摘要
综合型工业园具有工用和民用生产的双重功能,多领域的生产活动导致产生的污染物混杂且难以全面处理,可能造成更为广泛和严重的影响.本研究以成都市新津工业园及周围表层土壤环境为对象,分析其13种全氟化合物(PFASs)的浓度水平和空间分布特征.结果表明,该区域共有12种PFASs被检出,E12PFASs含量平均值为104.84 ng·g-1(dw).在检出的12种PFASs中,含量较高的为PFHpA(平均值为72.99 ng·g-1,占比70％,下同)与PFOA(29.25 ng·g-1,28％)是该地区主要PFASs污染物.普通克里金插值法(OK)结果显示,PFASs向园区北面方向有递增趋势,浓度偏高,呈现大范围高污染的带状分布特征.通过差异性和主成分分析,该地区土壤中PFASs污染来源主要为园区内的PFHpA相关工业生产活动通过烟囱进行的扩散排放和大气沉降,其次为日常生活中PFASs的产生和排放.基于CSOIL模型的风险评估分析表明,该地区PFOA和PFOS风险值较小,但PFHpA人体暴露量较高,需对其持续关注.
Abstract
Integrated industrial park has dual functions of industrial and civil production,generating complex pollutants that are difficult to be treated comprehensively and may cause more extensive and serious impacts.Concentration levels and spatial distribution characteristics of 13 PFASs in Xinjin Industrial Park and the surrounding surface soil were studied.In the present study,12 PFASs were detected with a mean concentration of 104.84 ng·g-1.PFHpA(mean value of 72.99 ng·g-1,70％)and PFOA(29.25 ng·g-1,28％)were the main PFASs.The Ordinary Kriging interpolation(OK)results showed that PFASs concentrations increased in the north direction of the park with a broad band distribution.Analysis of variance and principal component indicated that sources of PFASs contamination are mainly diffuse emissions and atmospheric deposition from PFHpA-related industrial production activities followed by the emission of daily use.The risk assessment analysis based on the CSOIL model displayed that the risk values of PFOA and PFOS in the region were at low level,but the human exposure to PFHpA is high and requires continuous attention.
基金项目
国家自然科学基金(21607018)
四川省科技计划(2021YJ0384)
大学生创新创业训练计划(202210621065)
NETL
NSTL
万方数据