Journal of Hazardous Materials

 

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Journal of Hazardous Materials


journal homepage: www.elsevier.com/locate/react

 journal of hazardous materials

Review

Heterogeneous Fenton catalysts: A review of recent advances

Nishanth Thomas a,b, Dionysios D. Dionysiou c, Suresh C. Pillai a,b,* 


 
 ABSTRACT
Heterogeneous Fenton catalysts are emerging as excellent materials for applications related to water purification. In this review, recent trends in the synthesis andHeterogeneous Fenton catalysts are emerging as excellent materials for applications related to water purification. In this review, recent trends in the synthesis andapplication of heterogeneous Fenton catalysts for the abatement of organic pollutants and disinfection of microorganisms are discussed. It is noted that as thecomplexity of cell wall increases, the resistance level towards various disinfectants increases and it requires either harsh conditions or longer exposure time for thecomplete disinfection. In case of viruses, enveloped viruses (e.g. SARS-CoV-2) are found to be more susceptible to disinfectants than the non-enveloped viruses. Theintroduction of plasmonic materials with the Fenton catalysts broadens the visible light absorption efficiency of the hybrid material, and incorporation of semiconductormaterial improves the rate of regeneration of Fe(II) from Fe(III). A special emphasis is given to the use of Fenton catalysts for antibacterial applications.Composite materials of magnetite and ferrites remain a champion in this area because of their easy separation and reuse, owing to their magnetic properties. Ironminerals supported on clay materials, perovskites, carbon materials, zeolites and metal-organic frameworks (MOFs) dramatically increase the catalytic degradationrate of contaminants by providing high surface area, good mechanical stability, and improved electron transfer. Moreover, insights to the zero-valent iron and itscapacity to remove a wide range of organic pollutants, heavy metals and bacterial contamination are also discussed. Real world applications and the role of naturalorganic matter are summarised. Parameter optimisation (e.g. light source, dosage of catalyst, concentration of H2O2 etc.), sustainable models for the reusability orrecyclability of the catalyst and the theoretical understanding and mechanistic aspects of the photo-Fenton process are also explained. Additionally, this reviewsummarises the opportunities and future directions of research in the heterogeneous Fenton catalysis.

  1. Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Irelanda Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Ireland
  2. Centre for Precision Engineering, Materials and Manufacturing Research (PEM), Institute of Technology Sligo, Sligo, Ireland
  3. Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, USA

* Corresponding author at: Nanotechnology and Bio-engineering Research Group, Department of Environmental Science, Institute of Technology Sligo, Sligo, Ireland. E-mail address: This email address is being protected from spambots. You need JavaScript enabled to view it. (S.C. Pillai).

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Reactive & Functional Polymers

 

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Reactive & Functional Polymers


journal homepage: www.elsevier.com/locate/react

 

Review

New agro-technology (Imec) by hydrogel membrane

Yuichi Mori *

CEO of Mebiol Inc., 1-25-8 Nakahara, Hiratsuka, Kanagawa 254-0075, Japan




 
 ARTICLE INFO  ABSTRACT
Keywords:

Sustainable agriculture

Hydromembrane

Imec

 We have developed an unborn agro-technology (Imec) which grows safe and nutritious produces minimizing water and soil consumption by supplying culture medium through an advanced membrane (Hydromembrane) to the produces. Hydromembrane plays the following roles; (1) Hydromembrane having numerous nano-pores whose size is strictly controlled, absorbs water and nutrients but excludes viruses and microbes. Therefore, even if the culture medium is contaminated or decayed, the produces are not diseased. (2) Hydromembrane absorbs the culture medium but does not release it to the produces. So they allow a lot of fine roots to adhere onto Hydromembrane and also synthesize a large quantity of sugar, amino acids, etc. in order to sack aggressively the bonding water in Hydromembrane by osmotic gap, leading to high nutrition. (3) Hydromembrane eliminates the need for soil which has been the biggest hurdle for industrialization of farming. The production cost is overwhelmingly reduced by its volume and also the used Hydromembrane is safely incinerated or recycled by dissolving in hot water. Imec has rapidly spread to over 10 ha and over 60 facilities in tomato production these 3 years in Japan. Besides tomato, cucumber, melon, paprika and greens like lettuce are produced by Imec. Overseas Imec successfully produced tomato in the mid of Dubai desert. Imec is expected to render sustainability to current agriculture.

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