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

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

Al 含量和合成温度对 Al 取代 Fe 氧化物的影响:晶体性质和 Fe(III) 生物可利用性

DOI:
10.1097/ss.0000000000000092
复制
发表时间:
2014-10
期刊:
影响因子:
--
通讯作者:
Liu, Hong
Liu, Hong
中科院分区:
农林科学4区
文献类型:
--
作者:
Li, Xiaomin;Li, Fangbai;Tao, Liang;Liu, Hong

文献摘要

参考文献

相似文献

摘要 在不同温度下合成了不同Al含量的4个系列的Al取代Fe氧化物并对其进行表征,研究Al取代对Fe氧化物晶体性质和生物可及性的影响。紫外-可见漫反射光谱及其一阶导数表明,从红色到白色的颜色变化与铁氧化物和铝氧化物的可见光吸收有关。 X射线衍射结果表明,Fe氧化物中Al的存在除了阻碍烧结过程中磁赤铁矿向赤铁矿的晶体转变外,还阻碍磁赤铁矿和赤铁矿的形成。 Al 取代的 Fe 氧化物的 Brunauer-Emmett-Teller 表面积随着 Al 含量的增加和烧结温度的降低而增加。傅里叶变换红外光谱结果表明,形成了高Al含量的三水铝石。 Al取代的Fe氧化物的晶体结构、结晶度和表面积很大程度上取决于Al含量和烧结温度。还研究了 Al 对 Al 取代的 Fe 氧化物中羟胺可还原 Fe(III) 的影响。结果表明,在较高温度(>300℃)合成的高结晶度Fe氧化物中,Al取代Fe氧化物的羟胺还原性Fe(III)随着Al含量的增加而增加,而对于低烧结温度(180℃)的Fe氧化物,羟胺还原性Fe(III)随着Al含量的增加而降低。 Al 含量对羟胺还原性 Fe(III) 的影响归因于晶体结构、结晶度和表面结构的性质,所有这些都可以提供了解 Al 对天然土壤或沉积物铁反应性影响所需的详细信息。
Abstract 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°C) but decreased with increasing Al content for Fe oxides with a low sintering temperature (180°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.
DOI: 10.1346/ccmn.1983.0310507
发表时间: 1983-10
影响因子: 2.2
作者:
S. A. Fysh;P. Fredericks
通讯作者: S. A. Fysh;P. Fredericks
DOI: 10.1007/s11434-009-0475-x
发表时间: 2009-08
期刊: 科学通报(英文版)
影响因子: --
作者:
Zhou SG;Liu TX;Li XM;Feng CH;Li FB;Li YT
通讯作者: Li YT
DOI: 10.1128/aem.51.4.683-689.1986
发表时间: 1986-04-01
影响因子: 4.4
作者:
LOVLEY, DR;PHILLIPS, EJP
通讯作者: PHILLIPS, EJP
DOI: 10.1016/j.geoderma.2011.12.021
发表时间: 2012-03
期刊: Geoderma
影响因子: 6.1
作者:
Jianwei Li;D. Richter
通讯作者: Jianwei Li;D. Richter
DOI: 10.1346/ccmn.2003.0510307
发表时间: 2003-06-01
影响因子: 2.2
作者:
Torrent, J;Barrón, V
通讯作者: Barrón, V