Environmental factors responses to petroleum-contaminated soil in situ remediation by using a combination of Calendula officinalis and microbial agent in eastern Gansu ProvinceChinese Full Text
WANG Jincheng;JING Mingbo;DUAN Chunyan;ZHANG Xibiao;LIU Jianxin;XIAO Zhaoxia;ZHOU Tianlin;University Provincial Key Laboratory for Protection and Utilization of Longdong Bio-resources in Gansu Province;College of Life Science and Technology,Longdong University;
Abstract: In order to select appropriate native plant species in eastern Gansu Province for combined remediation of petroleum-contaminated soil of loess plateau,the native plant Calendula officinalis had been selected to do the in situ remediation of petroleum-contaminated soil combined with the microbial agent for 5 months. The changes and the responses to the remediation in soil physical and chemical properties as well as enzyme activities were investigated using the conventional methods,and the functional diversity of microbial community was analyzed based on PCR-DGGE. We found that with progress ofthe remediation,soil urease,polyphenol oxidase,dehydrogenase,catalase activities as well as soil electric conductivity,available N,available K and available P significantly increased（ p ＜ 0. 05）,while soil TPHs content,p H,organic matter and salt rate significantly decreased（ p ＜ 0. 05）. Microbial genetic diversity index of Shannon-Wiener and abundance index Patrick showed an increase trend during in-situ remediation. Principal component analysis indicated that the environmental factors including soil urease,dehydrogenase and available N played the promoting role,while soil organic matter might be harmful to the phytoremediation using the Calendula officinalis. For the combined-remediation using Calendula officinalis and microbial agent,soil polyphenol oxidase,dehydrogenase,available N,and available K played the main promoting role,while soil TPHs might impact the remediation effect.All of the results mentioned above were conducive to selecting the best combination among local soil category-appropriate native plant species-local oildegradating microflora,and offered new technical scheme and background information for the remediation of petroleum-contaminated soil in eastern Gansu Province.
Keywords：
Eastern Gansu Province of loess plateau; oil-contaminated soil; Calendula officinalis; combined-remediation; environmental factors;
- DOI：
10.13671/j.hjkxxb.2014.0961
- Series：
- Subject：
- Classification Code：
X53;X17
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