Application of aluminosilicate clay mineral-based composites in photocatalysis

Zou, Yingtong; Hu, Yang; Shen, Zewen; Yao, Lei; Tang, Duoyue; Zhang, Sai; Wang, Shuqin; Hu, Baowei; Zhao, Guixia; Wang, Xiangke

doi:10.1016/j.jes.2021.07.015

Cited by 96 publications

(24 citation statements)

References 162 publications

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“…Over the years, there have beenmore and more soil environmental degradation phenomena such as soil nutrient loss, soil degradation and soil contamination. These phenomena create numerous secondary environmental issues, such as decline of land productivity, water scarcity, food security, and changes in the climate (Yuan et al 2019;Zou et al 2022). Globally, soil contamination is a prevalent issue, and both inorganic and organic pollutants can cause significant environmental issues.…”

Section: Introductionmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

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377

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Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

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377

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“…Therefore, modification and improvement of the bare catalysts are of high interest in water treatment research. In recent years, several studies have demonstrated the applicability of using various clay-based materials as improved photocatalysts that provide efficient and stable reactions [44,[47][48][49][50]. Furthermore, irradiation of UVC light with a combination of a homogeneous catalyst as hydrogen-peroxide and clay-based heterogeneous catalysts may deliver an effective advanced oxidation process, as was recently shown for BPS [51].…”

Section: Introductionmentioning

confidence: 92%

Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Levakov

Shahar

Rytwo

2022

Water

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Carbamazepine (CBZ) is one of the most common emerging contaminants released to the aquatic environment through domestic and pharmaceutical wastewater. Due to its high persistence through conventional degradation treatments, CBZ is considered a typical indicator for anthropogenic activities. This study tested the removal of CBZ through two different clay-based purification techniques: adsorption of relatively large concentrations (20–500 μmol L−1) and photocatalysis of lower concentrations (<20 μmol L−1). The sorption mechanism was examined by FTIR measurements, exchangeable cations released, and colloidal charge of the adsorbing clay materials. Photocatalysis was performed in batch experiments under various conditions. Despite the neutral charge of carbamazepine, the highest adsorption was observed on negatively charged montmorillonite-based clays. Desorption tests indicate that adsorbed CBZ is not released by washing. The adsorption/desorption processes were confirmed by ATR-FTIR analysis of the clay-CBZ particles. A combination of synthetic montmorillonite or hectorite with low H2O2 concentrations under UVC irradiation exhibits efficient homo-heterogeneous photodegradation at μM CBZ levels. The two techniques presented in this study suggest solutions for both industrial and municipal wastewater, possibly enabling water reuse.

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“…Photocatalytic degradation of OPs is one of the most efficient methods to decontaminate the organic pollution, especially at extra low concentrations (Yao et al 2021;Zou et al 2022). Ndoun et al (2021) prepared biochar from guayule bagasse and cotton gin waste, and applied it for the adsorption of pharmaceuticals from solutions.…”

Section: Organic Pollutantsmentioning

confidence: 99%

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Cai

Zhang

et al. 2022

Biochar

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158

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The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e−-h+ pairs, to produce more superoxide radicals (·O2−) and hydroxyl radicals (·OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Graphical Abstract

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Application of aluminosilicate clay mineral-based composites in photocatalysis

Cited by 96 publications

References 162 publications

Biochar for the removal of contaminants from soil and water: a review

Biochar for the removal of contaminants from soil and water: a review

Carbamazepine Removal by Clay-Based Materials Using Adsorption and Photodegradation

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

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