Spatial distribution and main controlling factor of cadmium accumulation in agricultural soils in Guizhou, China

Zhang, Yunxia; Wu, Yong; Song, Bo; Zhou, Lang; Wang, Fo-Peng; Pang, Rui

doi:10.1016/j.jhazmat.2021.127308

Cited by 26 publications

(7 citation statements)

References 45 publications

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“…The crops irrigated using wastewater were characterized by high concentrations of heavy metals [ 32 , 33 ]. It has been reported that the altitude influences the distribution of heavy metals in the soil, which therefore affects the absorption of heavy metals by crops [ 34 , 35 ]. In addition, it was possible that the pollution of heavy metals in coix seeds was related to rainfall, atmospheric deposition and stomata on leaves [ 36 ].…”

Section: Resultsmentioning

confidence: 99%

Safety Evaluation of Heavy Metal Contamination and Pesticide Residues in Coix Seeds in Guizhou Province, China

Wang

Yao

et al. 2022

Foods

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The coix seed is a medicinal and edible plant with rich nutritional and medicinal values. With the expansion of the coix seed consumption market, the problem of coix seed safety has attracted attention worldwide. The aims of this work were to evaluate the contamination of mercury (Hg), lead (Pb), cadmium (Cd), arsenic (As), chromium (Cr) and 116 pesticides in coix seeds collected from 12 main producing regions of coix seeds in the Guizhou Province of China and to analyze the major contributors of heavy metal and pesticide contamination in coix seed. The results show that the average contents of Pb, Cd, As and Cr in the 123 coix seed samples were 0.0069, 0.0021, 0.0138 and 0.1107 mg/kg, respectively, while Hg was not detected in all coix seed samples. Among the five heavy metals detected, only the Cr contents of three samples were found to be higher than the contaminant limit of Chinese standard GB2762-2017 (CSGB). A total of 13 pesticides were detected in 29 samples from seven main production regions of coix seeds, accounting for 23.6% of all the samples. The detection rates of chlorpyrifos were the highest (8.13%), followed by fenpropathrin (4.06%), bifenthrin (2.43%) and phoxim (1.62%), while the detection rates of the remaining pesticides were below 1%. Moreover, the residual risk score of dichlorvos was the highest of all the pesticides detected. The pollution index and risk assessment of heavy metals and pesticide residues indicates that coix seeds were at safe levels for consumption. In the production process of coix seeds, the local government should control the soil in areas heavily polluted by heavy metals and strengthen the monitoring and guidance on the scientific and rational use of pesticides.

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Section: Resultsmentioning

confidence: 99%

Safety Evaluation of Heavy Metal Contamination and Pesticide Residues in Coix Seeds in Guizhou Province, China

Wang

Yao

et al. 2022

Foods

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“…Li et al reported that tea gardens are open systems that are easily affected by a number of natural factors and human activities, and that heavy metal sources from tea garden soil, air pollution, pesticides, and fertilizers can enhance the risk of toxic metal pollution. 22 Another issue is that the Western and Southern areas of China have more toxic metal pollution in soils compared with the Eastern and Northern areas 23 due to the increased mining activities in the Western and Southern areas. 24 Therefore, an appropriate health response to toxic metals in tea, and especially relevant standards including maximum exposure limits and standards for metal tolerance, is urgently needed in the Southern and Western areas of China.…”

Section: Discussionmentioning

confidence: 99%

Toxic Metal Detection in Various Types of Tea from Certain Regions of China: Spatial Pollution Characteristics and Potential Health Risk Assessment

Guo

Liu

Miszczyk

et al. 2023

ACS Earth Space Chem.

