Leaching behavior of indium from waste liquid crystal display: Further study on the coupling effect of multi-factors for optimum leaching process

Qin, Jianchun; Fujita, Toyohisa; Xu, Jianing; Wei, Yuezhou; Dodbiba, Gjergj; Zhou, Yali; Li, Zengyuan

doi:10.1016/j.jece.2022.107930

Cited by 10 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is evident that as the concentration of ammonium citrate rises, so does the rate at which zinc leaches. More precisely, when the concentration of ammonium citrate increases from 1 mol/L to 5 mol/L, the level of zinc extraction increases from 45.86% to 82.51%. In addition, the concentration of ammonium citrate is the most important factor affecting the dissolution of smithsonite.…”

Section: Impact Of the Particle Size On Smithsonite Leachingmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the Leaching Kinetics of Zinc from Smithsonite in Ammonium Citrate Solution

Chen,

Wu,

Wang

2024

Metals

View full text Add to dashboard Cite

In this study, the response surface method is used to develop a model for analyzing and optimizing zinc leaching experiments. An investigation into the leaching kinetics of smithsonite in ammonium citrate solution is also conducted. A model of kinetics is studied in order to represent these effects. The experimental data show that an increase in the solution temperature, concentration, and stirring speed has a positive impact on the leaching rate, while an increase in the particle size has a negative impact on it. The optimal experimental conditions consist of a leaching temperature of 70 °C, ammonium citrate concentration of 5 mol/L, particle size of 38 µm, and rotational speed of 1000 rpm. Under these optimal conditions, the leaching rate of zinc from smithsonite is 83.51%. It is speculated that the kinetic model will change when the temperature is higher than 60 °C. When the temperature is lower than 60 °C, the leaching process is under the control of the shrinking core model of the surface chemical reactions. The calculated activation energy of the leaching reaction is equal to 42 kJ/mol. The model of the leaching process can be described by the following equation: 1−1−x1/3=k0⋅(C)0.6181⋅r0−0.5868⋅SS0.6901exp⁡−42/RT]t. This demonstrates that an ammonium citrate solution can be used in the leaching process of zinc in smithsonite as an effective and clean leaching agent.

show abstract

Section: Impact Of the Particle Size On Smithsonite Leachingmentioning

confidence: 99%

“…The composite number of elements in the BBD test group was relatively lower and more cost effective compared to the central composite design. Moreover, it requires fewer consecutive trials [44][45][46][47].…”

Section: Optimal Experimental Designmentioning

confidence: 99%