Poly[beta-(1-->4)-2-amino-2-deoxy-D-glucopyranose] based zero valent nickel nanocomposite for efficient reduction of nitrate in water.

4)-2-amino-2-deoxy-D-glucopyranose] based zero valent nickel nanocomposite for efficient reduction of nitrate in water. -->
Autoři: Adewuyi S; Department of Chemistry College of Natural Science, University ofAgriculture Abeokuta, PMB 2240 Abeokuta, Ogun, 100001, Nigeria. adewuyis@unaab.edu.ng, Sanyaolu NO, Amolegbe SA, Sobola AO, Folarin OM
Zdroj: Journal of environmental sciences (China) [J Environ Sci (China)] 2012; Vol. 24 (9), pp. 1702-8.
Způsob vydávání: Journal Article
Jazyk: English
Informace o časopise: Publisher: IOS Press Country of Publication: Netherlands NLM ID: 100967627 Publication Model: Print Cited Medium: Print ISSN: 1001-0742 (Print) Linking ISSN: 10010742 NLM ISO Abbreviation: J Environ Sci (China) Subsets: MEDLINE
Imprint Name(s): Publication: Amsterdam : IOS Press
Original Publication: Beijing : Editorial Dept. of Journal of Environmental Sciences (China), 1989-
Výrazy ze slovníku MeSH: Glucose/*analogs & derivatives , Glucose/*chemistry , Nanocomposites/*chemistry , Nickel/*chemistry , Nitrates/*chemistry , Water Pollutants, Chemical/*chemistry, Nanoparticles ; Water Purification
Abstrakt: Chemical reduction of nitrate using metal nanoparticles has received increasing interest due to over-dependence on groundwater and consequence health hazard of the nitrate ion. One major drawback of this technique is the agglomeration of nanoparticles leading to the formation of large flocs. A low cost biopolymeric material, poly [beta-(1-->4)-2-amino-2-deoxy-D-glucopyranose] (beta-PADG) obtained from deacetylated chitin was used as stabilizer to synthesize zero valent nickel (ZVNi) nanoparticles. The beta-PADG-ZVNi nanocomposite was characterized using infra red (IR), UV-Vis spectrophotometric techniques and Scanning Electron Microscope (SEM). The morphology of the composite showed that beta-PADG stabilized-ZVNi nanoparticles were present as discrete particles. The mean particle size was estimated to be (7.76 +/- 2.98) nm and surface area of 87.10 m2/g. The stabilized-ZVNi nanoparticles exhibited markedly greater reactivity for reduction of nitrate in water with 100% conversion within-2 hr contact owing to less agglomeration. Varying the beta-PADG-to-ZVNi ratio and the ZVNi-to-nitrate molar ratio generally led to a faster nitrate reduction. About 3.4-fold difference in the specific reaction rate constant suggests that the application of the beta-PADG-stabilizer not only increased the specific surface area of the resultant nanoparticles, but also greatly enhanced the surface reactivity of the nanoparticles per unit area.
Substance Nomenclature: 0 (Nitrates)
0 (Water Pollutants, Chemical)
7OV03QG267 (Nickel)
IY9XDZ35W2 (Glucose)
Entry Date(s): Date Created: 20130326 Date Completed: 20130502 Latest Revision: 20190911
Update Code: 20231215
DOI: 10.1016/s1001-0742(11)60903-0
PMID: 23520880
Autor: Adewuyi S; Department of Chemistry College of Natural Science, University ofAgriculture Abeokuta, PMB 2240 Abeokuta, Ogun, 100001, Nigeria. adewuyis@unaab.edu.ng, Sanyaolu NO, Amolegbe SA, Sobola AO, Folarin OM
Jazyk: angličtina
Zdroj: Journal of environmental sciences (China) [J Environ Sci (China)] 2012; Vol. 24 (9), pp. 1702-8.
DOI: 10.1016/s1001-0742(11)60903-0
Abstrakt: Chemical reduction of nitrate using metal nanoparticles has received increasing interest due to over-dependence on groundwater and consequence health hazard of the nitrate ion. One major drawback of this technique is the agglomeration of nanoparticles leading to the formation of large flocs. A low cost biopolymeric material, poly [beta-(1-->4)-2-amino-2-deoxy-D-glucopyranose] (beta-PADG) obtained from deacetylated chitin was used as stabilizer to synthesize zero valent nickel (ZVNi) nanoparticles. The beta-PADG-ZVNi nanocomposite was characterized using infra red (IR), UV-Vis spectrophotometric techniques and Scanning Electron Microscope (SEM). The morphology of the composite showed that beta-PADG stabilized-ZVNi nanoparticles were present as discrete particles. The mean particle size was estimated to be (7.76 +/- 2.98) nm and surface area of 87.10 m2/g. The stabilized-ZVNi nanoparticles exhibited markedly greater reactivity for reduction of nitrate in water with 100% conversion within-2 hr contact owing to less agglomeration. Varying the beta-PADG-to-ZVNi ratio and the ZVNi-to-nitrate molar ratio generally led to a faster nitrate reduction. About 3.4-fold difference in the specific reaction rate constant suggests that the application of the beta-PADG-stabilizer not only increased the specific surface area of the resultant nanoparticles, but also greatly enhanced the surface reactivity of the nanoparticles per unit area.
Databáze: MEDLINE
Externí odkaz: