Field availability and mobility of metals in Ferralsols developed on ultramafic rock of Niquelândia, Brazil

Garnier, Jérémie; Quantin, Cécile; Raous, Sophie; Guimarães, Edi Mendes; Becquer, Thierry

doi:10.1590/2317-4889202120200092

Cited by 2 publications

(1 citation statement)

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“…Therefore, their presence can be attributed to natural sources rather than human activities. Previous studies had also indicated that the accumulations of Cr, Mn, and Ni in soil were mainly affected by the parent rock [42,43]. Additionally, the analysis of soil profiles (Figure S3) showed that Ni and Cr exhibited the highest concentrations at deeper depths, which was consistent with the high HM geological background of Yunnan [6,8].…”

Section: Hm Source Apportionment In Soil Of Cultivation Areas Of D Br...supporting

confidence: 76%

Bioaccumulation and Potential Risk Assessment of Heavy Metals in Tropical Bamboo Plantations of Dendrocalamus brandisii under Two Cultivation Patterns in Yunnan, China

Cheng,

Dou,

Bao

et al. 2023

Forests

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Heavy metal (HM) pollution nowadays is a hot issue concerning global ecological and food safety. As one of the most important woody bamboos for edible shoots in Southeast Asia and southwest China, Dendrocalamus brandisii usually occurs in red soil with a high HM geological background. However, the bioaccumulation process and possible risks of HMs in their cultivation area remain unclear. In this study, a comprehensive risk assessment of HM pollution was conducted in the main cultivation area of D. brandisii under two cultivation patterns in Yunnan, China. The results revealed that moderate to heavy HM pollution existed in the soil of the study area, while bamboo shoots displayed either no pollution or weak contamination. The “large-area intensive afforestation” cultivation pattern can better control HM pollution in soil and shoots than the “small-scale farmer management” pattern. Strong and complex correlations among HMs were unveiled in both soil and shoot samples. The Cr content of 39% of the shoot samples exceeded China’s national standards. Cu and Zn were the two most easily accumulated HMs in shoots, with BCF of 0.1235 and 0.1101, respectively. Bioaccumulations of As and Cd were positively correlated with their concentrations in soil. Furthermore, the positive matrix factorization model (PMF) identified three main sources of soil HMs, i.e., Pb and Zn from traffic emissions accounting for 30%; Ni, Mn, and Cr from pedogenic parent material making up 35.4%; and As from mining and metallurgical activities accounting for 34.6%. Monte Carlo simulations suggested the probability of total noncarcinogenic risk for children from bamboo shoots was 24.82% and that As in the soil was the primary element of health risk to children (HQc = 13.94%). These findings emphasize the urgent need to control and mitigate HM pollution from the identified sources and may contribute to the sustainable cultivation of D. brandisii and food safety in Yunnan and similar tropical areas with high HM contents.

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Section: Hm Source Apportionment In Soil Of Cultivation Areas Of D Br...supporting

confidence: 76%