重庆某再生铅企业周边铅尘污染分析与评价

以重庆市某再生铅企业周边为研究区域,根据当地气象与地形条件确定采样点,依据《环境空气质量手工监测技术规范》采集该区域的空气样本,依据《环境空气铅的测定火焰原子吸收分光光度法》测定样本中铅尘的浓度,分析了铅尘的空间分布特征及其影响因素。铅污染指数法评价结果表明,厂区周边环境空气中普遍存在着较严重的铅尘污染。重金属健康风险模型(CDI)评价结果表明,铅尘致癌风险指数范围2.05×10-6~1.51×10-5,非致癌风险度范围为0.012~0.031。基于IEUBK模型的健康风险评价表明,研究区域内儿童受体中血铅浓度超过100μg/L的概率为99.756%,存在较高的环境健康风险。

Analysis and Evaluation of Lead Dust Pollution Around a Secondary Lead Enterprise in Chongqing

Taking the surrounding of a secondary lead industry in Chongqing as research area, the sampling points were determined according to the local weather and terrain conditions, samples of air were collected based on the manual methods for ambient air quality monitoring, the concentration of Pb in dust samples was measured based on the Ambient air- Determination of lead-Flame Atomic Absorption spectrophotometric method, and the space distribution characteristic of lead dust was analyzed as well as its influence factors. The evaluating results of lead pollution index method indicate that, there is serious pollution of lead dust in ambient air. The results of Chronic Daily Intake (CDI) model show that, the carcinogenic risk index of lead dust ranges from 2.05×10-6 to 1.51×10-5, the no carcinogenic risk index ranges from 0.012 to 0.031. The assessment results based on the IEUBK model reveale that, the probability of lead concentration in blood more than 100μg/L is 99.756%, the children in the study region are at a higher risk of environmental health.