scholarly journals Biofunctional Characteristics of Lignite Fly Ash Modified by Humates: A New Soil Conditioner

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Konstantinos Chassapis ◽  
Maria Roulia ◽  
Evangelia Vrettou ◽  
Despina Fili ◽  
Monica Zervaki
Keyword(s):  
Fly Ash ◽  
Humic Substances ◽  
Isotherm Models ◽  
Soil Conditions ◽  
Lignite Fly Ash ◽  
Host Materials ◽  
Agricultural Applications ◽  
High Sorption ◽  
Microbial Cultivation ◽  
Shed Light

Fly ash superficially modified with humic substances from the Megalopolis lignitic power plant was prepared and evaluated for agricultural uses. UV-vis spectrophotometry and IR spectroscopy revealed that fly ash shows high sorption efficiency towards humic substances. Adsorption proceeds stepwise via strong Coulombic and hydrophophic forces of attraction between guest and host materials. Langmuir, Freundlich, BET, Harkins-Jura, and Dubinin-Radushkevich isotherm models were employed to evaluate the ongoing adsorption and shed light to the physicochemical properties of the sorbent-adsorbate system. Humic substances desorption and microbial cultivation experiments were also carried out to examine the regeneration of the humates under washing and explore the possibility of this material acclimatizing in real soil conditions, both useful for biofunctional agricultural applications.

scholarly journals Fly Ash Coated with Magnetic Materials: Improved Adsorbent for Cu (II) Removal from Wastewater

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 63
Author(s):  
Maria Harja ◽  
Gabriela Buema ◽  
Nicoleta Lupu ◽  
Horia Chiriac ◽  
Dumitru Daniel Herea ◽  
...  
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Copper Ions ◽  
Synthetic Wastewater ◽  
Bet Surface Area ◽  
Isotherm Models ◽  
Batch Adsorption ◽  
Maximum Adsorption Capacity ◽  
Copper Adsorption ◽  
X Ray

Fly ash/magnetite material was used for the adsorption of copper ions from synthetic wastewater. The obtained material was characterized by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area, and vibrating sample magnetometer (VSM). Batch adsorption experiments were employed in order to investigate the effects of adsorbent dose, initial Cu (II) concentration and contact time over adsorption efficiency. The experimental isotherms were modeled using Langmuir (four types of its linearization), Freundlich, Temkin, and Harkins–Jura isotherm models. The fits of the results are estimated according to the Langmuir isotherm, with a maximum adsorption capacity of 17.39 mg/g. The pseudo-second-order model was able to describe kinetic results. The data obtained throughout the study prove that this novel material represents a potential low-cost adsorbent for copper adsorption with improved adsorption capacity and magnetic separation capability compared with raw fly ash.

scholarly journals Effect of Lignite Fly Ash on the Growth and Reproduction of Earthworm Eisenia fetida

2009 ◽  
Vol 6 (2) ◽  
pp. 511-517 ◽  
Author(s):  
S. Sarojini ◽  
S. Ananthakrishnasamy ◽  
G. Manimegala ◽  
M. Prakash ◽  
G. Gunasekaran
Keyword(s):  
Fly Ash ◽  
Eisenia Fetida ◽  
Power Plants ◽  
Thermal Power ◽  
Biological Properties ◽  
Cow Dung ◽  
Physical Chemical ◽  
Lignite Fly Ash ◽  
Agricultural Use ◽  
Growth And Reproduction

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.

Evaluation of Synthetic Aggregate from Lignite Fly Ash

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

scholarly journals Transformation of non-water sorbing fly ash to a water sorbing material for drought management

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Abhisekh Saha ◽  
Sreedeep Sekharan ◽  
Uttam Manna ◽  
Lingaraj Sahoo
Keyword(s):  
Fly Ash ◽  
Plant Growth ◽  
Fine Sand ◽  
High Water ◽  
Drought Management ◽  
Soil Water Retention ◽  
Drought Period ◽  
Superabsorbent Hydrogel ◽  
Industrial Solid Waste ◽  
Agricultural Applications

Abstract Securing water in the soil through suitable amendments is one of the methods for drought management in arid regions. In this study, a poor water sorbing fly ash was transformed into a high water-absorbing material for improving soil water retention during the drought period. The fly ash water absorbent (FAWA) exhibited high water-absorbing capacity (WAC) of 310 g/g at par with commercially available superabsorbent hydrogel (SAH). The FAWA showed excellent re-swelling behavior for more than eight alternate wetting–drying cycles. The WAC of FAWA was sensitive to salt type, pH, and ionic strength of the solution. At maximum salinity level permitted for plant growth, the WAC of FAWA was 80 g/g indicating its suitability for drought management. There was only a marginal WAC variation in the range of pH (5.5–7.5) considered most suitable for plant growth. The drying characteristics of FAWA amended soil exhibited an increase in desaturation time by 3.3, 2.2, and 1.5 times for fine sand, silt loam, and clay loam, respectively. The study demonstrates the success of using a low rate of FAWA for drought management with the advantage of offering a non-toxic and eco-friendly solution to mass utilization of industrial solid waste for agricultural applications.

Measuring Graphitic Carbon and Crystalline Minerals in Coals and Bottom Ashes

1987 ◽  
Vol 31 ◽  
pp. 343-349 ◽  
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.

Pedological properties and ecological implications of substrates derived 3 and 11 years after the revegetation of lignite fly ash disposal sites in Serbia

CATENA ◽  
2018 ◽  
Vol 163 ◽  
pp. 78-88 ◽  
Author(s):  
Olga Kostić ◽  
Snežana Jarić ◽  
Gordana Gajić ◽  
Dragana Pavlović ◽  
Marija Pavlović ◽  
...  
Keyword(s):  
Fly Ash ◽  
Lignite Fly Ash ◽  
Ecological Implications ◽  
Ash Disposal

Cr(VI) Leached from Lignite Fly Ash—Assessment of Groundwater Contamination Risk

2020 ◽  
Vol 231 (7) ◽  
Author(s):  
C. Tsioptsias ◽  
G. Samiotis ◽  
L. Lefteri ◽  
E. Amanatidou
Keyword(s):  
Fly Ash ◽  
Groundwater Contamination ◽  
Contamination Risk ◽  
Lignite Fly Ash

Use of lignite fly ash as an additive in alkaline stabilisation and pasteurisation of wastewater sludge

2003 ◽  
Vol 21 (5) ◽  
pp. 448-458 ◽  
Author(s):  
Fatma Olcay Kocaer ◽  
Ufuk Alkan ◽  
Hüseyin Savas Baskaya
Keyword(s):  
Fly Ash ◽  
Wastewater Sludge ◽  
Lignite Fly Ash
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