Your browser doesn't support javascript.
loading
A novel superparamagnetic micro-nano-bio-adsorbent PDA/Fe3O4/BC for removal of hexavalent chromium ions from simulated and electroplating wastewater.
Li, Lincheng; Zhong, Dengjie; Xu, Yunlan; Zhong, Nianbing.
Afiliación
  • Li L; School of Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China.
  • Zhong D; School of Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China.
  • Xu Y; School of Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China. xuyunlan@cqut.edu.cn.
  • Zhong N; School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing, 400054, China.
Environ Sci Pollut Res Int ; 26(23): 23981-23993, 2019 Aug.
Article en En | MEDLINE | ID: mdl-31222649
In order to improve the adsorption efficiency of the adsorbent and solve the problem of separation difficulty, a novel superparamagnetic micro-nano-bio-adsorbent (PDA/Fe3O4/BC) was prepared by in situ self-assembly of polydopamine (PDA). The results of scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR), X-ray photoelectron spectrometer (XPS), and vibrating sample magnetometer (VSM) characterization showed that the size of bio-adsorbent was about 200 nm. PDA and Fe3O4 modifications increased the specific surface area of adsorbent, changed the surface functional group of biochar (BC), and made the adsorbent have super-high magnetization (294.76 emu g-1). PDA/Fe3O4/BC was applied to treat Cr wastewater. The results show that the adsorption of Cr by PDA/Fe3O4/BC includes single-layer and multilayer adsorption. The adsorption follows the pseudo-second-order kinetic model. The adsorption is spontaneous and endothermic, and its maximum adsorption capacity and activation energy are 25.25 mg g-1 at 318 K and 23.108 kJ mol-1, respectively. After adsorption treatment, PDA/Fe3O4/BC still possesses high magnetization (233.04 emu g-1). PDA/Fe3O4/BC can treat actual electroplating wastewater with Cr(VI) concentration from 20 mg L-1 to less than 0.2 mg L-1, which met the PRC discharge standard (GB/21900-2008) of electroplating pollutants. Graphical abstract.
Asunto(s)
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Eliminación de Residuos Líquidos / Galvanoplastia / Aguas Residuales Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes Químicos del Agua / Eliminación de Residuos Líquidos / Galvanoplastia / Aguas Residuales Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2019 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania