Bench-Scale Phytoremediation of Polycyclic Aromatic Hydrocarbon-Contaminated Marine Sediment with Tropical Plants
Bench-Scale Phytoremediation of Polycyclic Aromatic Hydrocarbon-Contaminated Marine Sediment with Tropical Plants
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DOI：
10.1080/15226510208500089
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发表时间：
2002-10
影响因子：
3.7
通讯作者：
D. Paquin;R. Ogoshi;S. Campbell;Qing X. Li
中科院分区：
文献类型：
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作者：
D. Paquin;R. Ogoshi;S. Campbell;Qing X. Li
摘要在珍珠港疏浚的海洋沉积物中发现了高水平的多环芳烃（PAHs）。研究了土壤-沉积物系统（洗涤和未洗涤）和20种植物对多环芳烃的降解。在第一个实验中，海洋沉积物被天然土壤稀释。在第二和第三次实验中，分别用石膏溶液和水洗涤沉积物，然后进行土壤稀释。土壤稀释率分别为0，6，16，和37%的重量在第一个实验中，0，37，64，和100%在第二和0，18，64，和100%在第三个。七棵树，九个灌木，和四个草种在温室中生长12周。在所有实验中使用“无植物”对照。与无植物对照相比，在第一次实验中，几种植物物种产生了高达90%的PAH降解。在第二次种植中，矮生花（Hibiscus tiliaceus）和香根草（Vetiver zizanoides）似乎能最大限度地减少多环芳烃，而雀稗（Paspalum vaginatum）和瑙帕卡（Scaevola sericea）则不然。控制和种植土壤的苯并[a]芘和总PAH之间的最大差异发生在最高的沉积物比例。
ABSTRACT Elevated levels of polycyclic aromatic hydrocarbons (PAHs) were found in dredged marine sediment from Pearl Harbor. The degradation of PAHs was investigated with soil-sediment systems (washed and unwashed) and 20 plant species. Marine sediment was diluted with native soil in the first experiment. Sediment was washed with gypsum solution and water in the second and third experiments, respectively, prior to soil dilution. Soil dilution ratios were 0, 6, 16, and 37% by weight in the first experiment, 0, 37, 64, and 100% in the second and 0, 18, 64, and 100% in the third. Seven tree, nine shrub, and four grass species were grown for 12 weeks in a glasshouse. A “no plant” control was used in all the experiments. Several plant species yielded up to 90% PAH degradation in the first experiment when compared with no plant control. In the second planting, dwarf hau (Hibiscus tiliaceus) and vetiver (Vetiver zizanoides) appeared to cause the greatest PAH reduction, while paspalum (Paspalum vaginatum) and naupaka (Scaevola sericea) did not. The greatest difference between control and planted soil for both benzo[a]pyrene and total PAH occurred at the highest sediment ratios.