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Degradation of toxic PAHs in water and soil using potassium zinc hexacyanoferrate nanocubes
- Source :
- Journal of environmental management. 204(Pt 1)
- Publication Year :
- 2017
-
Abstract
- Polycyclic aromatic hydrocarbons (PAHs) the ubiquitous, persistent and carcinogenic environmental contaminants have raised concern worldwide. Recently, their removal methodologies are advanced after exploring nanomaterials. Therefore, degradation of selected toxic PAHs (3–5 rings) using potassium zinc hexacyanoferrate (KZnHCF) nanocubes was studied. Highly crystalline and sharp KZnHCF nanocubes (∼100 nm) were obtained by green route using sapindus mukorossi. In both water and soil, anthracene and phenanthrene were degraded to maximum extent (80–93%), whereas, the degradation of fluorene, chrysene and benzo (a) pyrene were ∼70–80%.Because of small size (lower molecular weight), large number of anthracene and phenanthrene molecules were adsorbed on catalyst as compared to other PAHs. Higher degradation of PAHs in water than in the soil is attributed to the easy absorption of PAHs on catalyst in water and slow diffusion of PAHs on organic content of soil. PAHs were degraded at the concentration of 50 mg/L, 25 mg catalyst dose, neutral pH and solar irradiation. Higher proficiency of the catalyst was revealed by degradation of PAHs into small and non-toxic by-products such as malealdehyde, 4-oxobut-2-enoic acid and o-xylene. Overall, the potential KZnHCF nanostructures open future scope for eradication of other pollutants from the environment.
- Subjects :
- Chrysene
Environmental Engineering
Potassium
Inorganic chemistry
chemistry.chemical_element
02 engineering and technology
Zinc
010501 environmental sciences
Management, Monitoring, Policy and Law
Fluorene
Xylenes
01 natural sciences
chemistry.chemical_compound
Soil
Soil Pollutants
Polycyclic Aromatic Hydrocarbons
Waste Management and Disposal
0105 earth and related environmental sciences
Pollutant
Anthracene
Water
General Medicine
Phenanthrene
Phenanthrenes
021001 nanoscience & nanotechnology
Biodegradation, Environmental
chemistry
Environmental chemistry
Pyrene
Adsorption
0210 nano-technology
Ferrocyanides
Subjects
Details
- ISSN :
- 10958630
- Volume :
- 204
- Issue :
- Pt 1
- Database :
- OpenAIRE
- Journal :
- Journal of environmental management
- Accession number :
- edsair.doi.dedup.....4499885ab948383e9572b94bc88ab7f1