chemical dosing for water treatment system in brazil

chemical dosing for water treatment system in brazil
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  • Why is surface water contamination a problem in Brazil?
  • Available data on surface water contamination in Brazil show widespread occurrence of pesticides in natural waters, thereby putting pressure on the water treatment system and threatening the quality and safety of drinking water.
  • What are the main sources of chemical contamination in Brazilian drinking water?
  • Soil composition, mining, domestic sewage and agricultural activities: the main sources of chemical contamination in Brazilian drinking water (DW). Soil composition, mining, domestic sewage and agricultural activities: the main sources of chemical contamination in Brazilian drinking water (DW).
  • How many chemical contaminants are regulated in Brazil?
  • Twenty-one chemical contaminants are regulated throughout the Brazilian territory, through Annex XX in Ordinance Consolidation n° 5/2017 and two (flutriafol and epoxiconazole) only in Rio Grande do Sul territory, through state ordinance SES RS 320/2014.
  • Are there more chemicals used in water treatment?
  • A quick comparison of chemicals used in 1981 versus 2016 reveals that not only has the use of chemicals in water treatment increased, but also there are more chemicals used in water treatment than ever before. Fig. 1 depicts the growth in the water treatment chemicals market from the early 1990 s until now, and a forecast up to 2025. Fig. 1.