| 一株苯并[a]芘降解菌-紫茉莉联合修复污染土壤的研究 |
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| 引用本文： | 顾平,周启星,王鑫,张倩茹,伍跃辉,陈威,赵伟,李博.一株苯并[a]芘降解菌-紫茉莉联合修复污染土壤的研究[J].环境科学学报,2018,38(4):1613-1620. |
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| 作者姓名： | 顾平 周启星 王鑫 张倩茹 伍跃辉 陈威 赵伟 李博 |
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| 作者单位： | 黑龙江省环境监测中心站;中国科学院沈阳应用生态研究所;南开大学环境科学与工程学院环境污染过程与基准教育部重点实验室/天津市城市生态环境修复与污染防治重点实验室; |
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| 基金项目： | 中央高校基本科研业务费专项资金；高等学校学科创新引智计划（111计划）（No.T2017002） |
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| 摘 要： | 从长期受多环芳烃(PAHs)污染的土壤中获得1株高效降解菌BB-1,经鉴定为巨大芽孢杆菌Bacillus megaterium.为了考察菌株的降解特性,将10和20 mg·L~(-1)的苯并a]芘(Ba]P)加入到培养液中并在30℃下振荡培养8 d.结果表明,BB-1对不同浓度的Ba]P的降解率分别为52.1%和23.5%,Ba]P浓度为10 mg·L~(-1)时降解效果更优.将不同重金属外加到培养液中,Cu2+(50 mg·L~(-1))和Cd2+(100 mg·L~(-1))能在一定程度上影响BB-1对Ba]P的生物降解作用,但菌株仍有很强的耐受性;Zn2+(200 mg·L~(-1))和Pb2+(300 mg·L~(-1))会显著影响降解效果.为了研究菌BB-1与植物的联合降解修复作用,通过对比研究将该菌株加入到种植紫茉莉的Ba]P污染土壤中,在未加入BB-1的污染土壤中,紫茉莉在开花期和成熟期对Ba]P的降解率分别为27.42%±1.99%和51.31%±3.06%,在加入BB-1的污染土壤中降解率分别为68.22%±1.21%和77.16%±0.62%,可见加入菌株BB-1后能显著提高紫茉莉对土壤中Ba]P的降解效率.为确定降解作用的菌株来源,分别对比了非根际和根际土壤中的Ba]P含量,发现在开花期和成熟期任何一种处理的根际土中Ba]P残留浓度都小于非根际土,说明土壤中Ba]P的去除主要是源于根际的作用.在植物修复的基础上,添加能耐受一定重金属浓度的高效Ba]P降解菌,能提高Ba]P降解率,有望为日后大规模田间应用提供可靠的技术参数.
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| 关 键 词： | 多环芳烃 苯并[a]芘 污染土壤 生物降解 微生物-植物联合修复 根际效应 |
| 收稿时间： | 2017/8/23 0:00:00 |
| 修稿时间： | 2017/10/10 0:00:00 |
Joint remediation of contaminated soil by an effective degradation bacteria of B[a]P and Mirabilis jalapa |
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| GU Ping,ZHOU Qixing,WANG Xin,ZHANG Qianru,WU Yuehui,CHEN Wei,ZHAO Wei and LI Bo.Joint remediation of contaminated soil by an effective degradation bacteria of B[a]P and Mirabilis jalapa[J].Acta Scientiae Circumstantiae,2018,38(4):1613-1620. |
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| Authors: | GU Ping ZHOU Qixing WANG Xin ZHANG Qianru WU Yuehui CHEN Wei ZHAO Wei and LI Bo |
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| Affiliation: | 1. Heilongjiang Provincial Environmental Monitoring Center Station, Harbin 150056;2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071,Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016,Heilongjiang Provincial Environmental Monitoring Center Station, Harbin 150056,Heilongjiang Provincial Environmental Monitoring Center Station, Harbin 150056,Heilongjiang Provincial Environmental Monitoring Center Station, Harbin 150056 and Heilongjiang Provincial Environmental Monitoring Center Station, Harbin 150056 |
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| Abstract: | |
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| Keywords: | polycyclic aromatic hydrocarbons (PAHs) benzo[a]pyrene (B[a]P) contaminated soil biodegradation joint microbiological-phytoremediation rhizospheric effect |
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