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1.
对吉林南部地区煤矿主采煤层中的As、B、Ba、Cd、Cu、Hg、Pb、Se、Sr等微量元素的分析结果表明，太原组与山西组由于成煤环境不同，微量元素组成及含量存在一定的差异：太原组原煤中As、B、Hg、Pb、Se、Zn的含量明显高于山西组，山西组原煤中Ba、Cr、Cu、Mn、V的含量明显高于太原组。吉南煤区原煤中As、B、Hg、Pb、Se明显高于地壳元素平均值，呈富集状态，Co、Cd与地壳平均值接近，其他元素均亏损。与全国煤中微量元素相比，该区原煤中As、Ba、Co、Cr、Cu、Hg、Ni、Pb、Se、V、Zn的含量高于全国平均值，B、Mn、Sr含量低于全国平均值。微量元素赋存状态及相关分析表明，Fe与亲硫有害元素As、Cu、Hg、Pb、Se具有显著相关关系，说明煤中黄铁矿及其他硫化物是许多有害微量元素的重要载体。 相似文献
2.
吉林白山地区原煤微量元素地球化学特征 总被引：2，自引：1，他引：1
对吉林白山地区煤矿主采煤层中的As、B、Ba、Cd、Cu、Hg、Pb、Se、Sr等微量元素进行了分析,结果表明:太原组与山西组由于成煤环境不同,微量元素组成及其质量分数存在一定的差异,太原组原煤中As、B、Hg、Pb、Se、Zn的质量分数明显高于山西组,山西组原煤中Ba、Cr、Cu、Mn、V的质量分数明显高于太原组。白山地区原煤中As、B、Hg、Pb、Se的质量分数明显高于地壳元素平均值,呈富集状态;Co、Cd与地壳平均值接近,其他元素均亏损。与全国煤中微量元素的质量分数平均值相比,As、Ba、Co、Cr、Cu、Hg、Ni、Pb、Se、V、Zn的质量分数高于全国平均值。B、Mn、Sr质量分数低于全国平均值。微量元素赋存状态及相关分析表明,Fe与亲硫有害元素As、Cu、Hg、Pb、Se具有显著相关关系,说明煤中黄铁矿及其他硫化物是许多有害微量元素的重要载体。 相似文献
3.
以淮南煤田深部A 组煤为研究对象,全层刻槽采集了煤、夹矸和顶底板岩石样品,采用电感耦合等离子质谱仪
（ICP-MS） 测试分析了样品中13 种有害微量元素的含量,对比研究了其分布特征,结合Tessier 五步形态提取法和相关性分
析探讨了煤中有害微量元素的赋存形态。结果表明：（1） 与中国上陆壳中各种微量元素含量均值相比,淮南深部A 组煤中
B,As,Se,Mo,Cd,Pb,Hg 的富集系数均大于1,在A 组煤中表现为富集;A 组煤中B,As,Se,Cd 的含量均高于淮南煤
田上部B 组煤、华北煤以及中国煤中的含量均值;（2） 相关性分析和逐级提取实验结果表明,A 组煤中微量元素主要以残
渣态和铁锰氧化物结合态存在,两者质量分数之和达到55%~98%,其中Ni,Mo,Cd,Hg,Cu,Pb 和Zn 主要赋存于硫化物
矿物中,Mn 主要赋存于碳酸盐矿物中,V,Cr,Se,B 和As 主要赋存于硅铝酸盐等黏土矿物中。（3） B 元素示踪物源及沉
积环境结果显示,淮南煤田深部A 组煤成煤环境为海相咸水沉积环境,稳定的咸水沉积环境以及受海水影响等因素导致A
组煤中微量元素出现不同程度的富集。 相似文献
4.
基于地统计学和GIS相结合的方法，对承德全域表层土壤重金属As、Cd、Cr、Cu、Hg、Ni、Pb、Zn、微量元素Se正态分布特征、主导分布趋势及相互作用规律进行了分析，确定了不同元素最适宜的地统计插值模型并厘定出其空间分布规律。结果表明:As、Cd、Cr、Cu、Hg、Ni、Pb、Zn的质量含量平均值分别为8.28，0.200，60.85，24.37，0.034，27.76，26.65，77.10 mg/kg，Cd、Cu、Hg和Pb变异系数分别为385%、143%、350%、118%，分异性强。Zn含量均值受土壤类型影响显著，Cr、Cu、Ni含量均值则受土地利用类型影响显著。经过不同趋势阶数元素插值误差的综合对比，确定As、Cr、Pb、Zn、Ni、Se适宜选择无趋势参数，Hg和Cu适宜选择一阶趋势参数，而Cd适宜选择二阶趋势参数。As的理论模型为指数模型，主要受到结构性因素的影响；Cd、Cr、Cu、Hg、Ni、Pb、Zn、Se的理论模型为线性模型，主要受到随机性因素的影响。通过普通克里格插值图可见区内9种元素具有北低南高的特点，中部地区形成了一条较宽的Pb高值带，与Cd相似。按照含量分布特点，土壤中Cr和Ni、Cu和Hg、Zn和Pb、Se和Cd之间的高值空间展布区具有相似性且来源相同，仅As具有个性，分析结果与传统统计学结果数据保持部分一致性。 相似文献
5.
