Determination of the dissolution rate of hazardous jarosites in different conditions using the shrinking core kinetic model

Islas, Hernán; Flores, Mizraím U.; Reyes, Iván A.; Juárez, Julio C.; Reyes, Martín; Teja, Aislinn M.; Palacios, Elia G.; Thangarasu, Pandiyan; Aguilar-Carrillo, Javier

doi:10.1016/j.jhazmat.2019.121664

Cited by 37 publications

(16 citation statements)

References 48 publications

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“…It is a family of iron-hydroxysulphate minerals which are formed along with other compounds during wastewater treatment and acted as scavenger of iron ions and other toxic elements. These compounds are formed in acidic media, iron sulfate-rich environment, high temperature and pressure, and long reaction time [43]. Thus, X ray diffractogram does not show specific peaks of the jarosite, our operating conditions are far from those allowing its formation.…”

Section: Sem and Eds Analysismentioning

confidence: 84%

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

Afanga

Zazou

Titchou

et al. 2020

Sustain Environ Res

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Textile wastewater containing toxic dyes needs efficient treatment before being released into the environment. Certain dyes are known or presumed to have carcinogenic potential for humans. In this work, hybrid electrochemical processes including electrocoagulation (EC) alone and combined with electro Fenton (EF), anodic oxidation (AO) and peroxicoagulation (PC) were tested to treat real textile wastewater using a batch reactor. A sequential EC and EF (EC-EF) process was found to be more effective. The experimental results indicated that the effectiveness of the treatment decreases in the following order: EC-EF > EC-AO > EC-PC > EC. EC-EF results showed a decrease in chemical oxygen demand (COD, 97%), total organic carbon (98%), total suspended solids (98%), and the concentration of metal species; showing that the treatment of such wastewater type can be achieved by combined EC-EF process in a one-pot bench-scale reactor. The electrical energy consumption, the iron dissolution, and the biological oxygen demand/COD ratios of EC and EC-EF processes were evaluated. Characterization of the sludge generated during EC treatment at current density of 20 mA cm − 2 was carried out. Precipitation, adsorption, and electrochemical oxidation/reduction of organic dyes and metallic ions occurred during the treatment. This investigation shows the efficiency of combined EC-EF to treat textile wastewater.

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Section: Sem and Eds Analysismentioning

confidence: 84%

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

Afanga

Zazou

Titchou

et al. 2020

Sustain Environ Res

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show abstract

“…There are three cases based on the controlling step of dissolution, which are expressed by the equations below: (i) controlled by the diffusion of H + , (ii) controlled by the chemical reaction at the surface, and (iii) controlled by the diffusion through the product layer. 52–54 X = k 1 t ,1 − (1 − X ) 1/3 = k 2 t ,1 + 2(1 − X ) − 3(1 − X ) 2/3 = k 3 t ,The dissolution rate constant of the H + ion diffusion, the surface chemical reaction and the product layer diffusion are represented by k 1 , k 2 and k 3 , respectively. From Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Dynamic Behaviormentioning

confidence: 99%

The chemical stability of ZIF-8 in aldehyde under air conditions

et al. 2023

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“…Islas et al. [20] studied the reaction kinetics of the dissolution process of jarosite and proposed a kinetic equation with the SUCK model, which described adequately the dissolution process and provided theoretical guidance for predicting the dissolution efficiency of jarosite under different reaction conditions. Wang et al.…”

Section: Introductionmentioning

confidence: 99%

“…The optimized reaction conditions provided high guidance for significantly improving gold extraction efficiency. Islas et al [20] studied the reaction kinetics of the dissolution process of jarosite and proposed a kinetic equation with the SUCK model, which described adequately the dissolution process and provided theoretical guidance for predicting the dissolution efficiency of jarosite under different reaction conditions. Wang et al [21] studied the kinetics of sodium removal from the alumina-extracted residue with help of the SUCK model, and explored the reaction process and mechanism of sodium removal, which provided theoretical guidance for efficient sodium removal.…”

Section: Introductionmentioning

confidence: 99%

Reaction Kinetics Model of Surface‐Denitrated Spherical Gun Propellant

Liu

Ding

et al. 2022

Propellants Explo Pyrotec

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Gun propellant with progressive burning performance plays an important role in improving the comprehensive performance of barrel weapon. At present, surfacedenitrated gun propellant prepared by removing energetic functional groups (À ONO 2 ) directionally in the surface layer of gun propellant, is an original progressive burning gun propellant. In this study, the reaction kinetics of denitration process of spherical gun propellant was established by a simple weighing method based on the shrinking unreacted core kinetic model (SUCK model) of solid-liquid reaction. The SEM was used to obtain the change of the cross-sectional microstructure of spherical gun propellant before and after the denitration reaction, confirming the core-shell structure of surface-denitrated spherical gun propellant.Then, the denitration reaction rate of spherical gun propellant was studied under different denitration reaction temperatures and reaction times. Meanwhile, the Arrhenius formula was used to calculate the activation energy of the denitration reaction. The results showed that the denitration reaction of spherical gun propellant was controlled by the diffusion of denitration solution in the solid product layer and the value of the apparent activation energy (E a ) is 105.7 kJ • mol À 1 . This work not only establishes the kinetic model of surface-denitrated spherical gun propellant but also provides a theoretical and practical basis for the controllable and efficient preparation of surface-denitrated gun propellant.

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Determination of the dissolution rate of hazardous jarosites in different conditions using the shrinking core kinetic model

Cited by 37 publications

References 48 publications

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

Integrated electrochemical processes for textile industry wastewater treatment: system performances and sludge settling characteristics

The chemical stability of ZIF-8 in aldehyde under air conditions

Reaction Kinetics Model of Surface‐Denitrated Spherical Gun Propellant

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