Evaluation of the leaching behavior of incineration bottom ash using seawater: A comparison with standard leaching tests

2017 ◽  
Vol 62 ◽  
pp. 139-146 ◽  
Author(s):  
Wenlin Yvonne Lin ◽  
Kim Soon Heng ◽  
Minh Quan Nguyen ◽  
Jin Rui Ivan Ho ◽  
Omar Ahmad Bin Mohamed Noh ◽  
...  
Keyword(s):  
Bottom Ash ◽  
Leaching Tests ◽  
Leaching Behavior

scholarly journals Influence of red mud and waste glass on the microstructure, strength, and leaching behavior of bottom ash-based geopolymer composites

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Constantin Bobirică ◽  
Cristina Orbeci ◽  
Liliana Bobirică ◽  
Petru Palade ◽  
Călin Deleanu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Red Mud ◽  
Spectroscopic Analysis ◽  
Bottom Ash ◽  
Waste Glass ◽  
Leaching Tests ◽  
Leaching Behavior ◽  
Constant Amount ◽  
Alternative Source ◽  
Geopolymer Composites

AbstractThe influence of waste glass and red mud addition as alternative source of aluminosilicate precursors on the microstructural, mechanical, and leaching properties of bottom ash-based geopolymer was studied in this work through mineralogical, morphological, and spectroscopic analysis, as well as by conducting compressive strength and leaching tests. The bottom ash-based geopolymer composites were synthesized by adding a constant amount of waste glass (10% by weight) and increasing amounts of red mud (up to 30% by weight). The results derived from FTIR, 29Si and 27Al MAS NMR, and SEM–EDX revealed that adding up to 10% (by weight) red mud to the synthesis mixes leads to an increase in the degree of geopolymerization of the activated mixes. The compressive strength followed the same trend. An increase of more than 10% (by weight) red mud added to the synthesis mixes results in a significant decrease of compressive strength of the geopolymer composites. A low leachability of geopolymer composites in regard with their contaminants was revealed especially for those with good compressive strength.

Characterization of lead-bearing phases in municipal waste combustor fly ash

1996 ◽  
Vol 54 ◽  
pp. 516-517
Author(s):  
L. L. Sutter ◽  
G. R. Dewey ◽  
J. F. Sandell
Keyword(s):  
Fly Ash ◽  
Bottom Ash ◽  
Municipal Waste ◽  
Primary Concern ◽  
Leaching Behavior ◽  
Waste Combustion ◽  
Lead And Cadmium ◽  
Lead Speciation ◽  
Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

scholarly journals Assessing the leaching behavior of different gunshot materials in natural spring waters

2019 ◽  
Vol 31 (1) ◽  
Author(s):  
Julian Fäth ◽  
Axel Göttlein
Keyword(s):  
Environmental Risks ◽  
Aquatic Systems ◽  
Toxicity Tests ◽  
Toxicity Screening ◽  
Leaching Tests ◽  
Leaching Behavior ◽  
Thin Coatings ◽  
Toxicological Effects ◽  
Potential Risks ◽  
Natural Spring

Abstract Background Owing to the high environmental risk of lead-based gunshot, especially as the main source of acute lead poisoning in waterfowl, restrictions on its use in European wetlands are being put into place. In order to assess potential risks of alternative gunshot pellets to aquatic systems, we validated a recently published study that compared the leaching behavior of different game shot materials in an artificial solution and their toxicological effects to Daphnia magna. We therefore investigated the altered leaching of shot materials in natural spring waters. Results The different water conditions (geology/redox conditions) had a strong influence on the leaching behavior of the examined shot types. Spring water originating from siliceous bedrock showed the highest concentrations of nearly all leached metals under aerobic conditions. The results were similar to the former study, which used an artificial standardized medium for daphnids. Conclusions According to the conducted leaching tests, Cu- and Zn-based as well as Zn-coated gunshot should be avoided by reason of the high risks they pose to the aquatic environment. Furthermore, the use of Pb-based and Ni-alloyed or -coated game shot also should be hampered owing to their impact on birds or other wildlife. Since some of these shot materials are still on the European market, an effective toxicity screening of alternative gunshot materials is necessary. By conducting standardized leaching tests, in addition to chemical compositional standards and toxicity tests regarding birds, the environmental risks of each game shot would entirely be assessed. The method presented in this study provides a further step for initial ecotoxicological risk assessment of gunshot for aquatic systems, since it additionally assesses minor components, like thin coatings, which also can have a high impact to these ecosystems.

An analytical electron microscopy investigation of municipal solid waste incineration bottom ash

1998 ◽  
Vol 13 (1) ◽  
pp. 28-36 ◽  
Author(s):  
James E. Krzanowski ◽  
T. Taylor Eighmy ◽  
Bradley S. Crannell ◽  
J. Dykstra Eusden
Keyword(s):  
Electron Microscopy ◽  
Metal Oxides ◽  
Amorphous Material ◽  
Analytical Electron Microscopy ◽  
Bottom Ash ◽  
Waste Incineration ◽  
High Density ◽  
Leaching Behavior ◽  
Microscopy Investigation ◽  
Analytical Electron

Incinerator bottom ash samples have been characterized using analytical electron microscopy (AEM) techniques, including electron diffraction, energy dispersive spectroscopy, and electron energy loss spectroscopy. The samples were first separated by magnetic properties and density. Three resulting fractions were examined: the magnetic, high-density (MHD) fraction, the nonmagnetic/high-density (NMHD) fraction, and the nonmagnetic, low-density (NMLD) fraction. Examination of these samples revealed a variety of submicron microstructural features. For the MHD fraction, metal oxides, iron silicates, aluminum silicates, and calcium phosphate compounds were found in addition to amorphous material. The NMHD fraction contained elements similar to the MHD fraction but had more amorphous material; crystalline silicates were less common. Compounds such as MgO and chloroapatite were also found. The NMLD fraction contained SiO2 and numerous metal oxides. The results of some of these analyses were used to model leaching behavior of the ash. Based on the AEM results, three mineral phases were chosen as candidates for aqueous geochemical thermodynamic equilibrium modeling of pH-dependent leaching: chromite, chloroapatite, and zincite. In two of these three cases (chromite, chloroapatite), the selected mineral phase provided excellent agreement with the experimentally observed leaching behavior. AEM was shown to be a useful tool for elucidating mineralogy of complex environmental samples.

Long Term Leaching Behavior of Antimony from MSWI Bottom Ash: Influence of Mineral Additives and of Organic Acids

2016 ◽  
Vol 8 (7) ◽  
pp. 2545-2552 ◽  
Author(s):  
Bram Verbinnen ◽  
Jo Van Caneghem ◽  
Pieter Billen ◽  
Carlo Vandecasteele
Keyword(s):  
Organic Acids ◽  
Bottom Ash ◽  
Leaching Behavior ◽  
Mswi Bottom Ash ◽  
Mineral Additives
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