Remediation efficacy of Sedum plumbizincicola as affected by intercropping of landscape plants and oxalic acid in urban cadmium contaminated soil

Hou, Shu-Min; Wang, Xin; Shafi, Mohammad; Penttinen, Petri; Xu, Weizhou; Ma, Jing; Zhong, Beilong; Guo, Jia; Xu, Mengsi; Ye, Zhengqian; Liú, Dan; Wang, Hailong

doi:10.1007/s11368-019-02309-3

Cited by 14 publications

(8 citation statements)

References 36 publications

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“…Urban areas have become seriously contaminated zones by heavy metals derived from high density population and intensive industry within relatively limited space [1][2][3][4][5][6][7][8]. Heavy metal (HMs) contamination is commonly associated with the rapid development of urbanization, industrialization, manufacturing and mining, which pose an increasing threat to human health and eventually destroying the sustainable development of ecological environment [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, ornamental plants, especially flowering plants, are an important part of urban forests, which are planted across all urban areas for enhancing the visual and aesthetic quality of the architectural environments, tolerating the stress of copper (Cu), deicing reagents and drought stress, improving the air quality and fungal disease management, remediating the pollution of on-site greywater, eutrophication, ozone, VOCs, lead (Pb), tin (Sn) and petroleum hydrocarbons [59][60][61][62][63][64][65][66][67][68][69]. Ornamental plants are a more viable choice with high diversity and abundance [1,6]. Therefore, it could be predicted that HMs phytoremediation through flowering plants will bring more economic, environmental and social benefits to human living [18,51].…”

Section: Introductionmentioning

confidence: 99%

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Cadmium Uptake and Growth Responses of Seven Urban Flowering Plants: Hyperaccumulator or Bioindicator?

et al. 2022

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The application of flowering plants is the basis of urban forest construction. A newly-found flowering hyperaccumulator is crucial for remediating urban contaminated soil sustainably by cadmium (Cd). This study evaluated growth responses, Cd uptake and bioaccumulation characteristics of seven urban flowering plants. Based on growth responses of these plants, Calendula officinalis L. showed high tolerance to at least 100 mg kg−1 Cd, in terms of significant increase in biomass and with no obvious changes in height. After 60 d exposure to 100 mg kg−1 Cd, the accumulated Cd in shoots of the plant reached 279.51 ± 13.67 μg g−1 DW, which is above the critical value defined for a hyperaccumulator (100 μg g−1 DW for Cd). Meanwhile, the plant could accumulate Cd to as much as 926.68 ± 29.11 μg g−1 DW in root and 1206.19 ± 23.06 μg g−1 DW in plant, and had higher Cd uptake and bioaccumulation values. According to these traits, it is shown that Calendula officinalis L. can become a potential Cd-hyperaccumulator for phytoremediation. By contrast, Dianthus caryophyllus L. is very sensitive to Cd stress in terms of significantly decreased biomass, height and Cd uptake, indicating the plant is considered as a Cd-bioindicator.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cadmium Uptake and Growth Responses of Seven Urban Flowering Plants: Hyperaccumulator or Bioindicator?

et al. 2022

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“…The yield of each co-pyrolysis biochar was computed using Eq. (1). The pH of co-pyrolysis biochar was determined at a solid-to-liquid (w:v) ratio 1:20, and measured with a Mettler-Toledo SevenMulti dual pH/conductivity meter.…”

Section: Sample Analysismentioning

confidence: 99%

“…Cd(OH) 2 , CdCO 3 , etc.) through surface adsorption, precipitation reaction and increasing soil pH value, so as to hinder the absorption and transportation of cadmium by Chinese cabbage [1]. Additionally, co-pyrolysis biochar application could improve the rhizosphere soil environment and promote the stress resistance of Chinese cabbage [48].…”

Section: Effects Of Co-pyrolysis Biochar On Cadmium Uptake By Plants ...mentioning

confidence: 99%

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Bioavailability and speciation of Cadmium in contaminated paddy soil as alleviated by biochar from co-pyrolysis of peanut shells and maize straw

