Title
Design of a solvent extraction process for PAH-contaminated sediments: The WAU-acetone process
Author
Rulkens, W.H.
Bruning, H.
van Hasselt, H.J.
Rienks, J.
van Veen, H.J.
Terlingen, J.P.M.
Centraal Instituut voor Voedingsonderzoek TNO
Contributor
Calmano, W. (editor)
Roeters, P. (editor)
Vellinga, T. (editor)
Publication year
1998
Abstract
Solvent extraction is one of the possibilities to clean-up polluted sediments. It is especially attractive when the sediment mainly consists of clay particles polluted with contaminants which are not, or not easily, biodegradable. Using acetone as extracting agent the extraction process has been investigated at laboratory scale for treating sediment of the Petroleum Harbour in Amsterdam. This sediment is characterised by a substantial percentage of particles with diameter < 63 μm, a high percentage of organic matter (about 12% on dry matter basis), a high concentration of PAH (500-2000 mg total EPA-PAH per kg dry matter) and a high concentration of mineral oil (6000-10,000 mg/kg dry matter). Based on the laboratory scale experiments a process design has been made of a complete solvent-extraction process with acetone. The main process steps in this design consist of a countercurrent flow extractor, a separator for the sediment, a post-treatment step to remove residual acetone from the sediment, a distillation column to recover the acetone for reuse and to concentrate the pollutants and a polishing step for the water to be discharged. The sediment treatment costs with this system are estimated at 115 NGL per tonne dry matter to be treated.
Subject
Nutrition
Acetone
Clean-up
PAH
Sediment
Solvent extraction
Treatment costs
Acetone
Aromatic hydrocarbons
Contamination
Cost accounting
Design
Solvent extraction
Polluted sediments
Sediments
Acetone
Mineral oil
Organic matter
Petroleum
Polycyclic aromatic hydrocarbon
Solvent
Biodegradability
Hydrocarbon
Polluted sediment
Remediation
Solvent extraction
Biodegradability
Contaminated sediment
Polycyclic aromatic hydrocarbon
Remediation
Conference paper
Extraction
Netherlands
Particle size
Pollution control
Sediment
Water pollution
To reference this document use:
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DOI
https://doi.org/10.1016/s0273-1223(98)00225-x
TNO identifier
234303
Publisher
Elsevier Sci Ltd, Exeter, United Kingdom
ISSN
0273-1223
Source
Proceedings of the 1997 2nd IAWQ Specialist Group Conference on Contaminated Sediments, 7 September 1997 through 11 September 1997, Rotterdam, Neth, Conference code: 49189, 37 (6-7), 411-418
Series
Water Science and Technology
Document type
conference paper