Evaluation of Coal Fly Ash-Based Synthetic Aggregates as a Soil Ameliorant for the Low Productive Acidic Red Soil

Jayasinghe, G.Y.; Tokashiki, Yoshihiro; Kitou, Makoto

doi:10.1007/s11270-009-0023-y

Cited by 16 publications

(7 citation statements)

References 49 publications

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“…The pH was determined by potentiometry FE20 (METTLER-TOLEDO CO., Ltd, ZURICH, CH) [28]. Briefly summarized here are the following: step 1 (acid soluble state) -the WC was determined by drying method [29].…”

Section: Chemical Analysismentioning

confidence: 99%

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Synthesis of Novel Core-Shell Magnetic Fe3O4@C Nanoparticles with Carboxyl Function for Use as an Immobilisation Agent to Remediate Lead-Contaminated Soils

Ma¹,

Liu²,

Wei³

et al. 2020

Pol. J. Environ. Stud.

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In this study, a carbon shell was coated on Fe 3 O 4 nanoparticles using a hydrothermal method followed by modification of carboxyl end groups on the Fe 3 O 4 @C to form Fe 3 O 4 @C-COOH for creating an immobilisation agent for remediating lead-contaminated soils. The surface of an Fe 3 O 4 @C nanoparticle was successfully covered with carboxyl end groups. The Fe 3 O 4 core possessed the superparamagnetism property; the carbon shell protected the core from being oxidised or dissolved in acid solution, and provided good modifiability. Due to the strong interaction between lead and carboxyl end groups, this synthesised remediation agent exhibited high adsorption capacity. The Fe 3 O 4 @C-COOH nanoparticles principally promoted the transformation of lead (Pb) from a reducible to residual state, while having no obvious effect on the oxidation state of the lead. The amount of Fe 3 O 4 @C-COOH and the composition of soil organic matter had a higher influence on Pb distribution than soil pH, water content, or conductivity. Under optimal immobilisation conditions, the fractionation of the Pb acid-soluble, reducible, oxidative, and residual states in the contaminated soil changed significantly. The leaching and migration of Pb were significantly reduced, thus achieving remediation of lead-contaminated soils by immobilisation. Thus, remediation of lead-contaminated soils via Fe 3 O 4 @C-COOH immobilisation is a potentially practical and technologically feasible method.

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Section: Chemical Analysismentioning

confidence: 99%

“…Briefly summarized here are the following: step 1 (acid soluble state) -the WC was determined by drying method [29]. The EC was determined by the 5:1 extraction method [28]. OM was determined by the potassium dichromate-concentrated sulfuric acid external heating method [30].…”

Section: Chemical Analysismentioning

confidence: 99%

Synthesis of Novel Core-Shell Magnetic Fe3O4@C Nanoparticles with Carboxyl Function for Use as an Immobilisation Agent to Remediate Lead-Contaminated Soils

Ma¹,

Liu²,

Wei³

et al. 2020

Pol. J. Environ. Stud.

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show abstract

“…The C:N Ratio is widely used as an indicator of the maturity and stability of organic matter [18,19]. According to Sri Lankan standards the carbon to nitrogen ratio of the final compost should be in the range of 10 to 25.…”

Section: Moisture Content Variationmentioning

confidence: 99%

Co-digestion of Poultry Sludge Filter Pressed Cake with Market Waste to Enhance the Compost Quality

2016

IJAAEE

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Abstract-Huge quantities of market waste (MW) materials are generated yearly in Sri Lanka as organic waste and, in present, composting is regarded as one of the sustainable technique in waste management. The removal of solid waste is the last operation of solid waste management. Currently, the wastewater treatment plant of "Nelna" farm in Gampaha, Sri Lanka has been generating almost one tonne of poultry sludge filter pressed cake (PSFC) per day as a waste from the poultry industry. While the unsystematic disposal of PSFC may cause not only air pollution and bad odor but also nutrient pollution of ground waters and inland water bodies, compost research studies were conducted as one of the environmentally acceptable methods for recycling several types of sludge. Co-digestion was studied in order to discover the optimum mixing ratio of PSFC and MW for improved quality compost production. Four different types of treatments were prepared with three replicates by mixing PSFC and MW at the rates of; (T1) 0% PSFC + 100% MW, (T2) 25% PSFC + 75% MW, (T3) 50% PSFC + 50% MW and (T4) 75% PSFC + 25% MW respectively. Physical and chemical characteristics of developed composts were analyzed after 10 weeks.Treatment (T2) with 25% PSFC +75% MW reported the optimum physical and chemical properties with reference to standard compost. Bulk density, true density, moisture content, mean weight diameter and coarseness index of the treatment with 25% PSFC +75% MW were 0.41 gcm -3 , 1.42 gcm -3 24.35%, 0.054 mm and 32.2%, respectively. Furthermore, electrical conductivity, pH, organic carbon, nitrogen, phosphorous, potassium and C: N ratio of the above treatment (25% PSFC +75% MW) were 5.61 dS/m, 7.5, 24.17 %, 2.45%, 0.54%, 1.8%, and 9.8, respectively.

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“…For an example particle sizes for a potting medium are different from particle sizes required as a soil ameliorant. As (Jayasinghe et al, 2009b), B: acid soil aggregates with starch binder (Jayasinghe et al, 2008), C: acid soil coal fly ash aggregates with starch binder, (Jayasinghe et al, 2008), D: acid soil compost aggregates with inorganic binder, E: coal fly ash aggregates with inorganic binder (Jayasinghe et al, 2009a), F: sewage sludge aggregates with inorganic binder. ) in Okinawa Japan.…”

Section: Physical Propertiesmentioning

confidence: 99%

Synthetic Aggregates Produced by Different Wastes as a Soil Ameliorant, a Potting Media Component and a Waste Management Option.

Jayasinghe¹,

Tokashiki²

2010

Waste Management

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Evaluation of Coal Fly Ash-Based Synthetic Aggregates as a Soil Ameliorant for the Low Productive Acidic Red Soil

Abstract: A potential new way of producing coal fly ash-based granular synthetic aggregates (

Cited by 16 publications

References 49 publications

Synthesis of Novel Core-Shell Magnetic Fe<sub>3</sub>O<sub>4</sub>@C Nanoparticles with Carboxyl Function for Use as an Immobilisation Agent to Remediate Lead-Contaminated Soils

Synthesis of Novel Core-Shell Magnetic Fe<sub>3</sub>O<sub>4</sub>@C Nanoparticles with Carboxyl Function for Use as an Immobilisation Agent to Remediate Lead-Contaminated Soils

Co-digestion of Poultry Sludge Filter Pressed Cake with Market Waste to Enhance the Compost Quality

Synthetic Aggregates Produced by Different Wastes as a Soil Ameliorant, a Potting Media Component and a Waste Management Option.

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