Mineralogical comparison of coal fly ash with soil for use in agriculture
Mineralogical comparison of coal fly ash with soil for use in agriculture
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DOI：
10.1007/s10163-014-0323-1
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发表时间：
2016-01-01
影响因子：
3.1
通讯作者：
Goyal, Dinesh
中科院分区：
文献类型：
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作者：
Kaur, Rajinder;Goyal, Dinesh
采用x射线衍射（XRD）、热重分析（TGA）、傅里叶变换红外光谱（FTIR）、能谱仪（EDS）和扫描电子显微镜（SEM）对粉煤灰与土壤、蒙脱土、木炭等材料进行了矿物学比较。热重分析（TGA）和扫描电镜（SEM）分析结果表明，粉煤灰具有较高的热稳定性和较小的失重，具有较大的相互作用表面积；XRD和EDS分析表明，灰分中无定形成分主要由氧化钙、钾组成，主要晶相为石英（SiO2）、铝硅氧化物（Al4.52Si1.48）和赤铁矿（Fe2O3）。木炭在自然界中是无定形的，由碳和石墨组成。土壤和蒙脱土的XRD、FTIR和热分析结果相似，均以二氧化硅为主要成分，具有多孔性。粉煤灰是碱性的，pH值为7.85，电导率为0.14 A μ S/m，与土壤、木炭、蒙土等其他材料相比，具有良好的持水量（62%）和多种常量和微量营养素，因此，其矿物组成确定了它作为农业土壤中不同微生物接种剂的载体的适用性，可以作为作物营养补充的经济来源。
Mineralogical comparison of coal fly ash with soil and other material such as montmorillonite, charcoal was done by X-ray diffraction (XRD), thermo gravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR) and Scanning electron micrograph (SEM) with EDS. Fly ash showed high thermal stability with least weight loss as observed in TGA and SEM graph indicated that flyash is composed of spherical structures with more surface area for interaction; XRD and EDS studies showed that amorphous content of ash consists of calcium oxide, potassium and major crystalline phases observed were quartz (SiO2) and aluminum silicon oxide (Al4.52Si1.48) and haematite (Fe2O3). Charcoal, was amorphous in nature consisting of carbon and graphite. Soil and montmorillonite showed similar results in XRD, FTIR and thermal analysis having porous nature with silica as major constituent. Fly ash was found to be alkaline in nature having pH 7.85 and electrical conductivity 0.14 A mu S/m, good water holding capacity (62 %) and various macro and micronutrients as compared to other material viz. soil, charcoal, montmorillonite and hence, its mineralogical composition ascertains its applicability as a carrier for different microbial inoculants for soil application in agriculture which can act as an economic source of nutrient supplement for crop plants.