Nanomaterials enabled photoelectrocatalysis for removing pollutants in the environment and food

Zeng, Jing; Xu, Ran; El-Kady, Ahmed A.; Oranj, Behrouz Tajdar; Ahmed, Rajib; Valentin, Romanovski; Hu, Xiaofeng; Wu, Wenqin; Wang, Du; Mao, Jin; Wu, Huimin; Gu, Xin; Li, Peiwu; Xu, Weilin; Zhang, Zhaowei

doi:10.1016/j.trac.2023.117187

TrAC Trends in Analytical Chemistry

2023

DOI: 10.1016/j.trac.2023.117187

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Nanomaterials enabled photoelectrocatalysis for removing pollutants in the environment and food

Jing Zeng,

Ran Xu,

Ahmed A. El-Kady

et al.

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2024

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Cited by 8 publications

References 98 publications

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Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Romanovski,

Moskovskikh,

Tan

et al. 2024

Engineering Reports

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A method has been developed for separating a mixture of calcium, magnesium and sodium sulfates obtained through the interaction of sulfuric acid and waste from the water purification process generated by using membrane filters. The primary goal of this method is to extract gypsum and produce gypsum‐based binders. Patterns were identified regarding how various types, ratio and quantities of additives: blast furnace slag, granite screenings, portland cement, electric steel smelting slag affect the water‐gypsum ratio, strength properties, and water resistance of high‐strength gypsum binders. It was found that adding a single‐component additive specifically to enhance water resistance does not significantly impact these properties. Complex additives have been developed based on Portland cement, granulated blast furnace slag, electric furnace slag, expanded clay dust, and granite screenings of various fractions. These additives are designed to maximize the water resistance of high‐strength gypsum binder based on synthetic calcium sulfate dihydrate. As a result, the water resistance coefficient increased from 0.45 to 0.52. Additionally, a technological block diagram of the process has been proposed.

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Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Romanovski,

Moskovskikh,

Tan

et al. 2024

Engineering Reports

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Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

Romanovski,

Pilipenko,

Dubina

et al. 2024

Engineering Reports

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The article presents the results of experimental studies of the efficiency of purification of model and real wastewater from dyeing and finishing industries using pneumatic flotation using an ozone‐air mixture instead of air and a combination of ultrasonic treatment and ozonation. The influence of gas mixture consumption, dye concentration, and ozone concentration in the gas mixture on the cleaning efficiency was studied. The purification efficiency was assessed by optical density and COD. By using an ozone‐air mixture instead of air in the flotation process, an efficiency increase of up to 12 times was achieved. It has also been shown that wastewater treatment efficiency increases by up to 12% when combining ozone‐air flotation with ultrasonic treatment at 630 W and operating frequency 22% ± 10% kHz. This effect may be associated, first of all, with the dispersion of bubbles of the ozone‐air mixture, which leads to an increase in their total surface and, accordingly, to the rise in the kinetics of mass transfer—ozone dissolution.

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Optimizing Oil-Contaminated Wastewater Purification with Polypropylene Thread Waste

Gruzinova,

Romanovski

2024

Waste Biomass Valor

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The increasing generation of oil-containing wastewater poses significant environmental challenges, necessitating the development of effective and sustainable filtration materials. Polypropylene thread scraps, a waste product from textile manufacturing, present a potential low-cost alternative to industrially produced polypropylene fibrous filters. This study evaluates the filtration properties of these scraps to determine their viability for oil product removal from wastewater. The polypropylene thread scraps exhibited promising physical characteristics: a fiber diameter range of 10–120 μm, bulk density between 100 and 200 kg/m3, total porosity of 78–89%, and a specific surface area of 75 m2/kg. Their hydrophobic nature is comparable to that of commercial polypropylene filter materials. Experimental studies demonstrated that the thread scraps could effectively remove oil products at a 70% efficiency, with a maximum specific wastewater volume of 8 L/g. The oil capacity for oil products was measured at 51.1 mg/g, which decreased to 36.2 mg/g after regeneration by washing with hot water at 70 °C. The optimal filtration parameters were identified as a material packing density of 65 kg/m3, filtration speed of 3.5 m/h, and a loading height of 1.5 m, achieving removal efficiencies of 82.0% for oil products and 91.5% for suspended solids. Polypropylene thread scraps demonstrate significant potential as a sustainable filtration material for oil-containing wastewater, offering comparable performance to industrial filters. Their ability to be regenerated and reused further enhances their cost-effectiveness and environmental benefits. This research supports the use of polypropylene thread scraps as a viable solution for wastewater treatment, contributing to waste reduction and improved environmental management. Graphical abstract

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Nanomaterials enabled photoelectrocatalysis for removing pollutants in the environment and food

Cited by 8 publications

References 98 publications

Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Gypsum Binder With Increased Water Resistance Derived From Membrane Water Desalination Waste

Optimizing Dye Wastewater Purification: Ultrasonic and Flotation With Ozonation Synergy

Optimizing Oil-Contaminated Wastewater Purification with Polypropylene Thread Waste

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