Marinho Jamile Salim, Lima Marcelo Oliveira, de Oliveira Santos Elisabeth Conceição, de Jesus Iracina Maura, da Conceição N Pinheiro Maria, Alves Cláudio Nahum, Muller Regina Celi Sarkis
Evandro Chagas Institute, 316 Km, 07 Road, Levilândia, 67030-000 Ananindeua, PA, Brazil ; Federal University of Pará, 01 Augusto Corrêa Street, Guamá, 66075-110 Belém, PA, Brazil.
Evandro Chagas Institute, 316 Km, 07 Road, Levilândia, 67030-000 Ananindeua, PA, Brazil.
Biomed Res Int. 2014;2014:945963. doi: 10.1155/2014/945963. Epub 2014 Mar 11.
Children from riverside communities located downstream of gold mining areas may be chronically exposed to relatively high levels of MeHg through the consumption of fish of this region. The objective of this study was to evaluate and compare levels of THg and MeHg in hair of children less than 12 years in communities near mines in the municipality of Itaituba and in communities far from prospecting areas in the city of Abaetetuba. The communities of Itaituba (Barreiras and São Luiz do Tapajós) had THg mean levels of 5.64±5.55 μg·g(-1) (0.43-27.82) and 11.41±7.16 μg.g(-1) (1.08-28.17), respectively, and an average count of MeHg relative to THg of 92.20% and 90.27%, respectively. In the Maranhão community, the THg average concentrations results were 2.27±2.11 μg·g(-1) (0.13-9.54) and the average values were 93.17% for MeHg. Children of Itaituba had average levels of mercury above the limit established by the World Health Organization (10 μg·g(-1)) and the strong correlation coefficient between the communities (R=0.968 and P=0.0001) suggests the hair as an excellent biomarker of human exposure to organic mercury in riverside populations of the Tapajós, which has the intake of fish daily as main source of protein dietary.
位于金矿开采区下游的河边社区的儿童，可能通过食用该地区的鱼类而长期接触相对高水平的甲基汞。本研究的目的是评估和比较伊塔图巴市矿区附近社区和阿贝泰图巴市远离勘探区社区12岁以下儿童头发中的总汞（THg）和甲基汞（MeHg）水平。伊塔图巴的社区（巴雷拉斯和圣路易斯杜塔帕约斯）的总汞平均水平分别为5.64±5.55 μg·g⁻¹（0.43 - 27.82）和11.41±7.16 μg·g⁻¹（1.08 - 28.17），甲基汞相对于总汞的平均占比分别为92.20%和90.27%。在马拉尼昂社区，总汞平均浓度结果为2.27±2.11 μg·g⁻¹（0.13 - 9.54），甲基汞平均值为93.17%。伊塔图巴的儿童汞平均水平高于世界卫生组织设定的限值（10 μg·g⁻¹），且各社区之间的强相关系数（R = 0.968，P = 0.0001）表明，头发是塔帕约斯河边人群中人类接触有机汞的优良生物标志物，该人群以每日食用鱼类作为主要蛋白质饮食来源。
