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首页> 外文期刊>Environmental Science and Pollution Research >Phytoremediation of chlorpyrifos in aqueous system by riverine macrophyte, Acorus calamus: toxicity and removal rate
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Phytoremediation of chlorpyrifos in aqueous system by riverine macrophyte, Acorus calamus: toxicity and removal rate

机译：河滨大型植物Acorus calamus对水体中毒死rif的植物修复：毒性和去除率

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摘要

The potential of Acorus calamus to remove chlorpyrifos from water was assessed under laboratory conditions. Toxic effects of the insecticide in A. calamus were evaluated using pulse-amplitude modulated chlorophyll fluorescence techniques as well. At exposure concentrations above 8 mg L-1, A. calamus showed obvious phytotoxic symptom with significant reduction in quantum efficiency of PSII (Phi PSII) and photochemical quenching coefficient (qP) in 20-day test; the inhibition of maximal quantum efficiency of PSII (Fv/Fm) was accompanied by a significant rise in initial chlorophyll fluorescence (Fo) within 15-day exposures. Fv/Fm and Fo recover to the normal level after 20-day exposure. The reduced removal rate to chlorpyrifos was observed with increase of initial chlorpyrifos concentrations. At application levels of 1, 2, and 4 mg L-1, the disappearance rate of chlorpyrifos in the hydroponic system with plants was significantly greater than that without plants during the 20-day test periods. Chlorpyrifos was taken up from medium and transferred to above ground tissues by the plant and significant amounts of chlorpyrifos accumulated in plant tissues. The result indicated that A. calamus can promote the disappearance of chlorpyrifos from water and may be used for phytoremediation of water contaminated with a relatively low concentration of chlorpyrifos insecticide (<4 mg L-1).
机译：在实验室条件下评估了cor蒲cor蒲从水中去除毒死rif的潜力。还使用脉冲幅度调制叶绿素荧光技术评估了杀虫剂对cal蒲的毒性作用。暴露浓度高于8 mg L-1时，cal蒲在20天试验中表现出明显的植物毒性症状，其PSII（Phi PSII）量子效率和光化学猝灭系数（qP）显着降低; PSII的最大量子效率（Fv / Fm）受到抑制，同时暴露15天之内的初始叶绿素荧光（Fo）显着增加。暴露20天后，Fv / Fm和Fo恢复至正常水平。随着初始毒死rif浓度的增加，观察到对毒死rif的去除率降低。在1、2和4 mg L-1的施用水平下，在20天的试验期内，有植物的水培系统中毒死rif的消失率明显高于无植物的毒死rif。毒死rif从培养基中吸收并被植物转移到地上组织，大量毒死rif积累在植物组织中。结果表明cal蒲可促进水中毒死rif的消失，可用于对浓度较低的毒死rif（<4 mg L-1）污染的水进行植物修复。

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