Trace metal(loid)s contamination in paddy rice (Oryza sativa L.) from wetlands near two gold mines in Côte d’Ivoire and health risk assessment

Kinimo, Kakou Charles; Yao, Koffi Marcellin; Marcotte, Stéphane; Kouassi, N’guessan Louis Bérenger; Trokourey, Albert

doi:10.1007/s11356-021-12360-8

Cited by 8 publications

(1 citation statement)

References 37 publications

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“…In addition, as one of the major pollution sources, the mining of non-ferrous mines also released large amounts of Cd into the surrounding soil environment, such as the mining of lead, zinc, arsenic, manganese, antimony, gold, barium, and uranium [18][19][20]. As the major concentration region of non-ferrous production and also the main rice production region, the exploitation of non-ferrous mines in southern China has resulted in a Cd concentration in some rice grain that exceeded the national standard limitation of China (GB 2762-2017) and posed serious potential health risk of local residents [18,21,22].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Cd Pollution in Paddy Soil–Rice System in Silver Mining-Affected Areas: Pollution Status, Transformation and Health Risk Assessment

Jiao

et al. 2022

IJERPH

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Mining activities are one of the main contamination sources of Cd in soil. However, the information about the influence of silver mining on Cd pollution in soil in mining-affected areas is limited. In the present study, sixteen paired soil and rice grain samples were collected from the farmland along the Luxi River nearby a silver mine in Yingtan City, Jiangxi Province, China. The total, bioavailable, and fraction of Cd in soil and Cd content in rice grain were determined by inductively coupled plasma mass spectrometry. The transformation of Cd in the soil–rice system and potential health risk via consumption of these rice grains were also estimated. The results showed that Cd concentration in these paddy soils ranged from 0.21 to 0.48 mg/kg, with the mean Cd concentration (0.36 mg/kg) exceeded the national limitation of China (0.3 mg/kg, GB 15618-2018). Fortunately, all these contaminated paddy soils were just slightly polluted, with the highest single-factor pollution index value of 1.59. The DTPA- and CaCl2-extractable Cd in these paddy soils ranged from 0.16 to 0.22 mg/kg and 0.06 to 0.11 mg/kg, respectively, and the acid-soluble Cd occupied 40.40% to 52.04% of the total Cd, which was the highest among different fractions. The concentration of Cd in rice grain ranged from 0.03 to 0.39 mg/kg, and the mean Cd concentration in rice grain (0.16 mg/kg) was within the national limitation of China (0.2 mg/kg, GB 2762-2017). The bioaccumulation factor of Cd in rice grain ranged from 0.09 to 1.18, and its correlation with various indicators was nonsignificant (p < 0.05). Health risk assessment indicated that the noncarcinogenic risk for local rice consumers was within the acceptable range, but the carcinogenic risk (CR) was ranging from 1.24 × 10−2 to 1.09 × 10−3 and higher than the acceptable range (1.0 × 10−4), indicating that the local rice consumers suffered serious risk for carcinogenic diseases. The results of the present study can provide reference for safety production of rice in silver mining-affected areas.

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