Photocatalytic Degradation of Emerging Contaminants: Artificial Sweeteners

Artificial sweeteners are posing a new threat to the environment. The water ecosystem is the primary recipient of these emerging contaminants. Once ingested, sufficient amount of these artificial sweeteners escape unchanged from the human body and are added to the environment. However, some are added in the form of their breakdown products through excretion. Artificial sweeteners are resistant to wastewater treatment processes and are therefore continuously introduced into the water environments. However, the environmental behavior, fate, and long-term ecotoxicological contributions of artificial sweeteners in our water resources still remain largely unknown. Some artificial sweeteners like saccharin are used as a food additive in animal feeds. It also forms the degradation product of the sulfonylurea herbicides. All artificial sweeteners enter into the wastewater treatment plants from the industries and households. From the effluents, they finally reside into the receiving environmental bodies including wastewaters, groundwaters, and surface waters. The global production of these sweeteners is several hundred tons annually and is continuously being added into the environment.

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Photocatalytic degradation of emerging contaminants in municipal wastewater treatment plant effluents using immobilized TiO2 in a solar pilot plant

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2011.01.030 ◽

2011 ◽

Vol 103 (3-4) ◽

pp. 294-301 ◽

Cited By ~ 197

Author(s):

N. Miranda-García ◽

S. Suárez ◽

B. Sánchez ◽

J.M. Coronado ◽

S. Malato ◽

...

Keyword(s):

Wastewater Treatment ◽

Photocatalytic Degradation ◽

Wastewater Treatment Plant ◽

Pilot Plant ◽

Emerging Contaminants ◽

Municipal Wastewater ◽

Treatment Plant ◽

Municipal Wastewater Treatment ◽

Municipal Wastewater Treatment Plant ◽

Immobilized Tio2

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Reaction intermediates during the photocatalytic degradation of emerging contaminants under visible or solar light

Visible Light Active Structured Photocatalysts for the Removal of Emerging Contaminants ◽

10.1016/b978-0-12-818334-2.00007-9 ◽

2020 ◽

pp. 163-193

Author(s):

Prasenjit Kar ◽

Govindasamy Sathiyan ◽

Raju Kumar Gupta

Keyword(s):

Photocatalytic Degradation ◽

Emerging Contaminants ◽

Solar Light ◽

Reaction Intermediates

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Health and ecological risk assessment of emerging contaminants (pharmaceuticals, personal care products, and artificial sweeteners) in surface and groundwater (drinking water) in the Ganges River Basin, India

The Science of The Total Environment ◽

10.1016/j.scitotenv.2018.07.235 ◽

2019 ◽

Vol 646 ◽

pp. 1459-1467 ◽

Cited By ~ 87

Author(s):

Brij Mohan Sharma ◽

Jitka Bečanová ◽

Martin Scheringer ◽

Anežka Sharma ◽

Girija K. Bharat ◽

...

Keyword(s):

Risk Assessment ◽

Drinking Water ◽

Ecological Risk ◽

Ecological Risk Assessment ◽

Emerging Contaminants ◽

Artificial Sweeteners ◽

Ganges River ◽

The Ganges ◽

Ganges River Basin ◽

Surface And Groundwater

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Perovskite Zinc Titanate Photocatalysts Synthesized by the Sol–Gel Method and Their Application in the Photocatalytic Degradation of Emerging Contaminants

Catalysts ◽

10.3390/catal11070854 ◽

2021 ◽

Vol 11 (7) ◽

pp. 854

Author(s):

Wei-Yu Chen ◽

Ching-Ping Wang ◽

Po-Chou Chen ◽

Kun-Yi Andrew Lin ◽

Surajit Ghosh ◽

...

Keyword(s):

Photocatalytic Degradation ◽

Emerging Contaminants ◽

Photocatalytic Performance ◽

Sol Gel ◽

Emerging Contaminant ◽

Zinc Titanate ◽

Gel Method ◽

Sol Gel Method ◽

Synthesis Conditions ◽

Additional Amount

In this study, perovskite ZnTiO3 photocatalysts were fabricated by the sol–gel method. The photocatalytic capability was verified by the degradation of the emerging contaminant, the antibiotic amoxicillin (AMX). For the preparation, the parameters of the calcination temperature and the additional amount of polyvinylpyrrolidone (PVP) and ammonia are discussed, including the calcining temperature (500, 600, 700, 800 °C), the volume of ammonia (750, 1500, 3000 μL), and the weight of PVP (3 g and 5 g). The prepared perovskite ZnTiO3 was characterized by XRD, FESEM, BET, and UV-Vis. It is shown that the perovskite ZnTiO3 photocatalysts are structurally rod-like and ultraviolet light-responsive. Consequently, the synthesis conditions for fabricating the perovskite ZnTiO3 photocatalysts with the highest photocatalytic performance were a calcining temperature of 700 °C, an additional ammonia amount of 1500 μL, and added PVP of 5 g. Moreover, the photocatalytic degradation of perovskite ZnTiO3 photocatalysts on other pollutants, including the antibiotic tetracycline (TC), methyl orange (MO), and methylene blue (MB) dyes, was also examined. This provides the basis for the application of perovskite ZnTiO3 as a photocatalyst to decompose emerging contaminants and organic pollutants in wastewater treatment.

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