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- W1978595552 abstract "This field-scale hydroponic experiment investigated the effects of plant density and nutrient levels on arsenic (As) removal by the As-hyperaccumulator Pteris vittata L. (Chinese brake fern). All ferns were grown in plastic tanks containing 30 L of As-contaminated groundwater (130 μg·L−1 As) collected from South Florida. The treatments consisted of four plant densities (zero, one, two, or four plants per 30 L), two nitrogen (N) concentrations (50% or 100% of 0.25-strength Hoagland solution [HS]), and two phosphorous (P) concentrations (15% and 30% of 0.25 strength HS). While low P was more effective than high P for plant As removal initially, N levels showed little effect. At 15% P, it took 3 wk for the ferns at a plant density of four to reduce As to less than 10 μg L−1 (USEPA and WHO standard), whereas it took 4–6 wk at plant densities of one or two. For reused ferns, established plants with more extensive roots than “first-time” ferns, a low plant density of one plant/30 L was more effective, reducing As in water to less than 10 μg L−1 in 8 h. This translates to an As removal rate of 400 μg h−1plant−1, which is the highest rate reported to date. Arsenic-concentration in tanks with no plants as a control remained high throughout the experiment. Using more established ferns supplemented with dilute nutrients (0.25 HS with 25% N and 15% P) with optimized plant density (one plant per 30 L) reduced interplant competition and secondary contamination from nutrients, and can be recommended for phytofiltration of As-contaminated groundwater. This study demonstrated that P. vittata is effective in remediating As-contaminated groundwater to meet recommended standards." @default.
- W1978595552 created "2016-06-24" @default.
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- W1978595552 date "2008-05-20" @default.
- W1978595552 modified "2023-10-16" @default.
- W1978595552 title "Phytofiltration of Arsenic-Contaminated Groundwater Using<i>Pteris Vittata</i>L.: Effect of Plant Density and Nitrogen and Phosphorus Levels" @default.
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- W1978595552 doi "https://doi.org/10.1080/15226510801997754" @default.
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