Electroplating sludge metal recovering with vitrification using mineral powder additive

Chou, I-Cheng; Kuo, Yi‐Ming; Lin, Chitsan; Wang, Jianwen; Wang, Chih-Ta; Chang-Chien, Guo-Ping

doi:10.1016/j.resconrec.2011.10.006

Cited by 40 publications

(6 citation statements)

References 12 publications

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“…Similarly, electroplating sludges usually come from electroplating plants and consist of a large quantity of heavy metals [180,181]. While metals like chromium and nickel among others can be obtained from this waste using vitrification [180], in-flight treatment of the waste with a DC plasma torch has also been used to obtain these same metals [182].…”

Section: Recovery Of Metalsmentioning

confidence: 99%

Applications of Plasma Technologies in Recycling Processes

Kusano,

Kusano

2024

Materials

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Plasmas are reactive ionised gases, which enable the creation of unique reaction fields. This allows plasmas to be widely used for a variety of chemical processes for materials, recycling among others. Because of the increase in urgency to find more sustainable methods of waste management, plasmas have been enthusiastically applied to recycling processes. This review presents recent developments of plasma technologies for recycling linked to economical models of circular economy and waste management hierarchies, exemplifying the thermal decomposition of organic components or substances, the recovery of inorganic materials like metals, the treatment of paper, wind turbine waste, and electronic waste. It is discovered that thermal plasmas are most applicable to thermal processes, whereas nonthermal plasmas are often applied in different contexts which utilise their chemical selectivity. Most applications of plasmas in recycling are successful, but there is room for advancements in applications. Additionally, further perspectives are discussed.

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Section: Recovery Of Metalsmentioning

confidence: 99%

Applications of Plasma Technologies in Recycling Processes

Kusano,

Kusano

2024

Materials

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“…Vitrification has been a worldwide recognized solution for treating hazardous waste for decades. 1 By transforming waste substances into durable glass or glass-ceramics materials, the vitrification process is able to stabilize a wide range of dangerous waste, namely, fly ashes, [2][3][4][5][6] bottom ashes, 7 sludges, [8][9][10] asbestos, [11][12][13] medical waste, [14][15][16] metallurgical slags [17][18][19][20] or nuclear waste. [21][22][23][24][25][26][27][28][29][30][31] Thus, vitrification of waste is an attractive approach due to its flexibility to treat various type of hazardous waste.…”

Section: Introductionmentioning

confidence: 99%

Crystallization and rheology of Na₂O–CaO–Al₂O₃–SiO₂ melt in the vitrification of technological waste

Perret,

Sierk,

Pereira Machado

et al. 2024

Int J of Appl Glass Sci

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Vitrification of solid technological waste is currently under investigation. For this type of waste made up of metals, minerals, and organic matters, formulation studies were carried out in the NCAS (Na2O–CaO–Al2O3–SiO2) system in order to define a vitrifying additive to treat the entire waste deposit, while maximizing the waste loading. Main challenge related to this type of waste comes from the presence of alumina in very large quantities in the glass/glass–ceramics melt, enhancing the risk of melt solidification due to a fast and massive crystallization. Melt lock‐up can potentially occur at the operating temperature envisaged for the process (1400°C) and is prohibitive because it would lead to a premature stoppage of the process. The results obtained from casting tests, rheological experiments, and thermodynamic modeling enabled to provide an accurate estimation of the risk of melt lock‐up for NCAS compositions. It was highlighted that the composition had a major influence on the temperature at which massive crystallization might occur. From all the results obtained, the maximum Al2O3 content that could be incorporated in the final material was determined to be close to 50 wt%. The composition of a vitrifying additive was also statistically designed to treat the technological waste of interest.

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“…Electroplating industries generate the increasing amount of contaminated water, which requires treatment before being discharged to mitigate the impact on the environment [1]. However, as a product from the process of the of wastewater treatment, a great deal of highly hazardous sludge is produced [2].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation

Zhang

Shi

Chen

et al. 2018

Advances in Civil Engineering

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The electroplating sludge may pose serious threat to human health and surrounding environment without safe treatment. This paper investigated the feasibility of using electroplating sludge as subgrade backfill materials, by evaluating the mechanical properties and environmental risk of the cement-coal fly ash solidified sludge. In this study, Portland cement and coal fly ash are used to solidify/stabilize the sludge. After curing for 7, 14, and 28 days, the stabilization/solidification sludge specimens were subject to a series of mechanical, leaching, and microcosmic tests. It was found that the compressive strength increased with the increase of cement content, curing time, and the cement replacement by coal fly ash besides water content. Among these factors, the impact of water content on the compressive strength is most noticeable. It was observed that the compressive strength declined by 87.1% when the water content increased from 0% to 10%. Besides, leaching tests showed that the amount of leaching heavy metals were under the standard limit. These results demonstrated utilization of electroplating sludge in subgrade backfill material may provide an alternative for the treatment of electroplating sludge.

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Electroplating sludge metal recovering with vitrification using mineral powder additive

Cited by 40 publications

References 12 publications

Applications of Plasma Technologies in Recycling Processes

Applications of Plasma Technologies in Recycling Processes

Crystallization and rheology of Na₂O–CaO–Al₂O₃–SiO₂ melt in the vitrification of technological waste

Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation

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Electroplating sludge metal recovering with vitrification using mineral powder additive

Cited by 40 publications

References 12 publications

Applications of Plasma Technologies in Recycling Processes

Applications of Plasma Technologies in Recycling Processes

Crystallization and rheology of Na2O–CaO–Al2O3–SiO2 melt in the vitrification of technological waste

Utilization of Electroplating Sludge as Subgrade Backfill Materials: Mechanical and Environmental Risk Evaluation

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Crystallization and rheology of Na₂O–CaO–Al₂O₃–SiO₂ melt in the vitrification of technological waste