Uptake of chlorophenols by rye grass: role of physicochemical processes.

摘要

Rye grass was grown in the presence of 2,4,6-trichlorophenol (TCP) and pentachlorophenol(PCP). The grass removed substantial amounts of TCP and PCP from solution. The majority of the removed contaminant could not be recovered by ethanol extraction. This unrecoverable fraction is considered to be "internalized" by the plant. The mass fractions removed and internalized were much greater than the fraction of water transpired, indicating that other mechanisms besides translocation were important in plant-contamininant interactions. The relative root surface area was correlated with both chlorophenol removal and internalization, suggesting that sorption of the contaminants onto the roots from solution was an important factor in plant-contaminant interactions.