Liao Changjun, Xu Wending, Lu Guining, Liang Xujun, Guo Chuling, Yang Chen, Dang Zhi
a School of Environment and Energy, South China University of Technology , Guangzhou , PR China.
Int J Phytoremediation. 2015;17(7):693-700. doi: 10.1080/15226514.2014.964840.
This study has investigated the use of screened maize for remediation of soil contaminated with crude oil. Pots experiment was carried out for 60 days by transplanting maize seedlings into spiked soils. The results showed that certain amount of crude oil in soil (≤2 147 mg·kg(-1)) could enhance the production of shoot biomass of maize. Higher concentration (6 373 mg·kg(-1)) did not significantly inhibit the growth of plant maize (including shoot and root). Analysis of plant shoot by GC-MS showed that low molecular weight polycyclic aromatic hydrocarbons (PAHs) were detected in maize tissues, but PAHs concentration in the plant did not increase with higher concentration of crude oil in soil. The reduction of total petroleum hydrocarbon in planted soil was up to 52.21-72.84%, while that of the corresponding controls was only 25.85-34.22% in two months. In addition, data from physiological and biochemical indexes demonstrated a favorable adaptability of maize to crude oil pollution stress. This study suggested that the use of maize (Zea mays L.) was a good choice for remediation of soil contaminated with petroleum within a certain range of concentrations.
本研究调查了筛选出的玉米对原油污染土壤的修复作用。通过将玉米幼苗移栽到添加原油的土壤中进行了为期60天的盆栽试验。结果表明，土壤中一定量的原油（≤2 147 mg·kg(-1)）可提高玉米地上部生物量的产量。较高浓度（6 373 mg·kg(-1)）并未显著抑制玉米植株（包括地上部和根部）的生长。通过气相色谱-质谱联用仪对植物地上部进行分析表明，在玉米组织中检测到了低分子量多环芳烃（PAHs），但植物中PAHs的浓度并未随着土壤中原油浓度的升高而增加。在两个月内，种植土壤中石油类总烃的去除率高达52.21 - 72.84%，而相应对照的去除率仅为25.85 - 34.22%。此外，生理生化指标数据表明玉米对原油污染胁迫具有良好的适应性。本研究表明，在一定浓度范围内，利用玉米（Zea mays L.）修复石油污染土壤是一个不错的选择。