浙江省下寒武统荷塘组黑色页岩系地球化学特征 总被引：2，自引：0，他引：2
首次根据浙江省西北部荷塘组岩石样品的实测数据,提出了浙江省荷塘组黑色岩系6个岩性层的Pt、Pd、Au、Ag、Cu、As、Sb、Pb、Mo、Ni、V、P、U、B、Cd、Tl、Se、Zn元素的平均值,运用微量元素和稀土元素的配分模式探讨了成岩环境及元素高含量对环境的影响.荷塘组富集元素较多,富集程度高的有Mo、Se、Cd、Ag、Sb、U、As、P;较富集的有V、B、Cu、Tl、Zn,弱富集的为Au、Pt、Pb、Ni.综合地质地球化学特征研究认为,荷塘组黑色岩系具有寻找含钼、磷、矾和有色金属矿产的潜力. 相似文献
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7.
云南个旧矿区南部矿床原生晕垂直分带研究——以龙树脚矿段为例 总被引：5，自引：2，他引：5
矿床原生晕的垂直分带研究是寻找隐伏矿体和盲矿体的有效方法之一。本文通过对 30余种元素的分析 ,研究元素的分带指数、变化系数和变化指数梯度差 ,由此得出矿床原生晕由上至下的垂直分带为 :Mn Cd Zn Sn Cu Au Hg As( 1 82 0中段 ) ;Bi W Co Sb( 1 730中段 ) ;Mo Y( 1 70 0中段 ) ;Ni V Nb Sr La Sc Ti Yb Be Ag( 1 6 4 0中段 ) ;Pb Ga B Ba( 1 5 2 0中段 )。 30种元素的分带序列为 :Mn Ag1 Pb1 Cd Zn Sn Cu Au Hg As Bi W Co Sb Mo Y Ni V Nb Sr Cr La Sc Ti Yb Be Ag2 Pb2 Ga B Ba。 相似文献
8.
浙江省北部地区调查研究表明,受成土母质来源、土壤类型及其理化性质等因素的影响,土壤元素全量、有效量及其有效度表现为:1)低山丘陵岗地土壤中As,Cd,Mo,Pb和Se全量较高,As,Cd,Fe,Pb,Se和Zn有效量较高;而山前平原区土壤中Hg,Pb和Zn元素全量较高,由地表向深部的下降递度较小,显示为原始沉积成因特点。2)中酸性、富含有机质的红壤和水稻土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效度较高,水稻土Hg有效度最低;弱碱性或碱性、贫有机质的潮土和滨海盐砂土中As,Cd,Cu,Fe,Mn,Pb,Se,Zn等元素有效量较低,但B有效量及有效度均较高。3)统计分析表明,土壤中Mn,Cu,Zn,Mo,Cd,Pb,Se等元素全量与有效量间具显著正相关性,表明全量是有效量的重要影响控制因素;有机质含量与Fe,Cu,Zn,Cd,As和Pb有效度间为显著正相关,说明有机质较高有利于土壤元素活化;Fe,Cu,Zn,Cd,As,Pb和Se有效度与pH值为显著负相关,表明土壤酸性增强(酸化)会增加这类元素的生物有效性。 相似文献
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10.
为了解酸性矿山排水（AMD）影响下水库沉积物中微量元素的质量分数水平及其分布特征，对常年受酸性废水影响的贵州兴仁猫石头水库沉积物中26种微量元素的质量分数、相关性及控制因素进行了分析。结果表明：猫石头水库沉积物柱中Sr、Ba、Zr、V、Cr和As质量分数平均值超过了100 μg/g，其中As质量分数最高，平均值超过800 μg/g；Be、Ta、Co、Ag、Cd、Sn和Se质量分数的平均值都在5 μg/g以下；其他元素质量分数平均值则在10~60 μg/g之间。相较未受AMD影响的水系沉积物，研究区水库沉积物具有明显的As和Sb富集特征。水库沉积物中Li、Be、Rb、Sr、Cs、Ba、Sc、Y、Zr、Hf、Nb、Ta、Th之间存在显著正相关关系，而As与这些元素之间存在显著负相关关系。元素相关分析、因子分析及微量元素图解表明，Li、Be、Rb、Sr、Cs、Ba、Sc、Y、Zr、Hf、Nb、Ta、Th、Cr、Sb等元素受控于流域岩石化学风化和土壤物理侵蚀，这也是控制研究区元素分布最重要的因素，而Cu、Cd等重金属元素则与AMD对地层中元素的溶蚀析出和有机质等细颗粒物的吸附有关。另外，研究区重金属元素中，Cd、Cu、Pb、Cr、Zn的生态风险轻微，而As和Sb则具有很强的潜在生态风险。 相似文献
11.
