The company Rio Tinto, which plans to open a lithium mine near Loznica, announced today that the report of the Environmental Protection Agency (SEPA) confirms its previously stated position that the change of water color in the pond (lake) in Gornji Nedeljice in the municipality of Slatina has nothing to do with what activities at the location he is researching, is already a consequence of the “blooming” of algae.
“The SEPE report is proof that the change of better water in the lake in the municipality of Slatina shows that it has nothing to do with any activities of Rio Tinto, but is a consequence of ‘blooming’ of algae, and the statements of individuals about the company as a cause of water change are incorrect.” it is stated in the announcement of that mining company.
It is added that the change in the color of the water occurred, as the SEPA report showed, due to the presence of the pigment astaxanthin from the group of carotenoids, whose mass development colors the water red.
SEPA, as it is stated, performed extraordinary sampling and testing of water quality from that pond from two localities, closer and further from the Atar road, both two meters away from the shore and 40 centimeters below the water surface, and did physico.chemical, chemical and biological analysis.
A report by the Agency published on its website, as stated by Rio Tinto, says that during the sampling and processing of the samples, a high water temperature was found, which is a consequence of high outside temperatures over a long period of time.
The investigated water locality is surrounded by agricultural arable land on which corn is planted, and those areas are treated with manure and artificial fertilizers (nitrogen or phosphorus).
During rainy periods (spring, autumn and winter) the soil is washed away and in that way nutrients from the soil reach watercourses, lakes and ponds and the results of analyzes show that lake water contains nutrients and total phosphorus that serve as a substrate, ie food for algae development. –
Analysis of phytoplankton in both localities revealed eutrophication and hypereutrophication, which are conditions that favored the “blooming” of water.
“One of the samples showed a red.orange color of water, which originates from the mass development of the Euglena sanguinea species, ie the ‘blooming’ of algae,” Rio Tinto said in a statement.