Response to Letter to the Editor “Mineralogical phase separation and leaching characteristics of typical toxic elements in Chinese lignite fly ash”

Fly ash is an amorphous ferroalumino silicate, an important solid waste around thermal power plants. It creates problems leading to environmental degradation due to improper utilization or disposal. However, fly ash is a useful ameliorant that may improve the physical, chemical and biological properties of soils and is a source of readily available plant macro and micronutrients when it is used with biosolids. Supply of nutrients from fly ash with biosolids may enhance their agricultural use. The growth and reproduction ofEisenia fetidawas studied during vermicomposting of fly ash with cowdung and pressmud in four different proportions (T1,T2,T3& T4) and one controli.e.,cow dung and pressmud alone. The growth, cocoon and hatchlings production were observed at the interval of 15 days over a period of 60 days. The maximum worm growth and reproduction was observed in bedding material alone. Next to that the T1was observed as the best mixture for vermiculture.

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Evaluation of Synthetic Aggregate from Lignite Fly Ash

Transportation Engineering Journal of ASCE ◽

10.1061/tpejan.0000410 ◽

1974 ◽

Vol 100 (1) ◽

pp. 27-40

Author(s):

Roger L. Engelke ◽

William B. Ledbetter ◽

Bob M. Gallaway

Keyword(s):

Fly Ash ◽

Lignite Fly Ash

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Leaching characteristics of naturally derived toxic elements from soils in the western Osaka area: considerations from the analytical results under the Soil Contamination Countermeasures Act

Japanese Geotechnical Journal ◽

10.3208/jgs.15.119 ◽

2020 ◽

Vol 15 (1) ◽

pp. 119-130

Author(s):

Hiroko ITO ◽

Takeshi KATSUMI

Keyword(s):

Soil Contamination ◽

Toxic Elements ◽

Analytical Results ◽

Leaching Characteristics

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Environmental Impact Assessment of Lignite Fly Ash and Its Utilization Products as Recycled Hazardous Wastes on Surface and Ground Water Quality

The Handbook of Environmental Chemistry - Water Pollution ◽

10.1007/b11733 ◽

2005 ◽

pp. 61-110 ◽

Cited By ~ 13

Author(s):

Predrag S. Polic ◽

Marina R. Ilic ◽

Aleksandar R. Popovic

Keyword(s):

Water Quality ◽

Fly Ash ◽

Environmental Impact ◽

Impact Assessment ◽

Ground Water ◽

Environmental Impact Assessment ◽

Hazardous Wastes ◽

Ground Water Quality ◽

Lignite Fly Ash

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Assessment of strength and leaching characteristics of heavy metal–contaminated soils solidified/stabilized by cement/fly ash

Environmental Science and Pollution Research ◽

10.1007/s11356-019-06082-1 ◽

2019 ◽

Vol 26 (29) ◽

pp. 30206-30219 ◽

Cited By ~ 4

Author(s):

Fusheng Zha ◽

Chunjie Ji ◽

Long Xu ◽

Bo Kang ◽

Chengbin Yang ◽

...

Keyword(s):

Heavy Metal ◽

Fly Ash ◽

Contaminated Soils ◽

Leaching Characteristics

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Measuring Graphitic Carbon and Crystalline Minerals in Coals and Bottom Ashes

Advances in X-ray Analysis ◽

10.1154/s0376030800022151 ◽

1987 ◽

Vol 31 ◽

pp. 343-349 ◽

Cited By ~ 1

Author(s):

David L. Wertz ◽

Leo W. Collins ◽

Franz Froelicher

Keyword(s):

Energy Source ◽

Fly Ash ◽

Chemical Species ◽

Primary Energy ◽

Toxic Chemical ◽

Atom Pair ◽

Crystalline Phases ◽

X Ray ◽

X Ray Scattering ◽

Lignite Fly Ash

AbstractThe use of coal, as either a primary energy source or as a source of feedstock chemicals, has been complicated by the noxious and toxic chemical species formed in its gaseous effluents and also by the huge quantities of ash vhich result from its processing. Both the noxious gases and the ash have been the subjects of Federal legislations.X-ray powder patterns (XRPP), composed of atom-pair and self x~ray scattering and the diffraction produced by crystalline phases, have long been used to investigate coals and particularly their combustion ashes (1-3). Over twenty different crystalline phases have recently been reported to exist in certain lignite fly ash (3). Analysis of the crystalline phases has typically been emphasized in previous papers involving coals and ashes, but the amorphous scattering has been given little treatment.

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Microstructure and Chemical Variation in Class F Fly Ash Glass

MRS Proceedings ◽

10.1557/proc-114-307 ◽

1987 ◽

Vol 114 ◽

Cited By ~ 1

Author(s):

J. C. Qian ◽

E. E. Lachowski ◽

F. P. Glasser

Keyword(s):

Phase Separation ◽

Fly Ash ◽

Combustion Process ◽

Glassy Matrix ◽

Nanometer Scale ◽

Chemical Variation ◽

Transmission Electron ◽

Class F Fly Ash ◽

Micrometer Scale ◽

Class F

ABSTRACTFly ash consists of mixtures of crystalline substances in a glassy matrix. This matrix is itself inhomogeneous. The combustion process gives rise to compositional fluctuations typically on a micrometer scale; these fluctuations are preserved in the glass and are gradational. However, high-resolution transmission electron microscopy of Class F ash also reveals the existence of interfaces on a nanometer scale. These arise as a consequence of phase separation. Textures and interfaces typical of spinodal decomposition and possibility also suggestive of classical immiscibility have been observed. It is believed that the occurrence of phase separation resulting in nanometer-scale inhomogeneities will be a feature common to most Class F glasses. The consequences of this complex microstructure to reactivity are not as yet known, but some speculations are presented.

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