Synthesis of Ce/SiO₂ Composited Cross‐Linked Chitosan Flocculation Material and Its Application in Decolorization of Tartrazine Dye

Abstract

Ce/SiO2 composited cross‐linked chitosan (C‐CTS‐S), SiO2 composited cross‐linked chitosan (CTS‐S) and Ce composited cross‐linked chitosan (C‐CTS) flocculation materials are successfully synthesized. The structure along with the decolorization performance and mechanism of treating tartrazine dye wastewater are studied. The results show that the prepared materials are new composites rather than the mixture of the raw agents. Some silica species embed in the matrix or stay on the surface of chitosan (CTS) during the compositing process, and form hydrogen bonds with –NH2 or –OH of CTS. Besides, Ce participate coordination with –NH2 and –OH of CTS. C‐CTS‐S has disorder, unobvious porous and loose sheet‐like structure with smaller particles and positive charge. It shows high performance of tartrazine dye decolorization over a wide range of pH, and produces little sewage sludge after flocculation, providing a favorable condition for later processing. In addition, the possible decolorization mechanism is mainly electroneutralization adsorption and the synergistic effect of deposition netting and bridge aggregation.

Preparation, Characterization and Decolorization Performance of Magnetic Adsorbent Pellets Formed by the Utilization of Electric Flocculation Sludge

“…Coagulation/flocculation is simple to design, easy to manipulate, convenient and energy-efficient technology for treating wastewater. [1][2][3] This method was extensively applied in decolorization of dye wastewater, separate suspended solids from water or reduce certain organic compounds from polluted water. [4][5][6][7][8] Electric flocculation is a promising coagulation/flocculation treatment technology, which is widely adopted at home and abroad.…”

“…Under the people's increasing emphasis on environmental protection, particular attention has been focused on efficiency wastewater treating technology. Coagulation/flocculation is simple to design, easy to manipulate, convenient and energy‐efficient technology for treating wastewater [1–3] . This method was extensively applied in decolorization of dye wastewater, separate suspended solids from water or reduce certain organic compounds from polluted water [4–8] .…”