Progress on the photocatalytic reduction of hexavalent Cr (VI) using engineered graphitic carbon nitride

Hasija, Vasudha; Raizada, Pankaj; Singh, Pardeep; Verma, Narinder; Khan, Aftab Aslam Parwaz; Singh, Arachana; Rangabhashiyam, S.; Kim, Soo Young; Hussain, Chaudhery Mustansar; Nguyen, Van‐Huy; Le, Quyet Van

doi:10.1016/j.psep.2021.06.042

Cited by 71 publications

(16 citation statements)

References 113 publications

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“…Until today, a myriad of inorganic and organic photocatalytic materials have been explored for the photoreduction of hexavalent chromium. These can be grouped mainly into metal oxide semiconductors [ 48 , 49 , 50 , 51 , 52 ], chalcogenides [ 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 ], and carbon and nitride-based materials [ 70 , 71 , 72 , 73 , 74 , 75 ].…”

Section: Introductionmentioning

confidence: 99%

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

et al. 2022

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Hexavalent chromium (Cr(VI)) is a highly mobile cancerogenic and teratogenic heavy metal ion. Among the varied technologies applied today to address chromium water pollution, photocatalysis offers a rapid reduction of Cr(VI) to the less toxic Cr(III). In contrast to classic photocatalysts, Metal-Organic frameworks (MOFs) are porous semiconductors that can couple the Cr(VI) to Cr(III) photoreduction to the chromium species immobilization. In this minireview, we wish to discuss and analyze the state-of-the-art of MOFs for Cr(VI) detoxification and contextualizing it to the most recent advances and strategies of MOFs for photocatalysis purposes. The minireview has been structured in three sections: (i) a detailed discussion of the specific experimental techniques employed to characterize MOF photocatalysts, (ii) a description and identification of the key characteristics of MOFs for Cr(VI) photoreduction, and (iii) an outlook and perspective section in order to identify future trends.

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Section: Introductionmentioning

confidence: 99%

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

et al. 2022

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“…Hence, detoxifying the hazardous wastes before being released into the environment is continuing to be a serious challenge and many researchers are investigating different methods. Such methods include adsorption [6], membrane filtration [7], photocatalytic degradation [8,9], ion exchange [10], coagulation [7], and oxidation/reduction [11].…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole–polyaniline-water hyacinth leaf protein concentrate composite for the removal of Cr(VI) from aqueous solution: kinetics, isotherm and thermodynamic studies

Yifru¹,

Mekonnen²,

Mehretie³

et al. 2022

Bull. Chem. Soc. Eth.

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ABSTRACT. This work focused on the extraction of “water hyacinth leaf protein concentrate” (WHLPC) and preparation of polypyrrole (PPy), polyaniline (PANI) and polypyrrole-polyaniline copolymer (PPy/PANI) coated WHLPC by in situ polymerization and investigate their application for the removal of Cr(VI) from aqueous solution. After optimizing the experimental conditions like pH, adsorbent dosage, contact time and initial concentration it was found that the kinetics and isotherm data were well fitted to the pseudo-second-order and Langmuir models, respectively. PPy/PANI/WHLPC was found to be an efficient material compared to the other polymer-coated adsorbents with maximum adsorption capacity of 230 mg/g. The presence of counter ions ((NO3-, Cl-, HPO42-, SO42+ and HCO3- ions) slightly decreases the Cr(VI) removal efficiency PPy/PANI/WHLPC. The thermodynamic study reveals that the adsorption of Cr(VI) onto PPY/PANI/WHLPC is endothermic, thermodynamically feasible, and spontaneous. In addition, reusability of the material indicated high removal efficiency for two adsorption cycles. KEY WORDS: Polypyrrole, Polyaniline, Protein concentrate, Water hyacinth, Chromium Bull. Chem. Soc. Ethiop. 2022, 36(3), 571-584. DOI: https://dx.doi.org/10.4314/bcse.v36i3.7

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“…Drinking of chromium‐polluted water causes cerebral pain, anorexia, and other mental disorders 1. The effluents from process industries like pressure‐treated lumber, leather‐processing units, pigments, electroplating, inhibition of water corrosion, textile dyes industries, ceramic glazes plants, and steelworks manufacturing are contaminated with chromium 2–5. In an aqueous environment, chromium usually exists in the form of tri‐ (Cr 3+ ) and hexa‐ (Cr 6+ ) oxidation states.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cr(VI) Using a Hybrid Evolutionary Differential and Multivariable Quadratic Technique

2022

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Chromium is released by process industries and natural activities into water bodies. The compounds are highly toxic and possess harmful effects on human beings and aquatic life. A low‐cost agricultural biomass waste (sugarcane bagasse)‐derived sorbent was utilized for enhanced Cr(VI) removal from aqueous solutions, applying hybrid differential evolutionary optimization for isotherm/kinetic models and a multivariable quadratic technique for sorption process optimization. To improve the sorption efficacy, a novel inverse modeling approach was employed to evaluate the isotherm and kinetic model parameters. The model predictions from the multivariable quadratic model were well validated with the experimental values.

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Progress on the photocatalytic reduction of hexavalent Cr (VI) using engineered graphitic carbon nitride

Cited by 71 publications

References 113 publications

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

A State-of-the-Art of Metal-Organic Frameworks for Chromium Photoreduction vs. Photocatalytic Water Remediation

Polypyrrole–polyaniline-water hyacinth leaf protein concentrate composite for the removal of Cr(VI) from aqueous solution: kinetics, isotherm and thermodynamic studies

Adsorption of Cr(VI) Using a Hybrid Evolutionary Differential and Multivariable Quadratic Technique

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