Gülbin Gürdal 《International Journal of Coal Geology》2011,87(2):157-173
This study presents the concentrations and modes of occurrence of trace elements in 81 coal samples from the Çan basin of northwestern Turkey. The concentration of trace elements in coal were determined by inductively coupled plasma-mass spectrometry and inductively coupled plasma-atomic emission spectrometry. Additionally, traditional coal parameters were studied by proximate, ultimate, X-ray diffraction, and petrographic analyses. Twenty trace elements, including As, B, Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se Sn, Th, Tl, U, V, and Zn, receive much attention due to their related environmental and human health concerns. The Çan coals investigated in this study are lignite to sub-bituminous coal, with a broad range of ash yields and sulphur contents. The trace element concentrations show variety within the coal seams in the basin, and the affinities vary among locations. The concentrations of B, Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se, Sn, Tl, and Zn in Çan coals are within the Swaine's worldwide concentration range, with the exception of As, Th, U, and V. On the other hand, compared with world coals, the Çan basin coals have higher contents of As, B, Cu, Co, Mo, Pb, Th, U, V, and Zn. Based on statistical analyses, most of the trace elements, except for U, show an affinity to ash yield. Elements including As, Cd, Hg, Se, Cu, Mo, Ni, and Zn, show a possible association with pyrite; however, the elements Se, B, and Mo can be have both organic and inorganic associations. 相似文献
12.
Major and trace element composition of the Ordovician Obolus phosphorites and associated Dictyonema shales were determined by ICP-MS and chemical and microchemical elemental analyses. Relative to the phosphorites, the Dictyonema shales are substantially enriched in a variety of trace elements, except for As, Be, Co, Y, REE, Sr, and Pb. The Obolus phosphorites show enrichment of As, Bi, Hg, Mo, La, Y, Pb, and Sr and depletion of Ag, Ba, Be, Cd, Cr, Cu, Hf, Ni, Sc, Sn, U, V, Zn, and Zr relative to the world average phosphorite composition. The average trace element composition of the Dictyonema shales is close to the mean shale composition, except for higher contents of Mo, Hg, Pb, Se, Ta, Te, Th, V, and U and lower contents of Ba, Bi, Cd, Co, Re, Sr, and Zn. The results suggest that the change from phosphate sedimentation in aerated environments to anoxic carbonaceous sedimentation was accompanied by changes in the composition and concentration of trace elements in the sediment. Both facies show similar trends of trace element distribution indicative of the stability of the composition of seawater and terrigenous sediment input. 相似文献
13.
《International Journal of Coal Geology》2007,69(3):179-191
The concentration, distribution and modes of occurrence of trace elements in thirty coals, four floors and two roofs from Northern China were studied. The samples were collected from the major coalfields of Shanxi Province, Shaanxi Province, Inner Mongolian Autonomous Region, and Ningxia Hui Autonomous Region. The concentrations of seventeen potential hazardous trace elements, including Hg, As, Se, Pb, Cd, Br, Ni, Cr, Co, Mo, Mn, Be, Sb, Th, V, U, Zn, and five major elements P, Na, Fe, Al, and Ca in coals were determined.Compared with average concentration of trace elements in Chinese coal, the coals from Northern China contain a higher concentration of Hg, Se, Cd, Mn, and Zn. They may be harmful to the environment in the process of combustion and utilization. Vertical variations of trace elements in three coal seams indicated the distributions of most elements in coal seam are heterogeneous. Based on statistical analyses, trace elements including Mo, Cr, Se, Th, Pb, Sb, V, Be and major elements including Al, P shows an affinity to ash content. In contrast, Br is generally associated with organic matter. Elements As, Ni, Be, Mo, and Fe appear to be associated with pyrite. The concentrations of trace elements weakly correlate either to coal rank or to maceral compositions. 相似文献
14.
