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Characterization of dolochar wastes generated by the sponge iron industry

International Journal of Minerals,Metallurgy and Materials 2012年第11期19卷 992-1003页

作者： Ranjan kumar Dwari Danda Srinivas Rao akhila kumar swar Palli Sita Ram Reddy Barada Kanta Mishra CSIR-Institute of Minerals and Materials Technology Odisha State Pollution Control Board

Solid wastes generated by the metallurgical industry contribute significantly towards the enhancement of environmental pollution. The handling, utilization, and safe disposal of these solid wastes are major concerns for the world. Dolochar is such a solid waste generated by the sponge iron industry. Investigations were carried out on the physical, mineralogical, and chemical characteristics for the efficient utilization of dolochar. The detailed studies on physico-chemical properties and petrography were carded out by optical microscopy, X-ray diffraction （XRD）, and scanning electron microscopy （SEM）. Characterization studies revealed that the dolochar consists of quartz （free as well as locked）, free lime, Fe particles, and Ca or Mg and/or Ca＋Mg＋Fe oxide phases. The washability data of-300 ~m dolochar samples indicated that clean coal with 41wt% ash at 18% yield can be produced from dolochar with 78wt% ash. The studies further suggested that the liberation of the dolochar is hard to achieve for clear separation. The dolochar is observed to have high ash fusion temperature and the un- burned carbon can be best utilized for power generation.

关键词： solid wastes sponge iron dolochar characterization mineralogy trace elements

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Integration of morpho-physico-biochemical traits with SSR and SRAP markers for characterization of castor genotypes of Indian origin

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Oil Crop Science 2022年第1期7卷 22-30页

作者： akhila S.R Sushil kumar Amar A.Sakure Dipak A.Patel Mukesh P.Patel Department of Agricultural Biotechnology Anand Agricultural UniversityAnand388110India Agriculture Research Station Anand Agricultural UniversityKhambholaj388330India

Castor(Ricinus communis L.)is an important tropical oilseed crop,whose oil has versatile,practical value,especially in *** present study aimed to estimate the nature and magnitude of variability in the castor germplasm concerning yield and its component traits and physico-biochemical *** yield per plant and oil content ranged from 80.90 g(ICS-165)to 248.30 g(RG-3216),and 34.7%(ICS-172)to 58.7%(JI-277),*** iodine value of oil ranged from 76.36(JI-370)to 89.84(P2-135)with an average value of *** mean saponification value of oil was *** genotypic and phenotypic coefficients of variation were high for acid value,capsules on the main raceme,seed yield per plant,and total length of the main raceme.A positive association of porosity,average unit volume,and total length of the main raceme with seed yield per plant showed that these characters might be directly attributed to seed yield *** Manhattan distances,the 30 genotypes were grouped into 3 *** genetic diversity was elucidated using SSR and SRAP *** marker produced higher mean number of total bands(5.71),polymorphic bands(4.57),percentage polymorphism(83.10%),PIC(1.72),RP(5.90),mean RP(1.02),MR(5.71),EMR(4.57)and MI(1.44)values when compared to SSR(2.89,2.11,79.63%,0.61,1.90,0.72,2.89,2.11 and 0.49,respectively)*** highest genetic distance(0.77)was between 48-1 and JI-370,which indicated that these genotypes could be used in biparental mating schemes,QTL map development,and hybridization programmes to increase oil content and quality for industrial purposes.

关键词： Diversity DNA marker Heritability Ricinus communis L. Oil

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