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苜蓿对多环芳烃菲污染土壤的修复作用研究
引用本文:范淑秀,李培军,巩宗强,何娜,张利红,任婉侠,V.A.Verkhozina.苜蓿对多环芳烃菲污染土壤的修复作用研究[J].环境科学,2007,28(9):2080-2084.
作者姓名:范淑秀  李培军  巩宗强  何娜  张利红  任婉侠  V.A.Verkhozina
作者单位:1. 中国科学院沈阳应用生态研究所,沈阳,110016;中国科学院研究生院,北京,100049
2. 中国科学院沈阳应用生态研究所,沈阳,110016
3. 俄罗斯科学院西伯利亚分院闽诺格拉多夫地质化学研究所,伊尔库茨克,664033
基金项目:国家重点基础研究发展规划(973)项目(2004CB418506);国家自然科学重点基金项目(20337010)
摘    要:采用盆栽试验方法,研究了苜蓿(Medicago sativa L.)对多环芳烃菲污染土壤的修复作用.结果表明,多环芳烃菲对苜蓿的生长具有抑制作用,土壤中菲初始浓度越高抑制作用越明显.445.22 mg/kg条件下苜蓿茎叶和根的生物量最小,仅为无污染对照土壤的57.31%和31.20%.经过60 d的修复试验,苜蓿能够明显促进土壤中菲的降解.根际和非根际土壤中菲的去除率分别为85.68%~91.40%和75.25%~86.61%.同处理中根际土壤中菲残留浓度低于非根际土壤,而脱氢酶活性高于非根际土壤.无论是在非根际还是根际土壤中随着菲初始浓度增大,菲降解率和脱氢酶活性降低.脱氢酶活性与降解率的关系表明,脱氢酶活性与菲降解率显著正相关.所以植物根系的存在能够有效促进土壤中多环芳烃菲的降解.

关 键 词:苜蓿  植物修复  多环芳烃    污染土壤
文章编号:0250-3301(2007)09-2080-05
收稿时间:2006/10/30 0:00:00
修稿时间:2006-10-302006-12-20

Study on Phytoremediation of Phenanthrene-Contaminated Soil with Alfalfa (Medicago sativa L.)
FAN Shu-xiu,LI Pei-jun,GONG Zong-qiang,HE N,ZHANG Li-hong,REN Wan-xia and V.A.Verkhozina.Study on Phytoremediation of Phenanthrene-Contaminated Soil with Alfalfa (Medicago sativa L.)[J].Chinese Journal of Environmental Science,2007,28(9):2080-2084.
Authors:FAN Shu-xiu  LI Pei-jun  GONG Zong-qiang  HE N  ZHANG Li-hong  REN Wan-xia and VAVerkhozina
Institution:1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China ; 2. Graduate School of Chinese Academy of Sciences, Beijing 100049,China; 3.Institute of Geochemistry, A. P. Vinogradova Siberian Branch of Russian Academy of Sciences, Irkutsk 664033, Russia
Abstract:Pot experiment was used to investigate phytoremediation of phenanthrene-contaminated soil with alfalfa(Medicago sativa L.). Results indicated that phenanthrene had inhibitive effect on alfalfa growth, and higher phenanthrene concentration seriously prevent alfalfa growth. When the concentration was 445.22mg/kg, the shoot and root biomasses were only 57.31% and 31.20% of control respectively. Alfalfa significantly promoted phenanthrene degradation in the soil. After 60 days, 85.68%~91.40% and 75.25%~86.61% of spiked phenanthrene disappeared from the rhizosphere and non-rhizosphere soils respectively. And the average removal ratio of phenanthrene in rhizosphere soils was 6.33% higher than that in non-rhizoshpere soils. The residual concentration of phenanthrene in the rhizosphere was lower than that in the non-rhizosphere but the dehydrogenase activity was on the contrary. With phenanthrene concentration increase the removal ratio and dehydrogenase activity decreased. A positive correlation was observed between the soil dehydrogenase activity and the removal ratio of phenanthrene in both the rhizosphere and non-rhizosphere soils. Therefore the presence of alfalfa roots was effective in promating the phytoremediation of phenanthrene.
Keywords:alfalfa(Medicago sativa L  )  phytoremediation  PAHs  phenanthrene  contaminated soil
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