The elemental composition of high temperature ash (750°C) and forms of S were studied in 25 coal seams from the Escucha Formation (Middle Albian) in the Teruel Mining District, northeast Spain. The principal analytical method was ICP-MS, but ICP-ES was also used in the determination of some trace elements. The analytical data show wide ranges of trace element cotnents among the coal seams studied, even in the vertical profile of a single coal seam. These wide ranges of the trace element concentrations are attributed to both syngenetic and epigenetic processes.When a comparison was made between the average trace element contents of the Teruel Mining District coals, and those of the average content in worldwide coals, the Teruel coals show slightly higher concentrations of Be and U, and lower concentrations of Ba, Cd, Mn, Pb, Sr and Zr. Further, three main groups of trace elements were differentiated on the basis of the inorganic/organic association: (1) trace elements with inorganic affinity; Ba, Ce, Co, Cr, La, Mn, Ni, Rb and Zr. Between these, Ba, Ce, Cr and Rb show a well defined correlation with the clay mineral content, and Co and Ni with pyritic-S content; (2) trace elements with an intermediate (mixed) affinity; As, Cd, Cu, Dy, Er, Eu, Gd, Ge, Ho, Lu, Mo, Nd, Pb, Pr, Sb, Sm, Sr, Tb, Th, Tm, U, Yb and Zn. In this group, As, Cd, Cu, Ge, Mo, Th, U and Zn show a weak trend associated with the mineral matter and Sr with the organic matter; and (3) Be shows an organic affinity. The high mineral matter content (21.3% HTA) of the Teruel coals may account for the great number of elements with inorganic affinity. This classification represents a general trend, but the results show that the affinities of some trace elements (e.g. As, Sb and Zn) may vary from one coal seam to another in the Teruel Mining District. 相似文献
15.
作物产量与土壤环境的关系 总被引：11，自引：1，他引：10
作物的产量与土壤元素中Ｎ、Ｐ、Ｋ、Ｎａ、Ｃａ、Ｍｇ、Ｓ、Ｆｅ、Ｍｎ、Ｃｕ、Ｚｎ、Ｂ、Ｍｏ、Ｖ、Ｃｏ、Ｎｉ、Ｃｒ、Ｐｂ、Ｃｄ、Ｈｇ、Ｓｅ、Ｆ、ＴＩ、Ｂａ、Ｔｅ、Ｔａ、Ｓｒ、Ｔｉ、Ｓｉ等元素及稀土、有机质、酸碱度和含水量、含盐量密切有关。 相似文献
16.
《International Journal of Coal Geology》2006,65(1-2):17-25
Two monitoring studies were carried out at four-year intervals on a power plant that uses western Canadian subbituminous coal and generates approximately 800 Mw/h of electricity. The distributions of elements of environment concern (As, Hg, Ni, Pb, and Cd) and elements of environmental interest (B, Ba, Be, Cl, Co, Cr, Cu, Mn, Mo, Th, Se, V, U, and Zn) in milled coals, power plant ashes, and emitted materials from the stack were determined using neutron activation analysis (NAA), Inductively Coupled Plasma Emission Spectroscopy (ICPES), and Inductively Coupled Plasma-Mass spectroscopy (ICP-MS) for most elements, Graphite Furnace Atomic Absorption (GFAA) for Pb, and Cold Vapor Atomic Absorption (CVAA) for Hg.The concentrations of most of elements in milled coal are low as compared to world coals and other Canadian milled coals. For example, in both studies mercury is within the lower range of world coal. Bottom ashes from both studies have low concentrations of As, Cd, Hg, Pb, and Zn, as well as low relative enrichment factors (RE) for the same elements, indicating that they were not enriched in the bottom ash. The ESP's remove most of the elements of environmental interest as indicated by their high RE ratios of greater than > 0.7.The rates of input of elements of environmental concern (As, Cd, Hg, Pb and Ni) for this station were 23.65, 1.24, 0.54, 98.2 and 95.2 kg/day, respectively, of which only 0.20, 0.02, 0.31, 0.48 and 0.36 kg/day were emitted from the stack. Thus only a small amount of these elements found in the milled coal was emitted while most were captured in the bottom and the ESP ashes. Nickel has the highest rate of emission (0.48 kg/day) within the elements of environmental concern group. However, the Ni emitted from this station does not belong to the toxic species. The element with the lowest rate of emission is Cd (0.02 kg/day). The total emission of elements of environmental concern is 1.37 kg/day, which is low as compared their ambient concentrations in either rural or urban air. The total rate of emission of B, Ba, Be, Co, Cr, Cu, Mn, Mo, Se, Th, U, V, and Zn is 56.51 kg/day and is mostly comprised of the total emission of Ba (21.73 kg/day) and Zn (19.14 kg/day). 相似文献