芦苇修复新疆石油污染土壤效果

Phytoremediation of petroleum contaminated soil by reed in Xinjiang

考察芦苇对新疆污染土壤石油烃的处理效能、石油烃对芦苇生长的影响及不同石油污染度条件下芦苇根际微生物数量的变化。研究结果表明:经过123 d的芦苇修复,石油烃去除率可到41.21%～62.14%,明显高于空白样(19.75%～37.92%),其中饱和烃去除效果最好,可达60.52%～73.11%;芦苇对原油污染具有较好的耐受性,在土壤石油污染率低于1.25%情况下能够有效促进土壤中石油烃的去除;芦苇根际土壤中微生物数量与原油降解率呈正相关关系,芦苇根际效应促进原油降解菌数量的增加和活性的增强;芦苇的修复以根际效应为主,芦苇根际恰当的微生物类群为土壤原油降解提供有利保障。

Reed was applied to remediate the petroleum contaminated soil in Xinjiang.The effects of petroleum hydrocarbons on the growth of reeds and the change of microorganisms number in reed rhizosphere in the conditions of oil pollution were investigated.The results show that total petroleum hydrocarbon removal of phytoremediation by reed could reach as high as 41.21%-62.14%,is significantly higher than the blank sample control of 19.75%-37.92%.The saturated hydrocarbon removal is higher than the other component in petroleum and arrives at 60.52%-73.11%.The reed is well tolerated with crude oil pollution.When the petroleum contamination rate is less than 1.25%,the reed can effectively promote the removal of petroleum hydrocarbons in the soil.Microorganism number in reed rhizosphere has a positive correlation with the petroleum removal.The planting of reed enhances the activities of petroleum degrading species.The remediation of reed depends on rhizosphere.The suitable microbial communities guarantee the remediation of petroleum in soil by reed.