Oilfield-produced water treatment using bare maghemite nanoparticles

Results in Engineering, Journal Year: 2022, Volume and Issue: 16, P. 100641 - 100641

Published: Sept. 13, 2022

Oilfield-produced water (PW) can be cleaned using a variety of techniques. However, traditional methods are often expensive and generate secondary waste that pollutes the environment. In addition, PWs contain highly stable micronized dispersed oil, which makes conventional treatment ineffective in meeting regulatory requirements. As result their unique properties, magnetized nanoparticles effectively remove emulsified dissolved oil from PW. This study aims to evaluate residual removal efficiency bare maghemite (γ-Fe2O3) treating oilfield-produced (produced water). Several techniques for manufacturing were evaluated select one is both cost-effective produces high-quality nanoparticles. After with selected method, mineral composition properties determined. Subsequent experiments used synthetic commercial treat samples derived gas wells. By measuring content PW before after treatment, efficiencies Nanoparticles recovered treated samples, washed, reused. Over ten times, they recycled. The recycling potential by assessing reduction recycling. Using fresh nanoparticles, over 98% removed. Even more than 11 was below disposal limit. slight observed. could attributed dissolution carryover during treatment/demulsification operation.

Language: Английский

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Synergistic effects of plasma and catalyst in formaldehyde conversion over a Ni/α-Al2O3 catalyst in a dielectric barrier discharge reactor

Results in Engineering, Journal Year: 2023, Volume and Issue: 17, P. 100997 - 100997

Published: March 1, 2023

Plasma-catalytic conversion of formaldehyde, as a representative volatile organic compound, in dielectric barrier discharge reactor over NiOx/α-Al2O3 catalyst was studied. Effects plasma treatment on the physicochemical properties were studied and XPS analysis showed that increased surface contribution more active sites (i.e. Ni2+ adsorbed O). However, physical catalyst, including BET area porosity, did not significantly change after exposure. Presence oxygen plasma-catalytic process improved efficiency. Individual roles selective formaldehyde to CO2, desired product, decoupled. It found that, oxygen-containing atmosphere, can enhance due facilitating role O2-derived intermediates, such ozone, while improves selectivity toward CO2 through catalyzing complete oxidation path. Catalysts make substantial improvement compared corresponding plasma-only conditions, even an oxygen-free environment. Comparison between plasma-only, catalyst-only, conditions with in-plasma (IPC) post-plasma (PPC) configurations yield decreased following order: IPC > PPC catalyst-only plasma-only. Superior performance under to: i) upon treatment; ii) facilitated CHO formation impacts both catalyst; iii) dominance catalytic reaction steps resulting presence catalyst. The system greater than summation demonstrating synergistic effects These results provide new insights into conversion, beneficial selectivity,

Language: Английский

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FUTURE TRENDS FOR GREEN ENVIRONMENTAL APPLICATIONS OF NANOTECHNOLOGY: A REVIEW

Anbar Journal of Agricultural Sciences, Journal Year: 2023, Volume and Issue: 21(1), P. 133 - 147

Published: June 30, 2023

Providing a clean and safe environment is one of the great challenges facing humanity. As result various human activities over thousands years in field agriculture, industry, housing, burning fuel elimination forests agricultural areas, has been greatly destroyed, water, air soil are polluted, this resulted several risks problems that It began threatening humanity, perhaps most important which spread diseases epidemics caused by pollution, such as climate change global warming, major climatic led to storms floods on hand, drought, desertification water scarcity other hand. may also lead bigger deeper if we delay challenge. Green environmental applications nanotechnology have for sanitation (land, air) treatment pollution resulting from industrial activities, accommodation others. set low-cost solutions cleaning problems. Environmental protection prominent applied fields pays attention because interrelationship between health which-it lives. technology aims use less harmful gradually leads storage, distribution systems non-polluting environment. Thus, it reduces carbon dioxide emissions significantly, saves world problem or warming. Hence, article review future green ecological nanotechnology.

Language: Английский

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Regulation of nanomaterials in agriculture, food, and environment

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 57 - 61

Published: Jan. 1, 2024

Language: Английский

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FeCo alloy nanoparticles supported on N-doped mesoporous carbon spheres for effective degradation of antibiotics and industrial dyes

Deleted Journal, Journal Year: 2024, Volume and Issue: 2, P. 100003 - 100003

Published: April 27, 2024

Iron (Fe) is widely recognized for its effectiveness in the Fenton reaction and commonly used wastewater treatment. However, exploring other metals similar Fenton-like reactions has been relatively limited. FeCo alloy nanoparticles (NPs), anchored on nitrogen-doped mesoporous carbon spheres (FeCo/NMCS), have effectively synthesized as a catalyst treatment under alkaline conditions. The NMCS exhibited spherical with an average diameter of 488.1 nm, while NPs, uniformly distributed over NMCS, had 8.2 nm. mesopores served anchoring points NiCo preventing their possible agglomeration. was composed 3.91 wt% nitrogen. With 30 mg FeCo/NMCS 25 mM H2O2, more than 92% tetracycline hydrochloride (TC) degraded within 35 min at pH levels 7, 9, 11. remarkable degradation rate attributed to dual active sites present alloys. rapid TC, even 11, indicates potential valuable solution Industrial reactive (Y145, R195, B222A) disperse dyes (O30, R167, B79) concentration 10 ppm were 20 when using H2O2 9. After five consecutive TC cycles 7 demonstrated consistent performance, emphasizing reusability. provides promising pollution control stability, superior catalytic activity, magnetic separability, recyclability.

Language: Английский

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