Synthesis of hydrotalcite from seawater and its application to phosphorus removal

Tomohito Kameda; Toshiaki Yoshioka; Miho Uchida; Akitsugu Okuwaki

doi:10.1080/10426500212285

Synthesis of hydrotalcite from seawater and its application to phosphorus removal

Tomohito Kameda, Toshiaki Yoshioka, Miho Uchida, Akitsugu Okuwaki

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

10 Citations (Scopus)

Abstract

10.0 wt% milk of lime was added to seawater containing AlCl₃ at Mg/Al molar ratio of 3.0 until pH 10.5 with stirring, and kept at 25°C for 1 h. Hydrotalcite (HT) was precipitated as a single phase, and Mg²⁺ and Al³⁺ were quantitatively precipitated. The chemical composition was [Mg_0.75Al_0.25(OH)₂][(SO₄) _0.06(Cl)_0.02(OH)_0.11*]·0.27H ₂O* (*Balance). A 100 mg-P/L Na₂HPO₄ solution and the HT were shaken at 25°C. Phosphate removal increased with increasing time and the HT quantity, and was the highest at pH 7-9. Phosphate ion could be quantitatively removed, adding 8 times the stoichiometric quantity of the HT at pH 8.7 for 6 h.

Original language	English
Pages (from-to)	1503-1506
Number of pages	4
Journal	Phosphorus, Sulfur and Silicon and Related Elements
Volume	177
Issue number	6-7
DOIs	https://doi.org/10.1080/10426500212285
Publication status	Published - 2002

Keywords

Anion exchange
Hydrotalcite
Milk of lime
Phosphorus removal
Seawater
Synthesis

ASJC Scopus subject areas

Biochemistry
Organic Chemistry
Inorganic Chemistry

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10.1080/10426500212285

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@article{1e059c9f3f314ac7abf489049c6e6cff,

title = "Synthesis of hydrotalcite from seawater and its application to phosphorus removal",

abstract = "10.0 wt% milk of lime was added to seawater containing AlCl3 at Mg/Al molar ratio of 3.0 until pH 10.5 with stirring, and kept at 25°C for 1 h. Hydrotalcite (HT) was precipitated as a single phase, and Mg2+ and Al3+ were quantitatively precipitated. The chemical composition was [Mg0.75Al0.25(OH)2][(SO4) 0.06(Cl)0.02(OH)0.11*]·0.27H 2O* (*Balance). A 100 mg-P/L Na2HPO4 solution and the HT were shaken at 25°C. Phosphate removal increased with increasing time and the HT quantity, and was the highest at pH 7-9. Phosphate ion could be quantitatively removed, adding 8 times the stoichiometric quantity of the HT at pH 8.7 for 6 h.",

keywords = "Anion exchange, Hydrotalcite, Milk of lime, Phosphorus removal, Seawater, Synthesis",

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

year = "2002",

doi = "10.1080/10426500212285",

language = "English",

volume = "177",

pages = "1503--1506",

journal = "Phosphorus, Sulfur and Silicon and the Related Elements",

issn = "1042-6507",

publisher = "Taylor and Francis Ltd.",

number = "6-7",

}

TY - JOUR

T1 - Synthesis of hydrotalcite from seawater and its application to phosphorus removal

AU - Kameda, Tomohito

AU - Yoshioka, Toshiaki

AU - Uchida, Miho

AU - Okuwaki, Akitsugu

PY - 2002

Y1 - 2002

N2 - 10.0 wt% milk of lime was added to seawater containing AlCl3 at Mg/Al molar ratio of 3.0 until pH 10.5 with stirring, and kept at 25°C for 1 h. Hydrotalcite (HT) was precipitated as a single phase, and Mg2+ and Al3+ were quantitatively precipitated. The chemical composition was [Mg0.75Al0.25(OH)2][(SO4) 0.06(Cl)0.02(OH)0.11*]·0.27H 2O* (*Balance). A 100 mg-P/L Na2HPO4 solution and the HT were shaken at 25°C. Phosphate removal increased with increasing time and the HT quantity, and was the highest at pH 7-9. Phosphate ion could be quantitatively removed, adding 8 times the stoichiometric quantity of the HT at pH 8.7 for 6 h.

AB - 10.0 wt% milk of lime was added to seawater containing AlCl3 at Mg/Al molar ratio of 3.0 until pH 10.5 with stirring, and kept at 25°C for 1 h. Hydrotalcite (HT) was precipitated as a single phase, and Mg2+ and Al3+ were quantitatively precipitated. The chemical composition was [Mg0.75Al0.25(OH)2][(SO4) 0.06(Cl)0.02(OH)0.11*]·0.27H 2O* (*Balance). A 100 mg-P/L Na2HPO4 solution and the HT were shaken at 25°C. Phosphate removal increased with increasing time and the HT quantity, and was the highest at pH 7-9. Phosphate ion could be quantitatively removed, adding 8 times the stoichiometric quantity of the HT at pH 8.7 for 6 h.

KW - Anion exchange

KW - Hydrotalcite

KW - Milk of lime

KW - Phosphorus removal

KW - Seawater

KW - Synthesis

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U2 - 10.1080/10426500212285

DO - 10.1080/10426500212285

M3 - Article

AN - SCOPUS:0036020775

SN - 1042-6507

VL - 177

SP - 1503

EP - 1506

JO - Phosphorus, Sulfur and Silicon and the Related Elements

JF - Phosphorus, Sulfur and Silicon and the Related Elements

IS - 6-7

ER -

Synthesis of hydrotalcite from seawater and its application to phosphorus removal

Abstract

Keywords

ASJC Scopus subject areas

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