Removal of hexavalent chromium from aqueous solution by iron nanoparticles / 浙江大学学报(英文版)(B辑:生物医学和生物技术)
Journal of Zhejiang University. Science. B
;
(12): 1022-1027, 2005.
Artigo
em Inglês
| WPRIM
| ID: wpr-263264
ABSTRACT
Groundwater remediation by nanoparticles has received increasing interest in recent years. This report presents a thorough evaluation of hexavalent chromium removal in aqueous solutions using iron (Fe(0)) nanoparticles. Cr(VI) is a major pollutant of groundwater. Zero-valent iron, an important natural reductant of Cr(VI), is an option in the remediation of contaminated sites, transforming Cr(VI) to essentially nontoxic Cr(III). At a dose of 0.4 g/L, 100% of Cr(VI) (20 mg/L) was degraded. The Cr(VI) removal efficiency decreased significantly with increasing initial pH. Different Fe(0) type was compared in the same conditions. The reactivity was in the order starch-stabilized Fe(0) nanoparticles>Fe(0) nanoparticles>Fe(0) powder>Fe(0) filings. Electrochemical analysis of the reaction process led to the conclusion that Cr(OH)(3) should be the final product of Cr(VI). Iron nanoparticles are good choice for the remediation of heavy metals in groundwater.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Oxirredução
/
Espectrofotometria Ultravioleta
/
Amido
/
Poluentes Químicos da Água
/
Microscopia Eletrônica de Varredura
/
Química
/
Cromo
/
Nanoestruturas
/
Eletroquímica
/
Água Doce
Idioma:
Inglês
Revista:
Journal of Zhejiang University. Science. B
Ano de publicação:
2005
Tipo de documento:
Artigo
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