Triphosphate removal processes over ternary CaMgAl-layered double hydroxides

被引：26

作者：

Zhou, Ji Zhi ^{[2
]}

Xu, Zhi Ping ^{[1
]}

Qiao, Shizhang ^{[1
]}

Liu, Jianyong ^{[2
]}

Liu, Qiang ^{[2
]}

Xu, Yunfeng ^{[2
]}

Zhang, Jia ^{[2
]}

Qian, Guangren ^{[2
]}

机构：

[1] Univ Queensland, Australian Inst Bioengn & Nanotechnol, ARC Ctr Excellence Funct Nanomat, Brisbane, Qld 4072, Australia

[2] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

来源：

APPLIED CLAY SCIENCE | 2011年 / 54卷 / 3-4期

基金：

澳大利亚研究理事会;

关键词：

Triphosphate; Layered double hydroxide (LDH); Intercalation; Dissolution; Precipitation; HYDROTALCITE-LIKE COMPOUNDS; FRIEDEL PHASE; ION-EXCHANGE; TRIPOLYPHOSPHATE; INTERCALATION; HYDROLYSIS; ADSORPTION; PHOSPHATE; ANIONS; TRANSFORMATION;

D O I：

10.1016/j.clay.2011.08.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mg(2-x)Ca(x)Al-Cl-layered double hydroxides (LDHs, x = 0.0-2.0) were investigated as absorbents to remove triplepolyphosphate (triphosphate, TPP). The removal amount of TPP over Mg(2)Al-LDH was 35.3 mg(P)/g, due to the surface adsorption and intercalation while that over Ca(2)Al-LDH was 107.8 mg(P)/g LDH. attributed to the precipitation of dissolved Ca with TPP. The investigation of TPP removal over ternary Mg(2-x)Ca(x)Al-LDH (x = 0.5-1.5) demonstrated that TPP was removed predominantly either via the surface adsorption/intercalation (x = 0.5-1.0) or Ca-TPP precipitation (x = 1.5). This observation reveals that there is no synergic effect between these removal processes. The detail analyses of the aqueous solution and the solid materials suggest that the release of Al in the form of Al(OH)(4)(-) is responsible for the absence of synergy. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：196 / 201

页数：6

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