Removal of nitrate nitrogen from water by phosphotungstate-supported TiO2 photocatalytic method

Reaction mechanism and selectivity regulation of photocatalytic nitrate reduction for wastewater purification: progress and challenges

“…Especially, nitrate and its metabolic by-product nitrite are the main cause of methemoglobinemia which is also named the blue baby syndrome, tissue hypoxia and cancer. 11–13 To minimize the harm caused by nitrate, the World Health Organization (WHO) and U.S. Environmental Protection Agency (EPA) have stipulated that nitrate concentration should be limited to 10 mg N L −1 in drinking water. 14–16…”

“…Especially, nitrate and its metabolic by-product nitrite are the main cause of methemoglobinemia which is also named the blue baby syndrome, tissue hypoxia and cancer. [11][12][13] To minimize the harm caused by nitrate, the World Health Organization (WHO) and U.S. Environmental Protection Agency (EPA) have stipulated that nitrate concentration should be limited to 10 mg N L À1 in drinking water. [14][15][16] In order to remove excess nitrate from the drinking water to meet the requirements of human health, various technologies have been applied to eliminate nitrates, such as biological denitrication, [17][18][19] chemical reduction, 20,21 reverse osmosis, [22][23][24][25] electrodialysis, [26][27][28][29][30] ion exchange, [31][32][33] electrocatalysis 34 and photocatalysis.…”