Peroxymonosulfate improved photocatalytic degradation of atrazine by activated carbon/graphitic carbon nitride composite under visible light irradiation

Dikdim, Jean Marie Dangwang; Gong, Yan; Noumi, Guy Bertrand; Siéliéchi, Joseph Marie; Zhao, Xu; Ma, Ning; Yang, Min; Tchatchueng, Jean Bosco

doi:10.1016/j.chemosphere.2018.10.177

Cited by 115 publications

(24 citation statements)

References 40 publications

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“…From the pattern of CN, two main diffraction peaks could be found at 13.0° and 26.9°, which correspond to the interlayer stacking (100) plane of tri-s-triazine units and the (002) plane arising from the interlayer stacking of aromatic systems (JCPDS No. 87-1526) [43]. All the diffraction peaks of Cu/Al2O3 and CN could be found in the pattern of Cu/Al2O3/CN composite, indicating the successful synthesis of the Cu/Al2O3/CN composite.…”

Section: Structural Characterization Of Compositesmentioning

confidence: 84%

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

et al. 2020

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The classic Fenton reaction, which is driven by iron species, has been widely explored for pollutant degradation, but is strictly limited to acidic conditions. In this work, a copper-based Fenton-like catalyst Cu/Al2O3/g-C3N4 was proposed that achieves high degradation efficiencies for Rhodamine B (Rh B) in a wide range of pH 4.9–11.0. The Cu/Al2O3 composite was first prepared via a hydrothermal method followed by a calcination process. The obtained Cu/Al2O3 composite was subsequently stabilized on graphitic carbon nitride (g-C3N4) by the formation of C−O−Cu bonds. The obtained composites were characterized through FT-IR, XRD, TEM, XPS, and N2 adsorption/desorption isotherms, and the immobilized Cu+ was proven to be active sites. The effects of Cu content, g-C3N4 content, H2O2 concentration, and pH on Rh B degradation were systematically investigated. The effect of the catalyst dose was confirmed with a specific reaction rate constant of (5.9 ± 0.07) × 10−9 m·s−1 and the activation energy was calculated to be 71.0 kJ/mol. In 100 min 96.4% of Rh B (initial concentration 20 mg/L, unadjusted pH (4.9)) was removed in the presence of 1 g/L of catalyst and 10 mM of H2O2 at 25 °C, with an observed reaction rate constant of 6.47 × 10−4 s−1. High degradation rates are achieved at neutral and alkaline conditions and a low copper leaching (0.55 mg/L) was observed even after four reaction cycles. Hydroxyl radical (HO·) was identified as the reactive oxygen species by using isopropanol as a radical scavenger and by ESR analysis. HPLC-MS revealed that the degradation of Rh B on Cu/Al2O3/CN composite involves N-de-ethylation, hydroxylation, de-carboxylation, chromophore cleavage, ring opening, and the mineralization process. Based on the results above, a tentative mechanism for the catalytic performance of the Cu/Al2O3/g-C3N4 composite was proposed. In summary, the characteristics of high degradation rate constants, low ion leaching, and the excellent applicability in neutral and alkaline conditions prove the Cu/Al2O3/g-C3N4 composite to be a superior Fenton-like catalyst compared to many conventional ones.

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Section: Structural Characterization Of Compositesmentioning

confidence: 84%

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

et al. 2020

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“…Under the irradiation of xenon lamp, the system could achieve the removal of 78.76% atrazine in 120 min. reaction [66].…”

Section: Graphitic-carbon Nitride Composites Activated Pmsmentioning

confidence: 99%

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment

Liu

You

et al. 2019

IJERPH

104

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Atrazine is a kind of triazine herbicide that is widely used for weed control due to its good weeding effect and low price. The study of atrazine removal from the environment is of great significance due to the stable structure, difficult degradation, long residence time in environment, and toxicity on the organism and human beings. Therefore, a number of processing technologies are developed and widely employed for atrazine degradation, such as adsorption, photochemical catalysis, biodegradation, etc. In this article, with our previous research work, the progresses of researches about the treatment technology of atrazine are systematically reviewed, which includes the four main aspects of physicochemical, chemical, biological, and material-microbial-integrated aspects. The advantages and disadvantages of various methods are summarized and the degradation mechanisms are also evaluated. Specially, recent advanced technologies, both plant-microbial remediation and the material-microbial-integrated method, have been highlighted on atrazine degradation. Among them, the plant-microbial remediation is based on the combined system of soil-plant-microbes, and the material-microbial-integrated method is based on the synergistic effect of materials and microorganisms. Additionally, future research needs to focus on the excellent removal effect and low environmental impact of functional materials, and the coordination processing of two or more technologies for atrazine removal is also highlighted.

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“…An activated carbon/g-C 3 N 4 composite was also reported for efficient atrazine degradation by the activation of HSO 5 – . Activated carbon suppressed the recombination of photoexcited electron–hole pairs generated from g-C 3 N 4 , whereas HSO 5 – produced sulfate (SO 4 •– ) and • OH radicals from the resulted exciting holes and electrons for degradation.…”

Section: Detoxification Of Edsmentioning

confidence: 99%

Detoxification of Endocrine Disruptors in Water Using Visible-Light-Active Nanostructures: A Review

UshaVipinachandran

Rajendran

Haroon

et al. 2020

ACS Appl. Nano Mater.

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The scarcity of pure water has become a global and major concern because of rapid industrialization in modern and exponentially populated civilization. No life can exist without water, and contamination-free water for the whole ecosystem is a primary demand. Therefore, the enhanced rate of water contamination and the infliction of living beings are considered to be challenging issues. It attracts great attention in the scientific community when water pollution by multifarious endocrine disruptors (EDs) such as plasticizers, herbicides, insecticides, pharmaceutical and personal care products, and food additives and sweeteners, which are discharged from industries, reach water resources, and finally appear in drinking water, is involved. The chemical contaminants of EDs disturb the functions of glands from where hormones or juices are secreted and mix with blood directly. Their persistence results in adverse toxic effects in all living beings, for example, declining reproduction, endometriosis, cancer, and many more diseases. These are not easily mineralized or removed from water compared to various organic dye molecules because of their typical characteristic light absorption in the UV region. Therefore, it is very urgent to mineralize wastewater from such types of contaminants. Among the existing technologies, visible-light-triggered photocatalytic degradation is accredited as cost-effective, renewable, and environmentally friendly. Besides, the utilization of cheap visible light as a driving force with strong mineralization efficiency under facile reaction conditions and no harmful end products enables it to have a more beneficial effect. This review describes different classes of EDs, their adverse toxic effects, and efficient degradation through remarkable active nanomaterials/nanocomposites reported from 2015 to 2020. The detailed mechanisms of pollutant adsorption on the nanostructure surface and their decomposition actions have been interpreted. Also, different pollutant degradation pathways have been attentively considered and well-explained. Besides, the future outlook has been elucidated at the end.

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Peroxymonosulfate improved photocatalytic degradation of atrazine by activated carbon/graphitic carbon nitride composite under visible light irradiation

Cited by 115 publications

References 40 publications

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

Kinetic and Mechanistic Study of Rhodamine B Degradation by H2O2 and Cu/Al2O3/g-C3N4 Composite

A Review on Recent Treatment Technology for Herbicide Atrazine in Contaminated Environment

Detoxification of Endocrine Disruptors in Water Using Visible-Light-Active Nanostructures: A Review

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