Heavy metal distribution between parent soil and pepper in an unpolluted area, Hainan Island, China

An integrated approach to the bioavailability, ecological, and health risk assessment of potentially toxic elements in soils within a barite mining area, SE Nigeria

“…The mean concentration of Mn and Pb varied from 21.32 mg/kg −1 to 65.91 mg/kg −1 and 1.21 mg/kg −1 to 9.32 mg/kg −1 , respectively. The ability of these metals to form strong organic metal complexes with soil organic matter together with their poor mobility potential may have been responsible for their concentration in the soil (Nganje et al, 2020;Olade, 1976;Guo, 2012). Moreover, the enrichment of Pb in the soil is derived from the weathering of sulphide ore mineral galena (PbS) which occurred in association with barite mineralization in the area.…”

Contamination characteristics, coexistence relationships and health risk assessment of dioxins and metals in topsoil around municipal solid waste incinerator in Hainan, China

“…First, the concentrations of these metals (including As, Cd, Cr, Cu, Hg, Pb, Fe and Zn), are lower than those in existing studies, mainly in Beijing (Han et al, 2016), Guangdong (Li et al, 2017), Zhejiang and Chongqing (Zhong et al, 2019) and London (Rimmer et al, 2006). Possible reason might be that the studied MSW incinerator is located in Qionghai (the industry least developed city), and the soil pollution from other emission sources is quite limited (Guo et al, 2012). Second, the concentrations of Sb, Mn, Ni and Co in this study are higher than those in studies on Zhejiang in China (Zhong et al, 2019), Northern Italy (Capuano et al, 2005) and Catalonia in Spain (Rovira et al, 2014;Rovira et al, 2015;Rovira et al, 2018).…”

“…For MSW incinerator emission sources (see Figure 4A), the total I-TEQ values in soils near the studied MSW incinerator are close to or smaller than that in most other studies, such as the research focused on Beijing (Li W. et al, 2014), Hangzhou (Jin et al, 2012), Shanghai (Deng et al, 2011), Northern Taiwan (Wang et al, 2008) in China and Moscow Parks (Shelepchikov et al, 2011) in Russia. The potential reason might be that the studied MSW incinerator is located in the suburb of Qionghai (a city of Hainan Province), which has the low level of industrialization, and small number of large-scale industrial plants (Xu et al, 2014;Wu et al, 2016), therefore largely reducing the impact of other anthropogenic emission sources on the pollutant concentrations in soils (Guo et al, 2012). In addition, Hainan Province required the MSW incineration power generation plants to implement the world's strictest dioxins emission limit (i.e., 0.05 ng TEQ/m 3 ) since August 2018(DEEHP 2018, which might be one reason for the lower dioxins level in soils around the studied MSW incinerator.…”

“…To accurately evaluate the effects of MSW incineration to the soil contaminations and human health, a relatively pure area, which is located in Hainan Province, is especially introduced as a case study to eliminate the assessment uncertainty. Hainan Province, which is a recognized unpolluted area in southern China, because there has no heavy industry (Guo et al, 2012;Wang A. T. et al, 2019) and a small population (accounting for only 0.67% of the national population) (NBSC, 2019). The major human activity in Hainan Province is ecological tourism, which is highly dependent on the coastal environment and requires high environmental quality (Zhao et al, 2020).…”

Exposure risk assessment of nine metal elements in Chongqing hotpot seasoning

“…7 Eating contaminated crops will have a negative impact on humans, animals and ecosystems. 8 The metal elements in CHS are mainly from the raw materials. At present, there are many reports about metal enrichment in food at home and abroad, but different food in different countries and regions are polluted by metals differently.…”