1.重庆大学土木工程学院,重庆 400030
2.重庆大学山地城镇建设与新技术教育部重点实验室,重庆 400030
3.重庆工商大学通识学院,重庆 400020
曹小方(1991—),女,硕士研究生。主要从事环境岩土工程微生物修复技术研究。E-mail:cxf120368881@163.com
方祥位(1975—),男,教授,博导,博士。主要从事非饱和土与特殊土力学及岩土微生物技术研究。 E-mail:fangxiangwei1975@163.com
收稿:2020-04-27,
修回:2020-11-09,
纸质出版:2021-06-16
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曹小方,方祥位,刘汉龙等.微生物修复柴油污染土试验研究[J].防灾减灾工程学报,2021,41(03):477-484.
CAO Xiaofang,FANG Xiangwei,LIU Hanlong,et al.Experimental Study on Microbial Remediation of Diesel Contaminated Soil[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):477-484.
曹小方,方祥位,刘汉龙等.微生物修复柴油污染土试验研究[J].防灾减灾工程学报,2021,41(03):477-484. DOI: 10.13409/j.cnki.jdpme.2020110912.
CAO Xiaofang,FANG Xiangwei,LIU Hanlong,et al.Experimental Study on Microbial Remediation of Diesel Contaminated Soil[J].Journal of Disaster Prevention and Mitigation Engineering,2021,41(03):477-484. DOI: 10.13409/j.cnki.jdpme.2020110912.
为比较提取的5种降解菌及混合菌修复柴油污染土的能力,利用超声萃取-紫外分光光度法对修复后柴油污染土剩余油浓度进行测定,研究温度、pH、含水率及接种量等对柴油污染土降解效果的影响。结果表明,降解菌的降解率随温度升高先增大后减小, 且温度为32 ℃时,六种组合柴油污染土的降解率均达到最大值;随pH增大,苍白杆菌属的降解率逐渐减小,铜绿假单胞菌的降解率逐渐增加,假单胞菌属、戈登氏菌属和混合菌的降解率先减小后增大,博德特氏菌的降解率先增大后减小;随含水率增大,苍白杆菌属和混合菌的降解率先增大后减小,假单胞菌属、戈登氏菌属、铜绿假单胞菌和博德特氏菌属的降解率呈上升趋势;随接种量增大,苍白杆菌属和混合菌的降解率先增大后减小,假单胞菌属、戈登氏菌属、铜绿假单胞菌和博德特氏菌属的降解率先减小后增大。通过对比试验建议使用混合菌修复柴油污染土,并给出了降解优化条件。
In order to compare the ability of self-extracted petroleum hydrocarbon degrading bacteria to repair diesel contaminated soil, the concentration of residual oil in the repaired diesel contaminated soil was measured by ultrasonic extraction ultraviolet spectrophotometry, and temperature, pH, water content and inoculation amount of degrading bacteria on the degradation of diesel contaminated soil were studied. The results showed that the degradation rate of degradation bacteria increased first and then decreased with the increase of temperature, when the temperature was 32℃, the degradation rate of six combinations reached the maximum; With the increase of pH, the degradation rate of Phytophthora decreased gradually, the degradation rate of Pseudomonas aeruginosa
increased gradually, the degradation rate of
Pseudomonas, Gordonia and mixed bacteria decreased firstly and then increased, and the degradation rate of Bordetella increased firstly and then decreased; with the increase of water content, the degradation rate of Phytophthora
and mixed bacteria increased firstly and then decreased, the degradation rate of Pseudomonas, Gordonia, Pseudomonas aeruginosa
and Bordetella showed an increasing trend; with the increase of inoculation amount of degradation bacteria, the degradation rate of Phytophthora and mixed bacteria increased first and then decreased, and the degradation rate of Pseudomonas, Gordonia, Pseudomonas aeruginosa
and Bordetella decreased first and then increased. It was suggested that mixed bacteria should be used to repair diesel contaminated soil and the optimal degradation conditions are given.
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