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Heavy metal distribution, translocation, and human health risk assessment in the soil-rice system around Dongting Lake area, China.
Environ Sci Pollut Res Int. 2019 Jun; 26(17):17655-17665.ES

Abstract

Heavy metals including copper (Cu), zinc (Zn), cadmium (Cd), chromium (Cr), lead (Pb), and arsenic (As) were investigated in 89 pairs of rice plant and paddy soils around Dongting Lake area, China. Rice plants and soils were collected with GPS device, and heavy metal contents in different rice plant tissues and soils were measured. The aim of the present study was to assess the heavy metal pollution and translocation in the whole soil-rice system, including the consequent human health risk for residents. According to the indices of average geoaccumulation (Igeo) of the studied elements, paddy soils in study area were moderately polluted by Cd, lowly polluted by Pb, and not polluted by Cu, Zn, Cr, and As. Considering the much higher concentrations of studied elements in roots than in other tissues of rice plants, a great mass of these elements was assumed to be confined in the roots. The low translocation factors from root to shoot (Tfroot-shoot) of all the studied heavy metals (0.04-0.74) underpinned this. The high translocation factors from soil to root (Tfsoil-root) of Cd (9.12), As (4.38), and Zn (2.05) indicated the high bioavailability of these heavy metals for rice plant. The health risk assessment using target hazard quotients (THQs) model indicated that Cd (5.17 for adults and 4.49 for children respectively) and As (3.61 for adults and 3.14 for children respectively) could cause human health risk both for adults and children. Further, given the rate of individual THQ values exceeding one, Cu might also be considered as a potential human health dangerous element in the study area. It was worth noting that as one of the main pollutants, Pb did not show human health risk through rice grain consumption due to its low Tf values in soil-rice system. However, the risk identification of As using comparisons of measured concentrations with risk screening value in Chinese paddy soil standard (GB15618-2018) was not consistent with the human health risk assessment result. This might indicate that site-specific risk screening values of As in China is in demand.

Authors+Show Affiliations

College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China.College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China. 29162835@qq.com. College of Life Sciences and Environment, Hengyang Normal University, Hengyang, 421008, Hunan, People's Republic of China. 29162835@qq.com.College of Resource and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, People's Republic of China. leiming8166@yahoo.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31028622

Citation

Tang, Lin, et al. "Heavy Metal Distribution, Translocation, and Human Health Risk Assessment in the Soil-rice System Around Dongting Lake Area, China." Environmental Science and Pollution Research International, vol. 26, no. 17, 2019, pp. 17655-17665.
Tang L, Deng S, Tan D, et al. Heavy metal distribution, translocation, and human health risk assessment in the soil-rice system around Dongting Lake area, China. Environ Sci Pollut Res Int. 2019;26(17):17655-17665.
Tang, L., Deng, S., Tan, D., Long, J., & Lei, M. (2019). Heavy metal distribution, translocation, and human health risk assessment in the soil-rice system around Dongting Lake area, China. Environmental Science and Pollution Research International, 26(17), 17655-17665. https://doi.org/10.1007/s11356-019-05134-w
Tang L, et al. Heavy Metal Distribution, Translocation, and Human Health Risk Assessment in the Soil-rice System Around Dongting Lake Area, China. Environ Sci Pollut Res Int. 2019;26(17):17655-17665. PubMed PMID: 31028622.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Heavy metal distribution, translocation, and human health risk assessment in the soil-rice system around Dongting Lake area, China. AU - Tang,Lin, AU - Deng,Sihan, AU - Tan,Di, AU - Long,Jiumei, AU - Lei,Ming, Y1 - 2019/04/26/ PY - 2018/11/22/received PY - 2019/04/08/accepted PY - 2019/4/28/pubmed PY - 2019/8/2/medline PY - 2019/4/28/entrez KW - Dongting Lake area KW - Geoaccumulation index KW - Health risk assessment KW - Heavy metal pollution KW - Soil-rice system KW - Translocation SP - 17655 EP - 17665 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 26 IS - 17 N2 - Heavy metals including copper (Cu), zinc (Zn), cadmium (Cd), chromium (Cr), lead (Pb), and arsenic (As) were investigated in 89 pairs of rice plant and paddy soils around Dongting Lake area, China. Rice plants and soils were collected with GPS device, and heavy metal contents in different rice plant tissues and soils were measured. The aim of the present study was to assess the heavy metal pollution and translocation in the whole soil-rice system, including the consequent human health risk for residents. According to the indices of average geoaccumulation (Igeo) of the studied elements, paddy soils in study area were moderately polluted by Cd, lowly polluted by Pb, and not polluted by Cu, Zn, Cr, and As. Considering the much higher concentrations of studied elements in roots than in other tissues of rice plants, a great mass of these elements was assumed to be confined in the roots. The low translocation factors from root to shoot (Tfroot-shoot) of all the studied heavy metals (0.04-0.74) underpinned this. The high translocation factors from soil to root (Tfsoil-root) of Cd (9.12), As (4.38), and Zn (2.05) indicated the high bioavailability of these heavy metals for rice plant. The health risk assessment using target hazard quotients (THQs) model indicated that Cd (5.17 for adults and 4.49 for children respectively) and As (3.61 for adults and 3.14 for children respectively) could cause human health risk both for adults and children. Further, given the rate of individual THQ values exceeding one, Cu might also be considered as a potential human health dangerous element in the study area. It was worth noting that as one of the main pollutants, Pb did not show human health risk through rice grain consumption due to its low Tf values in soil-rice system. However, the risk identification of As using comparisons of measured concentrations with risk screening value in Chinese paddy soil standard (GB15618-2018) was not consistent with the human health risk assessment result. This might indicate that site-specific risk screening values of As in China is in demand. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/31028622/Heavy_metal_distribution_translocation_and_human_health_risk_assessment_in_the_soil_rice_system_around_Dongting_Lake_area_China_ DB - PRIME DP - Unbound Medicine ER -