Cheng Shuiping, Xiao Jin, Xiao Huiping, Zhang Liping, Wu Zhenbin
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan, PR China.
Int J Phytoremediation. 2007 Nov-Dec;9(6):453-63. doi: 10.1080/15226510701709531.
The phytoremediation of triazophos (O, O-diethyl-O-(1-phenyl-1, 2, 4-triazole-3-base) sulfur phosphate, TAP) by Canna indica Linn. in a hydroponic system was studied. After 21 d of exposure, the removal kinetic constant (K) of TAP was 0.0229-0.0339 d(-1) and the removal percentage of TAP was 41-55% in the plant system and the K and removal percentage of TAP were about 0.002 d(-1) and 1%, respectively, in darkness and disinfected control. However, the K and removal percentage of TAP were 0.006 d(-1) and approximately 11%, respectively, in the treatment with eluate from the media of constructed wetland. The contribution of plant to the remediation of TAP was 74% and C. indica played the most important role in the hydroponic system. Under the stress of TAP and without inorganic phosphorus nutrient, the activity of phosphatase in the plant system increased and phytodegradation was observed. The production and release of phosphatase is seen as the key mechanism for C. indica to degrade TAP. C. indica, which showed the potential of phytoremediation of TAP, and is commonly used in constructed wetland, so the technique of phytoremediation of TAP from contaminated water can be developed with the combination of constructed wetland.
研究了美人蕉在水培系统中对三唑磷（O，O-二乙基-O-（1-苯基-1，2，4-三唑-3-基）硫代磷酸酯，TAP）的植物修复作用。暴露21天后，植物系统中三唑磷的去除动力学常数（K）为0.0229 - 0.0339 d⁻¹，三唑磷的去除率为41% - 55%，而在黑暗和消毒对照中，三唑磷的K和去除率分别约为0.002 d⁻¹和1%。然而，在用人工湿地介质洗脱液处理时，三唑磷的K和去除率分别为0.006 d⁻¹和约11%。植物对三唑磷修复的贡献率为74%，美人蕉在水培系统中起最重要作用。在三唑磷胁迫且无无机磷营养的情况下，植物系统中磷酸酶活性增加，观察到植物降解作用。磷酸酶的产生和释放被视为美人蕉降解三唑磷的关键机制。美人蕉显示出对三唑磷进行植物修复的潜力，且常用于人工湿地，因此可结合人工湿地开发从受污染水体中植物修复三唑磷的技术。
