scholarly journals Characterization of metal concentration, heavy metal elution, and desalination behavior of municipal solid waste incineration bottom and grate sifting deposition ash based on particle size

2020 ◽  
Author(s):  
Shigenori Iino ◽  
Sukehisa Tatsuichi ◽  
Kentaro Miyawaki
Keyword(s):  
Heavy Metal ◽  
Particle Size ◽  
Metal Concentration ◽  
Construction Material ◽  
Bottom Ash ◽  
Total Content ◽  
Waste Incineration ◽  
Particle Sizes ◽  
Removal Ratio ◽  
Metal Elution

AbstractResource and environmental safety protocols of incineration residues were evaluated by analyzing the metal concentration, heavy metal elution, desalination behavior, and chlorine removal ratio owing to particle size differences between bottom ash (BA) and grate sifting deposition ash (GA). In the total content test, Cl, Zn, and Cr in the incinerator BA exceeded the cement acceptance standard (Cl: 1000 mg/kg; Zn: 1700 mg/kg, and Cr: 170 mg/kg) at almost all of the particle sizes, while Au, Ag, Pd, and Zn had high contents in the GA. When using BA as a construction material, heavy metal elution values and contents are restricted as per the product quality standards based on the Japanese soil pollution control law. Lead within the BA and GA exceeded the standard values for most particle sizes. We predicted that there would be a limit on the elution of K by only washing with water. The removal ratio of total chlorine by particle size was approximately 20–70%, where the effect of the particle size on the removal ratio was small, suggesting that the elution of chlorine was complete in approximately 6 hours. These results contribute to information on the recycling of BA and GA.

Determination and Distribution of Heavy Metals in the Municipal Waste Incinerator Slags from Guangdong Province

2011 ◽  
Vol 55-57 ◽  
pp. 229-232
Author(s):  
Jin Yong Liu ◽  
Shui Yu Sun ◽  
Rong Xue Zhang ◽  
Sheng Zhong
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Particle Size ◽  
Small Particle ◽  
Guangdong Province ◽  
Waste Incineration ◽  
Quality Standards ◽  
Waste Incinerator ◽  
Particle Sizes ◽  
Municipal Waste Incinerator

The content of heavy metals (Cu, Cr, Cd, Pb, Zn and Ni) was determined by Atomic absorption spectrophotometer (AAS) and their distributions were analyzed in various waste incineration slags. The results showed that the particle size less than 5mm were a major component in the slag, which were about 59.42% in all the incineration slags. The content of heavy metals was different in the incineration slags. The content of heavy metals Zn, Cr and Cu were significantly higher than that of other heavy metals and that of Pb was in second, followed by Ni, and that of Cd was in the least. The contents of these heavy metals were higher than that of the soil environmental quality standards (GB15618-1995) and the background values in soil of Guangdong. The distribution of heavy metals in different particles of the slag were very different, in which the content of Cr, Zn, Cd and Ni were higher in the small particle sizes, but that of Cu and Pb was not obvious in various particles. In all, the content and distribution of heavy metals were mainly with composition of the waste and the heavy metal characteristics.

Use of Municipal Solid Waste Incineration Bottom Ash in Adsorption of Heavy Metals

2011 ◽  
Vol 474-476 ◽  
pp. 1099-1102
Author(s):  
Hai Ying Zhang ◽  
Yi Zheng ◽  
Hong Tao Hu ◽  
Jing Yu Qi
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Residence Time ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Synthetic Wastewater ◽  
High Porosity ◽  
Municipal Solid Waste Incineration

Bottom ash from municipal solid waste incineration (MSWI) has been previously suggested as an adsorbent for removing heavy metals from wastewater due to its high porosity and large surface area. In this study the adsorption characteristics of heavy metals were investigated using various particle sizes of MSWI bottom ash. The adsorption experiment was conducted using synthetic wastewater containing Cu, Zn, Pb and Cd as a function of residence time, initial pH, ash dosage and particle size, respectively. The adsorption rate increased with decreasing particle size and with increasing residence time. Through the above analysis, this work proved that bottom ash was effective in adsorbing the four heavy metals.

scholarly journals Heavy Metal Contamination of Soils around a Hospital Waste Incinerator Bottom Ash Dumps Site

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
M. Adama ◽  
R. Esena ◽  
B. Fosu-Mensah ◽  
D. Yirenya-Tawiah
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Waste Incinerator ◽  
Hospital Waste ◽  
Dump Site ◽  
High Concentrations ◽  
Health Care Waste

