TiO2/Kaolin composite as low-cost adsorbent for procion red removal from aqueous  solution: kinetics, equilibrium, and thermodynamic studies

Taher, Tarmizi; Wulandari, A.; Mohadi, Risfidian; Lesbani, Aldes

doi:10.4314/bcse.v33i3.5

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…Kaolinite, a class of layered silicate mineral with one tetrahedral sheet and one octahedral sheet has various uses as a result of its properties such as natural whiteness, fine particle, nonabrasive, and chemical stability [8]. It has been considered a good effluent removal in wastewaters, especially due to its high porous structure, which accounts for its high adsorptive property [9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of TiO2-activated kaolinite composite for photocatalytic degradation of rhodamine B dye

Azeez¹,

Saheed²,

Adekola³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. Rhodamine B (RhB) is one of the prominent dyes discovered to be carcinogenic and mutagenic substance present in the ecosystem. Alteration of the characteristics of TiO2 through modification with clay influences the behavior of some organic molecules at its surface, and thus its photocatalytic properties. This study investigates the photocatalytic degradation of RhB using TiO2-activated kaolinite composite (TiO2-AKC). TiO2-AKC was prepared in absolute ethanol and characterized using SEM, EDX, TEM, BET and FTIR. The photodegradation of RhB using TiO2-AKC at room temperature under visible-light was studied at various time intervals and the concentration of RhB was monitored using Ultraviolet-Visible spectrophotometer. Characterisation of TiO2-AKC revealed an adequate distribution of TiO2 over the AKC surface, with an enhanced surface area (TiO2-AKC 808 m2g-1, TiO2 50.0 m2g-1, AKC 20.6 m2g-1) necessary for effective degradation. The degradation was efficient in TiO2-AKC than in sole TiO2 resulting in 99.51% and 88.35%, respectively. The experimental data was analysed using zeroth and first order kinetics, parabolic diffusion, and modified Freundlich model. The degradation kinetics conforms to first order kinetics in TiO2-AKC and sole TiO2. The mechanism of the degradation using TiO2-AKC fit into modified Freundlich model and parabolic diffusion model while sole TiO2 was best described by parabolic diffusion model. KEY WORDS: Kaolin, Kinetics, Organic dyes, Photodegradation, Pollutants, Titanium(IV) oxide Bull. Chem. Soc. Ethiop. 2022, 36(1), 13-24. DOI: https://dx.doi.org/10.4314/bcse.v36i1.2

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Section: Introductionmentioning

confidence: 99%

Preparation of TiO2-activated kaolinite composite for photocatalytic degradation of rhodamine B dye

Azeez¹,

Saheed²,

Adekola³

et al. 2022

Bull. Chem. Soc. Eth.

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Sulfur-zinc modified kaolin/steel slag: A particle electrode that efficiently degrades norfloxacin in a neutral/alkaline environment

Song

Wang

et al. 2021

Chemosphere

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Recent Review of Titania-Clay-Based Composites Emerging as Advanced Adsorbents and Photocatalysts for Degradation of Dyes over the Last Decade

Raza

Rehman

Batool

2022

Adsorption Science & Technology

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Textile industry being one of the most flourishing industries keeps growing and developing every year, and the consequences are not very pleasant. Even though its contribution towards economy of a country is indisputable, there are many pros and cons associated with it that should not be brushed aside, one of them being textile dye waste which is also growing at alarming rate. Many techniques have been designed to deal with this environmental crisis including adsorption and photodegradation of dye waste by various substances, both natural and synthetic. TiO2 and clay both have gained immense popularity in this area. Over the last decade, many successful attempts have been made to design TiO2-clay-based composites to combine and make the most of their individual capabilities to degrade textile dye waste. While clay is an effective adsorbent, inexpensive, innocuous, and a great ion exchanger, TiO2 provides supplementary active sites and free radicals and speeds up the degradation rate of dyes. This review summarizes various features of TiO2-clay-based composites including their surface characteristics, their role as dye adsorbents and photocatalysts, challenges in their implementation, and modifications to overcome these challenges made over the last decade.

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TiO2/Kaolin composite as low-cost adsorbent for procion red removal from aqueous solution: kinetics, equilibrium, and thermodynamic studies

Cited by 4 publications

References 33 publications

Preparation of TiO2-activated kaolinite composite for photocatalytic degradation of rhodamine B dye

Preparation of TiO2-activated kaolinite composite for photocatalytic degradation of rhodamine B dye

Sulfur-zinc modified kaolin/steel slag: A particle electrode that efficiently degrades norfloxacin in a neutral/alkaline environment

Recent Review of Titania-Clay-Based Composites Emerging as Advanced Adsorbents and Photocatalysts for Degradation of Dyes over the Last Decade

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