Khanitta Somtrakoon and Waraporn Chouychai

DOI: 10.14456/sjst-psu.2019.179

pp. 1413 - 1420

Abstract

The ability of Triton X-100 and Tween 80 to stimulate phytoremediation of soil contaminated with phenanthrene
(204.5 mg kg^-1
), pyrene (253.6 mg kg^-1
), and cadmium (81.0 mg kg^-1
) by Siam weed (Chromolaena odorata) was studied. The
results revealed that only 10 × critical micelle concentration of Triton X-100 added in soil planted with Siam weed could increase
phenanthrene removal compared with unplanted soil that received the same surfactant at 60 days after transplantation. Also, there
were no significant differences on polycyclic aromatic hydrocarbon removal in planted soil that received different surfactants.
The amounts of phenanthrene and pyrene that remained in the planted soil were 7.4 and 16.7 mg kg^-1
, respectively, while those
remaining in the planted soil with surfactant addition were around 6.7–9.9 and 11.7–24.1 mg kg^-1
, respectively. Moreover, the
addition of Triton X-100 and Tween 80 tended to decrease the accumulation of cadmium in the shoot of Siam weed.