这项横断面研究的目的是比较在巴西利亚EstruturalDump附近使用头发(n=310)和指甲(n=355)作为暴露矩阵的431个废物采摘者的工作场所条件和金属暴露。拾荒者根据其工作场所进行分组(开放式废物堆放场:G1和分类工厂:G2)。收集头发和指甲样品并使用ICP-MS进行分析。设施的工作时间在两组之间存在显着差异,G1和G2的头发供体平均为16.46(8.48)年和9.26(6.28)年,脚趾甲供体分别为15.92(7.72)年和8.55(5.77)年。镉的算术平均值(μg/g),铜,铅,与G1(0.069±0.235;15.72±15.18;1.72±4.04和3.65±5.5)相比,G2(分别为0.076±0.133;19.61±18.16;2.27±0.56和3.87±5.59)中的锰显着更高。砷的浓度,钡,镉,铜,钴,铅,锰,与G1(0.40±0.28;15.32±22.31;0.08±0.11;11.91±16.25;0.08;1.80±13.0;相应的1.80±1.76)相比,G2(0.57±0.39;22.74±42.06;0.1±0.08;22.7±51.60;0.48±0.45;4.69±9.43;19.07±20.75;我们的研究结果表明,所研究的人群暴露于有毒金属,并表明需要采取化学暴露预防政策来监测拾荒者的化学风险暴露。
The aim of this cross-sectional study was to compare workplace conditions and metal exposures in 431 waste pickers who worked nearby at the Estrutural Dump in Brasilia utilizing hair (n = 310) and nail (n = 355) as matrices of exposure. Waste pickers were grouped according to their workplace (open waste dump: G1 and sorting plants: G2). Hair and nail samples were collected and analyzed using ICP-MS. The work duration in the facilities was significantly different between the groups with averages of 16.46 (8.48) yrs and 9.26 (6.28) yrs for hair donors in G1 and G2, and 15.92 (7.72) yrs and 8.55 (5.77) yrs for toenail donors in G1 and G2, respectively. The arithmetic means (μg/g) of cadmium, copper, lead, and manganese in hair were significantly higher in G2 (0.076 ± 0.133; 19.61 ± 18.16; 2.27 ± .56 and 3.87 ± 5.59, respectively) compared to G1 (0.069 ± 0.235; 15.72 ± 15.18; 1.72 ± 4.04 and 3.65 ± 5.5, respectively). Concentrations of arsenic, barium, cadmium, copper, cobalt, lead, manganese, and molybdenum in nail were significantly higher in G2 (0.57 ± 0.39; 22.74 ± 42.06; 0.1 ± 0.08; 22.7 ± 51.60; 0.48 ± 0.45; 4.69 ± 9.43; 19.07 ± 20.75; 1.80 ± 1.76, respectively) compared to G1 (0.40 ± 0.28; 15.32 ± 22.31; 0.08 ± 0.11; 11.91 ± 16.25; 0.37 ± 0.37; 3.94 ± 15.04; 13.01 ± 19.08; 1.16 ± 1.80, respective. Our findings suggest that the studied population was exposed to toxic metals and indicates the need for chemical exposure prevention policies to monitor chemical risk exposures in waste pickers.