Quintana G C, Mirlean N
Oceanography Institute, Federal University of Rio Grande, Av. Itália km 08 Campus Carreiros, 96201-900, Rio Grande, RS, Brazil.
Bull Environ Contam Toxicol. 2018 Jun;100(6):839-842. doi: 10.1007/s00128-018-2333-5. Epub 2018 Apr 4.
In the southernmost Brazilian city of Rio Grande, the chemical treatment of animal fur named carroting was performed between the eighteenth and twentieth century. This type of industry has led to contamination of urban soil with mercury down to the groundwater level. The present study has revealed that the dissolved mercury concentrations in groundwater in the mercury contaminated areas was up to 13 times higher than that found in the reference site. The association between SO, Ca and dissolved mercury indicate that urban man-made grounds composed by soil, construction and demolition waste, urban rubbish and mud contaminated by "carroting mercury" serve as a source of this metal to groundwater. Despite the high level of contamination, mercury concentrations found in groundwater were below the permissible level established for potable water. Most of the dissolved mercury was chemically combined, probably with organic matter.
在巴西最南端的城市里奥格兰德，18世纪至20世纪期间对动物皮毛进行了名为“加胡萝卜素处理”的化学处理。这类产业导致城市土壤被汞污染，污染甚至延伸到了地下水位。目前的研究表明，汞污染地区地下水中的溶解汞浓度比参考地点高出多达13倍。硫、钙与溶解汞之间的关联表明，由土壤、建筑和拆除废物、城市垃圾以及受“加胡萝卜素处理汞”污染的泥浆组成的城市人造地面是这种金属进入地下水的一个来源。尽管污染程度很高，但地下水中的汞浓度低于饮用水规定的允许水平。大部分溶解汞可能与有机物发生了化学结合。
