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| The radiation evironmental effects of Ra226, Th232 Radionuclides in the sludge from battery and electroplating factories |
| Received:September 20, 2016 Revised:November 23, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.06.013 |
| KeyWord:Battery sludge Eletroplating sludge Radionuclides Gamma Energy Spectrum Analysis Enrichment Factor |
| Author | Institution |
| 陈冬 |
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| 颜学武 |
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| 廖雅杰 |
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| 张宗祥 |
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| 吴晶 |
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| 毛慧 |
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| 刘颖 |
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| 杨毅 |
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| Abstract: |
| The radionuclides, such as 228Ac, 212Pb, 212Bi, 208Tl, 214Pb, 214Bi and 40K, occurring in the sludge samples from five lead-acid battery or electroplating factories in JiangSu province were analyzed on High Purity Germanium crystal spectrometer(HPGe). The radioactivity of each radionuclides were calculated with data obtained on HPGe. The estimated annual average effective dose contributed by these sludge samples was 44.8(19.2～50.3)μSv.a-1 with Monte Carlo N Particle Transport Code(MCNP) dose rate conversion factor. The Enrich Factor(EF) of 232Th was about (0.478~2.217), and EF of 226Ra about (2.509~4.115), indicting that the radionuclides were enriched during the manufacture process to some extent. In addition, There were observed significant positive correlations between the amount of heavy metal chromium and lead and radionuclides 232Th and radioactivity in chromium sludge samples with the Pearson correlation matrix range (0.411～0.576),(0.494～0.797) and (0.455～0.844),(0.371～0.821), respectively. The Pearson correlation matrix for chromium and radium equivalent activity(Raeq) reach to 0.884 in SDCS, Moreover，lead and Raeq reach to 0.820,0.801 in YXCS,MXCS, respectively, indicating the use of relative heavy metals concentrations to predict radioactivity for studied sludge is possible. |
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