Contaminated aquatic sediments

Area of Science:

• Environmental Science
• Environmental Chemistry
• Environmental Engineering

Background:

• Aquatic sediment remediation demands diverse expertise, from risk assessment to construction.
• Recent research enhances understanding of contaminant behavior and remediation strategies.

Purpose of the Study:

• To review advancements in sediment remediation assessment and technology.
• To highlight new methods for characterizing risks and managing contaminated sediments.

Main Methods:

• Optimizing passive samplers for sediment porewater chemical analysis.
• Utilizing black carbon and porewater as bioaccumulation predictors.
• Developing source identification and chemical modeling tools.
• Refining sediment capping amendments, including activated carbon.
• Establishing 16S rRNA techniques for identifying contaminant-degrading microbes.

Main Results:

• Porewater and black carbon are superior predictors of contaminant bioaccumulation compared to total organic carbon.
• Improved risk characterization at sediment sites.
• Development and application of source identification and modeling tools for metals, PAHs, and PCBs.
• Advancements in sediment capping technologies and beneficial use of dredged materials.
• Identification of microbial communities involved in natural contaminant degradation.

Conclusions:

• Sediment remediation science and technology continue to evolve with improved assessment and treatment methods.
• Natural processes like biodegradation are increasingly understood and utilized.
• Beneficial use of dredged sediment is a key focus, shifting from waste management to resource utilization.