Reliability of stable Pb isotopes to identify Pb sources and verifying biological fractionation of Pb isotopes in goats and chickens

Nakata, Hokuto; Nakayama, Shouta M.M.; Yabe, John; Liazambi, Allan; Mizukawa, Hazuki; Darwish, Wageh Sobhy; Ikenaka, Yoshinori; Ishizuka, Mayumi

doi:10.1016/j.envpol.2015.10.006

Cited by 28 publications

(30 citation statements)

References 58 publications

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“…There was a large variation of Pb isotopic ratios among different tissues ( Figure 3(b) ), which was similar to other mammal or birds [ 32 ]. The highest concentration of Pb measured in the gill suggested that the fish can accumulate Pb from water primarily through its gill [ 68 ].…”

Section: Resultssupporting

confidence: 70%

“…The composition of Pb isotopes depends on the decay rate and the amount of parent isotopes, and its fractionation does not present in physical and chemical processes [ 26 ]. The different sources of Pb pollution and ore deposits have unique Pb isotopic ratios, and therefore, many previous studies used isotopic fingerprinting to identify the source of Pb pollution in aerosols [ 27 , 28 ], sediments [ 29 – 31 ], and organisms [ 32 – 34 ]. However, the study about Pb isotopic ratios in different fish tissues is scarce so far, because of biological fractionation [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

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Metals in Fishes from Yongshu Island, Southern South China Sea: Human Health Risk Assessment

Cai

et al. 2017

Journal of Toxicology

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In order to assess the bioaccumulation of metals associated with gender, tissues, and their potential ecological risk, four species of fish were collected from the Yongshu Island in the Southern South China Sea. Metals and stable Pb isotopes in their tissues (muscle, gill, liver, intestine, and ovary) were determined. The concentrations of metals (mg/kg, dry weight) in these species were ND–21.60 (Cd), 1.21–4.87 (Cr), 0.42–22.4 (Cu), 1.01–51.8 (Mn), 0.30–3.28 (Ni), 6.04–1.29 × 103 (Zn), 14.89–1.40 × 103 (Fe), and 0.22–3.36 (Pb). In general, the liver and intestine absorbed more metals than the other tissues. Metals accumulation can be influenced by gender and feeding behavior and in fact, female fish and dietary exposure are more prone to accumulate metals. In addition, Pb isotopic ratios indicated that all species had significant biological fractionation, which may not make them good tracers for source identification. The metal concentrations of most samples were lower than the national standard values of the FAO (USA), which suggested that human consumption of these species may not cause health risks. However, since the surrounding areas are developing rapidly, the potential environmental risk of metals will intensify and should receive more attention.

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Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Metals in Fishes from Yongshu Island, Southern South China Sea: Human Health Risk Assessment

Cai

et al. 2017

Journal of Toxicology

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“…In the un-amended soil, the Pb concentrations in the maize grain were more than 100 times higher than the joint FAO/WHO maximum permissible limit of 0.2 mg kg −1 for health safety but decreased significantly (only 24 times higher) in the chicken manure amended plots. High Pb and Cd concentrations in maize in Kabwe was previously reported by Nakata et al [44]. These high concentrations resulted in high estimated intake (EI) values as well as hazard quotients (HQ).…”

Section: Health Risk Assessmentmentioning

confidence: 69%

Lead, Zinc and Cadmium Accumulation, and Associated Health Risks, in Maize Grown near the Kabwe Mine in Zambia in Response to Organic and Inorganic Soil Amendments

