New method of treating dilute mineral acids using magnesium-aluminum oxide

Tomohito Kameda; Fumiko Yabuuchi; Toshiaki Yoshioka; Miho Uchida; Akitsugu Okuwaki

doi:10.1016/S0043-1354(02)00374-3

New method of treating dilute mineral acids using magnesium-aluminum oxide

Tomohito Kameda, Fumiko Yabuuchi, Toshiaki Yoshioka, Miho Uchida, Akitsugu Okuwaki

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

81 Citations (Scopus)

Abstract

Mineral acids, such as H₃PO₄, H₂SO₄, HCl, and HNO_3, were treated with magnesium-aluminum oxide (Mg-Al oxide), which behaved as a neutralizer and fixative of anions. Anion removal increased with increasing Mg-Al oxide quantity, time, Mg/Al molar ratio, and initial acid concentration. Up to 95% removal of anions was achieved in 0.5N acids using a stoichiometric quantity of Mg_0.80Al_0.20O_1.10 for H₃PO₄, 1.75 stoichiometric quantities for H₂SO₄, or 2.5 stoichiometric quantities for HCl or HNO₃ at 20°C over a period of 6h. The final solutions were found to have a pH in the range of 8-12. Selectivity of acid removal was found to follow the following order: H₃PO₄>H₂SO₄>HCl>HNO ₃. The equivalent of acid removal per 1g of Mg-Al oxide decreased as the Mg/Al molar ratio of Mg-Al oxide increased.

Original language	English
Pages (from-to)	1545-1550
Number of pages	6
Journal	Water Research
Volume	37
Issue number	7
DOIs	https://doi.org/10.1016/S0043-1354(02)00374-3
Publication status	Published - 2003 Apr

Keywords

Dilute mineral acid
Hydrotalcite
Intercalation
Mg-Al oxide
Treatment

ASJC Scopus subject areas

Ecological Modelling
Water Science and Technology
Waste Management and Disposal
Pollution

Access to Document

10.1016/S0043-1354(02)00374-3

Cite this

@article{531ee066e3d8492586e10b12450d89a7,

title = "New method of treating dilute mineral acids using magnesium-aluminum oxide",

abstract = "Mineral acids, such as H3PO4, H2SO4, HCl, and HNO3, were treated with magnesium-aluminum oxide (Mg-Al oxide), which behaved as a neutralizer and fixative of anions. Anion removal increased with increasing Mg-Al oxide quantity, time, Mg/Al molar ratio, and initial acid concentration. Up to 95% removal of anions was achieved in 0.5N acids using a stoichiometric quantity of Mg0.80Al0.20O1.10 for H3PO4, 1.75 stoichiometric quantities for H2SO4, or 2.5 stoichiometric quantities for HCl or HNO3 at 20°C over a period of 6h. The final solutions were found to have a pH in the range of 8-12. Selectivity of acid removal was found to follow the following order: H3PO4>H2SO4>HCl>HNO 3. The equivalent of acid removal per 1g of Mg-Al oxide decreased as the Mg/Al molar ratio of Mg-Al oxide increased.",

keywords = "Dilute mineral acid, Hydrotalcite, Intercalation, Mg-Al oxide, Treatment",

author = "Tomohito Kameda and Fumiko Yabuuchi and Toshiaki Yoshioka and Miho Uchida and Akitsugu Okuwaki",

year = "2003",

month = apr,

doi = "10.1016/S0043-1354(02)00374-3",

language = "English",

volume = "37",

pages = "1545--1550",

journal = "Water Research",

issn = "0043-1354",

publisher = "Elsevier Limited",

number = "7",

}

TY - JOUR

T1 - New method of treating dilute mineral acids using magnesium-aluminum oxide

AU - Kameda, Tomohito

AU - Yabuuchi, Fumiko

AU - Yoshioka, Toshiaki

AU - Uchida, Miho

AU - Okuwaki, Akitsugu

PY - 2003/4

Y1 - 2003/4

N2 - Mineral acids, such as H3PO4, H2SO4, HCl, and HNO3, were treated with magnesium-aluminum oxide (Mg-Al oxide), which behaved as a neutralizer and fixative of anions. Anion removal increased with increasing Mg-Al oxide quantity, time, Mg/Al molar ratio, and initial acid concentration. Up to 95% removal of anions was achieved in 0.5N acids using a stoichiometric quantity of Mg0.80Al0.20O1.10 for H3PO4, 1.75 stoichiometric quantities for H2SO4, or 2.5 stoichiometric quantities for HCl or HNO3 at 20°C over a period of 6h. The final solutions were found to have a pH in the range of 8-12. Selectivity of acid removal was found to follow the following order: H3PO4>H2SO4>HCl>HNO 3. The equivalent of acid removal per 1g of Mg-Al oxide decreased as the Mg/Al molar ratio of Mg-Al oxide increased.

AB - Mineral acids, such as H3PO4, H2SO4, HCl, and HNO3, were treated with magnesium-aluminum oxide (Mg-Al oxide), which behaved as a neutralizer and fixative of anions. Anion removal increased with increasing Mg-Al oxide quantity, time, Mg/Al molar ratio, and initial acid concentration. Up to 95% removal of anions was achieved in 0.5N acids using a stoichiometric quantity of Mg0.80Al0.20O1.10 for H3PO4, 1.75 stoichiometric quantities for H2SO4, or 2.5 stoichiometric quantities for HCl or HNO3 at 20°C over a period of 6h. The final solutions were found to have a pH in the range of 8-12. Selectivity of acid removal was found to follow the following order: H3PO4>H2SO4>HCl>HNO 3. The equivalent of acid removal per 1g of Mg-Al oxide decreased as the Mg/Al molar ratio of Mg-Al oxide increased.

KW - Dilute mineral acid

KW - Hydrotalcite

KW - Intercalation

KW - Mg-Al oxide

KW - Treatment

UR - http://www.scopus.com/inward/record.url?scp=0037399066&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037399066&partnerID=8YFLogxK

U2 - 10.1016/S0043-1354(02)00374-3

DO - 10.1016/S0043-1354(02)00374-3

M3 - Article

C2 - 12600382

AN - SCOPUS:0037399066

SN - 0043-1354

VL - 37

SP - 1545

EP - 1550

JO - Water Research

JF - Water Research

IS - 7

ER -

New method of treating dilute mineral acids using magnesium-aluminum oxide

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this