Sequestering agents for active caps - Remediation of metals and organics

Anna Sophia Knox, Michael H Paller, Danny D. Reible, Xingmao Ma, Ioana G. Petrisor

Research output: Contribution to journalArticle

37 Citations (Scopus)

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 contaminant 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 MgCl2 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 L g-1 for benzo(a)pyrene, 400-450 L g-1 for pyrene, and 50-70 L g-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.

Original languageEnglish (US)
Pages (from-to)516-532
Number of pages17
JournalSoil and Sediment Contamination
Volume17
Issue number5
DOIs
StatePublished - Sep 1 2008

Fingerprint

Sequestering Agents
remediation
Remediation
organoclay
Organoclay
Metals
metals
Impurities
Pyrene
Biopolymers
phenanthrene
pyrene (hydrocarbon)
pollutant
Benzo(a)pyrene
metal
pyrene
Phosphates
biopolymers
phosphates
zeolites

Keywords

  • Active caps
  • Biopolymer
  • Contaminants
  • Organoclay
  • Rock phosphate
  • Sediments
  • Zeolite

ASJC Scopus subject areas

  • Environmental Chemistry
  • Soil Science
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Knox, A. S., Paller, M. H., Reible, D. D., Ma, X., & Petrisor, I. G. (2008). Sequestering agents for active caps - Remediation of metals and organics. Soil and Sediment Contamination, 17(5), 516-532. https://doi.org/10.1080/15320380802306610

Sequestering agents for active caps - Remediation of metals and organics. / Knox, Anna Sophia; Paller, Michael H; Reible, Danny D.; Ma, Xingmao; Petrisor, Ioana G.

In: Soil and Sediment Contamination, Vol. 17, No. 5, 01.09.2008, p. 516-532.

Research output: Contribution to journalArticle

Knox, AS, Paller, MH, Reible, DD, Ma, X & Petrisor, IG 2008, 'Sequestering agents for active caps - Remediation of metals and organics', Soil and Sediment Contamination, vol. 17, no. 5, pp. 516-532. https://doi.org/10.1080/15320380802306610
Knox, Anna Sophia ; Paller, Michael H ; Reible, Danny D. ; Ma, Xingmao ; Petrisor, Ioana G. / Sequestering agents for active caps - Remediation of metals and organics. In: Soil and Sediment Contamination. 2008 ; Vol. 17, No. 5. pp. 516-532.
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