Preparation of modified alginate nanoflocculant and adsorbing properties for Pb2+ in wastewater


Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

A novel nano flocculant was prepared through the modification of sodium alginate. In the preparation partially oxidised sodium alginate reacted with triethylenetetramine (TETA) and then reacted with carbon disulfide. The structure of the flocculants was confirmed by elemental analysis, Fourier transform infrared and UV spectrophotometry. The flocculant showed nanoparticle sizes with diameters of 300–350 nm in aqueous solution, and became precipitates after flocculation with Pb2+ ions. The flocculant was employed to adsorb Pb2+ in wastewater, and the influence of flocculant concentration, flocculation temperature, pH, and time on the adsorption properties were investigated. The results showed that adsorption capacity of the flocculant for Pb2+ could reach up to 3.43 mmol g–1, and the removal rate for Pb2+ was over 97%. The adsorption processes corresponded to pseudo second order kinetics and Langmuir isotherm model. The adsorption mechanism involved electrostatic attraction, chemical chelation, netting and sweeping actions.

Sobre autores

Zhenle Tian

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering

Email: nicaihua2000@163.com
República Popular da China, Wuxi, 214122

Liping Zhang

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering

Email: nicaihua2000@163.com
República Popular da China, Wuxi, 214122

Caihua Ni

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering

Autor responsável pela correspondência
Email: nicaihua2000@163.com
República Popular da China, Wuxi, 214122

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML

Declaração de direitos autorais © Pleiades Publishing, Ltd., 2017