重金属污染、基于受体模型的污染源识别、污染源特定的生态和健康风险——以高度发达城市道路尘为例。
Heavy metals contamination, receptor model-based sources identification, sources-specific ecological and health risks in road dust of a highly developed city.
发表日期：2023 Sep 08
作者：
Mukta Das, Ram Proshad, Krishno Chandra, Maksudul Islam, Mamun Abdullah Al, Artho Baroi, Abubakr M Idris
来源：
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
摘要：
本研究量化了孟加拉国坦盖尔市多个地点收集的道路尘土中的镍、铜、铬、铅、镉、砷、锌和铁含量。本研究的目标是使用矩阵分解模型识别这些组分的特定来源，并评估与每个潜在来源相关的生态和健康风险。采用电感耦合等离子体质谱法确定了铜、镍、铬、铅、砷、锌、镉和铁的浓度。这些元素的平均浓度分别为30.77 ± 8.80、25.17 ± 6.78、39.49 ± 12.53、28.74 ± 7.84、1.90 ± 0.79、158.30 ± 28.25、2.42 ± 0.69和18,185.53 ± 4215.61 mg/kg。与顶级大陆地壳相比，铜、铅、锌和镉的平均值分别高出1.09倍、1.69倍、2.36倍和26.88倍。根据Nemerow综合污染指数（NIPI）、污染负荷指数（PLI）、Nemerow综合风险指数（NIRI）和潜在生态风险（PER），分别有84%、42%、30%和16%的采样区存在严重污染。PMF模型显示，铜（43%）、铁（69.3%）和镉（69.2%）主要来自混合源、自然源和交通排放。交通排放对修改后的NIRI和潜在生态风险构成了高风险和中等风险。基于计算的PMF模型健康风险指标显示，交通排放、自然源和混合源的癌症风险值均大于1.0E-04，表明可能存在癌症风险，而交通排放对成年男性的风险占38%，成年女性和儿童分别为37%。© 2023. The Author(s), under exclusive licence to Springer Nature B.V.
The present study quantified Ni, Cu, Cr, Pb, Cd, As, Zn, and Fe levels in road dust collected from a variety of sites in Tangail, Bangladesh. The goal of this study was to use a matrix factorization model to identify the specific origin of these components and to evaluate the ecological and health hazards associated with each potential origin. The inductively coupled plasma mass spectrometry was used to determine the concentrations of Cu, Ni, Cr, Pb, As, Zn, Cd, and Fe. The average concentrations of these elements were found to be 30.77 ± 8.80, 25.17 ± 6.78, 39.49 ± 12.53, 28.74 ± 7.84, 1.90 ± 0.79, 158.30 ± 28.25, 2.42 ± 0.69, and 18,185.53 ± 4215.61 mg/kg, respectively. Compared to the top continental crust, the mean values of Cu, Pb, Zn, and Cd were 1.09, 1.69, 2.36, and 26.88 times higher, respectively. According to the Nemerow integrated pollution index (NIPI), pollution load index (PLI), Nemerow integrated risk index (NIRI), and potential ecological risk (PER), 84%, 42%, 30%, and 16% of sampling areas, respectively, which possessed severe contamination. PMF model revealed that Cu (43%), Fe (69.3%), and Cd (69.2%) were mainly released from mixed sources, natural sources, and traffic emission, respectively. Traffic emission posed high and moderate risks for modified NIRI and potential ecological risks. The calculated PMF model-based health hazards indicated that the cancer risk value for traffic emission, natural, and mixed sources had been greater than (1.0E-04), indicating probable cancer risks and that traffic emission posed 38% risk to adult males where 37% for both adult females and children.© 2023. The Author(s), under exclusive licence to Springer Nature B.V.