part ◽

System Modelling ◽

Anoxic Sediments ◽

Overlying Water ◽

Pelagic Copepod ◽

Coastal Marine ◽

Copepod Population ◽

Benthic Pelagic Coupling ◽

Dormant Eggs

Many coastal marine systems have extensive areas with anoxic sediments and it is not well known how these conditions affect the benthic–pelagic coupling. Zooplankton lay their eggs in the pelagic zone, and some sink and lie dormant in the sediment, before hatched zooplankton return to the water column. In this study, we investigated how oxygenation of long-term anoxic sediments affects the hatching frequency of dormant zooplankton eggs. Anoxic sediments from the brackish Baltic Sea were sampled and incubated for 26 days with constant aeration whereby, the sediment surface and the overlying water were turned oxic. Newly hatched rotifers and copepod nauplii (juveniles) were observed after 5 and 8 days, respectively. Approximately 1.5 × 10 5 nauplii m −2 emerged from sediment turned oxic compared with 0.02 × 10 5 m −2 from controls maintained anoxic. This study demonstrated that re-oxygenation of anoxic sediments activated a large pool of buried zooplankton eggs, strengthening the benthic–pelagic coupling of the system. Modelling of the studied anoxic zone suggested that a substantial part of the pelagic copepod population can derive from hatching of dormant eggs. We suggest that this process should be included in future studies to understand population dynamics and carbon flows in marine pelagic systems.

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ON MODELING THE GROWTH DYNAMICS OF A STAGE STRUCTURED POPULATION

International Journal of Biomathematics ◽

10.1142/s1793524513500393 ◽

2013 ◽

Vol 06 (06) ◽

pp. 1350039 ◽

Cited By ~ 2

Author(s):

GIUSEPPE BUFFONI ◽

SARA PASQUALI

Keyword(s):

Numerical Simulations ◽

Temporal Dynamics ◽

Growth Dynamics ◽

Biological Processes ◽

Dispersion Models ◽

Development Models ◽

Regression Effects ◽

Pelagic Copepod ◽

Structured Population ◽

Lagrangian Modeling

A Lagrangian modeling approach is applied to the numerical simulation of the temporal dynamics of a stage-structured population. The growth dynamics is determined only by the main biological processes: development of an individual, mortality, reproduction. Different approaches in modeling the development process of an individual are implemented: stochastic advection-diffusion models (backward–forward dispersion models), and stochastic development models where regression effects, defined as negative development on the status of an individual, are forbidden (forward dispersion models). Some properties of the residence times of an individual in a stage are investigated: in particular, their role in the calibration of the development models and in the estimation of some parameters introduced in the model equation. As a study case a multi-stage pelagic copepod population is considered. Trying to separate the effects of the main biological processes on the temporal dynamics, numerical simulations have been carried out in some idealized situations: first only the development of the individuals, neglecting mortality and reproduction, is considered; then the mortality process is introduced, and finally both the mortality and reproduction processes. The results of the numerical simulations, are compared and discussed.

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Intergenerational effects of resuspended sediment and trace metal mixtures on life cycle traits of a pelagic copepod

Environmental Pollution ◽

10.1016/j.envpol.2020.115460 ◽

2020 ◽

Vol 267 ◽

pp. 115460

Author(s):

Shagnika Das ◽

Baghdad Ouddane ◽

Jiang-Shiou Hwang ◽

Sami Souissi

Keyword(s):

Life Cycle ◽

Trace Metal ◽

Intergenerational Effects ◽

Metal Mixtures ◽

Pelagic Copepod

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A comparative analysis of practitioners' experience in sediment remediation projects to highlight best practices

Water Quality Research Journal ◽

10.2166/wqrj.2018.020 ◽

2018 ◽

Vol 54 (1) ◽

pp. 10-33 ◽

Cited By ~ 2

Author(s):

Zobia Jawed ◽

Gail Krantzberg

Keyword(s):

Technology Development ◽

Political Support ◽

Contaminated Site ◽

Consensus Building ◽

Contaminated Sediment ◽

Sediment Remediation ◽

Social Challenges ◽

Polycyclic Aromatic ◽

Stakeholder Consensus ◽

Depth Interviews

Abstract The Randle Reef contaminated site, located in the southwest corner of Hamilton Harbour, is approximately 60 hectares in size. This site contains approximately 695,000 m3 of sediment contaminated with polycyclic aromatic hydrocarbons (PAHs) and metals. The complex Randle Reef sediment remediation project is finally coming to fruition after more than 30 years of study, discussion, collaborations, stakeholder consensus-building, and debate. This paper unravels the reasons behind the delays associated with implementing sediment management at the Randle Reef site. In-depth interviews with experts and professionals from organizations who are/were involved in the project were conducted to identify the nature of performance in five theme areas that are important for successful action namely: (1) participation of appropriate actors with common objectives; (2) funding and resources; (3) decision-making process; (4) research and technology development; and (5) public and political support. It is evident from this study that the hurdles to progress with addressing contaminated sediment sites involve technical, political, regulatory as well as social challenges. We offer potential solutions and a series of recommendations based on experts' first-hand experience with the management of such complex sites to inform how future remediation projects can overcome obstacles. This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).

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