期刊文献+

植物–微生物联合对土壤不同粒径组分中PAHs的修复作用 被引量:12

Combined Effect of Plant and Microorganism on Degradation of PAHs in Different Particle Size Fractions
下载PDF
导出
摘要 采用温室盆栽试验,在种植紫花苜蓿的同时,分别施加木霉菌剂、根瘤菌菌剂以及木霉与根瘤菌复合菌剂,并采用离心分级法将处理后土壤分为4个粒径团聚体,即细黏粒(0.1~1μm)、粗黏粒(1~5gm)、粉粒(5~50μm)以及细砂粒(50~250μm),分析了植物域生物联合作用对不同粒径土壤中PAHs的去除效应。研究结果表明:紫花苜蓿一根瘤菌联合作用对PAHs污染土壤的修复效果最优,其降解率达60%以上。不同粒径组分中PAHs含量的分布表现为细砂粒〉粉粒〉粗黏粒〉细黏粒,且PAHs在不同粒径团聚体中去除率差异性较大。低环(2、3环)PAHs在各粒径组分中去除率较低(20%以下),并在不同粒径组分间呈非均衡分配状态;4环PAHs的去除主要集中在粉粒和细砂粒中,而5环PAHs的去除主要发生在细黏粒上。可见,PAHs在土壤不同粒径组分中分布特征及降解效应为进一步阐明PAHs污染土壤的生物修复机制提供了科学依据。 A pot experiment was conducted to explore the combined remediation of microorganisms (Trichoderma reesei and Rhizobium meliloti) and alfalfa stimulated the degradation of PAHs by rhizosphere microflora in different particle-size fractions of soil aggregates. Soil aggregates were partitioned into 4 particle-size fractions (clay: 0.1 - 1 μm, fine silt: 1 - 5 μm, silt: 5 - 50 μm and fine sand: 50 - 250μm) by using the method of centrifugation in five treatments. The results showed that the degradation rate of PAHs in soil treated with Rhizobiurn meliloti with alfalfa was 60%. The distribution of 16 PAHs concentrations in different soil particle size composition was in the order of fine sand 〉 silt 〉 fine sand 〉 clay, besides, low-molecular (2, 3-ring) PAHs was not degraded and but transferred in different size of particles (degradation rate less than 20%). The degradation of 4-ring PAHs occurred mainly on silt and fine sand soil particles and 5-ring PAHs degradation on the clay. Ilence, the distribution and degradation of PAils in different size of particles has a great significance on remediation ofPAHs polluted soil.
出处 《土壤》 CAS CSCD 北大核心 2015年第4期711-718,共8页 Soils
基金 国家自然科学基金项目(41230858 41271329)资助
关键词 多环芳烃 紫花苜蓿 木霉 根瘤菌 土壤团聚体 降解效应 Polycyclic aromatic hydrocarbons Alfalfa Trichoderma reesei Rhizobium meliloti Soil particles Degradation
  • 相关文献

参考文献22

  • 1Thorsen W A,Cope W G,Shea D.2004.Bioavailability of PAHs:effects of soot carbon and PAH source[J].Environmental Science and Technology,38:2029-2037.
  • 2Lake J L,Norwood C,Dimock C,Robert B.Origins of polycyclic aromatic hydrocarbons in Estuarine sediments[J].Geochim Cos mocim Acta,1997,43:1847-854.
  • 3尹春芹,蒋新,杨兴伦,卞永荣,王芳.施肥对花红苋菜吸收和积累土壤中PAHs的影响[J].中国环境科学,2008,28(8):742-747. 被引量:11
  • 4Harman GE.Overview of mechanisms and uses of Trichoderma spp.Phytopathlogy,2006,96(2):190-194.
  • 5TRIPATHI P,SINGH P,MISHRA A,PUNEET S,DWIVEDI S,BAIS T,TRIPATHI RD.Trichoderma:a potential bioremediator for environmental clean up[J].Clean Technologies and Environmental Policy,2013:1-10.
  • 6Ahmad D,Mehmannavaz R,Damaj M.Isolation and characterization of symbiotic N2-fixing Rhizobium meliloti from soils contaminated with aromatic and chloroaromatic hydrocarbons:PAHs and PCBs[J].International Biodeterioration and Biodegradation,1997,39:33-3.
  • 7Korade D L,Fulekar M H.Remediation of anthracene in my corrhizospheric soil using ryegrass[J].Environmental Science Technology,2008,2(9) :249-256.
  • 8刘魏魏,尹睿,林先贵,张晶,陈效民,李烜桢,杨婷.生物表面活性剂-微生物强化紫花苜蓿修复多环芳烃污染土壤[J].环境科学,2010,31(4):1079-1084. 被引量:28
  • 9Zheng Y,Luo XL,Zhang W,Wu B,Han F,Lin ZR,Wang XJ.Enrichment behavior and transport mechanism of soil-bound PAHs during rainfall-runoff events.Environmental Pollution,2012,171,85-92.
  • 10Tang ZY,Wu LH,Luo YM,Christie P.Size fractionation and characterization of nanocolloidal particles in soils.Environmental geochemistry and health .2009.31:1-10.

二级参考文献117

共引文献151

同被引文献251

引证文献12

二级引证文献112

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部