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| 1 | Elemental Composition and Geochemical Characteristics of Iron-Manganese Nodules in Main Soils of China显示文摘Elemental composition and geochemical characteristics of iron-manganese nodules from nine main soils in China were studied by chemical and multivariate statistical analyses to better understand the reactions and functions of iron-manganese nodules in soils and sediment. Compared to the corresponding soils, Mn, Ba, Cd, Co and Pb had strong accumulation, Ni had moderate accumulation, while Ca, Cu, Fe, Na, P, Sr and Zn accumulated to a minor degree in the iron-manganese nodules. In contrast, Si, Al, K, Mg and Ti were reduced in the iron-manganese nodules. The contents of Ba, Cd, Co, Cu, Ni, Pb and Zn were positively and significantly correlated with that of MnO2 in the iron-manganese nodules, while the contents of Cr, Cu, Ni, Pb and Zn were positively and significantly correlated with that of Fe2O3 in soils. Based on a principle component analysis, the elements of iron-manganese nodules were divided into four groups: 1) Mn, Ba, Cd, Co, Cu, Li, Ni, Pb and Zn that were associated with Mn oxides, 2) Fe, Cr and P that were associated with Fe oxides, 3) Si, K, and Mg that were included in the elemental composition of phyllosilicate, and 4) Ca, Na, Al and Ti that existed in todorokite, birnessite, lithiophorite and phyllosilicate. It was suggested that accumulation, mineralization and specific adsorption were involved in the formation processes of soil iron-manganese nodules. | TAN Wen-Feng LIU Fan LI Yong-Hua HU Hong-Qing HUANG Qiao-Yun | 2006 | Pedosphere2006，16，1： | 11 |
| 2 | 3种典型富锰沉积物的形貌学与矿物学特征显示文摘本文采集了3种典型的富锰沉积物样品,即岩石漆、树枝晶与土壤铁锰胶膜,并制作了相应的纵切片。运用光学显微镜、原位微区拉曼光谱仪、扫描电镜、EDX能谱仪分别对其形貌学与矿物学特征进行了研究。结果表明岩石漆呈黑色致密层状、葡萄状,主要由水钠锰矿、赤铁矿、针铁矿、粘土矿物等组成,是一种高度混杂的沉积物。宏观上岩石漆与基岩有截然的接触面,发育有微层理结构,在微观上的表现即锰含量的周期性波动。树枝晶呈黑色分枝状,主要由锰钡矿组成,极端富锰而贫硅铝,与基质呈交织结构。土壤铁锰胶膜呈黑色粘稠层状,由水钠锰矿、赤铁矿、针铁矿、钛铁矿、粘土矿物等组成,可细分为外层黑褐色的富锰条带和内层黄棕色的富铁条带。这3种富锰沉积物的形貌学和元素分布特征与各自的成因机制密切相关。 | 许晓明 李艳 丁竑瑞 李岩 鲁安怀 | 2017 | 岩石矿物学杂志2017，36，6： | 5 |
| 3 | 支持电解质对水钠锰矿表面Cu^2+吸附-解吸的影响显示文摘 | 谭文峰 王远鹏 刘凡 冯雄汉 | 2008 | 土壤学报2008，45，1： | 2 |
| 4 | 钙锰矿的研究进展显示文摘钙锰矿是土壤、沉积物及海洋锰结核中常见的以3×3结构为主的一族大隧道构造氧化锰矿物。隧道中存在水分子和阳离子,形貌以片状、针状或纤维状为主。水钠锰矿→布塞尔矿→钙锰矿的转化是钙锰矿形成的一个重要途径。这种转化在常压条件下受体系温度、pH、共存粘土矿物、转化时间以及前驱物布塞尔矿亚结构特点,如层间交换离子类型、浓度、以水合离子形态或与MnO6八面体空穴上方键合的强弱、结晶度、Mn(III)的含量与迁移特点等因素影响。钙锰矿独特的结构使其所具有的离子吸附、氧化与催化特性及分子级的隧道空间等有望作为特异的分子筛、二次电池正极材料、有机反应催化剂等在环境科学和材料科学等领域具有广阔的应用前景。 | 崔浩杰 冯雄汉 刘凡 谭文峰 邱国红 陈秀华 | 2009 | 地球科学进展2009，24，10： | 2 |
| 5 | 武汉黄棕壤铁锰氧化物胶膜的矿物学特征研究显示文摘铁锰氧化物矿物胶膜是我国黄棕壤中重要的铁锰元素富集载体,选取我国华中地区典型的铁锰氧化物矿物胶膜样品,采用电感耦合等离子体原子发射光谱(ICP-AES)、偏光显微镜(POM)、环境扫描电子显微镜(ESEM)、能谱仪(EDX)、高分辨透射电子显微镜(HRTEM)、高能量X射线粉末衍射(XRD)等研究方法,对原位和分离处理后的黄棕壤铁锰胶膜进行了详细的矿物学表征.结果表明,黄棕壤铁锰氧化物矿物胶膜由表及里,由外到内依次呈现富锰条带、富铁锰条带、富铁条带、富锰铁条带、富铁条带,并且锰铁元素含量之比不规则降低,其所含铁锰氧化物矿物主要为锰钡矿、针铁矿、水钠锰矿、六方水锰矿、水羟锰矿,粒度为纳米级,形貌多样. | 李岩 李艳 鲁安怀 王浩然 丁聪 杨晓雪 | 2016 | 岩石矿物学杂志2016，35，2： | 2 |
| 6 | Preparative Parameter Effects on Synthesis of Birnessite by O_2 Oxidation显示文摘Birnessite occurs in a wide variety of natural environments, and plays an important role in soil chemistry.A modified Stahli procedure was used to synthesize sodium birnessite in an alkali medium by O2 oxidation.The effects of preparative parameters on the synthesis of birnessite, such as pretreatment on solutions with N2,reaction temperature, O2 flow rate, fluxion velocity of the reaction suspension, and dehydration conditions were investigated. The fluxion velocity of the reactive suspension and O2 flow rate significantly influenced the synthesis of birnessite. Vigorous stirring raised the fluxion velocity of the reaction suspension and easily allowed synthesis of pure crystalline birnessite. However pretreatment of the reacting solutions with N2 and the reaction temperature had little effect on the synthesis. Diffusion of O2 was the controlling step during the course of oxidation. The optimum synthetic conditions for pure birnessite were: a NaOH to Mn molar ratio of 13.7, an O2 flow rate of 2 L min-1, and oxidation for 5 hours with vigorous stirring at normal temperatures. The chemical composition of the synthesized pure birnessite was Nao.25MnO2.07·0.66H2O. | FENGXiong-Han ZUYan-Qun TANWen-Feng LIUFan | 2004 | Pedosphere2004，14，1： | 0 |
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