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Tea is one of the most popular beverages in the world, but toxic metals in tea could threaten human health. The toxic metal pollution status of tea in China at a national level remains unclear. Here, we detected the cadmium (Cd) and arsenic (As) concentrations of tea collected from 22 provinces in China. The major points are the following: (1) average concentrations of Cd and As of tea samples in China were 1.163 and 0.485 mg/kg, respectively; the Cd but not As levels exceeded the standards from the Ministry of Agriculture of the People’s Republic of China (NY 659-2003). Cd and As average concentrations were higher in the Southern and Western regions at 5.730, 0.071 and 0.510, 0.580 mg/kg, respectively, compared with the Eastern and Northern regions at 0.203, 0.040 and 0.455, 0.463, respectively. The concentration of Cd was highest in kuding tea at 21.98 mg/kg, whereas the As concentration was highest in jasmine tea at 0.76 mg/kg. (2) The health risk assessment yielded target hazard quotients for Cd and As of 0.1989 and 0.1432, respectively. The total hazard index was 0.3421, and the cancer risk was 8.949 × 10–4. (3) The principal component analysis revealed higher Cd pollution in the Western and Southern areas, which may be related to mining activities. This is the first national-scale investigation of the toxic metals Cd and As in tea across China. Our findings provide a useful reference for ensuring the quality and safety of tea production and suggest the need for constant monitoring of toxic metals in tea to limit the risk of exceeding permitted limits.

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“…Soil pollution by Cd causes serious environmental problems, mainly in acidic soils that favor Cd fixation by plants, or soils vulnerable to acidification and with a shallow water table. More specifically, the presence of high Cd contents in many agricultural soils worldwide, as a consequence of irrigation with contaminated wastewater from industrial or mining discharges, has generated significant crop losses and severe health problems for humans [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Use of Three Different Nanoparticles to Reduce Cd Availability in Soils: Effects on Germination and Early Growth of Sinapis alba L.

González-Feijoo

Rodríguez-Seijo

Fernández‐Calviño

et al. 2023

Plants

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Globally, cadmium (Cd) is one of the metals that causes the most significant problems of contamination in agricultural soils and toxicity in living organisms. In this study, the ability of three different nanoparticles (dose 3% w/w) (hydroxyapatite (HANPs), maghemite (MNPs), or zero-valent iron (FeNPs)) to decrease the availability of Cd in artificially contaminated agricultural soil was investigated. The effect of Cd and nanoparticles on germination and early growth of Sinapis alba L. was also assessed by tolerance/toxicity bioassays. The available Cd contents in the contaminated soil decreased after treatment with the nanoparticles (available Cd decreased with HANPs: >96.9%, MNPs: >91.9%, FeNPs: >94%), indicating that these nanoparticles are highly efficient for the fixation of available Cd. The toxicity/tolerance bioassays showed different behavior for each nanoparticle. The HANPs negatively affected germination (G(%): 20% worsening compared to control soil), early root growth (Gindex: −27.7% compared to control soil), and aerial parts (Apindex: −12%) of S. alba, but showed positive effects compared to Cd-contaminated soils (Gindex: +8–11%; Apindex: +26–47%). MNP treatment in Cd-contaminated soils had a positive effect on germination (G(%): 6–10% improvement) and early growth of roots (Gindex: +16%) and aerial parts (Apindex: +16–19%). The FeNPs had a positive influence on germination (G(%): +10%) and growth of aerial parts (Apindex: +12–16%) but not on early growth of roots (Gindex: 0%). These nanoparticles can be used to reduce highly available Cd contents in contaminated soils, but MNPs and FeNPs showed the most favorable effects on the early growth and germination of S. alba.

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Spatial distribution and main controlling factor of cadmium accumulation in agricultural soils in Guizhou, China

Cited by 26 publications

References 45 publications

Safety Evaluation of Heavy Metal Contamination and Pesticide Residues in Coix Seeds in Guizhou Province, China

Safety Evaluation of Heavy Metal Contamination and Pesticide Residues in Coix Seeds in Guizhou Province, China

Toxic Metal Detection in Various Types of Tea from Certain Regions of China: Spatial Pollution Characteristics and Potential Health Risk Assessment

Use of Three Different Nanoparticles to Reduce Cd Availability in Soils: Effects on Germination and Early Growth of Sinapis alba L.

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