Coal cleaning residues and Fe-minerals implications
Coal cleaning residues and Fe-minerals implications
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DOI：
10.1007/s10661-010-1340-8
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发表时间：
2011
影响因子：
3
通讯作者：
L. Silva;F. Macías;Marcos L. S. Oliveira;M. K. da Boit;F. Waanders
中科院分区：
文献类型：
--
作者：
L. Silva;F. Macías;Marcos L. S. Oliveira;M. K. da Boit;F. Waanders
在本次调查中，进行了一项研究，以了解巴西煤矿开采中的铁矿物的起源，并了解研究区域的环境影响和化学异质性。从圣卡塔里纳州的Lauro Muller、乌鲁桑加、Treviso、Siderópolis和Criciúma等城市采集了富含粘土、石英、硫化物、碳酸盐、硫酸盐等的洗煤残渣样品，共采集了19个样品，并对样品进行了穆斯堡尔谱、XRD、SEM/EDX和TEM分析。已鉴定的主要铁矿物为主要矿物黄铁矿、赤铁矿、伊利石和黄铁矿，而次要矿物包括铁白云石、黄铜矿、针铁矿、赤铁矿、黄钾铁矾、磁赤铁矿、磁铁矿、白铁矿、绿矾、钠黄钾铁矾、寡云母、磁黄铁矿、蔷薇辉石、施威特曼石、菱铁矿和菱铁矿。在某些情况下，黄铁矿相对丰富，在几个样品中占矿物质的10%左右。黄钾铁矾等硫酸盐矿物可能代表黄铁矿的氧化产物，在暴露或储存过程中形成。
In the present investigation, a study was undertaken to understand the origin of Fe-minerals presents in Brazilian coal mining and to understand the environmental implication and the chemical heterogeneity in the study area. Coal cleaning residue samples rich in clays, quartz, sulphides, carbonates, sulphates, etc. were sampled from Lauro Muller, Urussanga, Treviso, Siderópolis, and Criciúma cities in the Santa Catarina State and a total of 19 samples were collected and Mössbauer, XRD, SEM/EDX, and TEM analyses were conducted on the samples. The major Fe-minerals identified are represented by the major minerals chlorite, hematite, illite, and pyrite, while the minor minerals include, ankerite, chalcopyrite, goethite, hematite, jarosite, maghemite, magnetie, marcasite, melanterite, natrojarosite, oligonite, pyrrhotite, rozenite, schwertmannite, siderite, and sideronatrile. Pyrite is relatively abundant in some cases, making up to around 10% of the mineral matter in several samples. The sulphates minerals such as jarosite and others, probably represent oxidation products of pyrite, developed during exposure or storage.