| 雄安新区土壤氟地球化学特征及健康风险评价 |
| 摘要点击 1346 全文点击 380 投稿时间：2022-08-15 修订日期：2022-11-08 |
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| 中文关键词 土壤 氟(F) 地球化学 健康风险 雄安新区 |
| 英文关键词 soil fluorine(F) geochemistry health risk Xiong'an New District |
| 作者 | 单位 | E-mail | | 郭志娟 | 中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000
中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 | gzhijuan@mail.cgs.gov.cn | | 刘飞 | 中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000
中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 | | | 周亚龙 | 中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000
中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 | zyalong@mail.cgs.gov.cn | | 王乔林 | 中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000
中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 | | | 王成文 | 中国地质科学院地球物理地球化学勘查研究所, 廊坊 065000
中国地质调查局土地质量地球化学调查评价研究中心, 廊坊 065000
中国地质科学院地球表层碳-汞地球化学循环重点实验室, 廊坊 065000 | |
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| 中文摘要 |
| 为科学评估雄安新区表层土壤氟(F)地球化学分布特征及人体健康风险,利用GIS 空间分析、相关分析等分析土壤F贫化富集特征及影响因素,开展土壤F健康风险评估,基于蒙特卡罗随机模拟,研究健康风险评价结果的不确定性. 结果表明,新区表层土壤ω(F)均值为641 mg ·kg-1,是全国A层土壤背景值的1.34倍,F过剩和高等级样点占比超过85%,F含量整体相对偏高.灌溉水样ρ(F-)均值为0.85 mg ·L-1, F-含量空间分布特征受浅层地下水水化学类型和流向的影响.土壤F垂向空间变化不显著,其垂向变化主要受土壤有机碳、质地等土壤理化性质的垂向分布影响.表层土壤F的贫化富集主要受地质背景成因控制,人为因素(农业灌溉水、施肥和大气干湿沉降)等外源输入影响其异常的空间分布.区内土壤F含量与地貌环境"标志性"指标Al2O3、Fe2O3、MgO和K2O含量,土壤有机碳(Corg.)、阳离子交换量(CEC)、黏粒和粉粒含量显著正相关(P<0.01).人体健康风险评价结果显示经口摄入是土壤氟主要暴露风险途径,成人非致癌健康风险指数HQ均小于1,危害可忽略; 成人和儿童非致癌健康风险超过阈值的概率分别为34.3%和27.6%,每日土壤摄入量为最敏感参数. |
| 英文摘要 |
| In order to evaluate the distribution characteristics of fluorine geochemistry in the surface soil and human health risk in Xiong'an New District, GIS spatial analysis and correlation analysis were used to analyze the depleted and enriched features and influencing factors of soil fluoride and to carry out the soil fluoride health risk assessment. The uncertainty of the health risk assessment results was studied based on the Monte Carlo stochastic simulation. The results showed that the average content of fluorine was 641 mg·kg-1, which was 1.34 times the background value of the national A-layer soil. The excess fluorine and high-grade samples accounted for more than 85%, and the overall soil fluorine content was relatively high. The average content of fluoride of the irrigation water samples was 0.85 mg·L-1, the spatial distribution characteristics of which were affected by the hydrochemical type and flow direction of shallow groundwater. The vertical spatial variation of soil fluoride, mainly affected by the vertical distribution of soil physicochemical properties such as soil organic carbon and texture, was not obvious. The depletion and enrichment of topsoil fluorine was mainly controlled by the geological background, and its spatial distribution was affected by external inputs, such as human factors (agricultural irrigation water, fertilization, and atmospheric dry and wet deposition). The soil fluoride content was significantly correlated with the iconic indicators of the geomorphological environment, including the content of Al2O3, Fe2O3, MgO, K2O, soil organic carbon (Corg.), cation exchange capacity (CEC), clay, and silt (P<0.01). The results of human health risk assessment showed that oral intake was the main exposure risk route of soil fluoride. The non-carcinogenic health risk index HQ of adults was less than 1, and the harm could be ignored. The probability of non-carcinogenic health risk exceeding the threshold for adults and children was 34.3% and 27.6%, respectively, and daily soil intake was the most sensitive parameter. |
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