Distribution and modelling of rare earth elements in Chinese river sediments

Zhu, Wangzhao; Kennedy, Maria D.; Leer, E. W. B. De; Zhou, Hang; Alaerts, Guy J.

doi:10.1016/s0048-9697(97)00172-1

Cited by 51 publications

(21 citation statements)

References 25 publications

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“…1 that the order of the concentrations of REE in APM in Beijing was as follows: Ce > La>Nd>Y>Pr>Sm>Gd>Dy>Er>Yb>Eu>Tb>-Ho>Tm>Lu, showing only small fluctuations after Pr for these three sampling sites. The sequence was similar to that in Delft, the Netherlands, determined in 1997 (Wang et al, 2000), and similar to the order of REE in the sediments (Zhu et al, 1997), animal, plant, environmental and geological samples Zhong and Min, 1995).…”

Section: Resultssupporting

confidence: 84%

Comparative studies on the concentration of rare earth elements and heavy metals in the atmospheric particulate matter in Beijing, China, and in Delft, the Netherlands

Wang¹,

Zhu²,

An³

et al. 2001

Environment International

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Atmospheric particulate matter (APM) was collected at three sampling sites in Beijing, China, from February to June 1998. The concentrations of rare earth elements (REE) and cobalt (Co), zinc (Zn), copper (Cu), cadmium (Cd) and lead (Pb) in the APM were determined by inductively coupled plasma mass spectrometry (ICP-MS). The results obtained in Beijing, China, were compared to that obtained in Delft, the Netherlands, in 1997. The influence of coal combustion was considered. The results demonstrated that the content of APM, the concentrations of REE and Co, Zn, Cd, Pb in the APM in Beijing, China, were higher than that in Delft, the Netherlands. From the ratios of La to Ce, and La to Sm, which may be used as tracers for the origin of the REE, it is concluded that the origins of REE in China differ from those in the Netherlands. D

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Section: Resultssupporting

confidence: 84%

Comparative studies on the concentration of rare earth elements and heavy metals in the atmospheric particulate matter in Beijing, China, and in Delft, the Netherlands

Wang¹,

Zhu²,

An³

et al. 2001

Environment International

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“…The sequence was similar to that in Bayan Obo ores, determined in 2012 (Xu et al 2012), and similar to the order of REEs in the sediments (Zhu et al 1997), animal, plant, environmental, and geological samples (Wang et al 1995). The concentrations of LREEs accounted for the main part with 83~95 % of the total, while cerium accounted for 48 %.…”

Section: Descriptive Statistics Of Ree Concentrations In Soilssupporting

confidence: 79%

Anomalous abundance and redistribution patterns of rare earth elements in soils of a mining area in Inner Mongolia, China

Wang

Liang

2016

Environ Sci Pollut Res

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The Bayan Obo Mine, the largest rare earth element (REE) deposit ever found in the world, has been mined for nearly 60 years for iron and rare earth elements. To assess the influences of mining activities on geochemical behavior of REEs in soils, 27 surface soil samples and three soil profile samples were collected from different directions in the vicinity of the mine area. The total concentrations of REEs in surface soils varied from 149.75 to 18,891.81 mg kg −1 with an average value of 1906.12 mg kg, which was apparently higher than the average values in China (181 mg kg). The order of the average concentrations of individual REEs in surface soils was similar to that in Bayan Obo ores, which confirmed that the concentration and distribution of REEs in the soils was influenced by the mining activities. The concentrations of single REE in the soil profiles showed a similar trend with depth with an increase at 0-25 cm section, then decreased and remained relatively stable in the deep part. The normalized curves inclined to the right side, showing the conspicuous fractionation between the light and heavy REEs, which supported by the North American Shale Composite (NASC) and Post-Archean Australian Shale (PAAS) normalized concentration ratios calculated for selected elements (La N /Yb N , La N / Sm N , Gd N /Yb N ). Slight positive Ce anomaly and negative Eu anomaly were also observed.

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“…On the other hand, literature information on the environmental eects, bioaccumulation and bioavailability of REEs has received scant attention until very recent years. Starting from the late 1990s, increasing eort has been directed to the environmental eects of REEs, and some of the recent reports include the study of REE accumulation in plant (Ichihashi et al, 1992), soil (Wyttenbach et al, 1998), sediment (Zhu et al, 1997) and biological samples (Tu et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Speciation of rare earth elements in soil and accumulation by wheat with rare earth fertilizer application

Zhang

Shan

2001

Environmental Pollution

177

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apsule'': Rare earth elements increased wheat yields and accumulated in plants in relation to concentrations in fertilizers. AbstractA greenhouse study was conducted to investigate the accumulation of rare earth elements (REEs), La, Ce, Pr and Nd, in winter wheat (Triticum aestivum L.), and the speciation of these elements in soil following the application of REE-based fertilizers. Improved crop yield was con®rmed by the experiment. The accumulation behavior of La, Ce, Pr and Nd in wheat varied depending on the concentration of REE fertilizer application, i.e. increased with increasing REE concentration at low fertilization application, constant over the medium REE range, and decreased with increasing REE concentration at high fertilizer application. Signi®cant negative correlation was obtained between REE contents in roots and soil pH (r=À0.5787 to À0.8442 for La). REEs in both the fertilized and unfertilized soils were fractionated by a three-stage sequential extraction procedure into three chemically distinct fractions: water soluble, exchangeable and carbonate bound (B1), Fe±Mn oxide bound (B2), and organic and sul®de bound (B3). REEs in fertilized soils were found mainly in the B2 and B3 fractions, with only a small amount in the B1 fraction. REEs in B1 and B2 fractions were negatively correlated with soil pH (r=À0.6892 to À0.8927 and À0.7462 to À0.9482). Signi®cant correlation was obtained between REEs in B1 fraction and REE contents in root. The correlation coecients ranged from 0.6159 to 0.7410 when fertilizer application was lower than 20.0 mg/kg soil. No acceptable relationship was observed between REE contents in shoot and any of the extractable fractions in soils. #

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Distribution and modelling of rare earth elements in Chinese river sediments

Cited by 51 publications

References 25 publications

Comparative studies on the concentration of rare earth elements and heavy metals in the atmospheric particulate matter in Beijing, China, and in Delft, the Netherlands

Comparative studies on the concentration of rare earth elements and heavy metals in the atmospheric particulate matter in Beijing, China, and in Delft, the Netherlands

Anomalous abundance and redistribution patterns of rare earth elements in soils of a mining area in Inner Mongolia, China

Speciation of rare earth elements in soil and accumulation by wheat with rare earth fertilizer application

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