Heavy Metals Leaching of MSWI Bottom Ash: Effect of Short-term Natural Weathering

2017 ◽  
Author(s):  
Jurgita Seniunaitė ◽  
Saulius Vasarevičius
Keyword(s):  
Heavy Metals ◽  
Bottom Ash ◽  
Atmospheric Precipitation ◽  
Soil Surface ◽  
Natural Weathering ◽  
Short Term ◽  
Municipal Solid Wastes ◽  
Mswi Bottom Ash ◽  
Spectral Analysis Method ◽  
By Products

Municipal solid wastes incineration (MSWI) is an important part of the waste management systems in many European countries. Incineration process generates two main by-products: fly ash (FA) and bottom ash (BA). Bottom ash is composed of a variety of oxides, heavy metals and salts. Landfilling of untreated (fresh) BA can cause soil, surface and ground water contamination problems, because atmospheric precipitation in BA formed leachate, which contains of various materials. In this study investigates the influence of natural weathering to heavy metals leaching from BA. Leaching tests of bottom ash were carried out in 6 months, leachate samples were taken at 12 times (every 2 weeks). Heavy metals (Pb, Cu) concentrations were determined by atomic adsorption of spectral analysis method. The research shown, that the highest lead and copper concentration was determinated in 2 weeks weathered bottom ash leachate, respectively was 0.613 mg l–1 and 0.068 mg l–1. In both cases the concentration of Pb (0.010–0.052 mg l–1) and Cu (0.010-0.018 mg l–1) became almost stable after 12 weeks. Can be concluded, that short-term (3 months) natural weathering is sufficient time for stabilise MSWI bottom ash and heavy metals (Cu and Pb) leaching. After 18–24 weeks heavy metals concentrations stabilized and remained almost constant.

Short-term natural weathering of MSWI bottom ash as a function of particle size

2003 ◽  
Vol 23 (10) ◽  
pp. 887-895 ◽  
Author(s):  
J.M Chimenos ◽  
A.I Fernández ◽  
L Miralles ◽  
M Segarra ◽  
F Espiell
Keyword(s):  
Particle Size ◽  
Bottom Ash ◽  
Natural Weathering ◽  
Short Term ◽  
Mswi Bottom Ash

Short-term natural weathering of MSWI bottom ash

2000 ◽  
Vol 79 (3) ◽  
pp. 287-299 ◽  
Author(s):  
J.M Chimenos ◽  
A.I Fernández ◽  
R Nadal ◽  
F Espiell
Keyword(s):  
Bottom Ash ◽  
Natural Weathering ◽  
Short Term ◽  
Mswi Bottom Ash

scholarly journals Valorization of MSWI Bottom Ash as a Function of Particle Size Distribution, Using Steam Washing

2020 ◽  
Vol 12 (22) ◽  
pp. 9461
Author(s):  
Enrico Destefanis ◽  
Caterina Caviglia ◽  
Davide Bernasconi ◽  
Erica Bicchi ◽  
Renato Boero ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Bottom Ash ◽  
Raw Material ◽  
Size Classes ◽  
Mswi Bottom Ash ◽  
Legal Limits ◽  
Chloride Sulfate ◽  
Particle Size Classes ◽  
By Products

Treatments to reduce the leaching of contaminants (chloride, sulfate, heavy metals) into the environment from bottom ash (BA) are investigated, as a function of the ash’s particle size (s). The aim is to make BA suitable for reuse as secondary raw material, in accordance with the legal requirements. Such treatments must be economically feasible and, possibly, have to use by-products of the plant (in this case, steam in excess from the turbine). For the sake of completeness and comparison, carbonation is performed on those BA particle size classes that are not positively responsive to steam washing. BA is partitioned into four different particle size classes (s ≥ 4.75, 4.75 > s ≥ 2, 2 > s ≥ 1 and s < 1 mm, corresponding to 36, 24, 13 and 27 wt%, respectively). In the case of s ≥ 2 mm (60 wt%), steam washing is effective in reducing to under the legal limits the leaching of chlorides, sulfate and heavy metals (Zn, Cu, Cd, Pb). It has been observed that steam washing causes both removal and dissolution of thin dust adherent to the BA’s surface. BA with 2 > s ≥ 1 (~13 wt% of total BA) requires a combination of steam washing and carbonation to achieve a leaching below the legal limits. The finest BA fraction, s < 1 mm (~27 wt% of total BA), is treated by carbonation, which reduces heavy metals leaching by 85%, but it fails to sufficiently curb chlorides and sulfates.

