| 吴正强,王家乐,杨忠,等.赤水金钗石斛及其种植环境介质中放射性水平调查[J].中华放射医学与防护杂志,2026,46(7):688-692.Wu Zhengqiang,Wang Jiale,Yang Zhong,et al.Investigation on radioactivity levels in Dendrobium nobile Lindl. and its cultivation matrices in Chishui, Guizhou province[J].Chin J Radiol Med Prot,2026,46(7):688-692 |
| 赤水金钗石斛及其种植环境介质中放射性水平调查 |
| Investigation on radioactivity levels in Dendrobium nobile Lindl. and its cultivation matrices in Chishui, Guizhou province |
| 投稿时间：2025-08-06 |
| DOI：10.3760/cma.j.cn112271-20250806-00282 |
| 中文关键词: 金钗石斛 放射性 放射性核素 210Pb 种植环境介质 |
| 英文关键词:Dendrobium nobile Lindl. Radioactivity Radionuclides 210Pb Cultivation matrices |
| 基金项目:贵州省卫生健康委科学技术基金项目(gzwkj2025-499);贵州省疾控中心青年科学基金项目(2023-E-3);李世军博士工作室项目(bsgzs2025-01) |
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| 中文摘要: |
| 目的 调查赤水金钗石斛及其种植环境介质中放射性物质水平,分析环境介质中放射性核素含量与其在金钗石斛中含量的相关性。方法 采集贵州省赤水市主要的8个金钗石斛仿野生种植基地的金钗石斛鲜茎、丹霞石、苔藓和水源水等共32份样品,分别采用高纯锗γ能谱仪和低本底α、β计数器对金钗石斛、丹霞石和苔藓中放射性核素238U、232Th、226Ra、40K、210Pb和137Cs的含量以及水源水中总α、总β放射性进行检测,并对丹霞石和苔藓中主要放射性核素含量与其在金钗石斛中含量进行皮尔逊相关性分析。结果 金钗石斛中232Th、226Ra、40K、210Pb和137Cs含量平均值分别为(1.07 ± 0.30)、(1.04 ± 0.44)、(297.1 ± 62.1)、(157.1 ± 57.2)和(0.093 ± 0.087)Bq/kg(干重),238U含量低于探测下限。丹霞石中232Th、226Ra、40K、137Cs和210Pb含量,以及苔藓中232Th、226Ra、40K和137Cs含量,与其在金钗石斛中含量的相关性均无统计学意义(P>0.05);苔藓中210Pb含量与其在金钗石斛中含量的相关性有统计学意义(r=0.90,P<0.05)。结论 赤水金钗石斛中238U、232Th、226Ra、40K和137Cs含量均远低于国家标准 GB 14882-1994 规定的食品中放射性核素限制浓度。金钗石斛中210Pb含量与其在苔藓中含量呈强正相关关系。 |
| 英文摘要: |
| Objective To investigate the radioactivity level both in Dendrobium nobile Lindl (D. nobile) and its cultivation matrices in Chishui, Guizhou province, and analyze the correlation between them.Methods A total of 32 samples, including stems of D. nobile, Danxia stones, mosses, and source water, were collected from 8 major wild-simulated cultivation bases in Chishui where D. nobile is planted. The activity concentrations of 238U, 232Th, 226Ra, 40K, 210Pb and 137Cs in D. nobile, Danxia stones and mosses were determined by using high-purity germanium (HPGe) gamma spectrometer, and the gross α and gross β radioactivity in source water were determined by using low background α/β counter. Pearson correlation analysis was performed respectively for their activity concentrations. Results The mean activity concentrations in D. nobile were found to be 232Th (1.07 ± 0.30), 226Ra (1.04 ± 0.44), 40K (297.1 ± 62.1), 210Pb (157.1 ± 57.2), and 137Cs (0.093 ± 0.087) Bq/kg (dry weight), respectively, and 238U concentrations was below the detection limit. No statistically significant correlation (P > 0.05) was found of the activity concentrations of 232Th, 226Ra, 40K, 210Pb, and 137Cs in Danxia stones and of 232Th, 226Ra, 40K, and 137Cs in mosses with in D. nobile. However, a statistically significant correlation was observed of the activity concentrations of 210Pb in mosses and with in D. nobile (r= 0.90, P < 0.05). Conclusions The activity concentrations of 238U, 232Th, 226Ra, and 137Cs were all far below the limits specified in the national standard Limited Concentrations of Radioactive Materials in Foods (GB 14882-1994). Positive correlation was shown of the activity concentration of 210Pb between in D. nobile and in mosses. |
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