Program Two
Wednesday, May 21, 1997

Vegetation-Based-Remediation Kansa B



A. Ferro, J. Kennedy, D. Knight, and J. Rieder, Phytokinetics, Inc., 1770 North Research Park Way, Suite 110, North Logan, UT 84341 Phytoremediation is the use of plants for the in situ cleanup of contaminated soils, sediments, and ground water. Evidence is accumulating that many types of organic chemical wastes biodegrade more rapidly in planted soils than in unplanted soils. A green-house-scale experiment evaluated phytoremediation for soils contaminated with pentachlorophenol (PCP) and polyaromatic hydrocarbons (PAHs). The following three treatment-types were included in the study: 1) nutrient-amended soil planted with perennial ryegrass (Lolium perenne); 2) unplanted soil amended with nutrients; and 3) unplanted, unamended soil.

Using conventional techniques for soil extraction and analysis, concentrations of PCP and 16 PAHs were determined at two-month intervals for eight months. Detailed results are presented for two analytes: PCP and pyrene. At the two-month sampling time, the concentrations of both analytes were significantly lower in the planted soil compared to the unplanted-amended soils. At 8 months, however, analyte concentrations were the same for the two treatments. Results obtained for other PAHs containing four aromatic rings were similar to those obtained for pyrene.

However, for PAHs containing two, and those with five aromatic rings, the planted soil treatments showed only marginal increases in biodegradation compared to the unplanted-amended soils. These results suggested that rates of biodegradation for PCP and PAHs with four aromatic rings could be accelerated by the presence of plant roots. Final extents of removal are still being evaluated.

Key words: phytoremediation, PCP, PAH, biodegradation, ryegrass

Top of Page

Return to Main Table of Contents
(to see full list of programs and abstracts)

Sub-Menu of Event Programs
(to see specific list of abstracts)

Tuesday, May 20, 1997

Metals Kansa A

Remediation of Munitions Compounds Kansa B

Analytical Methods Kansa C/D

General Topics Kansa B

Wednesday, May 21, 1997

Metals Kansa A

Zero-Valent Metals Kansa A

Remediation Kansa A

Vegetation-based Remediation Kansa B

Partnerships & Innovative Technologies Kansa C/D

Nonaqueous Phase Liquids Kansa C/D

Thursday, May 22, 1997

Biofilms & Barriers Kansa A

Bioremediation Kansa B

Partnerships & Technology Innovations Kansa C/D

Remediation Kansa C/D


Return to Publications Menu


Send comments on the Great Plains/Rocky Mountain HSRC web pages to:;
comments or questions about this WWW server, to: