玉米对土壤中菲芘修复作用的初步研究
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* 中国科学院南京土壤研究所开放基金(035116);浙江省教育厅项目(20040187)和国家“863”项目(2002AA649200)资助


REMEDIATION OF PHENANTHRENE AND PYRENE-CONTAMINATED SOIL BY GROWING MAIZE(ZEA MAYS L.)
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    摘要:

    采用系列浓度菲芘进行盆栽试验,研究玉米对污染土壤菲芘的去除效果与累积机理。结果显示,玉米对菲芘的去除效果明显,60d试验完成后,玉米生长的土壤中平均大约有69.8%~91.2%的菲与77.0%~88.4%的芘被去除,平均去除率分别比对照1(加叠氮化钠)高63.6%和72.3%;比对照2(无叠氮化钠)高15.1%与38.2%。玉米能明显地吸收与累积污染土壤中菲和芘,并随土壤菲芘含量的增加而增大。生物富集因子(BCFs)随着土壤菲芘含量的增加而减小,芘的生物富集因子大于菲,不同种类多环芳烃以及植物不同部位间BCFs差异较大,菲的叶片BCFs(0.79~2.45)大于茎(0.17~1.76),根BCFs(0.42~1.21)最小,芘处理时叶片和茎的BCFs分别是1.03~3.31与0.2~2.17,明显低于根BCFs(2.07~6.40)。玉米能够在高浓度多环芳烃污染土壤中正常生长,并且能累积与去除污染土壤中的菲和芘,表明用玉米修复多环芳烃污染土壤是一种可行的方法。

    Abstract:

    A study was carried out to investigate mechanisms of the removal and accumulation of phenanthrene and pyrene by Zea Mays L. Pot experiment was conducted with a series of concentrations of phenanthrene and pyrene in a greenhouse. The results showed that maize significantly removed phenanthrene and pyrene from soils. At the end of the 60-day experiment, the extractable phenanthrene and pyrene were lower in planted soil than in non-planted soil. About 69.76%~91.16% of phenan-threne and 76.97%~88.37% of pyrene were removed from the soils, respectively. As compared to control 1 (with addition of NaN3), maize removed on average 63.56% of phenanthrene and 72.27% of pyrene from the soils and relative to control 2 (without NaN3), 15.13% of phenanthrene and 38.15% of pyrene were removed. Maize did take up PAHs from the soils, and generally the higher the concentration of PAH in soil, the more maize took up. Bioconcentration factors (BCFs) for phenanthrene and pyrene tended to decrease with increasing concentrations of the contaminants in soil, and the BCFs for pyrene were large than those for phenanthrene. The BCFs for phenanthrene in shoots were 0.79~2.45 (leaves) and 0.17~1.76 (stems), higher than in roots (0.42~1.21) in the same treatment. However, the BCFs for pyrene in shoots were 1.03~3.31 (leaves) and 0.2~2.17 (stems), much lower than in roots (2.07~6.40). Maize can grow in soils higher in PAHs, and accumulate phenanthrene and pyrene. The results indicate that removal of PAHs from contaminated soils by Zea mays L may be a feasible approach to remediation of the soils.

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徐圣友,陈英旭,林琦,吴伟祥,王冬,薛生国,沈超峰.玉米对土壤中菲芘修复作用的初步研究[J].土壤学报,2006,43(2):226-232. DOI:10.11766/trxb200501040209 Xu Shengyou, Chen Yingxu, Lin Qi, Wu Weixiang, Wang Dong, Xue Shengguo, Shen Chaofeng. REMEDIATION OF PHENANTHRENE AND PYRENE-CONTAMINATED SOIL BY GROWING MAIZE(ZEA MAYS L.)[J]. Acta Pedologica Sinica,2006,43(2):226-232.

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  • 收稿日期:2005-01-04
  • 最后修改日期:2005-08-03
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  • 在线发布日期: 2013-02-25
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