Faculty of Exact Sciences and Technology, Federal University of Grande Dourados, Dourados, MS, Brazil.
Faculty of Biological and Environmental Sciences, Federal University of Grande Dourados, Rua João Rosa Góes, 1761 - Vila Progresso, PO Box 322, Dourados, MS, 79.825-070, Brazil.
Environ Sci Pollut Res Int. 2019 Aug;26(24):24581-24594. doi: 10.1007/s11356-019-05662-5. Epub 2019 Jun 24.
Groundwaters are normally consumed without previous treatment and therefore the monitoring of contaminants in order to guarantee its safety is necessary. Thus, we aimed to evaluate the groundwater contamination by metals and emerging contaminants, seeking to understand the relationship between their presence in the groundwater and the use and land cover profile of Itaporã and Caarapó. In addition, the contaminant concentrations observed were compared with maximum permitted values (MPV) and/or with calculated water quality criteria (WQC) for human consumption to investigate possible human health risks due to the groundwater intake. We collected one groundwater sample from each of the 12 wells located in Itaporã and 11 wells located in Caarapó. The metals were analyzed using ICP-OES and the emerging contaminants using LC-MS/MS. At least 1 of the 9 metals analyzed was found in each of the samples. In 12 samples, the metal concentrations verified exceeded the MPV or calculated WQC. A risk to human health has been observed for metals Co, Mn, Cr, and Ni. The emerging contaminant concentrations found in some samples were low (ng/L) and probably did not pose health risks, but their presence in the groundwater showed the impact of agriculture and the inadequate disposal of domestic sewage in the wells of both cities.
地下水通常未经预处理就被消费，因此为了保证其安全，有必要对污染物进行监测。因此，我们旨在评估金属和新兴污染物对地下水的污染，以了解它们在地下水以及伊塔波拉和卡萨拉波的土地利用和土地覆盖类型中的存在与两者之间的关系。此外，还将观察到的污染物浓度与最大允许值 (MPV) 和/或人类消费的计算水质标准 (WQC) 进行了比较，以调查由于地下水摄入而可能对人类健康造成的风险。我们从伊塔波拉的 12 口井和卡萨拉波的 11 口井中各采集了一个地下水样本。使用 ICP-OES 分析金属，使用 LC-MS/MS 分析新兴污染物。在每个样本中都至少发现了 9 种金属分析物中的 1 种。在 12 个样本中，验证了金属浓度超过了 MPV 或计算的 WQC。Co、Mn、Cr 和 Ni 等金属对人类健康构成了风险。一些样本中发现的新兴污染物浓度较低（ng/L），可能不会对健康造成威胁，但它们在地下水中的存在表明了农业和城市两个地区的家庭污水处理不当对环境的影响。
