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• 研究报告 • 上一篇    下一篇

紫松果菊对多环芳烃重污染土壤修复效能

张晓庆1,2,徐丽1*,齐悦3,孙立波4,张慤5   

  1. (1沈阳建筑大学市政与环境工程学院, 沈阳 110168;2中国科学院沈阳应用生态研究所, 中国科学院污染生态与环境工程重点实验室, 沈阳 110016;3国网辽宁省电力有限公司电力科学研究院, 沈阳 110006;4浙江长征职业技术学院, 杭州 310023;5沈阳广播电视大学,沈阳 110013)
  • 出版日期:2018-02-10 发布日期:2018-02-10

Remediation efficiency ofEchinacea purpurea for heavy PAHs contaminated soils.

ZHANG Xiao-qing1,2, XU Li1*, QI Yue3, SUN Li-bo4, ZHANG Que5   

  1. (1College of Municipal and Environmental engineering, Shenyang Jianzhu University, Shenyang 110168, China; 2Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 3State Grid Liaoning Electric Power Co., Ltd, Shenyang 110006, China; 4Zhejiang Changzheng Vocational and Technical College, Hangzhou 310023, China; 5Shenyang Open University, Shenyang 110013, China)
    .
  • Online:2018-02-10 Published:2018-02-10

摘要: 采用盆栽试验,以实际油田污染土与自然土和沙土按照一定比例配置两种污染浓度的土壤(PAHs总浓度分别为122.40和183.60 mg·kg-1),以株高、生物量变化以及芘(Pyr)、屈(CHR)、苯并b荧蒽(BbF)、苯并k荧蒽(BkF)4种多环芳烃去除率为指标,研究了紫松果菊对PAHs污染土壤的修复效能。结果表明:(1)4种多环芳烃污染土壤对紫松果菊株高和生物量有明显抑制作用,在PAHs总浓度为183.60 mg·kg-1时,紫松果菊仍能存活,说明紫松果菊对PAHs污染土壤具有较强的耐性。(2)在PAHs总浓度为183.60mg·kg-1时,紫松果菊对土壤中4种PAHs的去除率分别为66.2%、70.3%、40.6%和65.4%,4种PAHs的总量由183.60 mg·kg-1降到104.52 mg·kg-1,总去除率为56.93%,远大于对照组中PAHs总去除率。说明紫松果菊具有修复PAHs重污染土壤的潜能。相关性分析发现,PAHs的去除率与地下生物量的相关性更好,说明植物地下生物量对多环芳烃去除率影响较大。本研究拓展了利用植物修复PAHs污染土壤的应用范围,使重污染土壤的植物修复成为可能。

关键词: 鄱阳湖地区, 生态系统服务, 权衡与协同, 土地利用

Abstract: The phytoremediation potential ofEchinacea purpurea on PAHs heavily contaminated soils was investigated with pot experiment. The polluted soils were collected from an oil field. Two types of soils with different concentrations of PAHs (122.40 and 183.60 mg·kg-1) were prepared by adding a given proportion of polluted soil, non-polluted soil, sandy soil, and PAHs multicompound standards. The height and biomass ofE. purpurea, and the removal rate of four kinds of PAHs, pyrene(Pyr), chrysene (CHR), benzo(b)fluoranthene (BbF), benzo(k)fluoranthene (BkF), were measured. The results showed that: (1) The height and biomass were significantly inhibited by PAHs, but E. purpurea still could survive with the total PAHsconcentration at 183.60 mg·kg-1. (2) The removal rates of Pyr, CHR, BbF and BkF were 66.2%, 70.3%, 40.6% and 65.4%, respectively. The total PAHs decreased from 183.60 mg·kg-1 to 104.52 mg·kg-1. The total removal rate of four kinds of PAHs was 56.93%, which was much higher than that in the control. This result demonstrated thatE. purpurea has a good potential for phytoremediation of heavily PAHs contaminated soils. The significant correlation between theremoval rate of PAHs and belowground biomass indicated that the belowground biomass of plants had a greater influence on the removal rate of PAHs. This study expanded the application range of phytoremediation on PAHs contaminated soils.

Key words: ecosystem service, trade-off and synergy, Poyang Lake region, land use