Occurrence, Structure and Mineral Phases of Nanoparticles in an Anthrosol

LU Sheng-Gao; SUN Fang-Fang; ZONG Yu-Tong

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Occurrence, Structure and Mineral Phases of Nanoparticles in an Anthrosol

机译：炭疽菌中纳米颗粒的存在，结构和矿物相

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Soils contain various kinds of crystalline to amorphous solid particles with at least one dimension in the nanoscale (＜ 100 nm).These nanoparticles contribute greatly to dynamic soil processes such as soil genesis,trace element cycling,contaminant transport,and chemical reaction.The nano-sized fraction of an Anthrosol was obtained to determine the occurrence,chemical composition,structure,and mineral phases of nanoparticles using high-resolution transmission electron microscopy (HRTEM) equipped with an energy-dispersive X-ray spectroscopy.Selected area electron diffraction or the fast Fourier transform of high-resolution images was used in structural characterization of the nanoparticles with HRTEM.Two nanoscale mineral types,i.e.,mineral nanoparticles and nanominerals,were observed in the Anthrosol.Mineral nanoparticles in soil included well crystalline aluminumsilicate nanosheets,nanorods,and nanoparticles.Nanosheets with a length of 120-150 nm and a width of about 10-20 nm were identified as chlorite/vermiculite series.The presence of clear lattice fringe spacing in HRTEM image of nanoparticles indicated that mineral nanoparticles had a relatively good crystallinity.The nanomineral ferrihydrite also existed in the Anthrosol.The HRTEM images and the particle size distribution histogram suggested that these ferrihydrite nanoparticles were quite homogeneous,and had a narrow size distribution range (1-7 nm) with a mean diameter of 3.6 ± 1.6 nm.Our HRTEM observation indicated that mineral nanoparticles and nanominerals were common and widely distributed in Anthrosols.HRTEM and selected area diffraction or lattice fringe spacing characterization provided further proofs to the structure of nanoparticles formed in soil.

机译：土壤包含至少在纳米尺度上（<100 nm）一维的各种晶体到无定形固体颗粒。这些纳米颗粒极大地促进了土壤动力学的动态过程，例如土壤发生，微量元素循环，污染物迁移和化学反应。使用配备有能量色散X射线光谱的高分辨率透射电子显微镜（HRTEM），获得了一定尺寸的蒽酚，以确定纳米颗粒的出现，化学组成，结构和矿物相。快速高分辨率图像的快速傅里叶变换用于HRTEM纳米颗粒的结构表征。在人为溶胶中观察到两种纳米级矿物类型，即矿物纳米颗粒和纳米矿物。土壤中的矿物纳米颗粒包括结晶性良好的硅酸铝纳米片，纳米线和鉴定出长度为120-150 nm，宽度约为10-20 nm的纳米片纳米粒子的HRTEM图像中存在清晰的晶格条纹间距，表明矿物纳米粒子具有相对良好的结晶度;炭矿中也存在纳米矿物三水铁矿.HRTEM图像和粒度分布直方图表明这些水铁矿纳米粒子非常均匀，尺寸分布范围窄（1-7 nm），平均直径为3.6±1.6 nm。我们的HRTEM观察表明，矿物纳米粒子和纳米矿物在炭疽菌中很常见且分布广泛。衍射或晶格条纹间距表征为在土壤中形成的纳米颗粒的结构提供了进一步的证据。

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《土壤圈（英文版）》 |2013年第3期|273-280|共8页
作者
LU Sheng-Gao; SUN Fang-Fang; ZONG Yu-Tong;
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作者单位

Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, College of Environmental and Resource Sciences,Zhejiang University, Hangzhou 310058,China;

Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058 China;

Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, College of Environmental and Resource Sciences,Zhejiang University, Hangzhou 310058,China;

Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058 China;

Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition, College of Environmental and Resource Sciences,Zhejiang University, Hangzhou 310058,China;

Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Occurrence, Structure and Mineral Phases of Nanoparticles in an Anthrosol

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