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Title: SEQUESTERING AGENTS FOR ACTIVE CAPS - REMEDIATION OF METALS AND ORGANICS

Abstract

This research evaluated organoclays, zeolites, phosphates, and a biopolymer as sequestering agents for inorganic and organic contaminants. Batch experiments were conducted to identify amendments and mixtures of amendments for metal and organic contaminants removal and retention. Contaminant removal was evaluated by calculating partitioning coefficients. Metal retention was evaluated by desorption studies in which residue from the removal studies was extracted with 1 M MgCl{sub 2} solution. The results indicated that phosphate amendments, some organoclays, and the biopolymer, chitosan, were very effective sequestering agents for metals in fresh and salt water. Organoclays were very effective sorbents for phenanthrene, pyrene, and benzo(a)pyrene. Partitioning coefficients for the organoclays were 3000-3500 ml g{sup -1} for benzo(a)pyrene, 400-450 ml g{sup -1} for pyrene, and 50-70 ml g{sup -1} for phenanthrene. Remediation of sites with a mixture of contaminants is more difficult than sites with a single contaminant because metals and organic contaminants have different fate and transport mechanisms in sediment and water. Mixtures of amendments (e.g., organoclay and rock phosphate) have high potential for remediating both organic and inorganic contaminants under a broad range of environmental conditions, and have promise as components in active caps for sediment remediation.

Authors:
; ; ; ;
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
903407
Report Number(s):
WSRC-STI-2007-00256
Journal ID: ISSN 1532-0383; TRN: US200720%%253
DOE Contract Number:  
DE-AC09-96SR18500
Resource Type:
Journal Article
Resource Relation:
Journal Name: Soil and Sediment Contamination
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; MATERIALS TESTING; CLAYS; ZEOLITES; PHOSPHATES; ORGANIC POLYMERS; ADSORBENTS; REMEDIAL ACTION; METALS; DESORPTION; PHENANTHRENE; PYRENE; BENZOPYRENE

Citation Formats

Knox, A, Michael Paller, M, Danny D. Reible, D, Xingmao Ma, X, and Ioana G. Petrisor, I. SEQUESTERING AGENTS FOR ACTIVE CAPS - REMEDIATION OF METALS AND ORGANICS. United States: N. p., 2007. Web.
Knox, A, Michael Paller, M, Danny D. Reible, D, Xingmao Ma, X, & Ioana G. Petrisor, I. SEQUESTERING AGENTS FOR ACTIVE CAPS - REMEDIATION OF METALS AND ORGANICS. United States.
Knox, A, Michael Paller, M, Danny D. Reible, D, Xingmao Ma, X, and Ioana G. Petrisor, I. Thu . "SEQUESTERING AGENTS FOR ACTIVE CAPS - REMEDIATION OF METALS AND ORGANICS". United States. doi:. https://www.osti.gov/servlets/purl/903407.
@article{osti_903407,
title = {SEQUESTERING AGENTS FOR ACTIVE CAPS - REMEDIATION OF METALS AND ORGANICS},
author = {Knox, A and Michael Paller, M and Danny D. Reible, D and Xingmao Ma, X and Ioana G. Petrisor, I},
abstractNote = {This research evaluated organoclays, zeolites, phosphates, and a biopolymer as sequestering agents for inorganic and organic contaminants. Batch experiments were conducted to identify amendments and mixtures of amendments for metal and organic contaminants removal and retention. Contaminant removal was evaluated by calculating partitioning coefficients. Metal retention was evaluated by desorption studies in which residue from the removal studies was extracted with 1 M MgCl{sub 2} solution. The results indicated that phosphate amendments, some organoclays, and the biopolymer, chitosan, were very effective sequestering agents for metals in fresh and salt water. Organoclays were very effective sorbents for phenanthrene, pyrene, and benzo(a)pyrene. Partitioning coefficients for the organoclays were 3000-3500 ml g{sup -1} for benzo(a)pyrene, 400-450 ml g{sup -1} for pyrene, and 50-70 ml g{sup -1} for phenanthrene. Remediation of sites with a mixture of contaminants is more difficult than sites with a single contaminant because metals and organic contaminants have different fate and transport mechanisms in sediment and water. Mixtures of amendments (e.g., organoclay and rock phosphate) have high potential for remediating both organic and inorganic contaminants under a broad range of environmental conditions, and have promise as components in active caps for sediment remediation.},
doi = {},
journal = {Soil and Sediment Contamination},
number = ,
volume = ,
place = {United States},
year = {Thu May 10 00:00:00 EDT 2007},
month = {Thu May 10 00:00:00 EDT 2007}
}