| 微生物对地下水中萘的降解特性及动力学研究 |
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| 引用本文： | 张晟瑀,张朦幻,王利刚,万玉玉.微生物对地下水中萘的降解特性及动力学研究[J].地学前缘,2021,28(5):146-158. |
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| 作者姓名： | 张晟瑀 张朦幻 王利刚 万玉玉 |
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| 作者单位： | 吉林大学水资源与环境研究所,吉林长春130012;吉林大学新能源与环境学院,吉林长春130012;中国昆仑工程有限公司吉林分公司,吉林吉林132000 |
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| 基金项目： | 国家自然科学基金项目(U19A20107) |
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| 摘 要： | 针对我国东北某石油烃污染场地地下水中的萘污染,筛选出了Acinetobacter和Pseudomonas菌属的高效萘降解菌群。该菌群对萘的耐受性较高,且具有良好的乳化性,能够自动调节细胞表面疏水性和自聚集性。不同pH值、萘初始浓度、温度和菌接种量对萘降解效率的影响研究表明:最适菌群生长的pH范围为7.08.0;萘降解效率和速率在1.005.00 mg/L范围内与其初始浓度成正比;在1030 ℃温度范围内均表现出较高的萘降解效率。在此基础上,利用Guass、GuassAmp、LogNomal、Poisson和Pulse数学模型对萘的降解过程进行拟合,其降解速率更符合GuassAmp模型。通过将降解动力学模型中的常数与影响因素相关联,推导出了拟合度较高的多因素影响下的萘降解动力学方程。
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| 关 键 词： | 地下水 萘 生物降解 微生物群落 动力学 |
| 收稿时间： | 2020-05-25 |
Degradation of naphthalene by microorganisms in groundwater: Characteristics and kinetics |
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| ZHANG Shengyu,ZHANG Menghuan,WANG Ligang,WAN Yuyu.Degradation of naphthalene by microorganisms in groundwater: Characteristics and kinetics[J].Earth Science Frontiers,2021,28(5):146-158. |
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| Authors: | ZHANG Shengyu ZHANG Menghuan WANG Ligang WAN Yuyu |
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| Institution: | 1. Institute of Water Resource and Environment, Jilin University, Changchun 130012, China2. College of New Energy and Environment, Jilin University, Changchun 130012, China3. Jilin Branch of China Kunlun Engineering Co., Ltd., Jilin 132000, China |
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| Abstract: | The effective naphthalene degrading bacteria Acinetobacter sp. and Pseudomonas sp. were discovered through a screening of petroleum contaminated groundwater in Northeast China. These bacteria had high tolerance to naphthalene and good emulsification effect, and can automatically regulate cell surface hydrophobicity and self-aggregation. The effects of pH, naphthalene initial concentration, temperature and inoculation condition on naphthalene degradation were studied experimentally. We found that the optimal pH range for bacterial growth was 7.0-8.0; the degradation efficiency was positively correlated with the naphthalene initial concentration of 1.00-5.00 mg/L; and the bacteria performed most efficiently between 10-30 ℃. On this basis, the Guass, GuassAmp, LogNomal, Poisson and Pulse models were used to fit the degradation kinetics measurements. In the final analysis, the GuassAmp model gave the best fit and the kinetic equation of naphthalene degradation under the influence of multiple factors was derived. |
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| Keywords: | groundwater naphthalene biodegradation mixed bacterial community kinetics |
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