Arsenic speciation in wild marine organisms and a health risk assessment in a subtropical bay of China

Zhang, Wei; Guo, Zhiqiang; Song, Dawei; Du, Sen; Zhang, Li

doi:10.1016/j.scitotenv.2018.01.108

Cited by 72 publications

(28 citation statements)

References 48 publications

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“…Compared to marine fish, 1.28~22.8%, the inorganic arsenic has a lower proportion in muscle, liver, and gill in Tilapia, at just 0.35%~5%. In previous studies, the sequence of As species in marine fish organisms was AsB > DMA > MMA≈As(V) and As(III) in 19 marine organisms, which indicated low health risks considering organic arsenic is much less toxic [32]. The findings in our study showed the similar sequence of As species.…”

Section: Resultssupporting

confidence: 79%

The Bioaccumulation and Tissue Distribution of Arsenic Species in Tilapia

Jia

Zuo

Wang

et al. 2019

IJERPH

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Arsenic is a public concern due to its widespread occurrence and carcinogenicity. Consumption of arsenic-contaminated fish is an important exposure pathway for human health. This study focused on understanding how exposure to arsenic-contaminated fish is informative to human health risk assessment. While the bioaccumulation and tissue distributions of total arsenic concentration in fish are commonly reported, there are limited studies related to the time-course of arsenic species in various tissues. Using the Tilapia as a case, this study aimed to investigate the bioaccumulation and tissue distributions (liver, gastrointestinal (GI), muscle, and gill) of arsenic species in freshwater fish via diet-borne inorganic arsenic exposure. In particular, the Tilapia were exposed to arsenic (III) and As(V) for 32 days. The accumulation of arsenic in all tissues linearly increased with time in the first 10 days’ exposure, while the arsenic levels remained stable in the following 20 days’ exposure. The accumulation of arsenic in tissue followed the sequence of intestine > liver > gill > muscle. Meanwhile, more than 90% of arsenic was converted into organic form in liver, gill, and muscle, while organic arsenic contributed about 30–80% to the total arsenic in the GI. The percentage of organic form in muscle is the highest, followed by gill, liver, and intestine, and arsenobetaine is the main form of organic arsenic. While the exposure profiles of As(III) and As(V) are quite similar, the absorption rate of As(V) is relatively higher than that of As(III). Information provided here can be instrumental for exposure assessment and risk management for arsenic in aquatic environment.

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Section: Resultssupporting

confidence: 79%

The Bioaccumulation and Tissue Distribution of Arsenic Species in Tilapia

Jia

Zuo

Wang

et al. 2019

IJERPH

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“…A significant negative correlation was observed between bottom salinity and TN, TOC, and the heavy metals except for Hg (p < 0.05) ( Table 2), suggesting that salinity was an important controlling factor affecting the sediment heavy metal abundance [45]. Research has indicated that increased salinity could increase the mobility of As and Cd [4,46], thus decreasing heavy metal accumulation in the sediment. A significant negative correlation between Eh and heavy metals (including Cu, Zn, Cd, Ni, Hg, and Cr), TN, and TOC was established (p < 0.05).…”

Section: Sources Identificationmentioning

confidence: 96%

“…Heavy metals include mercury (Hg), cadmium (Cd), arsenic (As), lead (Pb), and chromium (Cr), which are not required for normal human metabolic activity. These metals can accumulate in aquatic organisms, which may subsequently negatively impact human health through bioaccumulation in the food chain [3,4]. Heavy metals also include essential elements, such as copper (Cu), zinc (Zn), and nickel (Ni), which can cause toxic effects due to excessive intake [3,5].…”

