| 摘要: |
| 为了解洞穴驼螽中重金属含量及其健康危害,本文以贵阳市洞穴内的驼螽为研究对象,研究洞穴驼螽体内重金属(Cr、Ni、Cu、Zn、As、Cd、Hg、Pb)含量,采用体外消化试验(人工模拟胃肠液)分析驼螽重金属的生物可给性,应用靶标危害系数法评估驼螽重金属对暴露人群造成的健康风险,以及应用潜在生态风险指数法评估驼螽生境(洞穴土壤)的重金属污染程度。结果表明:驼螽体内的Zn、Cu、Cr、Ni含量较高,Hg、Cd、As、Pb含量较低；土壤中的Cu、Zn、As、Cd、Pb含量总体高于洞外土壤背景值。驼螽中重金属在人工胃肠溶液中的生物可给性范围为0.26 %～70.58 %,说明驼螽中的重金属在胃肠液中未完全溶出。基于重金属总量和生物可给性的健康风险评价表明,驼螽重金属在人工胃肠阶段的THQ远低于驼螽(重金属总量)的THQ,说明基于重金属总量的健康风险评估会高估其健康风险。若将洞穴驼螽作为药材时,对于常规服用中药的人群来说,建议儿童每日摄入驼螽量不超过58.5 g,成人不超过100.0 g；对于终生每天服药的极端的人群来说,建议儿童每日摄入驼螽量不超过2.0 g,成人不超过3.5 g。潜在生态风险评价表明,排洞、金枝洞和龙洞的综合潜在生态风险处于中等生态风险,老歪洞已达到重度生态风险。Cd和Hg对综合潜在生态风险的贡献率最大,为75.06 %,是洞穴土壤的主要风险因子。 |
| 关键词: 重金属 驼螽 生物可给性 健康风险评价 潜在生态风险评价 喀斯特洞穴 |
| DOI： |
| 投稿时间：2024-10-29修订日期：2024-12-12 |
| 基金项目:国家自然科学(31660152)；贵州省科技计划项目(黔科合基础-ZK[2024]一般429) |
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| Evaluation of Bioavailability and Health Risk of Heavy Metal in Cave Crickets — A Case Study of Guiyang Caves |
|
liweiya, xuchengxiang
|
| (Guizhou Normal University) |
| Abstract: |
| In order to understand the content of heavy metals in cave crickets and their health hazards, this paper studied the contents of heavy metals (Cr, Ni, Cu, Zn, As, Cd, Hg, Pb) in cave crickets in Guiyang. The bioavailability of heavy metals in cave crickets was analyzed by in vitro digestion test (artificial simulation of gastroenteric fluid), the health risk of cave crickets heavy metals to the exposed populations was assessed by applying the Target Hazard Quotients (THQ) method, and the potential ecological risk index method was used to assess the degree of heavy metal pollution in the habitat of cave crickets (cave soil). The results showed that the cave crickets contained high levels of Zn, Cu, Cr and Ni, and low levels of Hg, Cd, As and Pb, and that the levels of Cu, Zn, As, Cd and Pb in the soil were generally higher than the background values of the soil outside the cave. The bioavailability of heavy metals in the artificial gastrointestinal solution in the cave crickets ranged from 0.26% to 70.58%, ind |
| Key words: heavy metal cave crickets Bioavailability Health risk assessment Potential ecological risk assessment Karst cave |
