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- Title
Lignocellulosic biomass supported metal nanoparticles for the catalytic reduction of organic pollutants.
- Authors
Akhtar, Kalsoom; Ali, Fayaz; Sohni, Saima; Kamal, Tahseen; Asiri, Abdullah M.; Bakhsh, Esraa M.; Khan, Sher Bahadar
- Abstract
Lignocellulosic biomass waste is a cheap, eco-friendly, and sustainable raw material for a wide array of applications. In the present study, an easy, fast, and economically feasible route has been proposed for the preparation of different zero-valent metal nanoparticles (ZV-MNPs) based on Cu, Co, Ag, and Ni NPs using empty fruit bunch (EFB) biomass residue as support material. The catalytic efficiency of ZV-MNPs/EFB catalyst was investigated against five model pollutants, such as methyl orange (MO), congo red (CR), methylene blue (MB), acridine orange (AO), and 4-nitrophenol (4-NP) using NaBH4 as a source of hydrogen and electron. Comparative study revealed that among as-prepared ZV-MNPs/EFB catalysts, Cu-NPs immobilized onto EFB (Cu/EFB) exhibited maximum catalytic efficiency towards pollutant abasement. Degradation reactions were highly efficient, and were completed within a short time (4 min) in case of MO, CR, and MB, whilst AO and 4-NP were reduced in less than 15 min. Kinetic investigation revealed that the degradation rate of model pollutants accorded with pseudo-first order model. Furthermore, supported catalysts were easily recovered after the completion of experiment by simply pulling the catalyst from reaction system. Recyclability tests performed on Cu/EFB revealed that more than 97% of the reduction was achieved in case of MO dye for four successive cycles of reuse. The as-prepared heterostructure showed multifunctional properties, such as enhanced uptake of contaminants, high catalytic efficiency, and easy recovery, hence, offers great prospects in wastewater purification.
- Subjects
POLLUTANTS; CATALYTIC reduction; CATALYST supports; METHYLENE blue; ACRIDINE orange; RAW materials; PLATINUM nanoparticles; METAL nanoparticles
- Publication
Environmental Science & Pollution Research, 2020, Vol 27, Issue 1, p823
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-019-06908-y