Photocatalytic degradation of tetracycline using a novel WO3–ZnO/AC under visible light irradiation: Optimization of effective factors by RSM-CCD

Environmental Pollution, Год журнала: 2024, Номер 347, С. 123746 - 123746

Опубликована: Март 7, 2024

Язык: Английский

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In-situ optical water quality monitoring sensors—applications, challenges, and future opportunities

Frontiers in Water, Год журнала: 2024, Номер 6

Опубликована: Апрель 22, 2024

Water quality issues remain a major cause of global water insecurity, and real-time low-cost monitoring solutions are central to the remediation management pollution. Optical sensors, based on fluorescence, absorbance, scattering reflectance-based principles, provide effective (WQM) solutions. However, substantial challenges their wider adoption across scales environments amid cost calibration-related concerns. This review discusses current future in optical multi-peak full-spectrum light-scattering remotely sensed surface reflectance. We highlight that fluorescence-based sensors can detect relatively low concentrations aromatic compounds (e.g., proteins humic acids) quantify trace organic pollution sewage or industrial effluents). Conversely, absorbance-based (Ultraviolet-Visible-Infra-red, UV-VIS-IR) suitable for range physiochemical variables nitrate, dissolved carbon turbidity). Despite being accurate under optimal conditions, measuring fluorescence absorbance be demanding dynamic due ambient temperature turbidity effects. Scattering-based detailed understanding sediment transport and, conjunction, improve accuracy measurements. Recent advances micro-sensing components such as mini-spectrometers light emitting diodes (LEDs), deep computing exciting prospects in-situ analysis (excitation-emission matrices) improved interferants reduce signal-to-noise ratio, detection accuracies existing pollutants, enable newer contaminants. examine applications combining spectroscopy reflectance scaling WQM large rivers, lakes marine bodies scale from point observations monitor algal blooms, load, oil spills. Lastly, we an overview techniques detecting emerging contaminants treated natural waters. advocate greater synergy between industry, academia public policy control management.

Язык: Английский

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Photocatalytic Degradation of Tetracycline Hydrochloride Using TiO2/CdS on Nickel Foam Under Visible Light and RSM–BBD Optimization

Catalysts, Год журнала: 2025, Номер 15(2), С. 113 - 113

Опубликована: Янв. 24, 2025

This study investigates the photocatalytic degradation of tetracycline hydrochloride (TCH) using a TiO2/CdS composite nanocatalyst synthesized on flexible nickel foam via dipping–pull method. By comparing TCH by with different precursor ratios, it was found that TiO2/CdS-1.43% exhibited better performance. The X-ray diffraction (XRD) pattern retains characteristic peaks both TiO2 and CdS, indicating successful formation composite. According to analysis ultraviolet–visible spectroscopy (UV–Vis), absorption edge is approximately 530 nm. transmission electron microscopy (TEM) images show Cd S evenly, densely distributed in TiO2/CdS, further validating its synthesis. photoelectron (XPS) reveals Ti elements exist forms Cd2+ Ti4+, respectively. loading uniformity assessed super-depth microscopy. removal efficiency 10 L 20 mg/L solution achieved 53.89%, respectively, under response surface methodology—Box–Behnken design (RSM–BBD) optimal conditions (28 g catalyst, 325 rpm, pH = 9.04 within 150 min). Furthermore, five successive cycling experiments demonstrated strong stability, catalyst loss only 4.44%. Finally, free radical scavenging revealed ·O2− radicals are primary active species. highlights potential composites supported for efficient antibiotic pollutants water.

Язык: Английский

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Fluorescence spectroscopy as an indicator tool for pharmaceutical contamination in groundwater and surface water

Chemosphere, Год журнала: 2025, Номер 372, С. 144009 - 144009

Опубликована: Янв. 18, 2025

Knowledge of contaminant distribution and transport plumes in groundwater is important for effective remediation. Tedious expensive laboratory analyses could be supplemented with optical measurements such as fluorescence to offer a rapid alternative the potential on-site measurements. Here, we explore applicability spectroscopy an identifying extent plume Grindsted, Denmark. We show that three abundant contaminants (sulfanilamide, sulfaguanidine, sulfanilic acid) emit very strong, but highly similar distinct from naturally occurring organic matter. The limit detection sum these was 14 142 μg/L using benchtop handheld sensors, respectively. demonstrate low-volume solid-phase extractions can tool lower limits through selective enrichment contaminants. However, co-occurrence natural anthropogenic fluorescent matter presents significant challenge reliable quantification high similarity between investigated poses machine learning approaches are commonly used increase sensitivity selectivity. Nonetheless, results how applied viable indicator classification identify pharmaceutical contamination groundwater, well surface waters.

Язык: Английский

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Co-hydrothermal carbonization of lignocellulosic biomass and swine manure for humic substance abundant target products: impacts of hydrothermal temperature and feedstock composition

Journal of environmental chemical engineering, Год журнала: 2025, Номер unknown, С. 116280 - 116280

Опубликована: Март 1, 2025

Язык: Английский

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New Rapid Methods for Assessing the Production and Removal of Labile Organic Carbon in Water Treatment Using Fluorescence and Oxygen Measurements

ACS ES&T Water, Год журнала: 2025, Номер unknown

Опубликована: Март 28, 2025

Язык: Английский

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Nitrogen removal via solid carbon source-driven heterotrophic nitrification and aerobic denitrification in marine aquaculture wastewater

Journal of Water Process Engineering, Год журнала: 2025, Номер 73, С. 107697 - 107697

Опубликована: Апрель 15, 2025

Язык: Английский

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Tri-protonated ferrate: A novel electro-synthesised pre-oxidant/coagulant for NOM and DBP precursors removal in drinking water production

Journal of Water Process Engineering, Год журнала: 2023, Номер 57, С. 104570 - 104570

Опубликована: Ноя. 27, 2023

Язык: Английский

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Dissolved Organic Matter Behaviour by Conventional Treatments of a Drinking Water Plant: Controlling Its Changes with EEM-PARAFAC

Applied Sciences, Год журнала: 2024, Номер 14(6), С. 2462 - 2462

Опубликована: Март 14, 2024

In the last 20 years, several articles related to use of fluorescence excitation–emission matrices—parallel factor analysis (EEM-PARAFAC) monitor dissolved organic matter (DOM) in drinking- and wastewater treatment plants were published. Noteworthy, its respective quality control laboratories remains scarce. To extend popularisation, this work, EEM-PARAFAC was employed analyse DOM composition changes along different stages drinking water plant administrated by Società Metropolitana Acque Torino. The best PARAFAC model one three components, indicating that Po River is constituted, mainly, humic acid-like (HA-L) tryptophan-like (Try-L) substances, tyrosine-like ones being negligible (Tyr-L). Results indicated physical treatments (sedimentation) did not produce a reduction scores; however, 50% decay 254 nm absorbance observed. Fluorescent only removed with chemical treatments, obtaining ca. 70% HA-L scores ozonation 40% chlorination. Furthermore, although degraded Try-L increased 25%, transformation into smaller molecules. On contrary, total carbon measurements exhibited significant change when comparing plant’s inlet outlet (approximately 45% decrease), but within intermediate processes.

Язык: Английский

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Bioavailability of dissolved organic matter (DOM) derived from seaweed Gracilaria lemaneiformis meditated by microorganisms

Marine Pollution Bulletin, Год журнала: 2024, Номер 209, С. 117243 - 117243

Опубликована: Ноя. 9, 2024

Язык: Английский

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