Oxidative treatment of micropollutants present in wastewater: A special emphasis on transformation products, their toxicity, detection, and field-scale investigations

Singh, Adarsh; Majumder, Abhradeep; Saidulu, Duduku; Bhattacharya, Animesh; Bhatnagar, Amit; Gupta, Ashok Kumar

doi:10.1016/j.jenvman.2024.120339

Cited by 8 publications

(3 citation statements)

References 226 publications

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“…Among the different TC intermediates, the acute toxicity LD 50 values for P7, P9, and LC 50 for P9 (fathead minnow) could not be predicted. The toxicity levels of intermediates are classified based on their toxicity levels as follows; substances with LC 50 values of 1 mg/L or lower are considered very toxic, those with LC 50 values between 1 and 10 mg/L are labeled as toxic, substances with LC 50 values between 10 and 100 mg/L are classified as harmful, and those with LC 50 values exceeding 100 mg/L are deemed not harmful . TC exhibited acute toxicity values of 0.90, 5.44, and 1524.04 mg/kg for fathead minnow, LC 50 (96 h), D.…”

Section: Resultsmentioning

confidence: 99%

“…The toxicity levels of intermediates are classified based on their toxicity levels as follows; substances with LC 50 values of 1 mg/L or lower are considered very toxic, those with LC 50 values between 1 and 10 mg/L are labeled as toxic, substances with LC 50 values between 10 and 100 mg/L are classified as harmful, and those with LC 50 values exceeding 100 mg/L are deemed not harmful. 61 TC exhibited acute toxicity values of 0.90, 5.44, and 1524.04 mg/kg for fathead minnow, LC 50 (96 h), D. magna LC 50 (48 h), and oral rats LD 50 , respectively. The corresponding toxicity levels were categorized under very toxic, toxic, and toxic levels.…”

Section: Fementioning

confidence: 98%

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Kinetic Comparison of Photocatalysis with the Photo-Fenton Process on the Removal of Tetracycline Using Bismuth-Modified Lanthanum Orthoferrite Nanostructures

James,

Rodney,

N. K.

2024

ACS Appl. Nano Mater.

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In this study, we investigate visible-light-driven photocatalytic and photo-Fenton degradation of tetracycline (TC) using bismuth-impregnated lanthanum orthoferrite (Bi x La 1−x FeO 3 (x = 0, 0.01, 0.05, 0.07)) nanostructures. Bi doping significantly improves the removal of TC, with Bi 0.05 La 0.95 FeO 3 (LFO-Bi5) exhibiting optimal degradation. In both photocatalysis (PC) and photo-Fenton catalysis (PFC), the reaction follows pseudo-first-order kinetics, with LFO-Bi5 showing rate constants of 0.0065/min for PC and 0.02716/min for PFC, surpassing LaFeO 3 by 2.76 and 3.43 times, respectively. The long-term presence of photoexcited carriers in LFO-Bi5 is confirmed through transient PL, TRPL, and EIS studies. The superior degradation capabilities are attributed to radicals in photocatalysis and OH • radicals in photo-Fenton catalysis. The PFC exhibited faster kinetics due to the rapid production of OH • radicals via the Fe-redox cycle and direct dissociation of H 2 O 2 at oxygen vacancies. LFO-Bi5 demonstrates excellent photostability and reusability for up to six consecutive cycles. The degradation pathway and toxicological properties of the intermediates are analyzed, highlighting the potential of LFO-Bi5 catalysts in antibiotic-contaminated water treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Fementioning

confidence: 98%

Kinetic Comparison of Photocatalysis with the Photo-Fenton Process on the Removal of Tetracycline Using Bismuth-Modified Lanthanum Orthoferrite Nanostructures

James,

Rodney,

N. K.

2024

ACS Appl. Nano Mater.

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“…An example is estradiol, a female hormone, that can be transformed in soil to the transformation product estrone, a more estrogenic substance 19 . Wastewater treatment may also result in other transformation products that show (eco)toxicological potential 20 – 22 . Note that some hazards can exert an acute risk (e.g., allergens in food products) and as such their degree of persistence is subordinate.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to identify critical knowledge gaps for food safety in circular food systems

van Leeuwen,

Verschoor,

van der Fels-Klerx

et al. 2024

npj Sci Food

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The transition from linear production towards a circular agro-food system is an important step towards increasing Europe’s sustainability. This requires re-designing the food production systems, which inevitably comes with challenges as regards controlling the safety of our food, animals and the ecosystem. Where in current food production systems many food safety hazards are understood and well-managed, it is anticipated that with the transition towards circular food production systems, known hazards may re-emerge and new hazards will appear or accumulate, leading to new -and less understood- food safety risks. In this perspective paper, we present a simple, yet effective approach, to identify knowledge gaps with regard to food safety in the transition to a circular food system. An approach with five questions is proposed, derived from current food safety management approaches like HACCP. Applying this to two cases shows that risk assessment and management should emphasize more on the exposure to unexpected (with regards to its nature and its origin) hazards, as hazards might circulate and accumulate in the food production system. Five knowledge gaps became apparent: there’s a need for (1) risk assessment and management to focus more on unknown hazards and mixtures of hazards, (2) more data on the occurrence of hazards in by-products, (3) better understanding the fate of hazards in the circular food production system, (4) the development of models to adequately perform risk assessments for a broad range of hazards and (5) new ways of valorization of co-products in which a safe-by-design approach should be adopted.

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Enhanced removal of pesticide micropollutant and bacteria using solar light-assisted Ag-doped TiO2: prospects for environmental and health impacts

Huong,

Hoai,

Quyen

2024

Environ Geochem Health

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Oxidative treatment of micropollutants present in wastewater: A special emphasis on transformation products, their toxicity, detection, and field-scale investigations

Cited by 8 publications

References 226 publications

Kinetic Comparison of Photocatalysis with the Photo-Fenton Process on the Removal of Tetracycline Using Bismuth-Modified Lanthanum Orthoferrite Nanostructures

Kinetic Comparison of Photocatalysis with the Photo-Fenton Process on the Removal of Tetracycline Using Bismuth-Modified Lanthanum Orthoferrite Nanostructures

A novel approach to identify critical knowledge gaps for food safety in circular food systems

Enhanced removal of pesticide micropollutant and bacteria using solar light-assisted Ag-doped TiO2: prospects for environmental and health impacts

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