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

Nitrate nitrogen in water, especially in groundwater, is a major problem in the current drinking water environment. In this study, copper- and nickel-modified phosphotungstate catalysts supported on TiO 2 were prepared by the sol-gel solvothermal method, and photocatalytic reduction by phosphotungst...

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Bibliographic Details
Published in:Environmental science and pollution research international 2020-11, Vol.27 (32), p.40475-40482
Main Authors: Ge, Xiaohong, Fu, Weizhang, Wang, Yujun, Wang, Lingsheng, Yao, Fanfeng
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Catalysts
Copper
Drinking behavior
Drinking water
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Groundwater
Irradiation
Nickel
Nitrate removal
Nitrates
Nitrogen
Nitrogen removal
Photocatalysis
Reaction time
Research Article
Sol-gel processes
Titanium dioxide
Ultraviolet radiation
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Nitrate nitrogen in water, especially in groundwater, is a major problem in the current drinking water environment. In this study, copper- and nickel-modified phosphotungstate catalysts supported on TiO 2 were prepared by the sol-gel solvothermal method, and photocatalytic reduction by phosphotungstate was used to remove nitrate nitrogen in water under ultraviolet irradiation. The maximum removal rate was 59.60% with 0.8 g/L Cu-H 3 PW 12 O 40 /TiO 2 , 90 mg/L nitrate nitrogen, and 60 min reaction time. For Ni-H 3 PW 12 O 40 /TiO 2 , the maximum removal rate of nitrate nitrogen was 54.58%, achieved with a catalyst concentration of 0.8 g/L, nitrate nitrogen concentration of 120 mg/L, and reaction time of 30 min. Both catalysts could remove nitrate nitrogen from water under the condition of photocatalysis.
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-020-09947-y