Xiao

Hou

et al. 2022

Environ Sci Eur

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Background Biochar is an important material for remediation of Cd in contaminated paddy soils. However, different biochars have variable effects on bioavailability of Cd while single biochar cannot properly amend immobilized Cd. Co-production of biochar from peanut shells and maize straw at different mass mixing ratios (1:0, 1:1, 1:2, 1:3). The characteristics, properties and effects of co-pyrolysis biochars on amendments of Cd polluted paddy soil was evaluated. Results Our research revealed that yield, ash, elemental contents and specific surface area of co-pyrolysis biochars have variable amendment effects compared with single biochar. The co-pyrolysis biochars have produced rich oxygen-containing functional groups and crystal structure, especially 1P3M (co-pyrolysis biochar produced from peanut shell and maize straw in mass ratios of 1:3). The addition of biochar has significantly enhanced pH and EC value, however, content of available Cd during incubation was significantly reduced compared with control treatment. The efficiency of biochars have reduced available Cd in order of 1P3M > M > 1P1M > 1P2M > 2P1M > 3P1M > P after incubation. The 1P3M was most effective in reducing CaCl2-extractable Cd concentration up to 43.97%. The BCR sequential extraction method has produced lowest exchangeable fraction Cd content and highest residual fraction Cd content in 1P3M among all biochar amended treatments. Conclusions It is concluded that 1P3M has a much greater potential to decreased the bioavailability of Cd in contaminated paddy soil. And 1P3M was highly effective for transporting Cd from soluble form to less toxic stable forms in polluted paddy soils. Graphical Abstract

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Introducing sedum affects root‐soil interface phytoremediation of heavy metals in lei bamboo forest and potential risks from edible bamboo shoots

et al. 2023

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Introducing hyperaccumulators in bamboo forests is an efficient method for heavy metals (HMs) pollution control. HMs can be transferred from soil to bamboo and accumulate in edible bamboo shoots. However, how phytoremediation or cropping systems affect root‐soil interface and transference of HMs from soil to bamboo shoots is unknown. In this study, lei bamboo and Sedum plumbizincicola were planted as a monoculture and intercropping system (bamboo/sedum) on contaminated land. Soil properties, rhizosphere bacterial communities, and HMs concentrations in plants and soils were compared among bamboo in monoculture (B), bamboo in intercropping (BI), sedum in intercropping (SI), and sedum in monoculture (S). In BI, the total nitrogen was 10.8% lower, while total organic carbon (TOC) was 12.3% higher than in B; HMs removal amount in BI was higher than in B, especially cadmium. Intercropping increased the HMs concentrations, bioconcentration factor, translocation factor, and hazard quotient of bamboo shoots. Significant differences in bacterial community structures were confirmed by principal coordinate analysis. Gemmatimonadetes, Actinobacteria, Chloroflexi, and Kaistobacter were identified as biomarkers that increased significantly in intercropping, enhancing the diversity of ecological functions in the rhizosphere. Redundancy analysis revealed that rhizosphere bacterial communities were significantly correlated with soil properties, especially TOC and available phosphorus. Intercropping could remarkably alter soil chemical and microbiological properties and facilitate ecosystem restoration by enhancing soil TOC sequestration, activating rhizobacterial community at the root‐soil interface, and finally increasing HMs removal. As the consumption of bamboo shoots grown in contaminated soils may pose health risks, more attention is needed on this issue in phytoremediation studies.

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Remediation efficacy of Sedum plumbizincicola as affected by intercropping of landscape plants and oxalic acid in urban cadmium contaminated soil

Cited by 14 publications

References 36 publications

Cadmium Uptake and Growth Responses of Seven Urban Flowering Plants: Hyperaccumulator or Bioindicator?

Cadmium Uptake and Growth Responses of Seven Urban Flowering Plants: Hyperaccumulator or Bioindicator?

Bioavailability and speciation of Cadmium in contaminated paddy soil as alleviated by biochar from co-pyrolysis of peanut shells and maize straw

Introducing sedum affects root‐soil interface phytoremediation of heavy metals in lei bamboo forest and potential risks from edible bamboo shoots

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