Monitoring of lead, cadmium, chromium and nickel in placenta from an e-waste recycling town in China
| Autor: | Xijin Xu, Yan Li, Jingrong Huang, Yongyong Guo, Qiongna Xiao, Hui Yang, Aimin Chen, Yuanping Wang, Kusheng Wu, Xia Huo, Guina Zheng, Junxiao Liu |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Chromium
China Conservation of Natural Resources Environmental Engineering Wet weight Placenta chemistry.chemical_element Environmental pollution Nickel Pregnancy Surveys and Questionnaires medicine Humans Environmental Chemistry Waste recycling Waste Management and Disposal Cadmium Spectrophotometry Atomic Environmental engineering Heavy metals Pollution medicine.anatomical_structure Lead chemistry Environmental chemistry Female |
| Zdroj: | Science of The Total Environment. 408:3113-3117 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2010.04.018 |
| Popis: | Toxic heavy metals are released to the environment constantly from unregulated electronic waste (e-waste) recycling in Guiyu, China, and thus may contribute to the elevation of lead and other heavy metals levels in placenta. We aimed to investigate concentrations of heavy metals, including lead (Pb), cadmium (Cd), chromium (Cr), and nickel (Ni) in placenta from Guiyu and compared them with those from a control area where no e-waste processing occurs. Two hundred and twenty human placentas were collected from Guiyu (n=101) and the control area (n=119). The placenta concentrations of Pb, Cd, Cr, and Ni (PCPb, PCCd, PCCr, and PCNi) were determined by graphite furnace atomic absorption spectrometry (GFAAS). Risk factors of high exposure and correlation with adverse pregnancy outcomes were analyzed using Spearman correlation analyses. PCPb from Guiyu ranged from 6.51 to 3465.16ng/g with a median of 301.43ng/g, whereas PCPb from the control area ranged from 4.53 to 3176.12ng/g with a median of 165.82ng/g (P=0.010). We also observed that in Guiyu, 41.6% of women (42/101) had PCPb>500ng/gwt (wet weight), compared with 24.4% of women (29/119) in the control area (P=0.006). No significant differences of PCCd and PCCr were found between the two groups. In contrast, PCNi was higher in samples from the control area (median 14.30, range 1.76-593.70ng/g) than in Guiyu samples (median 7.64, range 1.19-1108.99ng/g) (P=0.000), and a negative correlation between PCNi and gestational age was found in this study (P=0.017). Spearman correlation analyses showed that there was correlation between PCPb and residence in e-waste recycling area. Environmental pollution, resulted from unregulated e-waste recycling activities, may contribute to elevated PCPb in neonates born in Guiyu and threaten their health. |
| Databáze: | OpenAIRE |
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