Mwilola

Mukumbuta

Shitumbanuma

et al. 2020

IJERPH

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Health risks due to heavy metal (HM) contamination is of global concern. Despite concerns of high levels of HMs in soils near Kabwe mine in Zambia, edible crop production is common, posing potential health risks. This study assessed the potential of chicken manure (CM), triple superphosphate (TSP) and a blended fertilizer (BF; consisting of Nitrogen, Phosphorous and Potassium (NPK) fertilizer and composted chicken manure) to reduce lead (Pb), zinc (Zn) and cadmium (Cd) in soils and their accumulation in maize grown near the Kabwe mine. Maize was grown to maturity and its HM concentrations and associated health risk indices were calculated. All soil amendments decreased bioavailable soil Pb concentrations by 29–36%, but only CM decreased Zn, while the amendments increased or had no effect on Cd concentrations compared to the control. The amendments reduced Pb (>25%) and Zn concentrations (>18%) in the maize stover and grain. However, Cd concentrations in maize grain increased in the BF and TSP treatments. Bioaccumulation factors showed that Cd had the highest mobility from the soil into maize stover and grain, indicating the need for greater attention on Cd in Kabwe despite its apparently lower soil concentration compared to Pb and Zn. The hazard quotients for Pb and Cd were much greater than one, indicating a high risk of possible exposure to toxic levels by people consuming maize grain grown in this area. This study demonstrated the significant potential of manure and phosphate-based amendments to reduce Pb and Zn, and to some extent Cd, uptake in maize grain and consequently reduce associated health risks.

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“…In the case of Pb pollution caused by a single source such as leaded gasoline or mining activity, Pb-IRs in the living body reflect those in the pollution source comparatively accurately; therefore, the exact pollution source could be identified [ 44 ]. Unlike such a case with a single pollution source, it is widely considered that Japan has no single major source of Pb after the discontinuance of leaded gasoline in 1975.…”

Section: Discussionmentioning

confidence: 99%

Monitoring Lead (Pb) Pollution and Identifying Pb Pollution Sources in Japan Using Stable Pb Isotope Analysis with Kidneys of Wild Rats

Nakata

Nakayama

Oroszlany

et al. 2017

IJERPH

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Although Japan has been considered to have little lead (Pb) pollution in modern times, the actual pollution situation is unclear. The present study aims to investigate the extent of Pb pollution and to identify the pollution sources in Japan using stable Pb isotope analysis with kidneys of wild rats. Wild brown (Rattus norvegicus, n = 43) and black (R. rattus, n = 98) rats were trapped from various sites in Japan. Mean Pb concentrations in the kidneys of rats from Okinawa (15.58 mg/kg, dry weight), Aichi (10.83), Niigata (10.62), Fukuoka (8.09), Ibaraki (5.06), Kyoto (4.58), Osaka (4.57), Kanagawa (3.42), and Tokyo (3.40) were above the threshold (2.50) for histological kidney changes. Similarly, compared with the previous report, it was regarded that even structural and functional kidney damage as well as neurotoxicity have spread among rats in Japan. Additionally, the possibility of human exposure to a high level of Pb was assumed. In regard to stable Pb isotope analysis, distinctive values of stable Pb isotope ratios (Pb-IRs) were detected in some kidney samples with Pb levels above 5.0 mg/kg. This result indicated that composite factors are involved in Pb pollution. However, the identification of a concrete pollution source has not been accomplished due to limited differences among previously reported values of Pb isotope composition in circulating Pb products. Namely, the current study established the limit of Pb isotope analysis for source identification. Further detailed research about monitoring Pb pollution in Japan and the demonstration of a novel method to identify Pb sources are needed.

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Reliability of stable Pb isotopes to identify Pb sources and verifying biological fractionation of Pb isotopes in goats and chickens

Cited by 28 publications

References 58 publications

Metals in Fishes from Yongshu Island, Southern South China Sea: Human Health Risk Assessment

Metals in Fishes from Yongshu Island, Southern South China Sea: Human Health Risk Assessment

Lead, Zinc and Cadmium Accumulation, and Associated Health Risks, in Maize Grown near the Kabwe Mine in Zambia in Response to Organic and Inorganic Soil Amendments

Monitoring Lead (Pb) Pollution and Identifying Pb Pollution Sources in Japan Using Stable Pb Isotope Analysis with Kidneys of Wild Rats

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