Influence of initial concentration of chlorpyrifos in aquatic environment on removal by softstem bullrush (Scirpus tabernaemontani Gmel.)
This work focused on the influence of initial concentration on toxidty and removal potential of chlorpyrifos by Scirpus tabernaemontani under laboratory greenhouse conditions. An increased sensitivity and reduced removal rate to chlorpyrifos were observed with increasing chlorpyrifos concentration. At initial concentrations of 0, 1 and 2 mg·L-1, the relative growth rates (RGRs) of S. tabernaemontani was not significantly different. In contrast, in the presence of 4, 8 and 16 mg·L-1 chlorpyrifos the RGRs were significantly inhibited. A negative relationship was found between RGR and initial concentration on day 20 after incubation. The removal kinetics constant of chlorpyrifos in solution was decreased with increasing initial concentration. Half-life of chlorpyrifos was shortened with plants. S. tabernaemontani was able to uptake chlorpyrifos and transfer it to its above ground tissues. S. Tabernaemontani can efficiently accelerated removal of chlorpyrifos from water and may ultimately serve as phytoremediation agents in the natural environment.
phytoremediation emergent plant Chlorpyrifos phytotoxicity
Qinghai Wang Juan Yang Cui Li Bo Xiao Juying Wu
Beijing research & development center for grass and environment Beijing academy of agriculture and forestry sciences Beijing, China
国际会议
吉林
英文
615-619
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）