Application Photocatalysis for Treatment of Industrial Waste Water—A Short Review

Das, Ranjana

doi:10.4236/oalib.1100713

Cited by 17 publications

(8 citation statements)

References 144 publications

(160 reference statements)

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“…These unwanted organic products contaminate water bodies such as lakes, rivers, oceans and aquifers, affecting the plants in the entire biosphere and the organisms living within them. The toxicity and stability of the contaminants and their growing quantity are one of the major concerns to the environmental protection and regulation authorities and require prompt activity employing environmental‐friendly methods, such as the degradation of organic dyes by photocatalytic methods ,…”

Section: Introductionmentioning

confidence: 99%

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst

et al. 2017

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The photocatalytic activity of titanium dioxide (TiO 2 ) has already been investigated and compared with that of other materials. The main goal of the current study is to functionalize TiO 2 with tin-doped carbon dots (Sn@C-dots/TiO 2 ) and explore the activity of this composite as a photocatalyst for the photodegradation of dye molecules. The new composite Sn@C-dots/ TiO 2 was prepared by a two-step sonochemical reaction: a) Formation of Sn@C-dots by ultrasonic irradiation of molten tin immersed in polyethylene glycol at 260 8C; b) Addition of TiO 2 and further sonication to induce the adhesion of the Sn@Cdots on the surface of the TiO 2 . The resulting composite was examined as a photocatalyst for the photodegradation of methylene blue and crystal violet under solar radiation and was found to exhibit better activity than commercial TiO 2 or C-dots/ TiO 2 . Doping C-dots with Sn and making hybrid Sn@C-dots/TiO 2 nanocomposites opens a new type of photocatalytic materials.[a] Dr.

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Section: Introductionmentioning

confidence: 99%

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst

et al. 2017

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“…Li et al 115 combined ozonation with biologically activated carbon filtration and the sponge membrane bioreactor with ozonation to remove the different AB contaminants from water. Photocatalysis SP techniques have gained significant interest due to being costeffective, ecofriendly, and known to be a sustainable technology with negligible waste production 116 . SP requires three components to carry out the degradation of the ABs using an oxidative mechanism, a catalyst with photosensitive (e.g., TiO 2 or inorganic semiconductors), a photon energy source, and an efficient oxidizing agent 22,24,30 .…”

Section: Ozonationmentioning

confidence: 99%

Proclivities for prevalence and treatment of antibiotics in the ambient water: a review

et al. 2020

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In the intial two decades of the twenty-first century, antibiotic (AB) resistance in human pathogens has emerged as a major challenge for water, sanitation, and public health. Considering these challenges, we critically reviewed AB-related studies with particular emphasis on their (i) patterns of consumption, (ii) pathway prevalences and environmental implications in ambient waters, and (iii) benefits and limitations of existing AB removal/purging techniques. We found that lifestyle, land use, urbanization, the ease of availability, and the tendency of the medical practitioners to recommend ABs are the key factors governing the AB use pathway and enrichment in the environment. In the developing world, the most prevalent group of ABs is quinolone, whereas in the developed world, older-generation AB groups are most prevalent. Further, enormous variability in the consumption of ABs around the globe is explicitly highlighted in this study. Ciprofloxacin has been reported in the highest concentration among all the ABs with 28–31 mg L−1 in the raw wastewater of the Indian subcontinent. We found that adsorption may be one of the most efficient AB removal techniques, and NaOH-activated carbon prepared from Macadamia nut shells is the most effective adsorbent identified to date. The literature showed that the Langmuir isotherm and pseudo-second-order kinetic model explain the AB adsorption mechanism most effectively. The future challenge lies in developing advanced protocols and markers to prioritize the strategy and simulate the ecotoxicities of the individual and a mixture of ABs.

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“…is gross negligence from various industrial units for releasing wastewater without any treatment into freshwater streams has posed grave threats to human health [2].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

Alosaimi

Azeem

Tahir

et al. 2021

Journal of Chemistry

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The rapid population growth and economic development have largely contributed to environmental pollution. Various advanced oxidation processes have been used as the most viable solution for the reduction of recalcitrant pollutants and wastewater treatment. Heterogeneous photocatalysis is one of the broadly used technologies for wastewater treatment among all advanced oxidation processes. Graphitic carbon nitride alone or in combination with various other semiconductor metal oxide materials acts as a competent visible light active photocatalyst for the removal of recalcitrant organic pollutants from wastewater. Rational designing of an environment-friendly photocatalyst through a facile synthetic approach encounters various challenges in photocatalytic technologies dealing with semiconductor metal oxides. Doping in g-C3N4 and subsequent coupling with metal oxides have shown remarkable enhancement in the photodegradation activity of g-C3N4-based nanocomposites owing to the modulation in g-C3N4 bandgap structuring and surface area. In the current study, a novel ternary Fe-doped g-C3N4/Ag2WO4 visible light active photocatalyst was fabricated through an ultrasonic-assisted facile hydrothermal method. Characterization analysis included SEM analysis, FTIR, XRD, XPS, and UV-Visible techniques to elucidate the morphology and chemical structuring of the as-prepared heterostructure. The bandgap energies were assessed using the Tauc plot. The ternary nanocomposite (Fe-CN-AW) showed increased photodegradation efficiency (97%) within 120 minutes, at optimal conditions of pH = 8, catalyst dose = 50 mg/100 ml, an initial RhB concentration of 10 ppm, and oxidant dose 5 mM under sunlight irradiation. The enhanced photodegradation of rhodamine B dye by ternary Fe-CN-AW was credited to multielectron transfer pathways due to insertion of a Fe dopant in graphitic carbon nitride and subsequent coupling with silver tungstate. The data were statistically assessed by the response surface methodology.

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Application Photocatalysis for Treatment of Industrial Waste Water—A Short Review

Cited by 17 publications

References 144 publications

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst

Proclivities for prevalence and treatment of antibiotics in the ambient water: a review

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

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Application Photocatalysis for Treatment of Industrial Waste Water—A Short Review

Cited by 17 publications

References 144 publications

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO2 Catalyst

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO2 Catalyst

Proclivities for prevalence and treatment of antibiotics in the ambient water: a review

Investigation of Fe-Doped Graphitic Carbon Nitride-Silver Tungstate as a Ternary Visible Light Active Photocatalyst

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Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst

Solar‐Light‐Driven Photocatalytic Activity of Novel Sn@C‐Dots‐Modified TiO₂ Catalyst