Change of Mechanical Properties during Short-Term Natural Weathering of MSWI Bottom Ash

2005 ◽  
Vol 39 (19) ◽  
pp. 7725-7730 ◽  
Author(s):  
J. M. Chimenos ◽  
A. I. Fernández ◽  
L. Miralles ◽  
J. R. Rosell ◽  
A. Navarro Ezquerra
Keyword(s):  
Mechanical Properties ◽  
Bottom Ash ◽  
Natural Weathering ◽  
Short Term ◽  
Mswi Bottom Ash

Effect on Compressive Strength by Mixing Ratio of MSWI Melting Slag/Bottom Ash

2009 ◽  
Vol 620-622 ◽  
pp. 631-634
Author(s):  
Woo Keun Lee ◽  
Eun Zoo Park ◽  
Ji Hyeon Lee ◽  
Yeong Seok Yoo
Keyword(s):  
Crystal Structure ◽  
Heavy Metals ◽  
Compressive Strength ◽  
Bottom Ash ◽  
Environmental Safety ◽  
Resource Conservation ◽  
Leaching Test ◽  
Mixing Ratio ◽  
Mswi Bottom Ash ◽  
Melting Slag

In this work, inorganic paste was made from melting slag (MS) of MSWI ash and MSWI bottom ash (MBA) by geopolymer technique. Heavy metals such as Pb and Cu are highly contained in MBA. In the view of environmental protection and resource conservation, recycling of MSWI ash is desirable. MS and MBA were mixed to make inorganic paste. Compressive strength was measured to evaluate the characteristics of inorganic paste after the period of 1, 3 and 7day. Compressive strength of almost 90 MPa was obtained at the mixing ratio of MS : MBA = 9 : 1. And the crystalloid and crystal structure was analyzed by FTIR and XRD. Korea Standard leaching Test (KSLT) is also used to evaluate the environmental safety of inorganic paste. The leached concentration of Pb and Cu were 0.44 ppm and 0.15 ppm, respectively. According to this result, heavy metals were safety immobilized and stabilized.

Effect of short-term natural weathering on MSWI and wood waste bottom ash leaching behaviour

2011 ◽  
Vol 189 (1-2) ◽  
pp. 435-443 ◽  
Author(s):  
M. Gori ◽  
B. Bergfeldt ◽  
G. Pfrang-Stotz ◽  
J. Reichelt ◽  
P. Sirini
Keyword(s):  
Bottom Ash ◽  
Wood Waste ◽  
Natural Weathering ◽  
Short Term ◽  
Leaching Behaviour ◽  
Ash Leaching

Impacts of natural weathering on the transformation/neoformation processes in landfilled MSWI bottom ash: A geoenvironmental perspective

2011 ◽  
Vol 31 (12) ◽  
pp. 2440-2454 ◽  
Author(s):  
Amirhomayoun Saffarzadeh ◽  
Takayuki Shimaoka ◽  
Yunmei Wei ◽  
Kevin H. Gardner ◽  
Craig N. Musselman
Keyword(s):  
Bottom Ash ◽  
Natural Weathering ◽  
Mswi Bottom Ash

Effects of Metakoalin on Municipal Solid Waste Incineration (MSWI) Bottom Ash-Cement Composite

2020 ◽  
Vol 1010 ◽  
pp. 653-658
Author(s):  
Roshazita Che Amat ◽  
Khairul Nizar Ismail ◽  
Khairel Rafezi Ahmad ◽  
Norlia Mohamad Ibrahim
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Blended Cement ◽  
Waste Incineration ◽  
Cement Composite ◽  
Municipal Solid Waste Incineration ◽  
Mswi Bottom Ash ◽  
Waste Incinerators ◽  
By Products

Municipal solid waste incinerators (MSWI) produce by products which can be classified as bottom and fly ashes. The bottom ash accounts for 85-90 % of solid product resulting from MSW combustion. The objective of this study was to assess the feasibility of application of municipal solid waste incineration (MSWI) bottom ash as a supplementary cementations material for the preparation of blended cement. The used of bottom ash as a research material is caused by substances contained in cement is almost the same with bottom ash. Bottom ash was found to have some reactivity, but without greatly affecting the hydration process of OPC at 10 % replacement with 10% metakaolin is required to be used in the production of concrete in order to improve strength.

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