Comparison of the photocatalytic, adsorption and electrochemical methods for the removal of cationic dyes from aqueous solutions

Anantha, M.S.; Olivera, Sharon; Hu, Chunyan; Jayanna, B.K.; Reddy, Narendra; Venkatesh, Krishna; Muralidhara, H.B.; Naidu, Ravi

doi:10.1016/j.eti.2020.100612

Cited by 68 publications

(31 citation statements)

References 37 publications

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“…This factor was calculated as 0.09 for HW, 0.10 for HNa and 0.11 for HK, which were between 0 and 1. Thus, MB dye adsorption on adsorbents was found to be favourable [43][44]. The best-fitted isotherm model was Temkin isotherm with R 2 of 0.9220, 0.9413 and 0.9300 for HW, HNa and HK, respectively.…”

Section: Adsorption Isothermsmentioning

confidence: 92%

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Ülgüdür¹,

ELİBOL²,

Malkoç³

2021

Journal of Innovative Science and Engineering (JISE)

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Adsorption has traditionally been evaluated as an economical and easily applicable process for treating certain wastewaters, such as ones including dyes and heavy metals. Even though adsorbent materials specifically produced for the purpose of wastewater treatment commercially exist, the production cost may create an economic burden on wastewater treatment processes. Agricultural wastes can be valorized as adsorbents in adsorption processes. The adsorption capacity of these wastes can be improved via pre-treatment methods such as chemical application and microwave irradiation. This study investigated the potential applicability of hazelnut husk as an adsorbent for methylene blue (MB) dye. To this purpose, the husk was activated by sequential chemical or water and microwave applications.Structural analysis on the produced adsorbent was performed by Fourier transform infrared spectrophotometry (FTIR) and field emission scanning electron microscopy (FE-SEM).Isotherm (Langmuir, Freundlich, Temkin and Harkins-Jura isotherms) and kinetic (pseudofirst-order, pseudo-second-order, Elovich and intraparticle diffusion kinetic models) behaviours of adsorption were also evaluated. The results indicated that MB could be removed by 92-94% considering all adsorbents produced. Further isotherm and kinetic studies revealed that MB adsorption was both physically and chemically induced, and the reaction followed the pseudo-second-order kinetic model (R 2 >0.99).

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Section: Adsorption Isothermsmentioning

confidence: 92%

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Ülgüdür¹,

ELİBOL²,

Malkoç³

2021

Journal of Innovative Science and Engineering (JISE)

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“…Various methods are performed to address pollutants, including ion exchange, flotation, media filtration, centrifugation, and adsorption approaches. However, there are limitations due to high operating costs, low efficiency, poor recyclability, and toxic by-products 3,4 .…”

Section: Introductionmentioning

confidence: 99%

“…Photocatalysis has been studied and considered a green and effective approach in addressing environmental pollution 4 . Photocatalysis has attracted for its versatility in the environment and energy sector.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Key Optical and Electrical Characteristics in Reporting Photocatalysis of Semiconductors

Bui

Pham

Tran

et al. 2021

Preprint

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Photocatalysis has been studied and considered as a green and effective approach in addressing environmental pollution. However, factors that affect photocatalytic performance have not been systematically studied. In this work, we have presented a comprehensive roadmap for characterizing, interpreting, and reporting semiconductors' electrical and optical properties through routinely used techniques (XPS, DRS, PL) in the context of photocatalysis. Having deeply and precisely studied the band structure of three representative photocatalysts, we have presented and highlighted essential information and details, which are critical and beneficial for studies of (1) band alignments, (2) redox potentials, and (3) defects. Further works with a comprehensive understanding of band structure are desirable and hold great promise.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Photocatalysis has been studied and considered a green and effective approach in addressing environmental pollution [5][6][7] . Photocatalysis has attracted for its versatility in the environment and energy sector.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the Key Optical and Electrical Characteristics in Reporting Photocatalysis of Semiconductors

Bui

Pham

Tran

et al. 2021

Preprint

View full text Add to dashboard Cite

Photocatalysis has been studied and considered as a green and effective approach in addressing environmental pollution. However, factors that affect photocatalytic performance have not been systematically studied. In this work, we have presented a comprehensive roadmap for characterizing, interpreting, and reporting semiconductors' electrical and optical properties through routinely used techniques such as diffuse reflectance spectroscopy (DRS), electrochemical techniques (Mott-Schottky plots), photoluminescence (PL), X-ray photoelectron spectroscopy (XPS ), and ultraviolet photoelectron spectroscopy (UPS) in the context of photocatalysis. Having deeply and precisely studied the band structure of three representative photocatalysts, we have presented and highlighted essential information and details, which are critical and beneficial for studies of (1) band alignments, (2) redox potentials, and (3) defects. Further works with a comprehensive understanding of band structure are desirable and hold great promise.

show abstract

Comparison of the photocatalytic, adsorption and electrochemical methods for the removal of cationic dyes from aqueous solutions

Cited by 68 publications

References 37 publications

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Revisiting the Key Optical and Electrical Characteristics in Reporting Photocatalysis of Semiconductors

Revisiting the Key Optical and Electrical Characteristics in Reporting Photocatalysis of Semiconductors

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