	US 11,964,884 B2
	System and method for removing nitrate from water
Wenzhen Li, Ames, IA (US); Hengzhou Liu, Ames, IA (US); and Yifu Chen, Ames, IA (US)
Assigned to IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Ames, IA (US)
Filed by Iowa State University Research Foundation, Inc., Ames, IA (US)
Filed on Mar. 8, 2021, as Appl. No. 17/195,321.
Claims priority of provisional application 62/986,402, filed on Mar. 6, 2020.
Prior Publication US 2021/0276891 A1, Sep. 9, 2021
Int. Cl. C02F 1/467 (2023.01); B01D 53/18 (2006.01); C01B 21/50 (2006.01); C02F 1/42 (2023.01); C02F 1/461 (2023.01); C02F 1/70 (2023.01); C02F 101/16 (2006.01); C02F 103/00 (2006.01); G01N 30/86 (2006.01)

CPC C02F 1/4676 (2013.01) [B01D 53/18 (2013.01); C02F 1/46109 (2013.01); C02F 1/70 (2013.01); G01N 30/8624 (2013.01); C01B 21/50 (2013.01); C02F 1/42 (2013.01); C02F 2001/422 (2013.01); C02F 2001/46133 (2013.01); C02F 2101/163 (2013.01); C02F 2103/007 (2013.01); C02F 2201/46115 (2013.01)]

20 Claims

1. A system for removal of nitrate from water, said system comprising:

a first reactor comprising a nanostructured oxide-derived silver (OD-Ag) electrode for electrocatalytic reduction of nitrate (NO₃⁻) to nitrite (NO₂⁻), wherein the nanostructured OD-Ag electrode comprises a surface, wherein said surface comprises a wave-like morphology, said wave-like morphology comprising peaks and valleys deviating ±250 nm from flatness and

a second reactor comprising a Pd-based catalyst for catalytic reduction of nitrite (NO₂⁻).