Recommended risk screening values for Cd in high geological background area of Guangxi, China

Xiao, Nai-Chuan; Wang, Fo-Peng; Tang, Lebin; Zhu, Liangliang; Song, Bo; Chen, Tongbin

doi:10.1007/s10661-022-09802-2

Cited by 8 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, due to the large differences in the soil environmental quality of farmland in China and the different accumulation factors of soil Cd under anthropogenic pollution or natural activities [18,77,78], there are many differences in the results of soil evaluations and agricultural product evaluations in actual soil quality evaluation processes. Especially in the high geological background areas of northwestern Guizhou, China, there were many situations where the unsuitable evaluation results such as 'soil heavy metal(loid)s exceed the standard, but heavy metals in agricultural products did not exceed the standard' or 'heavy metals in agricultural products exceed the standard, but soil heavy metal(loid)s did not exceed the standard' [21,39,79]. The results of this study also strongly confirm that the current Chinese Environmental Quality Standards are not fully applicable in northwestern Guizhou Province, where the Cd background value is high (Table 2).…”

Section: Discussionmentioning

confidence: 99%

Study on Safe Usage of Agricultural Land in Typical Karst Areas Based on Cd in Soil and Maize: A Case Study of Northwestern Guizhou, China

Yang

2022

Agriculture

View full text Add to dashboard Cite

Cadmium (Cd) is an unnecessary dietary toxin that is harmful to human health. The Cd translocation in soil-crops system varies greatly depending on different soil matrices; therefore, a valuable method that could accurately evaluate soil Cd thresholds needs to be proposed immediately. In the southwestern part of China, a typical karst mountainous area of east Asia, the results of our survey of 492 soil-maize samples in the region showed high Cd accumulation in the soil, with concentrations ranging from 0.07 to 31.95 mg kg−1. The Cd concentrations in maize kernels planted in those fields, however, were quite low, and only 4 samples exceeded the national standard. A comparative study with nonkarst areas revealed a low bioaccumulation factor for soil Cd. This may be interpreted as the weathering soil-forming process of mineral-bearing rock systems, leading to high accumulation as well as low bioavailability of Cd in karst soils. A total of 172 soil-maize samples were evaluated inaccurately by the national standard evaluation procedure, accounting for 34.96% of the total. Therefore, we proposed the species sensitivity distribution model to address this inaccurate assessment. The results show that the hazardous concentrations of 95% and 5% in maize fields were 2.2 and 85.1 mg kg−1 for soil pH ≤ 5.5, 2.5 and 108.5 mg kg−1 for 5.5 < pH ≤ 6.5, and 3.0 and 161.8 mg kg−1 for 6.5 < pH ≤ 7.5, respectively. The total number of unsuitable samples according to the evaluation results decreased from 172 to 2 after modification. Therefore, this result could be considered a more accurate assessment threshold.

show abstract

Section: Discussionmentioning

confidence: 99%

Study on Safe Usage of Agricultural Land in Typical Karst Areas Based on Cd in Soil and Maize: A Case Study of Northwestern Guizhou, China

Yang

2022

Agriculture

View full text Add to dashboard Cite

show abstract

“…Peixoto et al investigated the daily consumption of chocolate beverage powder for Brazilian children and found that 4–35% of the weekly tolerable temporary intake of Cd could be contributed to chocolate-related dietary exposure [ 15 ]. In China, Cd contamination in rice is also a concerning problem of food safety [ 16 ]; as well, the average monthly dietary exposure of Cd to Chinese residents is 9.9 μg/kg bw, while southern Chinese might be confronted with a higher Cd exposure level [ 17 ]. Thus, Chinese residents must reduce Cd intake from other food sources as much as possible.…”

Section: Introductionmentioning

confidence: 99%

Fast Detection of Cadmium in Chocolate by Solid Sampling Electrothermal Vaporization Atomic Absorption Spectrometry and Its Application on Dietary Exposure Risk Assessment

Jia

Lan

et al. 2022

Molecules

View full text Add to dashboard Cite

In this work, a rapid detection method using solid sampling electrothermal vaporization atomic absorption spectrometry (SS-ETV-AAS) was established for cadmium in chocolate. The instrumental system includes a solid sampling ETV unit, a catalytic pyrolysis furnace, an AAS detector, and a gas supply system with only an air pump and a hydrogen generator. Herein, MgO material with 1.0–1.5 mm particle size was first employed to replace the kaolin filler previously used to further shorten the peak width and to thereby improve the sensitivity. With 350 mL/min of air, a chocolate sample was heated for 25 s from 435 to 464 °C to remove water and organic matrices; then, after supplying 240 mL/min hydrogen and turning down air to 120 mL/min, a N2/H2 mixture gas was formed to accelerate Cd vaporization from chocolate residue under 465 to 765 °C. Under the optimized conditions, the detection limit (LOD) was obviously lowered to 70 pg/g (vs. previous 150 pg/g) with R2 > 0.999; the relative standard deviations (RSD) of repeated measurements for real chocolate samples ranged from 1.5% to 6.4%, indicating a favorable precision; and the Cd recoveries were in the range of 93–107%, proving a satisfied accuracy. Thus, the total analysis time is less than 3 min without the sample digestion process. Thereafter, 78 chocolate samples with different brands from 9 producing countries in China market were collected and measured by this proposed method. Based on the measured Cd concentrations, a dietary exposure assessment was performed for Chinese residents, and the target hazard quotient (THQ) values are all less than 1, proving no significant health risk from intaking chocolate cadmium for Chinese residents.

show abstract

Bioaccessibility of arsenic, lead, and cadmium in contaminated mining/smelting soils: Assessment, modeling, and application for soil environment criteria derivation

Xie

Xie²,

Liao³

et al. 2023

Journal of Hazardous Materials

View full text Add to dashboard Cite

Recommended risk screening values for Cd in high geological background area of Guangxi, China

Cited by 8 publications

References 42 publications

Study on Safe Usage of Agricultural Land in Typical Karst Areas Based on Cd in Soil and Maize: A Case Study of Northwestern Guizhou, China

Study on Safe Usage of Agricultural Land in Typical Karst Areas Based on Cd in Soil and Maize: A Case Study of Northwestern Guizhou, China

Fast Detection of Cadmium in Chocolate by Solid Sampling Electrothermal Vaporization Atomic Absorption Spectrometry and Its Application on Dietary Exposure Risk Assessment

Bioaccessibility of arsenic, lead, and cadmium in contaminated mining/smelting soils: Assessment, modeling, and application for soil environment criteria derivation

Contact Info

Product

Resources

About