Recovery of ammonia and nitrate ion from ammonium nitrate in waste water by steam distillation adding lead(II) oxide

Miho Uchida; Noriyuki Minakata; Akitsugu Okuwaki

doi:10.1016/s0304-386x(96)00089-8

Recovery of ammonia and nitrate ion from ammonium nitrate in waste water by steam distillation adding lead(II) oxide

Miho Uchida, Noriyuki Minakata, Akitsugu Okuwaki

ENG - Applied Chemistry

Tohoku University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Recovery of NH₃ and NO^-₃ from concentrated NH₄NO₃ solutions was studied. Lead(II) oxide was added to 0.1-2 M NH₄NO₃ solutions at 373 K to precipitate basic lead(II) nitrates and to recover NH₃ simultaneously by steam distillation for 0.25-2 h. The effects of the molar ratio of PbO/NO^-₃ and steam distillation time on the removal of NO^-₃ and the recovery of NH₃, and on the composition of basic lead(II) nitrate were examined. The removal of NO^-₃ as Pb(NO₃)₂ · 5Pb(OH)₂ and the recovery of NH₃ reached about 100% at a PbO/NO^-₃ molar ratio of 4 for 1 h. Above 0.5 M NH₄NO₃, the removal of NO^-₃ was independent of the initial concentration of NO^-₃. Since the recovery of NH₃ was analogous to the removal of NO^-₃, effective removal of NH₃ was important to precipitate nitrate ion as basic lead(II) nitrates. Under the experimental conditions, basic lead(II) nitrates, 2Pb(NO₃)₂ · 5Pb(OH)₂, Pb(NO₃)₂ · 3Pb(OH)₂ and Pb(NO₃)₂ · 5Pb(OH)₂ were formed in single phase or mixed phase.

Original language	English
Pages (from-to)	239-247
Number of pages	9
Journal	Hydrometallurgy
Volume	45
Issue number	3
DOIs	https://doi.org/10.1016/s0304-386x(96)00089-8
Publication status	Published - 1997 Jul

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title = "Recovery of ammonia and nitrate ion from ammonium nitrate in waste water by steam distillation adding lead(II) oxide",

abstract = "Recovery of NH3 and NO-3 from concentrated NH4NO3 solutions was studied. Lead(II) oxide was added to 0.1-2 M NH4NO3 solutions at 373 K to precipitate basic lead(II) nitrates and to recover NH3 simultaneously by steam distillation for 0.25-2 h. The effects of the molar ratio of PbO/NO-3 and steam distillation time on the removal of NO-3 and the recovery of NH3, and on the composition of basic lead(II) nitrate were examined. The removal of NO-3 as Pb(NO3)2 · 5Pb(OH)2 and the recovery of NH3 reached about 100% at a PbO/NO-3 molar ratio of 4 for 1 h. Above 0.5 M NH4NO3, the removal of NO-3 was independent of the initial concentration of NO-3. Since the recovery of NH3 was analogous to the removal of NO-3, effective removal of NH3 was important to precipitate nitrate ion as basic lead(II) nitrates. Under the experimental conditions, basic lead(II) nitrates, 2Pb(NO3)2 · 5Pb(OH)2, Pb(NO3)2 · 3Pb(OH)2 and Pb(NO3)2 · 5Pb(OH)2 were formed in single phase or mixed phase.",

author = "Miho Uchida and Noriyuki Minakata and Akitsugu Okuwaki",

year = "1997",

month = jul,

doi = "10.1016/s0304-386x(96)00089-8",

language = "English",

volume = "45",

pages = "239--247",

journal = "Hydrometallurgy",

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AU - Uchida, Miho

AU - Minakata, Noriyuki

AU - Okuwaki, Akitsugu

PY - 1997/7

Y1 - 1997/7

N2 - Recovery of NH3 and NO-3 from concentrated NH4NO3 solutions was studied. Lead(II) oxide was added to 0.1-2 M NH4NO3 solutions at 373 K to precipitate basic lead(II) nitrates and to recover NH3 simultaneously by steam distillation for 0.25-2 h. The effects of the molar ratio of PbO/NO-3 and steam distillation time on the removal of NO-3 and the recovery of NH3, and on the composition of basic lead(II) nitrate were examined. The removal of NO-3 as Pb(NO3)2 · 5Pb(OH)2 and the recovery of NH3 reached about 100% at a PbO/NO-3 molar ratio of 4 for 1 h. Above 0.5 M NH4NO3, the removal of NO-3 was independent of the initial concentration of NO-3. Since the recovery of NH3 was analogous to the removal of NO-3, effective removal of NH3 was important to precipitate nitrate ion as basic lead(II) nitrates. Under the experimental conditions, basic lead(II) nitrates, 2Pb(NO3)2 · 5Pb(OH)2, Pb(NO3)2 · 3Pb(OH)2 and Pb(NO3)2 · 5Pb(OH)2 were formed in single phase or mixed phase.

AB - Recovery of NH3 and NO-3 from concentrated NH4NO3 solutions was studied. Lead(II) oxide was added to 0.1-2 M NH4NO3 solutions at 373 K to precipitate basic lead(II) nitrates and to recover NH3 simultaneously by steam distillation for 0.25-2 h. The effects of the molar ratio of PbO/NO-3 and steam distillation time on the removal of NO-3 and the recovery of NH3, and on the composition of basic lead(II) nitrate were examined. The removal of NO-3 as Pb(NO3)2 · 5Pb(OH)2 and the recovery of NH3 reached about 100% at a PbO/NO-3 molar ratio of 4 for 1 h. Above 0.5 M NH4NO3, the removal of NO-3 was independent of the initial concentration of NO-3. Since the recovery of NH3 was analogous to the removal of NO-3, effective removal of NH3 was important to precipitate nitrate ion as basic lead(II) nitrates. Under the experimental conditions, basic lead(II) nitrates, 2Pb(NO3)2 · 5Pb(OH)2, Pb(NO3)2 · 3Pb(OH)2 and Pb(NO3)2 · 5Pb(OH)2 were formed in single phase or mixed phase.

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JO - Hydrometallurgy

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Recovery of ammonia and nitrate ion from ammonium nitrate in waste water by steam distillation adding lead(II) oxide

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