Measurement and Modeling of Ecosystem Risk and Recovery for In Situ Treatment of Contaminated Sediments
Abstract
The main goal of this project is to improve the mechanistic understanding and ecological implications of the in-situ remediation technology that uses activated carbon (AC) to treat sediments contaminated by hydrophobic organic contaminants, and thereby advance the technology towards greater implementation. The results from long-term monitoring of field-scale AC amendment to sediment confirmed the progressive benefits achieved by AC over time, which was anticipated to occur according to the PCB mass transfer model. The PCB mass transfer model was further advanced considering various field conditions and engineering options and equipped with robust model parameters determined from independent tests. The PCB mass transfer model successfully reproduced the experimental results observed in 24-month column studies. The results advance engineering design and predictive performance of the in-situ AC treatment. Adverse effects of AC amendment were not observed on the Neanthes survival regardless of the sediment type, the AC dose (20% versus 5%) or the AC particle size. Without additional food supply, no significant differences on growth were observed. When feeding on fish food, there were some effects of AC on these deposit feeders, but absolute effects of AC amendments on growth and energy reserves were not significant.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2013
- Accession Number
- ADA606831
Entities
People
- David Werner
- Elisabeth M. Janssen
- Richard G Luthy
- Yeo-myoung Cho
- Yongju Choi
Organizations
- Stanford University