Basumatary Budhadev, Saikia Rubul, Bordoloi Sabitry
Resource Management and Environment Division, Institute of Advanced Study in Science and Technology, Guwahati-781 035, India.
J Environ Biol. 2012 Sep;33(5):891-6.
The aim of this study was to evaluate the efficacy of Cyperus rotundus (nut grass), that could be effective in phytoremediation of crude oil contaminated soil. A net house experiment was conducted with different concentrations (2.05, 4.08, 6.1, 8.15 and 10.2%) of crude oil-contaminated soil for 180 days. Plant growth, biomass, total oil and grease (TOG) degradation and microbial numbers were analyzed at different intervals i.e. 60,120 and 180 days in different percentages of crude oil contaminated soil. In presence of crude oil, plant biomass and heights reduced up to 26 and 21.9% respectively. Concerning TOG content in soil, C. rotundus could decrease up to 50.01, 46.1, 42.6, 38.8 and 32.6% in treatment I, II, III, IV and V respectively in vegetated pots during 180 days. In case of unvegetated pots, the reductions of TOG were 4.4, 5.6, 6.6, 7.6 and 9.6% in treatment A, B, C, D and E respectively. However, there was significant degradation (P = 0.05) of TOG in vegetated pots in comparison to unvegetated pots thereby proving the efficacy of this plant species for use in phytoremediation.
本研究的目的是评估香附子（莎草）对原油污染土壤进行植物修复的有效性。在网室内进行了一项实验，使用不同浓度（2.05%、4.08%、6.1%、8.15%和10.2%）的原油污染土壤，实验持续180天。在不同时间间隔，即60天、120天和180天，对不同百分比原油污染土壤中的植物生长、生物量、总油脂（TOG）降解和微生物数量进行了分析。在有原油存在的情况下，植物生物量和高度分别降低了26%和21.9%。关于土壤中的TOG含量，在180天的实验期内，种植香附子的花盆中，处理I、II、III、IV和V的TOG含量分别可降低50.01%、46.1%、42.6%、38.8%和32.6%。在未种植植物的花盆中，处理A、B、C、D和E的TOG含量分别降低了4.4%、5.6%、6.6%、7.6%和9.6%。然而，与未种植植物的花盆相比，种植香附子的花盆中TOG有显著降解（P = 0.05），从而证明了该植物物种用于植物修复的有效性。
