Phytoremediation of BTEX contaminated soil by Canna×generalis.

A Boonsaner
A Boonsaner
Silpakorn University

Ecotoxicol Environ Saf 2011 Sep 16;74(6):1700-7. Epub 2011 Apr 16.

Department of Environmental Science, Faculty of Science, Silpakorn University, Nakhon Pathom 73000, Thailand.

Bioaccumulation experiments showed that the canna (Canna×generalis) could accumulate BTEX (benzene, toluene, ethylbenzene and xylenes) from root zone and rhizome zone soil and translocate these compounds to the shoot. A comparison among these compounds showed that the sequences for accumulation in the root, rhizome and shoot were strongly related to their physicochemical properties (i.e. K(ow) values and molecular weight). For removal efficiency, the canna could remove about 80% of BTEX in the root zone and rhizome zone soil in 21 days. In addition, the removal efficiency in BTEX contaminated soil with 40% water content was a little higher than that found with 20% soil water content. This result indicated that the soil water content should also be considered when phytoremediation is employed.

Download full-text PDF

Source Listing
September 2011
55 Reads

Publication Analysis

Top Keywords

water content
zone rhizome
zone soil
soil water
rhizome zone
root zone
contaminated soil
removal efficiency
btex contaminated
kow values
molecular weight
efficiency canna
weight removal
values molecular
properties kow
sequences accumulation
compounds sequences
accumulation root
root rhizome

Similar Publications

Microbial degradation of benzene, toluene, ethylbenzene and xylene isomers (BTEX) contaminated groundwater in Korea.

Water Sci Technol 2001 ;44(7):165-71

Department of Environmental Engineering, Kyonggi University, Suwon City, Korea.

A mixed culture derived from a gasoline-contaminated aquifer in Korea was enriched on toluene at 25 degrees C. A study was conducted to characterize the substrate interaction of BTEX by toluene-enriched consortia and determine the effects of initial BTEX concentration on BTEX degradation. Substrate degradation patterns in individual aromatics were found to differ significantly from patterns for aromatics in mixtures. Read More

View Article
March 2002

Temperature effects and substrate interactions during the aerobic biotransformation of BTEX mixtures by toluene-enriched consortia and Rhodococcus rhodochrous.

Biotechnol Bioeng 1999 Mar;62(5):526-36

Department of Civil and Environmental Engineering, 631 Davis Hall, MC 1710 University of California at Berkeley, Berkeley, California 94720-1710, USA.

A microbial consortium derived from a gasoline-contaminated aquifer was enriched on toluene (T) in a chemostat at 20 degrees C and was found to degrade benzene (B), ethylbenzene (E), and xylenes (X). Studies conducted to determine the optimal temperature for microbial activity revealed that cell growth and toluene degradation were maximized at 35 degrees C. A consortium enriched at 35 degrees C exhibited increased degradation rates of benzene, toluene, ethylbenzene, and xylenes in single-substrate experiments; in BTEX mixtures, enhanced benzene, toluene, and xylene degradation rates were observed, but ethylbenzene degradation rates decreased. Read More

View Article
March 1999

Plants as bio-indicators of subsurface conditions: impact of groundwater level on BTEX concentrations in trees.

Int J Phytoremediation 2013 ;15(9):900-10

Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, Missouri, USA.

Numerous studies have demonstrated trees' ability to extract and translocate moderately hydrophobic contaminants, and sampling trees for compounds such as BTEX can help delineate plumes in the field. However, when BTEX is detected in the groundwater, detection in nearby trees is not as reliable an indicator of subsurface contamination as other compounds such as chlorinated solvents. Aerobic rhizospheric and bulk soil degradation is a potential explanation for the observed variability of BTEX in trees as compared to groundwater concentrations. Read More

View Article
March 2014

Bio-removal of mixture of benzene, toluene, ethylbenzene, and xylenes/total petroleum hydrocarbons/trichloroethylene from contaminated water.

J Environ Sci (China) 2009 ;21(6):758-63

Department of Civil and Environmental Engineering, Faculty of Science and Technology, University of Macau, Macau SAR, China.

Four pure cultures were isolated from soil samples potentially contaminated with gasoline compounds either at a construction site near a gas station in Fai Chi Kei, Macau SAR or in the northern parts of China (Beijing, and Hebei and Shandong). The effects of different concentrations of benzene, toluene, ethylbenzene, and three isomers (ortho-, meta-, and para-) of xylene (BTEX), total petroleum hydrocarbons (TPH), and trichloroethylene (TCE), when they were present in mixtures, on the bio-removal efficiencies of microbial isolates were investigated, together with their interactions during the bio-removal process. When the isolates were tested for the BTEX (50-350 mg/L)/TPH (2000 mg/L) mixture, BTEoX in BTEoX/TPH mixture was shown with higher bio-removal efficiencies, while BTEmX in BTEmX/TPH mixture was shown with the lowest, regardless of isolates. Read More

View Article
October 2009