Your browser doesn't support javascript.
loading
Synthesis of chitosan-based grafting magnetic flocculants for flocculation of kaolin suspensions.
Liu, Chuang; Wang, Xiaoyu; Du, Sicong; Liang, Wenyan.
Afiliación
  • Liu C; Beijing Key Lab for Source Control Technology of Water Pollution; Engineering Research Center for Water Pollution Source Control & Eco-remediation; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
  • Wang X; Beijing Key Lab for Source Control Technology of Water Pollution; Engineering Research Center for Water Pollution Source Control & Eco-remediation; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
  • Du S; Beijing Key Lab for Source Control Technology of Water Pollution; Engineering Research Center for Water Pollution Source Control & Eco-remediation; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
  • Liang W; Beijing Key Lab for Source Control Technology of Water Pollution; Engineering Research Center for Water Pollution Source Control & Eco-remediation; College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China. Electronic address: lwy@bjfu.edu.cn.
J Environ Sci (China) ; 139: 193-205, 2024 May.
Article en En | MEDLINE | ID: mdl-38105047
ABSTRACT
A series of novel chitosan-based magnetic flocculants FS@CTS-P(AM-DMC) was prepared by molecular structure control. The characterization results showed that FS@CTS-P(AM-DMC) had a uniform size of about 21.46 nm, featuring a typical core-shell structure, and the average coating layer thickness of CTS-P(AM-DMC) was about 5.03 nm. FS@CTS-P(AM-DMC) exhibited excellent flocculation performance for kaolin suspension, achieved 92.54% turbidity removal efficiency under dosage of 150 mg/L, pH 7.0, even at high turbidity (2000 NTU) with a removal efficiency of 96.96%. The flocculation mechanism was revealed to be dominated by charge neutralization under acidic and neutral conditions, while adsorption and bridging effects play an important role in alkaline environments. The properties of magnetic aggregates during flocculation, breakage, and regeneration were studied at different pH levels and dosages. In the process of magnetophoretic, magnetic particles collide and adsorb with kaolin particles continuously due to magnetic and electrostatic attraction, transform into magnetic chain clusters, and then further form three-dimensional network magnetic aggregates that can capture free kaolin particles and other chain clusters. Particle image velocimetry confirmed the formation of eddy current of magnetic flocs and experienced three stages acceleration, stabilization, and deceleration.
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: Purificación del Agua / Quitosano Idioma: En Revista: J Environ Sci (China) Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
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: Purificación del Agua / Quitosano Idioma: En Revista: J Environ Sci (China) Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos