Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Li, Leiming; Wu, Jun; Lü, Jian; Min, Xuehong; Xu, Juan; Yang, Long

doi:10.1016/j.ecoenv.2018.09.110

Cited by 74 publications

(57 citation statements)

References 54 publications

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“…The average environmentally available REE contents of the investigated soils ranged from 85 to 191 mg kg −1 ( Table 1). These values were similar to those reported for an area in China (average of 179 mg kg −1 ) that is far from large populations, urbanization, and industrialization [27]. In the five studied soil samples, we only observed LREE enrichment in A1 (tonalite bedrock), A2 (pyroxenite bedrock), and B1 (ferrocarbonatite bedrock).…”

Section: Unitssupporting

confidence: 89%

“…In addition, elements can display different biogeochemical behaviors in natural weathering environments, and therefore differences in individual REE distributions are common [28]. Cerium was the most concentrated REE in the investigated soils, which is consistent with its natural predominance in the environment [27,29]. Even though the REE contents of the plant tissues presented in this study exceeded the limit of detection (Table S1), they were rather low and should therefore be interpreted carefully.…”

Section: Unitssupporting

confidence: 73%

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Biogeochemical Cycle of Lanthanides in a Light Rare Earth Element-Enriched Geological Area (Quebec, Canada)

et al. 2019

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This work investigated a rare earth element (REE) natural biogeochemical cycle in an area with a light rare earth element (LREE)-rich ferrocarbonatite intrusion. An REE determination in this geological environment allowed us to trace REE natural transfers in order to better manage future REE mining exploitations. Our findings suggest that although REE concentrations in abiotic compartments (soil and freshwater systems) and biotic samples (terrestrial and aquatic plants) were low, the LREE fractionation observed in the parent material was maintained along compartments. Additionally, Nd anomalies observed in the sediment pore water suggest a potential different biogeochemical cycle of this element in aquatic systems. According to the potential bioaccumulation of REEs in the organisms of two studied plants belonging to terrestrial and aquatic compartments, Equisetum arvense L. and Typha latifolia L. (respectively), we observed that REEs were not accumulated and that they showed limited REE transfer inside plants, but with an increased uptake of Eu relative to the other REEs. Our results indicated a low mobility and transfer of REEs from REE-rich bedrocks in a natural area toward terrestrial and freshwater systems, but also pointed to a dilution of the REE content in the different compartments, maintaining the LREE fractionation. Our findings provide new knowledge about the REE biochemical cycle in a natural area (from rocks to plants) and represent a starting point for an environmentally friendly exploitation of future REE mining areas.

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Section: Unitssupporting

confidence: 89%

Section: Unitssupporting

confidence: 73%

Biogeochemical Cycle of Lanthanides in a Light Rare Earth Element-Enriched Geological Area (Quebec, Canada)

et al. 2019

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“…Based on a RI ranking criterion [17], thus far all the samples exhibited low ecological risk. Because of river transport and sedimentation, the elemental concentration in the sediments was diluted compared to that in soils as reported by Wu et al [26] and Li et al [37], whose results showed high potential and considerable ecological and health risks near our research area. Moreover, Wang [68] also found low ecological risk and increasing trend of RI in the Lake Qinghai, which is in the northeastern Qinghai-Tibet Plateau, as well as having more anthropogenic disturbances because of tourism.…”

Section: Pollution and Ecological Assessmentsupporting

confidence: 56%

“…For example, Wu et al [26] concluded that there was serious pollution in soils from the northeastern Qinghai-Tibet Plateau which exerted high potential ecological and health risks. Li et al [37] found that the soils in the salt-lake area presented considerable ecological risks in the northeastern Qinghai-Tibet Plateau. The environmental changes due to industrial mining activities of the salt lake and urbanization of the Golmud are still not well understood.…”

Section: Introductionmentioning

confidence: 99%

Distribution, Source Identification, and Assessment of Potentially Toxic Elements in the Sediment Core from the Estuarine Region of the Golmud River to the Qarhan Salt Lake, Qinghai, China

et al. 2019

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The Qarhan Salt Lake has attracted increasing attention due to its significant national economic status and increased human activity, especially mining. Therefore, a sediment core collected from the confluence of the Golmud River to the Qarhan Salt Lake was chosen to investigate the concentrations, pollution levels, and ecological assessment of nine targeted elements (Al, As, Cd, Cr, Cu, Ni, P, Pb, and Zn). The excess 210Pb activities were calculated and a sedimentation rate of approximately 0.041 cm/y was estimated. Elements sources were identified, and the results show that Al, As, Cu, Ni, Pb, and Zn were mainly from natural sources, Cd and P were mainly from human input, and Cr appeared to have both sources. For Cd and P there was an increasing trend from 1987 and 1975, respectively, coinciding with the Chinese economic reform, Qarhan Salt Lake development and utilization, and also with the gross domestic product of Haixi State, Qinghai Province. Though the pollution and ecological assessment showed that there was nil to very low contamination and ecological risk, which is different from previous assumptions, the obviously increasing trend of Cd and P in the surface is still a concern. More attention should be paid to Cd and P in the further development of the Qarhan Salt Lake and the Golmud City.

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“…Heavy metal contamination of soils coming from industry or agriculture, such as smelting industries, residues from nonferrous metal mining, pesticides, fertilizers, municipal composts, are among the major environmental challenges in the world [1][2][3][4][5][6]. Excessive metal concentrations in the contaminated soils can result in soil quality degradation, crop yield reduction, and poor quality of agriculture products [7].…”

Section: Introductionmentioning

confidence: 99%

Chemical speciation and bioavailability of cadmium and lead in the gray calcium soil

Yue

Zeng

Chen

2019

Environmental Pollutants and Bioavailability

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A pot experiment was conducted to study chemical speciations and bioavailability of cadmium (Cd) and lead (Pb) in the gray calcium soil from northwestern China, and accumulation and translocation of Cd and Pb in wheat (Triticum aestivum L.) grown on the soil was also studied. The results showed that significant changes of Cd and Pb fractions in the soil and Cd and Pb concentrations in the wheat were observed with increasing soil Cd and Pb concentrations, and both Cd and Pb in exchangebale fraction in the soil made the greatest contribution to the accumulation of Cd and Pb in the wheat. Higher bio-concentration factors (BCFs) and translocation factors (TFs) for Cd and lower BCFs and TFs for Pb were observed in the wheat, respectively, and Cd had much higher accumulation than Pb in the edible parts of the wheat. Therefore, Cd has higher risk than Pb when people eat the wheat.

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Distribution, pollution, bioaccumulation, and ecological risks of trace elements in soils of the northeastern Qinghai-Tibet Plateau

Cited by 74 publications

References 54 publications

Biogeochemical Cycle of Lanthanides in a Light Rare Earth Element-Enriched Geological Area (Quebec, Canada)

Biogeochemical Cycle of Lanthanides in a Light Rare Earth Element-Enriched Geological Area (Quebec, Canada)

Distribution, Source Identification, and Assessment of Potentially Toxic Elements in the Sediment Core from the Estuarine Region of the Golmud River to the Qarhan Salt Lake, Qinghai, China

Chemical speciation and bioavailability of cadmium and lead in the gray calcium soil

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