| 空心莲子草对污泥重金属的响应与吸附效应 |
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| 引用本文： | 林茂兹,邱雪芬,林能文,黄丽萍.空心莲子草对污泥重金属的响应与吸附效应[J].草业科学,2012,29(5):681-686. |
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| 作者姓名： | 林茂兹 邱雪芬 林能文 黄丽萍 |
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| 作者单位： | 福建师范大学福清分校生化系,福建福清350300 福建师范大学福清分校环境保护研究所,福建福清350300;福建省福清市环境保护局,福建福清,350300;福建师范大学福清分校生化系,福建福清,350300 |
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| 基金项目： | 国家自然科学基金，福建省自然科学基金，福建省教育厅项目 |
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| 摘 要： | 植物修复（Phytoremediation）是解决越来越突出的重金属污染问题的一种较好的方法，已成为生态学和环境学研究的重要课题,而植物对重金属的响应和吸附效应是该问题的科学基础。为此，本研究采用盆栽方法，设定污泥与沙壤土的不同体积配比（无污泥、5%污泥、10%污泥和20%污泥）作为生长基质，测定在含不同重金属的基质中生长不同时间（3-6月）的空心莲子草（Alternanthera philoxeroides）叶片的生理指标叶绿素含量、超氧化物歧化酶（SOD）活性、过氧化物酶（POD）活性]和在含重金属基质中生长6个月后的空心莲子草根、茎、叶中重金属元素（Cd、Cr、Mn、Ni、Pb、Cu、Zn）含量。结果表明，空心莲子草叶片中叶绿素含量总体上随生长基质中污泥体积比例升高而升高；空心莲子草叶片中SOD活性、POD活性总体随生长基质中污泥体积比例升高而升高，但在含重金属的生长基质中生长5个月后，叶绿素含量、SOD活性和POD活性均明显下降；在各处理下，空心莲子草对Mn、Ni、Cr、Pb、Cu和Zn的吸收主要分布在叶片，且空心莲子草的转运系数大于1。研究结果说明，空心莲子草对污泥重金属有较好的耐受性，且转运系数大于1。虽然该植物根、茎、叶的富集系数均小于1，不属于超富集植物，但在受重金属污染的土壤植物修复中仍有一定的参考作用。
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| 关 键 词： | 土壤污染 植物修复 生物积累 |
Response of Alternanthera philoxeroides to heavy metals and its sorption effectiveness for heavy metals |
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| LIN Mao-zi,QIU Xue-fen,LIN Neng-wen,HUANG Li-ping.Response of Alternanthera philoxeroides to heavy metals and its sorption effectiveness for heavy metals[J].Pratacultural Science,2012,29(5):681-686. |
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| Authors: | LIN Mao-zi QIU Xue-fen LIN Neng-wen HUANG Li-ping |
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| Institution: | 1(1.Department of Biological and Chemical Engineering,Fujian Normal university,Fuqing 350300,China; 2.Institute of Evironment Protection,Fujian Normal University,Fuqing 350300,China; 3.Fuqing Environment Protection Bureau of Fujian Province,Fuqing 350300,China) |
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| Abstract: | The phytoremediation is an effective way to solve more and more heavy metal problems and becomes an important field in ecological and environmental sciences,in which the response of plant to heavy metals and its sorption effectiveness for heavy metals are the scientific basis.A pot experiment with different ratio of sludge to soil(0,5%,10%,20% sludge) was carried out to determine the response of Alternanthera philoxeroides to heavy metals and its sorption effectiveness by measuring the chlorophyll content,peroxidase(POD) activity,and superoxidedis-mutase(SOD) in the leaves of A.philoxeroides after three,four,five and six months treatment,and the metals content(Cd,Cr,Mn,Ni,Pb,Cu,and Zn) in the leaves,roots,and stems of A.philoxeroides after six months treatment.This study showed that the chlorophyll content,POD and SOD activity in the leaves of A.philoxeroide increased as the sludge volume increased;however,they decreased when A.philoxeroide grew in the soil containing heavy metals for six months.This study also showed that the Mn,Ni,Cr,Pb,Cu,and Zn content of the leaves and the stems were higher than those of the roots in different treatments.These results indicated that although A.philoxeroides was useful for phytoremediation of heavy metals in sludge due to its good growth ability,strong tolerance to the heavy metals,and higher transfer coefficient for Mn,Ni,Cr,Pb,Cu,and Zn. |
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| Keywords: | soil pollution phytoremediation bioaccumulation |
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