During the plutonium uranium reduction extraction (PUREX) process, nitric acid facilitates the extraction of actinides from the aqueous phase into the organic phase by forming neutral, organic soluble complexes with trin-butyl phosphate (TBP). The concentration of nitric acid is generally measured by titration; however, titration is a time-consuming method that generates significant volumes of additional waste. Optical spectroscopic techniques can be used to perform fast, automated measurements off-line or on-line, without generating any waste. In this work, the effectiveness of Raman and mid-infrared (MIR) spectroscopy has been compared for the first time as an alternative to titration for the quantification of nitric acid in PUREX-relevant mixtures. Samples of 0-12 M nitric acid in the aqueous phase and 0-1.10 M nitric acid in the organic phase (TBP/odourless kerosene (OK)- H2O-HNO3 model system) were analysed and partial least squares (PLS) regression models were built to predict nitric acid concentration. MIR spectra required less pre-processing than Raman spectra and more accurate predictions of nitric acid concentration were obtained for MIR spectroscopy than for Raman spectroscopy, with root mean square error of prediction (RMSEP) values of 0.099 M versus 0.148 M obtained for the aqueous phase and root mean square error of cross validation (RMSECV) values of 0.006 M versus 0.013 M obtained for the organic phase. To investigate the ability to predict nitric acid concentration in the presence of uranyl nitrate, samples containing uranium (0-100 g/L) and nitric acid (0.15-0.64 M) in the organic phase (U-TBP/OKH2O-HNO3 model system) were analysed by Raman and MIR spectroscopy. The RMSECV was 0.027 M and 0.066 M for MIR and Raman spectroscopy, respectively; these values are higher than those obtained in the absence of uranyl nitrate owing to differences in the experimental approaches employed. Therefore, the results obtained demonstrate that MIR or Raman spectroscopy could be used to measure the concentration of nitric acid in the organic and aqueous phases in the PUREX process.
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Passero, Alan
Ferreira, Karyn M.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Ferreira, Karyn M.
Diniz, Milton F.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Aeronaut & Espaco IAE, Div Prop, Dept Ciencia & Tecnol Aerosp DCTA, Praca Marechal Eduardo Gomes 50, BR-12228904 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Diniz, Milton F.
Sanches, Natalia B.
论文数: 0引用数: 0
h-index: 0
机构:
Ctr Univ St Anna UNISANTANNA, Rua Voluntarios Patria 257, BR-02011000 Sao Paulo, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Sanches, Natalia B.
Amado, Javier Carlos Q.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Sci & Tech Res Def CITEDEF, Appl Chem Dept, Ave JB de La Salle 4397,B1603ALO, Buenos Aires, ArgentinaInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Amado, Javier Carlos Q.
Dutra, Rita De Cassia L.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Dutra, Rita De Cassia L.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS,
2024,
96
(03):
机构:
Univ Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Fernandes de Oliveira Penido, Ciro Augusto
Tavares Pacheco, Marcos Tadeu
论文数: 0引用数: 0
h-index: 0
机构:
UAM, CITE, Parque Tecnol Sao Jose dos Campos, BR-12247016 Sao Jose Dos Campos, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Tavares Pacheco, Marcos Tadeu
Novotny, Etelvino Henrique
论文数: 0引用数: 0
h-index: 0
机构:
Brazilian Agr Res Corp EMBRAPA Solos, Rua Jardim Bot 1024, BR-22460000 Rio De Janeiro, RJ, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Novotny, Etelvino Henrique
Lednev, Igor K.
论文数: 0引用数: 0
h-index: 0
机构:
SUNY Albany, Dept Chem, 1400 Washington Ave, Albany, NY 12222 USAUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Lednev, Igor K.
Silveira, Landulfo, Jr.
论文数: 0引用数: 0
h-index: 0
机构:
UAM, CITE, Parque Tecnol Sao Jose dos Campos, BR-12247016 Sao Jose Dos Campos, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Passero, Alan
Ferreira, Karyn M.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Ferreira, Karyn M.
Diniz, Milton F.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Aeronaut & Espaco IAE, Div Prop, Dept Ciencia & Tecnol Aerosp DCTA, Praca Marechal Eduardo Gomes 50, BR-12228904 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Diniz, Milton F.
Sanches, Natalia B.
论文数: 0引用数: 0
h-index: 0
机构:
Ctr Univ St Anna UNISANTANNA, Rua Voluntarios Patria 257, BR-02011000 Sao Paulo, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Sanches, Natalia B.
Amado, Javier Carlos Q.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Sci & Tech Res Def CITEDEF, Appl Chem Dept, Ave JB de La Salle 4397,B1603ALO, Buenos Aires, ArgentinaInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Amado, Javier Carlos Q.
Dutra, Rita De Cassia L.
论文数: 0引用数: 0
h-index: 0
机构:
Inst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, BrazilInst Tecnol Aeronaut ITA, Div Ciencias Fundamentais, Dept Ciencia & Tecnol Aerosp DCTA, Dept Quim, Praca Marechal Eduardo Gomes 50, BR-12228900 Sao Jose Dos Campos, SP, Brazil
Dutra, Rita De Cassia L.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS,
2024,
96
(03):
机构:
Univ Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Fernandes de Oliveira Penido, Ciro Augusto
Tavares Pacheco, Marcos Tadeu
论文数: 0引用数: 0
h-index: 0
机构:
UAM, CITE, Parque Tecnol Sao Jose dos Campos, BR-12247016 Sao Jose Dos Campos, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Tavares Pacheco, Marcos Tadeu
Novotny, Etelvino Henrique
论文数: 0引用数: 0
h-index: 0
机构:
Brazilian Agr Res Corp EMBRAPA Solos, Rua Jardim Bot 1024, BR-22460000 Rio De Janeiro, RJ, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Novotny, Etelvino Henrique
Lednev, Igor K.
论文数: 0引用数: 0
h-index: 0
机构:
SUNY Albany, Dept Chem, 1400 Washington Ave, Albany, NY 12222 USAUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil
Lednev, Igor K.
Silveira, Landulfo, Jr.
论文数: 0引用数: 0
h-index: 0
机构:
UAM, CITE, Parque Tecnol Sao Jose dos Campos, BR-12247016 Sao Jose Dos Campos, SP, BrazilUniv Camilo Castelo Branco UNICASTELO, Rua Carolina Fonseca 584, BR-08230030 Sao Paulo, SP, Brazil