Abstract
The potential of natural surfactant tea saponin to enhance uptake of polychlorinated biphenyls (PCBs) and cadmium (Cd) by Zea Mays L. and Saccharum officinarum L. was investigated. With addition of tea saponin at 0.01% in solution culture, the concentrations of PCB 14, PCB 18, PCB 77 and PCB 156 in root of corn seedling were 2.72, 2.68, 1.94 and 2.40 times as those of treatments without adding any surfactant, respectively. Application of tea saponin to the soil significantly elevated PCB 5 accumulation in shoots and roots ( p < 0.05) by sugarcanes. With addition of 0.3% tea saponin, Cd concentration was increased by 96.9% in roots, 156.8% in stems and 30.1% in leaves compared with the treatment without addition of surfactant in sugarcane grown in soil. Tea saponin had potential of assisting the uptake of PCBs and Cd by plants from water solution and soil.
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