The effects of salinity and temperature on phase transformation of copper-laden sludge

Hsieh, Ching Hong; Shih, Kaimin; Hu, Ching Yao; Lo, Shang Lien; Li, Nien Hsun; Cheng, Yi-Ting

doi:10.1016/j.jhazmat.2012.10.066

Cited by 10 publications

(3 citation statements)

References 24 publications

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“…Desalination process was carried out by washing the solid with deionized water before sintering for six times. The mixture was centrifuged at 500 rpm for 10 min and filtered (Hsieh et al, 2013;Wei et al, 2014). The desalinated simulated sludge was dried at 105°C for 24 h and ground to pass through a 74 lm sieve.…”

Section: Materials Preparationmentioning

confidence: 99%

The role of temperature on Cr(VI) formation and reduction during heating of chromium-containing sludge in the presence of CaO

et al. 2015

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Section: Materials Preparationmentioning

confidence: 99%

The role of temperature on Cr(VI) formation and reduction during heating of chromium-containing sludge in the presence of CaO

et al. 2015

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“…Nickel-containing sludge (NCS) is a type of nocuous solid waste including Ni, Cd, Fe, Cu, Ca, and other main components that formed by chemical precipitation of nickel-containing wastewater produced during nickel plating [1,2]. If not handled properly, secondary pollution will occur, which will have a huge impact on the ecological environment and human health.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Permittivity and Microwave Pretreatment Characteristics of Nickel-Containing Sludge from Battery Production

Guo

Ping

et al. 2019

Processes

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Permittivity is a vitally important parameter for the description of the absorption and heating characteristics of materials under microwave irradiation. In this paper, the permittivity of nickel-containing sludge (NCS), which is created during battery production as a cheap secondary resource, was measured at temperatures from 20 • C to 600 • C at 2.45 GHz using the cavity perturbation method. In addition, the loss tangent (tanδ) and penetration depth (Dp) of microwaves into the material were calculated. The results of the permittivity study show that the dielectric constant (ε ) and dielectric loss factor (ε") of the NCS increase with increasing temperature. The variations of the loss tangent (tanδ) and penetration depth (Dp) with the temperature can be divided into two parts at 200 • C. The effect of the initial moisture content on the dielectric properties of the material is notably greater than that of the temperature, which was confirmed by the heating curve. After microwave pretreatment, the nickel-containing phase is transformed into NiO, while the weight of NCS is reduced by more than 20%, the particle size is significantly reduced and the leaching time reduce 20 min than that of conventional heating.

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“…Therefore, a large number of electroplating wastewater is produced and is usually treated by chemical precipitation to meet the discharge standards [3,4]. This then creates nickel-containing residue, a cheap secondary resource [5,6].…”

Section: Introductionmentioning

confidence: 99%

Microwave drying of nickel-containing residue: dielectric properties, kinetics, and energy aspects

Guo

et al. 2019

Green Processing and Synthesis

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Nickel-containing residue (NCR) is a hazardous solid waste from battery production lines. Recently, the interest in recovering valuable metals from NCR has increased because sustainable utilization of resources is more and more valued. Drying is a key part of the recovery process. In this study, we measured the dielectric properties of the NCR for different moisture contents and temperatures using the cavity perturbation method at 2.45 GHz. The microwave absorption characteristics of NCR had a positive correlation with the moisture content, while it was less efficient in the 20-180°C temperature range. Then found that the microwave drying data at different microwave powers (400-700 W) and for different sample weights (60-120 g) have a better fit with the Midilli-Kucuk model. The activation energy (Ea) was received as 9.76 W/g using an exponential expression based on the Arrhenius equation. Finally, the energy consumption reduce 110 W·h/kg than that of drying with a single microwave power by optimizing the microwave drying process.

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The effects of salinity and temperature on phase transformation of copper-laden sludge

Cited by 10 publications

References 24 publications

The role of temperature on Cr(VI) formation and reduction during heating of chromium-containing sludge in the presence of CaO

The role of temperature on Cr(VI) formation and reduction during heating of chromium-containing sludge in the presence of CaO

High-Temperature Permittivity and Microwave Pretreatment Characteristics of Nickel-Containing Sludge from Battery Production

Microwave drying of nickel-containing residue: dielectric properties, kinetics, and energy aspects

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