Speciation and accumulation pattern of heavy metals from soil to rice at different growth stages in farmland of southwestern China

Zhang, Zhenming; Wu, Xianliang; Wu, Qiusheng; Huang, Xianfei; Zhang, Jiachun; Fang, Hui

doi:10.1007/s11356-020-09711-2

Cited by 29 publications

(17 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e soil Eh ranged from −154.70 to −144.00 mV and −189.50 to −180.60 mV before rice sowing and at harvesting, respectively, which was attributed to intense reduction activity that will produce a large amount of sulfides. Zhang et al [12] found that the Eh value ranged from −182.00 ± 12.85 mV to −478.00 ± 8.01 mV during the whole growth period in the 0-20 cm soil layer. During the rice growing period, because of the long-term waterlogging and plowing of the topsoil as well as the accumulation and decomposition of organic fertilizer and stubble, soil oxidation-reduction alternations occur periodically, which change the soil redox potential.…”

Section: Level Of Heavy Metal Pollution In Rice Soilsmentioning

confidence: 99%

“…e Cd concentrations in paddy soils in the central and western regions were higher than those in the eastern regions and much higher than those in the southeastern coastal regions. Zhang et al [12] described the speciation and accumulation pattern of heavy metals from soil to rice at different growth stages in farmland in southwestern China. Considering the total amount and chemical forms of Cd, they suggested that it was necessary to notify the appropriate departments about the possibility of rice contamination from Cd in the soil.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Health Risk Assessment of Heavy Metals in Soils before Rice Sowing and at Harvesting in Southern Jiangsu Province, China

Cheng

Xie

Chen

et al. 2020

Journal of Chemistry

View full text Add to dashboard Cite

Rice, one of the most important staple crops in China, is easily contaminated by heavy metal pollution from industrial development. In this work, we systematically investigated the heavy metal (Cr, Cd, Pb, Zn, and Cu) and metalloid (Hg and As) concentrations in paddy soils and different rice tissues in southern Jiangsu Province, China. The potential ecological hazard index method and in vitro simulation test were used to evaluate the influence of heavy metals on local resident health. The results showed that, before rice sowing and at the harvesting period, the order of Eri values was EriCd>EriHg>EriAs>EriPb>EriCu>EriCr>EriZn. The low-risk index values (91.63 and 30.29) for the heavy metals indicated the low risk at the two stages in the study area based on the potential ecological hazard index. As determined with Tessier’s five-stage sequential extraction procedure, the proportions of the chemical speciation of the heavy metals were as follows: residual > organic matter-bound > iron-manganese oxide-bound > carbonate-bound > exchangeable. The order of the values of the accumulation and transfer factors was Cd (3.16) > Cu (0.42) > Zn (0.28) > Pb (0.25) > As (0.07) > Cr (0.04) > Cr (0.03) and root > stem > leaves, respectively. In vitro simulation tests showed that, in both adults and children, the daily amount of Pb and Cd intake through the soil-oral cavity route in the study area did not exceed the daily tolerance for Pb and Cd proposed by the WHO. In summary, although there is no obvious danger to local adults and children, it is necessary to be aware of the possibility of rice contamination from Cd in the soil.

show abstract

Section: Level Of Heavy Metal Pollution In Rice Soilsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Health Risk Assessment of Heavy Metals in Soils before Rice Sowing and at Harvesting in Southern Jiangsu Province, China

Cheng

Xie

Chen

et al. 2020

Journal of Chemistry

View full text Add to dashboard Cite

show abstract

“…The amount heavy metals absorbed into the body through rice was calculated by equation (11). ...where W A is the amount of heavy metals that can be absorbed every day, μg/d; W m is the intake of heavy metals; μg/d; and BA is the bioavailability of specific heavy metals, %.…”

Section: In-vitro Simulation Testmentioning

confidence: 99%

“…Under the same conditions, different tissues of the same variety have different physiological and biochemical mechanisms for absorbing heavy metals due to the differences in their external morphology and internal structure, and the accumulation of heavy metals in these tissues is quite different. Zhang et al [11] reported that heavy metal accumulation varied among plant organs and that accumulation decreased in the order roots>stems>leaves. The bioaccumulation factor (BCF) results revealed that during the grainfilling stage, the rice had high BCF values (>1) for Cd and Zn.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the Heavy Metal Risks of Soil and Rice from a Farmland in a Nanjing Suburb through <i>In-vitro</i> Simulation Tests

Cheng¹,

Xie²,

Chen³

et al. 2021

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

The risks from heavy metals in soil and rice from a farmland in a Nanjing suburb, southeastern China, were evaluated using the geo-accumulation index, a health risk assessment and an in-vitro simulation. The concentrations of heavy metals (Pb, Cr, Zn, Cu, Cd, Hg, and As) in the soil and rice were determined in the present study. The results showed that at the two stages measured, the order of geoaccumulation index values (except those of Pb and Zn) was Cd>As>Hg>Cu>Cr. Moreover, the heavy metals with lower I geo values exhibited lower risks at both stages in the study area. The farmland in the study area was not polluted by heavy metals, according to the evaluation of the total heavy metal contents and their chemical speciation. The order of bio-concentration factor was Cd>Cu>Zn>Pb>As>Cr>Hg. For all heavy metals, the non-carcinogenic doses of the different exposure pathways indicated that CDI ing-nc >CDI dermal >CDI inh-nc for children and adults. The HI values for adults and children from heavy metals before rice sowing were 0.0984 and 0.634, respectively, indicating that these metals had little influence on the human body. The HI values for adults and children for heavy metals at the rice harvesting stage were 0.146 and 0.879, respectively. Before rice sowing, the lifetime carcinogenic risk values for local adults and children were 5.60 × 10 −5 and 8.15 × 10 −5 , respectively. At the rice harvesting stage, the lifetime carcinogenic risk values for local adults and children were 3.01 × 10 −5 and 4.48 × 10 −5 , respectively. At both stages, the order of CF values for adults and children was Cd>Cr>As>Pb. The total amounts and bioavailable amounts of the heavy metals ingested by adults and children through eating the local rice did not exceed the tolerable weekly intake values, indicating that there is no health risk from eating the local rice. However, draining and drying the field at the proper time would improve the Eh value of the paddy soil.

show abstract

Health risk assessment of heavy metals in soils and screening of accumulating plants around the Wanshan mercury mine in Northeast Guizhou Province, China

Tang

Xia

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

Speciation and accumulation pattern of heavy metals from soil to rice at different growth stages in farmland of southwestern China

Cited by 29 publications

References 47 publications

Health Risk Assessment of Heavy Metals in Soils before Rice Sowing and at Harvesting in Southern Jiangsu Province, China

Health Risk Assessment of Heavy Metals in Soils before Rice Sowing and at Harvesting in Southern Jiangsu Province, China

Evaluating the Heavy Metal Risks of Soil and Rice from a Farmland in a Nanjing Suburb through <i>In-vitro</i> Simulation Tests

Health risk assessment of heavy metals in soils and screening of accumulating plants around the Wanshan mercury mine in Northeast Guizhou Province, China

Contact Info

Product

Resources

About