Waste incineration is the main waste management strategy used in treating hospital waste in many developing countries. However, the release of dioxins, POPs, and heavy metals in fly and bottom ash poses environmental and public health concerns. To determine heavy metal (Hg, Pb, Cd, Cr, and Ag) in levels in incinerator bottom ash and soils 100 m around the incinerator bottom ash dump site, ash samples and surrounding soil samples were collected at 20 m, 40 m, 60 m, 80 m, 100 m, and 1,200 m from incinerator. These were analyzed using the absorption spectrophotometer method. The geoaccumulation (Igeo) and pollution load indices (PLI) were used to assess the level of heavy metal contamination of surrounding soils. The study revealed high concentrations in mg/kg for, Zn (16417.69), Pb (143.80), Cr (99.30), and Cd (7.54) in bottom ash and these were above allowable limits for disposal in landfill. The study also found soils within 60 m radius of the incinerator to be polluted with the metals. It is recommended that health care waste managers be educated on the implication of improper management of incinerator bottom ash and regulators monitor hospital waste incinerator sites.

scholarly journals Analysis of the breakthrough phenomena during heavy metal elution from a column packed with municipal waste incineration ash

2018 ◽  
Vol 44 (3) ◽  
Author(s):  
Wenqing Zhang ◽  
Yuesuo Yang ◽  
Hideki Suganuma ◽  
Shigeru Kato ◽  
Seiichi Suzuki ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Waste Incineration ◽  
Municipal Waste ◽  
Metal Elution ◽  
Municipal Waste Incineration

scholarly journals A Novel Dry Treatment for Municipal Solid Waste Incineration Bottom Ash for the Reduction of Salts and Potential Toxic Elements

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3133
Author(s):  
Marco Abis ◽  
Martina Bruno ◽  
Franz-Georg Simon ◽  
Raul Grönholm ◽  
Michel Hoppe ◽  
...  
Keyword(s):  
Particle Size ◽  
Toxic Elements ◽  
Fine Particles ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Pilot Scale ◽  
Minor Components ◽  
Municipal Solid Waste Incineration ◽  
Potential Toxic Elements ◽  
Main Obstacle

The main obstacle to bottom ash (BA) being used as a recycling aggregate is the content of salts and potential toxic elements (PTEs), concentrated in a layer that coats BA particles. This work presents a dry treatment for the removal of salts and PTEs from BA particles. Two pilot-scale abrasion units (with/without the removal of the fine particles) were fed with different BA samples. The performance of the abrasion tests was assessed through the analyses of particle size and moisture, and that of the column leaching tests at solid-to-liquid ratios between 0.3 and 4. The results were: the particle-size distribution of the treated materials was homogeneous (25 wt % had dimensions <6.3 mm) and their moisture halved, as well as the electrical conductivity of the leachates. A significant decrease was observed in the leachates of the treated BA for sulphates (44%), chlorides (26%), and PTEs (53% Cr, 60% Cu and 8% Mo). The statistical analysis revealed good correlations between chloride and sulphate concentrations in the leachates with Ba, Cu, Mo, and Sr, illustrating the consistent behavior of the major and minor components of the layer surrounding BA particles. In conclusion, the tested process could be considered as promising for the improvement of BA valorization.

scholarly journals Grain-Size Specific Characterisation and Resource Potentials of Municipal Solid Waste Incineration (MSWI) Bottom Ash: A German Case Study

Resources ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 66 ◽  
Author(s):  
Iveta Vateva ◽  
David Laner
Keyword(s):  
Mineral Resource ◽  
Grain Size ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Construction Material ◽  
Bottom Ash ◽  
Waste Incineration ◽  
Municipal Solid Waste Incineration ◽  
Limit Values ◽  
Mswi Bottom Ash

Municipal solid waste incineration (MSWI) is a major element of modern waste management and produces annually around 5.7 million tonnes of bottom ash (BA) in Germany. In order to save natural resources and protect the environment, utilisable materials need to be recovered from BA. It was the aim of the present study to determine metal and mineral resource potentials of MSWI BA based on a characterisation study of raw and aged BA of the MSWI plant in Kassel (Germany). The BA investigated consisted of 82.2% mineral materials, 16.3% metals, and 1.5% unburnt organic matter. Overall, 12.1% and 3.6% of the MSWI BA were theoretically recoverable as native ferrous (Fe) and non-ferrous (NFe) metals, respectively. Assuming state-of-the-art recovery technology, 10.7% and 2.0% of the BA were actually extractable as Fe and NFe metals. The processed BA, as a mixture, did not comply with current German limit values for use as a construction material mainly due to excessive soluble salt contents. Coarser grain size fractions were less contaminated, resulting in a utilisable potential of less than 30% of the BA as a construction material. Hence, grain-size specific processing routes need to be developed for MSWI BA to fully exploit its mineral resource potential.

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