Bioregeneration of spent activated carbon: Review of key factors and recent mathematical models of kinetics

Leong, Kwok-Yii; Loo, Siew-Leng; Bashir, Mohammed J.K.; Oh, Wen−Da; Rao, Pasupuleti Visweswara; Lim, Jun-Wei

doi:10.1016/j.cjche.2017.09.018

Cited by 18 publications

(7 citation statements)

References 79 publications

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“…Although it is a viable alternative in wastewater treatment, adsorption presents in practice a concern problem related to the use of adsorbent agents since, after a specific period of time, the AC loses its adsorptive capacity, due to the high concentration of pollutants retained on its surface [ 24 , 37 , 38 , 39 , 40 ]. Saturated adsorbent materials are, in some cases, disposed in landfills without proper treatment, leading to the possibility of toxic contaminants infiltrating the environment, consequently causing secondary environmental problems.…”

Section: Adsorbent Regeneration Via Aopsmentioning

confidence: 99%

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Santos

Xiao

Chaukura

et al. 2022

Heliyon

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Section: Adsorbent Regeneration Via Aopsmentioning

confidence: 99%

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Santos

Xiao

Chaukura

et al. 2022

Heliyon

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“…Intraparticle diffusion into micropores is prominent here as microorganisms secrete enzymes (exoenzymes). By this, biodegradation processes eventually occur over time, and fractions of pollutants in contact with the carbon get degraded [ 138 ]. The merits of this approach come with its low cost and ready availability as microorganisms abound in soil or wastewater.…”

Section: Reusability and Regenerationmentioning

confidence: 99%

Remediation with Semicoke-Preparation, Characterization, and Adsorption Application

Lartey-Young

2020

Materials

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Development of low-cost contaminant sorbents from industrial waste is now an essential aspect of the circular economy since their disposal continues to threaten ecological integrity. Semicoke (SC), a by-product generated in large quantities and described as solid waste from gasification of low-rank coal (LRC), is gaining popularity in line with its reuse capacity in the energy industry but is less explored as a contaminant adsorbent despite its physical and elemental carbon properties. This paper summarizes recent information on SC, sources and production, adsorption mechanism of polluting contaminants, and summarizes regeneration methods capable of yielding sustainability for the material reuse.

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“…Activated carbon has been widely used as a pollutant sorbent in many industries for several decades [43,44]. It has been shown that both granular and dusty activated carbon can be used to adsorb pesticides as well as to remove various harmful compounds from wastewater, e.g., phenol, for landfill wastewater treatment [45,46].…”

Section: Introductionmentioning

confidence: 99%

Technical and Economic Aspects of Environmentally Sustainable Investment in Terms of the EU Taxonomy

Ciuła,

Generowicz,

Oleksy-Gębczyk

et al. 2024

Energies

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Removing impurities that occur in landfill gas, from sulphur and silicon compounds, is crucial for the energetic use of biogas in a cogeneration unit for energy purposes. The aim of this study was to analyse the shaped activated carbon, examining its structure and elemental composition as part of the biogas purification. The qualitative study of the purified landfill gas performed in this study showed a significant overshoot of hydrogen sulphide at 304.1 ppm with respect to the gas engine manufacturer’s requirements, while the calculated hydrogen sulphide reduction efficiency was 24.58%. Examination of the surface of the spent carbon and its pores with a scanning microscope revealed a high level of clotting by sulphur compounds, which prevents proper reduction of this compound and reduces the efficiency of the treatment plant. Replacement of the activated carbon bed with a new one showed a hydrogen sulphide value of 7.5 ppm in the purified gas and a calculated reduction efficiency of 97.9%. The results of the study confirmed that continuous monitoring of the quality of the purified gas is necessary to control the adsorption properties of the activated carbon and can be used for the operation of gas engines in cogeneration units. The landfill gas treatment method described in this paper constitutes an environmentally sustainable project within the meaning of the EU regulation on the establishment of a framework to promote and facilitate this type of investment in terms of its financing and operation. The topic of the work fits into three key areas of broad research and implementation activities. The first, technological, is the transition to a low-carbon, sustainable and resource-efficient closed-loop economy; the second, environmental, pollution prevention and control. The third area is economics and finance in terms of making financial products available designed to reduce climate change and reporting on these activities.

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Bioregeneration of spent activated carbon: Review of key factors and recent mathematical models of kinetics

Cited by 18 publications

References 79 publications

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Regeneration of dye-saturated activated carbon through advanced oxidative processes: A review

Remediation with Semicoke-Preparation, Characterization, and Adsorption Application

Technical and Economic Aspects of Environmentally Sustainable Investment in Terms of the EU Taxonomy

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