Rivera-Cruz María Del Carmen, Trujillo-Narcía Antonio, Trujillo-Rivera Eduardo A, Arias-Trinidad Alfredo, Mendoza-López María Remedios
a Laboratorio de Microbiología Ambiental, Colegio de Postgraduados , Periférico Carlos A. Molina s/n, H. Cárdenas , Tabasco , México.
b QFB Ambiental, Universidad Popular de la Chontalpa , H. Cárdenas , Tabasco , México.
Int J Phytoremediation. 2016 Sep;18(9):877-84. doi: 10.1080/15226514.2016.1156632.
An experiment was conducted in field for three years to assess the sustainability of aquatic plants Leersia hexandra, Cyperus articulatus, and Eleocharis palustris for use in the removal of total hydrocarbons of weathered oil in four areas contaminated with 60916-119373 mg/kg of hydrocarbons. The variables evaluated were coverage of plant, dry matter, density of plant growth-promoting rhizobacteria, and the removal of total weathered oil. The variables showed statistical differences (p = 0.05) due to the effects of time and the amount of oil in the soil. The three aquatic plants survived on the farm during the 36-month evaluation. The grass L. hexandra yielded the greatest coverage of plant but was inhibited by the toxicity of the oil, which, in contrast, stimulated the coverage of C. articulatus. The rhizosphere of L. hexandra in control soil was more densely colonized by N-fixing bacteria, while the density of phosphate and potassium solubilizing rhizobacteria was stimulated by exposure to oil. C. articulatus coverage showed positive relationship with the removal of weathered oil; positive effect between rhizosphere and L. hexandra grass coverage was also identified. These results contributed to the removal of weathered oil in Gleysols flooded and affected by chronic discharges of crude oil.
在田间进行了为期三年的实验，以评估水生植物李氏禾、节鞭莎草和牛毛毡在四个被60916 - 119373毫克/千克碳氢化合物污染的区域用于去除风化油中总碳氢化合物的可持续性。评估的变量包括植物覆盖率、干物质、促进植物生长的根际细菌密度以及风化油的去除量。由于时间和土壤中石油含量的影响，这些变量显示出统计学差异（p = 0.05）。在36个月的评估期间，这三种水生植物在农场中存活下来。李氏禾的植物覆盖率最高，但受到油毒性的抑制，相比之下，油刺激了节鞭莎草的覆盖率。对照土壤中李氏禾的根际被固氮细菌更密集地定殖，而暴露于油中会刺激解磷和解钾根际细菌的密度。节鞭莎草的覆盖率与风化油的去除呈正相关；还确定了根际与李氏禾草覆盖率之间的积极影响。这些结果有助于在受原油长期排放影响的淹水潜育土中去除风化油。
