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PHYSICOCHEMICAL METHODS OF NITRATES REMOVAL FROM WASTEWATER Cover

PHYSICOCHEMICAL METHODS OF NITRATES REMOVAL FROM WASTEWATER

Architecture, Civil Engineering, Environment
Volume 12 (2019): Issue 3 (September 2019)
By:  and    
Open Access
|Oct 2019
Figures & tables

Figures & Tables

Figure 1.

The effectiveness of chemical reduction of nitrate using nanoscale iron powder with different initial nitrate concentrations and the metal to solution ratio 4 g Fe0/dm3, [14]:

Figure 2.

Effects of pH on nitrate removal with iron powder (160–200 mesh). Test conditions: 20 g Fe0/dm3 and 50 mg/dm3 NO3-N solutions, [5]

Figure 3.

Concentration of nitrate with iron powder (160–200 mesh). Metal to solution ratio 4 g Fe0/dm3. Initial pH 2, [5]

Reducing agents for nitrate chemical reduction, [5]

Reducing agentE°, VpHNitrogen conversion productsOther by-productsProcess indicators
Al (metal) -2.30AlkalineNH2, NO2- , N2 Al.(OH)3 -
Fe (metal) -0.037AcidicNO2- Fe3+ -
-0.771AlkalineN2 Fe2O3, OH- -
Zn (metal) -1.245AlkalineNH3, NO2-, N2 Zn(OH)2 Catalysator
NH4+ +0.27AcidicN2O, N2 -High pressure and temperature, Cl- ions
HCO2H -0.199AcidicN2O, N2, NH3 CO2 Rh/C
 AcidicN2 CO2, H2 High pressure and temperature
CH3OH +0.017AcidicNH4+HCO3- High pressure and temperature
NH3OH+ -0.05AcidicN2O--
NH2OH -1.05AlkalineN2OOH- Cu2+
Fe2+ +0.771AcidicNO, N2O, N2 Fe3+ -
-0.56AlkalineNH3 Fe(OH)3, OH- Cu2+, Ag+

Effectiveness of electrochemical reduction in the presence of NaCl solution, [12]

no.Type of anodeNaCl concentration in solution [g/dm3]Initial nitrate-N concentration [g/dm3]Final nitrate-N concentration [mg/dm3]Reaction by-productsEffectiveness
1Ti/Pt0.7510024.6ammonia75.4%
21.0010023.8-76.2%
3Ti/IrO2 0.5010017.3ammonia82.7%
40.7510022.6-77.4%
DOI: https://doi.org/10.21307/acee-2019-046 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
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Language: English
Page range: 153 - 159
Submitted on: Jul 17, 2019
Accepted on: Aug 18, 2019
Published on: Oct 18, 2019
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Chemical reduction,
Chemical denitrification,
Nitrates,
Nitrates removal
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2019 Maciej ŻOŁNIERCZYK, Krzysztof BARBUSIŃSKI, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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