Effects of Al Content and Synthesis Temperature on Al-Substituted Fe Oxides: Crystal Properties and Fe(III) Bioaccessibility

doi:10.1097/SS.0000000000000092

CORC > 重庆绿色智能技术研究院 > 中国科学院重庆绿色智能技术研究院 > 水污染过程与治理研究中心

	Effects of Al Content and Synthesis Temperature on Al-Substituted Fe Oxides: Crystal Properties and Fe(III) Bioaccessibility
	Liu, Tongxu 1; Li, Xiaomin 1; Li, Fangbai 1; Tao, Liang 1; Liu, Hong2
刊名	SOIL SCIENCE
	2014-10-01
卷号	179 期号:10-11 页码:468-475
关键词	Al content temperature iron oxides crystal properties Fe(III) bioaccessibility
ISSN号	0038-075X
DOI	10.1097/SS.0000000000000092
通讯作者	Liu, TX (reprint author), Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China.
英文摘要	Four series of Al-substituted Fe oxides with different Al contents were synthesized under different temperatures and characterized to study the effects of Al substitution on the crystal properties and bioaccessibility of Fe oxides. The UV-visible diffuse-reflectance spectra and their first derivatives showed that color changes from red to white were associated with the visible absorbance of Fe oxides and Al oxides. The X-ray diffraction results showed that the presence of Al in Fe oxides could hinder the formation of maghemite and hematite in addition to the crystal transformation from maghemite to hematite during sintering. The Brunauer-Emmett-Teller surface areas of Al-substituted Fe oxides increased with increasing Al content and with decreasing sintering temperatures. Fourier transform infrared spectra results showed that gibbsite formed with high Al contents. The crystal structure, crystallinity, and the surface area of Al-substituted Fe oxides heavily depended on the Al content and the sintering temperature. The effects of Al on the hydroxylamine-reducible Fe(III) of Al-substituted Fe oxides were also investigated. The results showed that the hydroxylamine-reducible Fe(III) of Al-substituted Fe oxides increased with increasing Al content for the Fe oxides with a high degree of crystallization when synthesized at higher temperatures (>300 degrees C) but decreased with increasing Al content for Fe oxides with a low sintering temperature (180 degrees C). The effect of the Al content on hydroxylamine-reducible Fe(III) was attributable to the crystal structure, crystallinity, and the properties of surface structures-all of which can provide detailed information needed to understand the effect of Al on the iron reactivity of natural soils or sediments.
资助项目	National Natural Science Foundations of China[41471216] ; National Natural Science Foundations of China[41340018] ; National Natural Science Foundations of China[41271248] ; Natural Science Foundation of Guangdong Province, China[S2011030002882]
WOS研究方向	Agriculture
语种	英语
出版者	LIPPINCOTT WILLIAMS & WILKINS
WOS记录号	WOS:000351671000004
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/1589]
专题	水污染过程与治理研究中心
通讯作者	Liu, Tongxu
作者单位	1.Guangdong Inst Ecoenvironm & Soil Sci, Guangdong Key Lab Agr Environm Pollut Integrated, Guangzhou 510650, Guangdong, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Tongxu,Li, Xiaomin,Li, Fangbai,et al. Effects of Al Content and Synthesis Temperature on Al-Substituted Fe Oxides: Crystal Properties and Fe(III) Bioaccessibility[J]. SOIL SCIENCE,2014,179(10-11):468-475.
APA	Liu, Tongxu,Li, Xiaomin,Li, Fangbai,Tao, Liang,&Liu, Hong.(2014).Effects of Al Content and Synthesis Temperature on Al-Substituted Fe Oxides: Crystal Properties and Fe(III) Bioaccessibility.SOIL SCIENCE,179(10-11),468-475.
MLA	Liu, Tongxu,et al."Effects of Al Content and Synthesis Temperature on Al-Substituted Fe Oxides: Crystal Properties and Fe(III) Bioaccessibility".SOIL SCIENCE 179.10-11(2014):468-475.