Potential Removal of Chromium (Vi) Ions by Macadamia Nutshell From Steel Industry Wastewater

Tinega, Joseph Nyamoko; Omosa, Isaiah Bosire; Letema, Sammy

doi:10.30638/eemj.2023.032

Cited by 2 publications

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“…Data on the impact or influence of contact time and initial concentration can be applied to determine parameters in kinetic and isotherm models, respectively (Nur-E-Alam et al, 2018). The factors influencing metal adsorption by biomass-based adsorbents are summarised and presented below in Table 3 (Tinega et al, 2023).…”

Section: Factors Influencing Cr (Vi) Adsorption and Experiments Designmentioning

confidence: 99%

Chromium (VI) adsorption from steel industry wastewater using biomass and agro-based adsorbents: A Review

Joseph,

Isaiah,

Sammy

2023

jagst

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In recent years, increased steel production has resulted in an increased release of Cr (VI) effluent from electroplating processes. The current conventional technologies for Cr (VI) removal, for instance, chemical precipitation, ion exchange, membranes, and electrochemical technologies, have proven to be expensive and not eco-friendly. Adsorption using biomass or agro-based adsorbents has been demonstrated to be an eco-friendly method. In this study, the potential of several biomass and agro-based adsorbents for Cr (VI) removal from steel industry wastewater has been reviewed. The application of adsorption parameters, isotherms, and kinetic models has also been reviewed. The study review reveals that the maximum adsorption of Cr (VI) ions from wastewater was dependent on the pH, temperature, contact time, type of adsorbent material, and initial metal concentration. The literature review demonstrated that maximum Cr (VI) adsorption efficiency ranged from 90–100%, with optimum pH, contact time, and temperature ranging from 2–5, 30-180 min, and 25–30 °C, respectively. The equilibrium adsorption data was best described by the Langmuir and Freundlich isotherms and the pseudo-second-order kinetic model. The thermodynamic studies revealed that the adsorption process was spontaneous and endothermic. It has been found that biomass and agro-based adsorbents are potentially eco-friendly alternatives for Cr (VI) removal from industrial wastewater. However, several gaps have been identified to improve the Cr (VI) removal efficiency, spent adsorbent reuse and safe disposal, optimisation, and commercial application of agro-based adsorbents.

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Section: Factors Influencing Cr (Vi) Adsorption and Experiments Designmentioning

confidence: 99%

Chromium (VI) adsorption from steel industry wastewater using biomass and agro-based adsorbents: A Review

Joseph,

Isaiah,

Sammy

2023

jagst

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Mathematical Modeling of Microbial Bioremediation

Rosca,

Cozma,

Gavrilescu

2024

Biosorption Processes for Heavy Metal Removal

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Biosorption is a method that holds great promise for environmental bioremediation. However, the process mechanism is not yet fully comprehended as it relies heavily on the characteristics of the biosorbent, properties of the pollutants, and operational conditions. The knowledge and understanding of sorption kinetics and mechanisms are critical for the design and scaling up of biosorption. Applying the proper models and methods in the evaluation of heavy metals biosorption can elucidate mechanisms, analyze experimental data, predict outcomes, and optimize processes. After a brief analysis of the literature in the field of biosorption, it has been found that the most valuable models provide information about process kinetics, maximum biosorption capacity and thermodynamics. Additionally, the preferred methods for studying the interactive effects of process variables and creating a precise mathematical model that describes the process accurately are highly sought after. Thus, the main purpose of the chapter consists in exposing the available mathematical models and methods that can be applied for the evaluation of all factors that could affect the biosorption of heavy metals. The isotherms, kinetic and thermodynamic models, as well as the statistical tools suitable for evaluating biosorption were presented, with a special emphasis on their application, advantages, as well as disadvantages.

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Potential Removal of Chromium (Vi) Ions by Macadamia Nutshell From Steel Industry Wastewater

Cited by 2 publications

References 0 publications

Chromium (VI) adsorption from steel industry wastewater using biomass and agro-based adsorbents: A Review

Chromium (VI) adsorption from steel industry wastewater using biomass and agro-based adsorbents: A Review

Mathematical Modeling of Microbial Bioremediation

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