Vitrification as an alternative to landfilling of tannery sewage sludge

Celary, Piotr; Sobik-Szołtysek, Jolanta

doi:10.1016/j.wasman.2014.08.022

Cited by 86 publications

(34 citation statements)

References 25 publications

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“…Electroplating is a basic process in the machine manufacturing industry and uses various heavy metals to protect plating pieces [1][2][3][4]. High volumes of electroplating wastewater are generated, which is an extremely hazardous type of wastewater containing multiple heavy metals [5]. Electroplating wastewater can be categorized into acidic or alkaline wastewater in accordance with the electroplating technology used.…”

Section: Introductionmentioning

confidence: 99%

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Liu

Khan

Wang

et al. 2020

Water

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Electroplating sludge is a hazardous waste produced in plating and metallurgical processes which is commonly disposed of in safety landfills. In this work, electroplating sludge containing 25.6% Fe and 5.5% Co (named S1) and another containing 36.8% Fe and 7.8% Cr (S2) were recycled for the preparation of erdite-bearing particles via a facile hydrothermal route with only the addition of Na2S·9H2O. In the sludges, Fe-containing compounds were weakly crystallized and spontaneously converted to short rod-like erdite particles (SP1) in the presence of Co or long nanorod (SP2) particles with a diameter of 100 nm and length of 0.5–1.5 μm in the presence of Cr. The two products, SP1 and SP2, were applied in electroplating wastewater treatment, in which a small portion of Co in SP1 was released in wastewater, whereas Cr in SP2 was not. Adding 0.3 g/L SP2 resulted in the removal of 99.7% of Zn, 99.4% of Cu, 37.9% of Ni and 53.3% of Co in the electroplating wastewater, with residues at concentrations of 0.007, 0.003, 0.33, 0.09 and 0.002 mg/L, respectively. Thus, the treated electroplating wastewater met the discharge standard for electroplating wastewater in China. These removal efficiencies were higher than those achieved using powdered activated carbon, polyaluminum chloride, polyferric sulfate or pure Na2S·9H2O reagent. With the method, waste electroplating sludge was recycled as nanorod erdite-bearing particles which showed superior efficiency in electroplating wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Liu

Khan

Wang

et al. 2020

Water

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“…Geoengineering studies were carried out on the use of by-product to stabilize soft subsoil of cohesive soils in a 4:1 ratio with cement or hydrated lime [15,16]. Sintered or vitrified SSA can also be used as an aggregate [17,18]. Table 1.…”

Section: Introductionmentioning

confidence: 99%

Sewage Sludge Bottom Ash Characteristics and Potential Application in Road Embankment

Zabielska-Adamska

2019

Sustainability

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The paper focuses on sustainability-related applications in civil engineering by using environmentally friendly, alternative construction materials. The paper presents geotechnical properties of thermally converted, municipal sewage sludge in a grate furnace in an incineration plant. Bottom ash and its mixture with sand have been tested to show that they can be considered as a substitute for natural soil built-in road embankments. The product of sewage sludge combustion and its combination with sand meet all code requirements for material suitable for road embankments. As a result of the 30% reduction of resistance to failure values after waste soaking, which causes relatively low California Bearing Ratio (CBR) values of soaked waste, waste should be built into places isolated from groundwater and precipitation. That is also indicated by the possibility of heavy metals leaching from the waste because such content is much higher than in uncontaminated soils, although leaching does not exceed the limits commonly quoted for natural soil solutions. Tested bottom ash as a product of combustion in a grate furnace is a more preferred material for earthworks than fly ash generated during incineration in a furnace with fluidized bed due to the particle size and heavy metal concentrations.

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“…Vitrification is currently being investigated as a means of dealing with this waste in order to address the upcoming changes in the Polish law which will prohibit it from being landfilled after the year 2016 based on the Act on Waste of 27 [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Heavy Metal Volatilization during Vitrification of Tannery Sewage Sludge with Mineral Waste

Celary

Sobik-Szołtysek

Tajchman

2016

Eng. Prot. Environ.

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Wolatylizacja metali ciężkich podczas witryfikacji garbarskich osadów ściekowych z odpadami mineralnymiThe study investigated the volatilization of heavy metals during vitrification of tannery sludge with mineral waste such as fly ash from brown coal combustion, foundry sands and carbonate flotation waste generated during ore enrichment process from the zinc-lead industry. The experiment focused on 6 metals Cr, Cd, Ni, Pb, Zn, Fe and how different waste additives affected their volatilization. In the study mixtures containing 35% w/w sewage sludge and 65% w/w mineral waste were vitrified. The 65% share consisted of either only fly ash, waste foundry sands or a mix of the previous with carbonate flotation waste at the following ratios 1:1, 1.5:1, 2:1 and 3:1. It was found that vitrification of tannery sewage sludge with certain mineral waste can be accompanied by reasonably low emission levels of chromium (as low as 22.4 ± 1.4%) similar to those during incineration. The lowest chromium emission levels were noted for mixtures of sewage sludge with fly ash and a combination of fly ash and carbonate flotation waste at a ratio of 3:1. Very low nickel (as low as 9.5 ± 6.5%) and iron (lowest being 1.2 ± 0.6%) volatilization were also noted for the above mentioned mixtures although for one type of used sewage sludge the lowest amount of volatilized nickel was noted for the combination with foundry sands alone. However regardless of the used waste high degrees of volatilization were observed for cadmium (≥ 73.4%), lead (≥ 79.1%) and zinc (≥ 87.8%).

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Vitrification as an alternative to landfilling of tannery sewage sludge

Cited by 86 publications

References 25 publications

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Upcycling of Electroplating Sludge to Prepare Erdite-Bearing Nanorods for the Adsorption of Heavy Metals from Electroplating Wastewater Effluent

Sewage Sludge Bottom Ash Characteristics and Potential Application in Road Embankment

Heavy Metal Volatilization during Vitrification of Tannery Sewage Sludge with Mineral Waste

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