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	Adsorption of phosphate on hydroxyaluminum- and hydroxyiron-montmorillonite complexes
	Zhu, Mao-Xu1; Ding, Kui-Ying1; Xu, Shao-Hui2; Jiang, Xin3
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2009-06-15
卷号	165期号:1-3页码:645-651
关键词	Hydroxyaluminum Hydroxyiron Montmorillonite Phosphate Adsorption
ISSN号	0304-3894
DOI	10.1016/j.jhazmat.2008.10.035
通讯作者	Zhu, Mao-Xu(zhumaoxu@ouc.edu.cn)
英文摘要	One hydroxyaluminum-montmorillonite complex (HyAl-Mt), two hydroxyiron-montmorillonite complexes (HyFe-Mts) with different iron contents, and three hydroxyiron/aluminum-montmorillonite complexes (HyFeAl-Mts) with various Fe:AI molar ratios were synthesized. Behavior and kinetics of phosphate (P) sorption on selected Mt-complexes mentioned above were investigated under acidic conditions. The results indicated that the intercalations of polymeric HyFe and/or HyAl ions in interlayers of Na- saturated montmorillonite (Na-Mt) caused significant changes in surface properties of the Na-Mt, Such as cation exchange capacity, specific surface area, pH at zero point of charge. In pH range tested (3.0-6.5), P adsorption on the Mt-complexes decreased with increasing pH, whereas the effect became weaker with increasing Fe contents in the Mt-complexes. The adsorption capacities of the HyFeAl-Mts were greater than those of the HyAl-Mt and HyFe-Mt, which could be attributed to decreasing crystallinity of Fe and Al oxides in the HyFeAl-Mts. The equilibrium adsorption of P on the Mt-complexes could be well described using the Langmuir isotherm, and the kinetics of P adsorption could be well described by both the pseudo-second-order and Elovich models. An increase in Fe contents in the Mt-complexes could enhance the initial kinetic rate of P adsorption, as suggested by the Elovich models. it is inferred that a great number of Fe-related active sorption sites have been located oil the outer surfaces of the HyFe-Mt, as indicated by extremely high alpha value in the Elovich model. Previous studies focusing mainly oil P sorption on HyAl-Mt complexes might have underestimated the contributions of Mt-complexes to P retention in acidic soils high in Fe contents. (C) 2008 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	BINARY OXIDE SUSPENSIONS ; ALUMINUM-IRON ; AL ; SURFACE ; DESORPTION ; BEHAVIOR ; SOILS ; FE ; FERRIHYDRITE ; ADSORBENTS
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000266121700085
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558807
专题	南京土壤研究所
通讯作者	Zhu, Mao-Xu
作者单位	1.Ocean Univ China, Key Lab Manine Chem Theory & Technol, Minist Educ, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China 2.Qingdao Univ, Dept Environm Sci & Engn, Qingdao 266100, Peoples R China 3.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Mao-Xu,Ding, Kui-Ying,Xu, Shao-Hui,et al. Adsorption of phosphate on hydroxyaluminum- and hydroxyiron-montmorillonite complexes[J]. JOURNAL OF HAZARDOUS MATERIALS,2009,165(1-3):645-651.
APA	Zhu, Mao-Xu,Ding, Kui-Ying,Xu, Shao-Hui,&Jiang, Xin.(2009).Adsorption of phosphate on hydroxyaluminum- and hydroxyiron-montmorillonite complexes.JOURNAL OF HAZARDOUS MATERIALS,165(1-3),645-651.
MLA	Zhu, Mao-Xu,et al."Adsorption of phosphate on hydroxyaluminum- and hydroxyiron-montmorillonite complexes".JOURNAL OF HAZARDOUS MATERIALS 165.1-3(2009):645-651.

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