Spatial distribution, contamination levels, sources, and potential health risk assessment of trace elements in street dusts of Urumqi city, NW China

Hini, Gulbanu; Eziz, Mamattursun; Wang, Weiwei; Ili, Anwar; Li, Xinguo

doi:10.1080/10807039.2019.1651629

Cited by 17 publications

(9 citation statements)

References 36 publications

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“…Based on the background value of soil in Xinjiang [10], the pollution level of heavy metals in dust samples are assessed by the PLI [29]. It is calculated based on the following equation:…”

Section: Pollution Assessment Of Heavy Metalsmentioning

confidence: 99%

“…The TCR value below 1 × 10 −6 is not considered to pose significant health effects [39]. The RfD and SF values of analyzed heavy metals are selected according to the relevant literature [10,16,17,40] (Table 2).…”

Section: Carcinogenic Risk Assessmentmentioning

confidence: 99%

“…The spatial distribution patterns of the six heavy metals in surface dust in the study area were illustrated based on the geostatistical analysis method. The geostatistical analysis method is an effective way to identify the spatial heterogeneity and spatial patterns of heavy metal concentrations in surface dust [10,41]. The main tool in the geostatistical analysis is the semivariogram function, γ (h), which shows the spatial dependence between neighboring observations [41].…”

Section: Geostatistical Analysismentioning

confidence: 99%

“…Through the circulation and migration among various ecosystems, heavy metals accumulating in surface dust can be resuspended in the atmosphere or flushed into the surrounding water system and ultimately cause potential risks [8]. In light of this information, research concerning the pollution and potential health risk of heavy metals in urban surface dust has emerged as an important frontier in environmental research [9,10].…”

Section: Introductionmentioning

confidence: 99%

“…It is also an important city of the "silk road economic belt." In recent decades, due to rapid urban developments and increasing traffic density, Korla has been influenced by various types of urban human activities, and thus, the environmental pollution by particulate matters (PMs) and surface dust has become a serious environmental issue [10,26]. So far, however, there is no published literature found yet on the heavy metal pollution assessment of the surface dust of the Korla, and it is necessary to investigate the pollution levels, sources, and potential health risks of hazardous heavy metals in the surface dusts in this area.…”

Section: Introductionmentioning

confidence: 99%

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Identification of the spatial distributions, pollution levels, sources, and health risk of heavy metals in surface dusts from Korla, NW China

Hayrat

Eziz

2020

Open Geosciences

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A total of 54 surface dust samples were gathered from Korla in NW China, and the concentrations of six heavy metal elements, such as Hg, Cd, As, Pb, Cr, and Cu, were determined by standard methods. The geostatistical analysis, multivariate statistical analysis, pollution load index (PLI), and the US EPA health risk assessment model were used to analyze the spatial distribution, pollution, and its potential health risk of heavy metals in surface dusts, and the main sources of heavy metals were also identified. The obtained results indicate that the average concentrations of As in surface dust of Korla is lower than the background values determined in Xinjiang soil, whereas the average concentrations of Hg, Cd, Pb, Cr, and Cu elements exceeded the corresponding background values by factors of 3.71, 1.87, 1.96, 1.14, and 1.29, respectively. The higher concentration of analyzed heavy metals is observed in the northeastern and northern parts in the study area. The pollution level of heavy metals decreased in the following order: Hg > Pb > Cd > Cu > Cr > As. Based on the identified concentrations, the collected dust samples are found to be heavily polluted by Hg and slightly polluted by As, and the remaining elements, Pb, Cd, Cu, and Cr, are found to be low polluted. Furthermore, the PLI values of heavy metals in surface dust vary between 0.74 and 2.74, with an average value of 1.40, at the low pollution level. In addition, As in surface dust in the study area is mainly natural source, while Hg, Cd, Cr, Cu, and Pb are mainly anthropogenic sources. Overall, the carcinogenic and noncarcinogenic health risks of the analyzed elements, instigated mainly by oral ingestion of surface dust, are found to be within the acceptable range for both children and adults. As and Cr are the main noncarcinogenic elements, whereas Cr is the major carcinogenic element among the investigated dust-bound heavy metals in Korla.

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“…Based on the background value of soil in Xinjiang [10], the pollution level of heavy metals in dust samples are assessed by the PLI [29]. It is calculated based on the following equation:…”

Section: Pollution Assessment Of Heavy Metalsmentioning

confidence: 99%