Drinking Water Treatment Residuals as Material for In situ Capping of Metal Contaminated Sediments
Abstract
This research was developed with the aim of adding value to a readily available waste material, DWTR, by exploring the mechanisms through which different types of metals can be immobilized on this highly heterogeneous sorbent in response to changing key water/sediment of DWTR as capping material for metal-contaminated sediments. It was hypothesized: first, that metal cations would form highly stable surface complexes with DWTR through a combination of different sorption mechanisms; and second, that if used as an in situ capping substrate, DWTR would significantly reduce metal effluxes from contaminated sediments towards the water column decreasing therefore their bioavailability and toxicity. The specific objectives of this study were as follows: To determine the physicochemical and toxicity characteristics of a wide variety of DWTR and develop a screening approach for identifying DWTR suitable for introduction into US aquatic systems. To conduct laboratory studies to assess the efficacy of DWTR in immobilizing metals from aqueous solutions and controlling the release of metals from contaminated sediments into the overlying water, with a focus on how these processes are affected by changes in key water parameters. To investigate the effects of extreme environmental changes on the ability of DWTR to sorb and immobilize metals when used as in-situ capping material for contaminated sediments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2023
- Accession Number
- AD1229780
Entities
People
- Hajime K. Oyamada
- Jean-François Gaillard
- Jean-claude Bonzongo
- Jingru Wei
- Kevin Kroll
- Lang Zhou
- Nancy Denslow
- Roman Gavrilla
- Samuel M Wallace
- Tiancheng Chen
- Yulin Zheng
Organizations
- Northwestern University
- University of Florida