Simultaneous removal of NH4+ and PO43- in aqueous solution and its mechanism by using zeolite synthesized from coal fly ash

被引：44

作者：

Murayama, N ^{[1
]}

Yoshida, S ^{[1
]}

Takami, Y ^{[1
]}

Yamamoto, H ^{[1
]}

Shibata, J ^{[1
]}

机构：

[1] Kansai Univ, Dept Chem Engn, Suita, Osaka 5678680, Japan

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2003年 / 38卷 / 01期

关键词：

Ammonium compounds - Fly ash - Hydrothermal synthesis - Ion exchangers - pH - Phosphates - Reaction kinetics - Solutions - Water treatment;

D O I：

10.1081/SS-120016701

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The objective of this study is to investigate the cation exchange property of the product (zeolite P) synthesized from coal fly ash by alkali hydrothermal reaction, and to evaluate the water purification ability for simultaneous removal of NH4+ and PO43- in aqueous solution. Zeolite P crystal begins to be collapsed or to be dissolved with a decrease in aqueous pH. The cation exchange capacity of the product drastically decreases below pH 4. The simultaneous removal of NH4+ and PO43- can be achieved when NH4+ is exchanged by CaP zeolite and an insoluble salt is formed by the reaction between Ca2+ released from zeolite and PO43- in aqueous solution. From the above results, the effect of pH on cation exchange property of the product and the mechanism of simultaneous removal of NH4+ and PO43- in aqueous solutions are considered, respectively. The CaP zeolite used in this study, which can simultaneously remove NH4+ and PO43- has advantages compared with the other removal methods.

引用

页码：113 / 129

页数：17

共 14 条

[1] Removal of heavy metal ions from solutions by means of zeolites. I. Thermodynamics of the exchange processes between cadmium ions from solution and sodium ions from zeolite A [J].

Biskup, B ;

Subotic, B .

SEPARATION SCIENCE AND TECHNOLOGY, 1998, 33 (04) :449-466

[2]

HENMI T, 1989, Memoirs of the College of Agriculture Ehime University, V33, P143

[3]

Henmi T., 1994, NEW TECHNOL SCI, P3

[4]

*JAP FLY ASH ASS, 1995, COAL ASH HBD, V2, P1

[5]

LEE DB, 1998, J KOREAN SOC SOIL SC, V31, P67

[6] Mechanism of zeolite synthesis from coal fly ash by alkali hydrothermal reaction [J].

Murayama, N ;

Yamamoto, H ;

Shibata, J .

INTERNATIONAL JOURNAL OF MINERAL PROCESSING, 2002, 64 (01) :1-17

[7]

Murayama N., 2000, J MINING MAT PROCESS, V116, P31

[8]

MURAYAMA N, 2000, J MINING MAT PROCESS, V116, P509

[9]

MURAYAMA N, 2000, J MINING MAT PROCESS, V116, P279

[10]

NISHIKAWA Y, 1999, J MINING MAT I JAPAN, V115, P971

← 1 2 →