Remediation of Petroleum-contaminated Soil Using Bulrush Straw Powder, Biochar and Nutrients
Remediation of Petroleum-contaminated Soil Using Bulrush Straw Powder, Biochar and Nutrients
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利用芦苇秸秆粉、生物炭和养分修复石油污染土壤
DOI：
10.1007/s00128-017-2064-z
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发表时间：
2017-03
影响因子：
2.7
通讯作者：
Xiangmin Rong
中科院分区：
文献类型：
--
作者：
Yanjie Wang;Fayun Li;Xiangmin Rong
本研究的目的是确定石油污染的土壤修复效率从油田在实验室条件下使用不同类型的修复处理。以未施用的土壤为对照（T1），分别施用芦苇秸秆粉（T2）、生物炭（T3）和生物炭与氮磷养分（T4）的复合处理。修复实验进行了8周。烃类降解的程度进行了监测重量分析，并通过气相色谱法分析的残余油馏分。添加生物质炭显著改善了污染土壤的持水力和养分状况（p < 0.05）。在添加生物炭和营养素的处理中，微生物总数显著增加（t = 23.429，p = 0.002）。T3和T4的总石油烃（TPH）和主要烃组分的降解率均高于T1和T2，T4的降解率更高。与其它处理相比，T4处理的正构烷烃组分、C27-C29甾烷和C33-C35高藿烷的强度有效降低。结果表明，生物炭和营养盐的联合施用可以有效修复石油污染土壤，且修复效果优于芦苇秸秆粉的联合施用，且修复效果上级。
The aim of this study was to determine the remediation efficiency of petroleum-contaminated soil from an oilfield using different types of remediation treatments under laboratory conditions. Compared with unamended soil as the control treatment (T1), soil samples were amended with bulrush straw powder (T2), with biochar alone (T3) and in combination with nutrients (nitrogen and phosphorus) (T4). The remediation experiment was carried out for 8 weeks. The extent of hydrocarbon degradation was monitored gravimetrically, and the residual oil fractions were analyzed by gas chromatography. The characteristics of the polluted soil (water-holding capacity and nutrients) were improved significantly by biochar addition (p < 0.05). The total microbial count increased significantly in the treatment containing biochar and added nutrients (t = 23.429, p = 0.002). The degradation of total petroleum hydrocarbons (TPH) and the main hydrocarbon fractions was higher in T3 and T4, especially in T4, than in T1 and T2. The intensities of the n-alkane fraction, C27–C29 steranes and C33–C35 homohopanes were efficiently decreased in T4 compared to the other treatments. According to the results, petroleum-contaminated soil can be remediated efficiently by adding biochar and nutrients simultaneously, and this combination of remediation was superior to that observed with added bulrush straw powder.
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