Alvarez-Bernal D, Contreras-Ramos S, Marsch R, Dendooven L
Laboratory of Soil Ecology, Department of Biotechnology and Bioengineering, Cinvestav, México.
Int J Phytoremediation. 2007 Mar-Apr;9(2):79-90. doi: 10.1080/15226510701232690.
Phytoremediation is a cost-effective biotechnology for decontamination of polycyclic aromatic hydrocarbons (PAHs)-polluted soils. A greenhouse experiment was conducted to determine the growth of Mimosa monancistra, a N2-fixing leguminous plants, and its capacity to remove phenanthrene, anthracene, and benzo(a)pyrene (BaP)from soil. The PAHs decreased shoot and root dry biomass of M. monancistra 2.7- and 3.9-fold, respectively, compared to uncontaminated soil and inhibited nodule formation. The removal of phenanthrene and anthracene was similar in vegetated and unvegetated soil, but the dissipation of BaP was significantly faster in vegetated soil as compared to unvegetated soil after 14, 56, 70, and 90 d. After 90 d, dissipation of BaP was 96% in vegetated soil and 87% in unvegetated soil. Nitrification and ammonification were not affected by the addition of PAHs as concentrations of NH4+, NO2-, and NO3- were similar in contaminated and uncontaminated vegetated soil. Growth of M. monancistra was inhibited by contamination with hydrocarbons, but removal of BaP was accelerated in the rhizosphere.
植物修复是一种用于净化多环芳烃（PAHs）污染土壤的具有成本效益的生物技术。进行了一项温室实验，以测定固氮豆科植物含羞草的生长情况及其从土壤中去除菲、蒽和苯并[a]芘（BaP）的能力。与未受污染的土壤相比，PAHs分别使含羞草地上部和根部的干生物量降低了2.7倍和3.9倍，并抑制了根瘤的形成。在有植被和无植被的土壤中，菲和蒽的去除情况相似，但在14、56、70和90天后，与无植被土壤相比，有植被土壤中BaP的消散明显更快。90天后，有植被土壤中BaP的消散率为96%，无植被土壤中为87%。硝化作用和氨化作用不受PAHs添加的影响，因为在受污染和未受污染的有植被土壤中，NH4+、NO2-和NO3-的浓度相似。含羞草的生长受到碳氢化合物污染的抑制，但根际中BaP的去除加速。
