Remediation efficacy of Sedum plumbizincicola as affected by intercropping of landscape plants and oxalic acid in urban cadmium contaminated soil
Remediation efficacy of Sedum plumbizincicola as affected by intercropping of landscape plants and oxalic acid in urban cadmium contaminated soil
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景观植物间作与草酸对城市镉污染土壤景天修复效果的影响
DOI：
10.1007/s11368-019-02309-3
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发表时间：
2019-03
影响因子：
3.6
通讯作者：
Wang Hailong
中科院分区：
文献类型：
--
作者：
Hou Shuzhen;Wang Xin;Shafi Mohammad;Penttinen Petri;Xu Weijie;Ma Jiawei;Zhong Bin;Guo Jia;Xu Meizhen;Ye Zhengqian;Liu Dan;Wang Hailong
目的间作是一种很有前途的重金属污染土壤修复技术。有机酸可以增加土壤中重金属的有效性。我们的目的是评估草酸作为激活剂在高蓄积物-景观植物间作中对低成本有效修复污染土壤的效果。材料与方法以高蓄积性植物Sedum plumbizincicola为间作，选择禾草植物Oxalis corniculate、草花植物Calendula officinalis和灌木植物Buxus sinica。通过76 d盆栽试验，研究了11mmol kg−1草酸处理对景天-景观植物间作系统生长和Cd积累能力的影响。结果与讨论草酸提高了土壤中镉的有效性。草酸处理后的景天、酢浆草和酢浆草的生物量均高于未处理的生物量。草酸处理下金盏花生物量、叶绿素含量和过氧化氢酶含量均低于未处理时，表明Cd有效性增强导致胁迫严重。草酸处理下金盏花和黄杨的丙二醛含量较高，表明Cd有效性升高导致膜损伤。在草酸处理下，金盏花和黄杨的游离脯氨酸含量较高。草酸处理的景天植物Cd含量高于未施用草酸的低Cd景观植物。结论草酸对雨景草-草草间作和雨景草-黄杨间作的修复效果有积极影响。草酸提高了高蓄积物-景观植物间作的修复效率，为城市低镉污染土壤的修复提供了一种新的、有用的、实用的技术。
PurposeIntercropping is a promising technique for remediation of soils contaminated with heavy metals. Organic acids can increase the availability of heavy metals in soil. Our aim was to assess the effect of oxalic acid as an activator for hyperaccumulator–landscape plant intercropping to efficiently restore contaminated soil with low cost.Materials and methodsThe hyperaccumulator plant (Sedum plumbizincicola) was intercropped with selected landscape plants: Oxalis corniculate (ground cover plant), Calendula officinalis (grass flower plant), and Buxus sinica (shrub). The effects of 11 mmol kg−1 oxalic acid treatment on growth and Cd accumulation capacity of Sedum plumbizincicola–landscape plants intercropping systems were evaluated in a 76-day pot experiment.Results and discussionOxalic acid has increased the availability of Cd in soil. The biomass of Sedum, Oxalis, and Buxus plants was higher in treatment of oxalic acid than without oxalic acid. The biomass, chlorophyll, and catalase contents of Calendula were lower in treatment of oxalic acid than without oxalic acid, which indicated severe stress caused by enhanced availability of Cd. The malondialdehyde contents of Calendula and Buxus were higher in treatment of oxalic acid, which indicates that higher Cd availability has resulted damage of membrane. The free proline contents of Calendula and Buxus were higher in treatment of oxalic acid. The Cd content of Sedum plants was higher in treatment of oxalic acid than lower Cd in landscape plants with no application of oxalic acid.ConclusionsIt is concluded that oxalic acid has a positive effect on remediation efficiency of Sedum plumbizincicola-Oxalis and Sedum plumbizincicola-Buxus intercropping systems. Oxalic acid has enhanced remediation efficiency of hyperaccumulator-landscape plants intercropping which has offered a new, useful and practical technique for remediation of urban soils with low-level Cd contamination.
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影响因子：
2.1
作者：
Song Li;Ying Wang;Q. Mahmood;Jun-ren Chen;Jia-sen Wu;Zhengqian Ye;D. Peng;W. Yan;Kou-ping Lu-Kou-pi
通讯作者：
Song Li;Ying Wang;Q. Mahmood;Jun-ren Chen;Jia-sen Wu;Zhengqian Ye;D. Peng;W. Yan;Kou-ping Lu-Kou-pi
影响因子：
--
作者：
D. Jing
通讯作者：
D. Jing
DOI：
10.1016/j.scitotenv.2017.11.214
发表时间：
2018-04
期刊：
The Science of the total environment
影响因子：
--
作者：
Yilu Xu;B. Seshadri;B. Sarkar;Hailong Wang;C. Rumpel;D. Sparks;M. Farrell;Tony Hall;Xiaodong Yan
通讯作者：
Yilu Xu;B. Seshadri;B. Sarkar;Hailong Wang;C. Rumpel;D. Sparks;M. Farrell;Tony Hall;Xiaodong Yan
影响因子：
1.6
作者：
Ian N. Balcom
通讯作者：
Ian N. Balcom
影响因子：
8.9
作者：
do Nascimento, CWA;Amarasiriwardena, D;Xing, BS
通讯作者：
Xing, BS