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Ecotoxicol Environ Saf. 2014 Apr;102:147-51. doi: 10.1016/j.ecoenv.2014.01.032. Epub 2014 Feb 14.

Uptake of toluene and ethylbenzene by plants: removal of volatile indoor air contaminants.

Author information

1
School of Bioresources and Technology, King Mongkut׳s University of Technology Thonburi, Bangkok 10150, Thailand.
2
Department of Urban and Industrial Environment, Science and Technology Faculty, Suan Dusit Rajabhat University, Bangkok 10300, Thailand.
3
School of Bioresources and Technology, King Mongkut׳s University of Technology Thonburi, Bangkok 10150, Thailand. Electronic address: paitip.thi@kmutt.ac.th.

Abstract

Air borne uptake of toluene and ethylbenzene by twelve plant species was examined. Of the twelve plant species examined, the highest toluene removal was found in Sansevieria trifasciata, while the ethylbenzene removal from air was with Chlorophytum comosum. Toluene and ethylbenzene can penetrate the plant׳s cuticle. However, the removal rates do not appear to be correlated with numbers of stomata per plant. It was found that wax of S. trifasciata and Sansevieria hyacinthoides had greater absorption of toluene and ethylbenzene, and it contained high hexadecanoic acid. Hexadecanoic acid might be involved in toluene and ethylbenzene adsorption by cuticles wax of plants. Chlorophyll fluorescence analysis or the potential quantum yield of PSII (Fv/Fm) in toluene exposed plants showed no significant differences between the control and the treated plants, whereas plants exposed to ethylbenzene showed significant differences or those parameters, specifically in Dracaena deremensis (Lemon lime), Dracaena sanderiana, Kalanchoe blossfeldiana, and Cordyline fruticosa. The Fv/Fm ratio can give insight into the ability of plants to tolerate (indoor) air pollution by volatile organic chemicals (VOC). This index can be used for identification of suitable plants for treating/sequestering VOCs in contaminated air.

KEYWORDS:

Ethylbenzene; Phytoremediation; Toluene; Volatile organic compounds (VOCs)

PMID:
24530730
DOI:
10.1016/j.ecoenv.2014.01.032
[Indexed for MEDLINE]
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