Phytoremediation of Rare Tailings-Contaminated Soil

Huang, Min; Liu, Zhongfan; Li, Xiang

doi:10.32604/jrm.2022.022393

Cited by 5 publications

(5 citation statements)

References 136 publications

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“…The National Certified Reference Materials of China (e.g., soils GBW 07405 and GBW 07407) were introduced for quantitative analysis of REEs, with recoveries ranging from 85% to 115%, and the relative standard deviations were ≤5% for all samples (Chen et al, 2021). Soil catalase, urease, and sucrase levels were determined by potassium permanganate titration, sodium phenol-sodium hypochlorite colorimetry, and 3, 5-dinitrosalicylic acid colorimetry, respectively (Guan, 1986;Rodríguez-Kábana & Truelove, 1982;Zantua & Bremner, 1975).…”

Section: Collection Of Plant and Soilmentioning

confidence: 99%

“…Some plants, known as hyperaccumulators, can transfer heavy metals from the soil to the aerial parts, which can accumulate 100-1000 times more than normal plants (Rascio & Navari-Izzo, 2011). Currently, most hyperaccumulators in REEs are ferns (Huang et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

“…These REE hyperaccumulators grow in degraded soils that are highly acidic and contain a small amount of phosphorus (Liu, Laird, et al, 2021), and have the ability to accumulate abnormally large amounts of REEs (Chen & Chen, 2020). P. massoniana, which has strong adaptability, grows quickly, and produces a high yield, is an important tree species for afforestation in barren mountains (Huang et al, 2022). Therefore, we propose a new co-cropping system (D. pedata and P. massoniana) for the uptake of REEs from soils in ion-adsorption rare earth mines in southern China.…”

Section: Introductionmentioning

confidence: 99%

“…Phytoextraction, a type of phytoremediation, involves the use of plants to accumulate, transport, and concentrate toxic heavy metals from the soil into their aerial parts (Salt et al, 1995). The key to phytoextraction is the identification of hyperaccumulators that have a high tolerance or capacity to accumulate heavy metals (Huang et al, 2022; Salt et al, 1995). Some plants, known as hyperaccumulators, can transfer heavy metals from the soil to the aerial parts, which can accumulate 100–1000 times more than normal plants (Rascio & Navari‐Izzo, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…P . massoniana , which has strong adaptability, grows quickly, and produces a high yield, is an important tree species for afforestation in barren mountains (Huang et al, 2022). Therefore, we propose a new co‐cropping system ( D .…”

Section: Introductionmentioning

confidence: 99%

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Rare‐earth element phytoextraction efficiency in southern Chinese mines under different clipping intensities using a co‐cropping system (Dicranopteris pedata and Pinus massoniana)

Chen,

Feng,

Lin

et al. 2024

Land Degrad Dev

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Our understanding of how varying clipping intensities affect the efficiency of phytoextraction remains limited, particularly with co‐cropping systems. This study focuses on assessing the effects of different clipping intensities on phytoextraction efficiency within co‐cropping systems dominated by the key species Dicranopteris pedata and Pinus massoniana in rare‐earth mines of southern China. Our results confirmed the following. Firstly, the compensation index, dry aboveground biomass, and rare‐earth elements (REE) accumulation of clipped D. pedata per unit area were highest under 100% clipping (p < 0.05). Meanwhile, the bioabsorption coefficient, bioconcentration factor, and translocation factor of P. massoniana were less than 1. Secondly, the soil catalase, sucrase, and α‐diversity indices of bacteria and fungi separately indicated no significant variation between the clipping treatments and control. The REE content in tree rings increased, and the total REE contents in thicker tree rings were higher than those in the thinner tree rings of P. massoniana from 1997 to 2016. Additionally, the soil erosion intensity diminished significantly in the growth area of P. massoniana from 1995 to 2019. Thirdly, both D. pedata and P. massoniana, when subjected to 100% clipping, could effectively remove excess REEs from the 0–20 cm soil layer within 18.57–61.19 years. In contrast, P. massoniana alone achieved a removal rate of excess REEs in the 20–60 cm layer, within 923.16–1899.62 years. Thus, D. pedata with 100% clipping can phytoextract the maximum amount of REEs. It is noted that P. massoniana cannot be used for REEs phytoextraction or phytostabilization. Co‐cropping with 100% clipping would have a less negative impact on growth and REEs extraction, and the co‐cropping system can phytoextract excess REEs from the surface soil within decades. However, it is not efficient for the phytoextraction of excess REEs from deep soil layers.

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