濕生植物酸模對重金屬富集作用研究
發(fā)布時間:2018-05-24 22:00
本文選題:酸模 + 重金屬 ; 參考:《環(huán)境科學與技術(shù)》2016年11期
【摘要】:通過野外調(diào)查和室內(nèi)分析實驗,研究了宜昌城區(qū)10個污灌區(qū)自然生長的酸模(Rumex acetosa)和對應(yīng)根際土壤樣品中重金屬Pb、Cu、Cr含量及其理化性質(zhì)。結(jié)果表明,在宜昌城區(qū)的10個污灌區(qū)的酸模根部對重金屬Pb、Cu、Cr的富集能力大于莖和葉;氮磷含量較高的土壤吸附重金屬Cu的能力較強,在一定程度上保護了植物在重金屬Cu污染廢棄地的正常生長;土壤中Cu含量的增加,促進了Cu在酸模體內(nèi)從根部轉(zhuǎn)運到莖和葉,可以通過刈割收獲酸模地上部分處理重金屬Cu的場地污染;酸?梢宰鳛镃u污染場地的植物修復的備選物種。
[Abstract]:Through field investigation and laboratory analysis, the content and physicochemical properties of heavy metals Pb, Cu, Cr in the natural growth of 10 pollution irrigated areas of Yichang urban area and the corresponding rhizosphere soil samples were studied. The results showed that the enrichment ability of the heavy metal Pb, Cu, Cr in the 10 sewage irrigation areas of Yichang urban area was greater than that of the stems and leaves, and the nitrogen was higher than that of the stems and leaves; and the nitrogen content of the heavy metals was greater than that of the stems and leaves in the 10 pollution irrigated areas of the city of Yichang. The soil with high phosphorus content has a strong ability to adsorb heavy metal Cu, which protects the normal growth of plants in the waste land of heavy metal Cu pollution to some extent. The increase of Cu content in the soil promotes the transport of Cu from the roots to the stems and leaves in the body of the acid mold, and can be used to treat the site pollution of the heavy metal Cu through the upper part of the mowing and harvesting acid mold; It can be used as an alternative species for phytoremediation of Cu contaminated sites.
【作者單位】: 三峽地區(qū)地質(zhì)災(zāi)害與生態(tài)環(huán)境湖北省協(xié)同創(chuàng)新中心(三峽大學);三峽庫區(qū)生態(tài)環(huán)境教育部工程研究中心(三峽大學);湖北省環(huán)境科學研究院;
【基金】:國家水專項子課題(2012ZX07104-003-04) 科技惠民計劃項目(S2013GMD100042) 湖北省創(chuàng)新群體項目(2015CFA021)
【分類號】:X53;X173
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