【摘要】 目的了解桂东南某河流铊污染3年后沿岸某村井水、土壤、地产食用农产品以及居民重金属铊含量水平,评估当地居民健康风险。方法于2016年,选择2013年发生铊污染事件的某河流沿岸某村作为污染区,选择该河流污染段上游沿岸的1个自然村作为对照区。采集井水、土壤、地产食用农产品及(18～75)岁常住居民尿液样品,采用电感耦合等离子体质谱仪(ICP-MS)测定井水、土壤、食物及尿液铊含量水平。结果污染区井水铊含量(M=0.290μg/L)高于对照区(未检出),差异有统计学意义(z=-6.51,P<0.01),污染区井水铊合格率(24.6%)低于对照区(100.0%),差异有统计学意义(χ~2=42.48,P<0.01);污染区土壤铊含量(M=0.755 mg/kg)高于对照区(M=0.595 mg/kg),差异有统计学意义(z=-2.02,P<0.05);污染区食物铊含量(M=1.861μg/kg)高于对照区(M=0.250μg/kg),差异有统计学意义(z=-4.14,P<0.01);污染区人群尿铊含量(G=0.70μg/g肌酐)与对照区(G=0.67μg/g肌酐)相比差异无统计学意义(F=1.18,P>0.05)。结论污染区人群存在一定水平的铊暴露,但人群尿铊水平与对照区人群水平相当。更多还原

【Abstract】 Objective To investigate thallium levels in well water, soil, and food products from land, as well as residents of a village along a river of thallium pollution in southeast Guangxi Zhuang Autonomous Region, China after thallium pollution three years later, and to evaluate the health risk of local residents.Methods In 2016, a village along a river where a thallium pollution event had occurred in 2013 were selected as the polluted area, and a natural village along the upstream of the polluted river section were selected as the control area. Well water samples, soil samples, land-produced food samples, and urine samples from local residents aged between 18 and 75 years were collected to measure thallium levels by ICP-MS.Results Compared with the control area, the polluted area had a significantly higher thallium level in well water(median: not detected vs 0.290 μg/L, z =-6.51, P <0.01), a significantly lower qualified rate of thallium in well water(100.0% vs 24.6%, χ~2 = 42.48, P <0.01), a significantly higher thallium level in soil(median: 0.595 vs 0.755 mg/kg, z =-2.02, P <0.05), and a significantly higher thallium level in food(median: 0.250 vs 1.861 μg/kg, z =-4.14, P <0.01). There was no significant difference in urinary thallium content among residents in the polluted area and those in the control area(geometric mean: 0.70 vs 0.67 μg/g creatinine, F = 1.18, P >0.05).Conclusion Residents in the polluted area are exposed to thallium to a certain extent, but their urinary thallium level is similar to that of residents in the control area.更多还原