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“黑色”非晶形三价铁羟基氧化物及其对有害物质的吸附(英文) 被引量：1

Black ferric oxyhydroxide and its sorption of toxic substances
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摘要 利用硝酸铁与氨水之间的水解反应,生成了一种新的“黑色”非晶形三价铁羟基氧化物(FeOOH)该物质在室温下稳定,有较高的硬度,其比表面积约为300m2/g,零电荷点(PZC)在pH7～8之间根据Mssbauer谱的鉴定,它具有四方纤铁矿(β-FeOOH)的结构特征FeOOH和它与各溶质的表面配合物的X射线光电光谱结果表明,FeOOH与Pb、Zn和CrO2-4之间的反应是物理吸附,而与PO3-4和AsO3-4之间的反应是化学吸附3个阴离子及2个阳离子的吸附等温式结果表明,该三价铁羟基氧化物的吸附能力比常见的铁羟基氧化物强3倍磷酸盐与砷酸盐之间的竞争反应结果表明,磷酸盐与FeOOH的反应比砷酸盐强烈。 A n ovel form of amorphous black ferric oxyhydroxide (FeOOH) has been synthesized by hydrolysis of ferric nitrate with ammonia. This material is hard, stable at roo m temperature, has the local structure of akaganeite (? FeOOH) according to co nversion electron Mssbauer results, fractures conchoidally, has a specific sur face area around 300 m2/g and a point of zero charge at a pH around 7. X-ray ph otoelectron spectra of FeOOH and its surface complexes suggest that the interact ion between FeOOH and two cations, Pb and Zn, and constitutes physisorption, whe reas that between FeOOH and two oxyanions, and chemisorption. The adsorption iso therms of three oxyanions, chromate, phosphate, and arsenate and two cations lea d and zinc indicate that the absolute adsorption characteristics are about three times higher than those of conventional ferric oxyhydroxides. Competitive exper iments between phosphate and arsenate show that the phosphate-FeOOH substrate i nteraction is energetically favored over the arsenate one.
作者 M.Ding B.H.W.S.de Jong S.J.B.Niessen J.P.M.van der Meer V.J.van Hinsberg
机构地区 Los Alamos National Laboratory
出处 《地球化学》 CAS CSCD 北大核心 2005年第1期41-50,共10页 Geochimica
关键词 “黑色”非晶形三价铁羟基氧化物 有害物质 吸附 x射线光电光谱 重金属 环境吸附剂 ferric oxyhydroxide sorption XPS heavy metals environmental sor bent surface acid/base character
分类号 X703 [环境科学与工程—环境工程]
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参考文献40

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同被引文献63

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地球化学
2005年 第1期

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