Section: Introductionmentioning

confidence: 99%

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Tang

Yan

et al. 2018

Water

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Surface sediment samples were collected from 19 sites throughout Daya Bay, China to study the concentrations, spatial distributions, potential ecological risk, and possible sources of heavy, including metals copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), nickel (Ni), lead (Pb), mercury (Hg), and chromium (Cr). The mean concentrations of the eight heavy metals were 24, 109, 6.5, 0.09, 35.3, 26.8, 0.07, and 109 µg g −1 , respectively. The concentrations of most heavy metals were within range of those recorded in previous years. The spatial distribution pattern of most heavy metals were similar, with lowest values recorded along the southeast coast and the open sea area; the highest values were recorded in the northern Daya Bay, especially the northwest. Cu, Zn, As, Cd, Pb, and Hg were classified as Class I, and Ni and Cr were classified as Class II according to the Sediment Quality Guidelines (SQGs) of China. The potential ecological risk (E i f) indices of Cu, Zn, As, Pb, Ni, and Cr specify that these metals pose low risk to the ecosystem of the Bay, whereas Cd and Hg pose a very high risk in some sites. The geoaccumulation indices (I geo) of Cu, Zn, As, Ni, and Cr specify weak or no pollution in Daya Bay, whereas those of Pb, Cd, and Hg in some sites indicate moderate or even high pollution. Spatial distribution, carbon/nitrogen analysis, Pearson correlation, and principal components analysis indicated that Cu, Zn, As, Pb, Ni, Cr, total organic carbon (TOC), and total nitrogen (TN) originated from the same sources. Ballast water or sewage from the cargo ships that park at the harbors or anchor in the Bay were the important sources for Cu, Zn, As, Pb, Ni, Cr, TOC, and TN. Other anthropogenic sources, such as agricultural runoff and aquaculture, might also be responsible, whereas Hg and Cd originated from other point sources.

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“…At present, heavy metals in urban road dust such as Cd, Ni, Cu, Pb, and Cr have been mostly studied from the perspective that the enrichment of these elements has important environmental significance and serious environmental pollution hazards [ 30 , 31 , 32 ]. As shown in Figure 3 —the contents of heavy metals in road dust of some cities at home and abroad, the contents of different elements in road dust in different cities are quite different from each other, which is mainly related to the size of the urban population, traffic volume, urban topography, and meteorology, as well as the background concentrations in soils around the country.…”

Section: Resultsmentioning

confidence: 99%

Content of Heavy Metal in the Dust of Leisure Squares and Its Health Risk Assessment—A Case Study of Yanta District in Xi’an

Shao

Pan

Chen

et al. 2018

IJERPH

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Taking Yanta District in Xi’an as the research object, the present study measures the contents of Cadmium (Cd), Lead (Pb), Copper (Cu), Nickel (Ni), and Chromium (Cr) in dust samples and further assesses the health risk of heavy metals intake through dust based on the assessment method of human exposure risk proposed by U.S. EPA, with an aim to investigate the content of heavy metal in the dust of leisure squares and its exposure risk. As the results indicate, the average contents of five heavy metals are obviously higher than the soil background value in Shaanxi Province. Therefore, Cd, Ni, Cu, Pb, and Cr are obviously enriched in urban surface dust in Shaanxi Province, due to the influence of human activities. In addition, it can also be found that the non-carcinogen exposure risk in children is significantly higher than that in adults with the risk values of these five heavy metals all one order of magnitude higher than those of adults. Irrespective of whether addressing the results for children or adults, the non-carcinogen exposure doses of five heavy metals are sorted as Cr > Pb > Cu > Ni > Cd. According to the present situation, for a child, the total non-carcinogenic risk values of five heavy metals have exceeded the safety limit in 11 of the 20 leisure squares in Yanta District of Xi’an. That means the leisure squares are no longer suitable for physical and recreational activities. For the five heavy metals, the average non-carcinogenic risk value of Cr is largest, and causes the largest threat to health in Yanta District, Xi’an. The carcinogenic exposure doses of the heavy metals Cr, Cd, and Ni are very low in respiratory pathways and there is no carcinogenic health risk. In general, the Cr content in dust in domestic cities is higher than that of foreign cities; however, the Pb content is much lower.

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Arsenic speciation in wild marine organisms and a health risk assessment in a subtropical bay of China

Cited by 72 publications

References 48 publications

The Bioaccumulation and Tissue Distribution of Arsenic Species in Tilapia

The Bioaccumulation and Tissue Distribution of Arsenic Species in Tilapia

Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China

Content of Heavy Metal in the Dust of Leisure Squares and Its Health Risk Assessment—A Case Study of Yanta District in Xi’an

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