Indium-Based Coordination Polymers for Congo Red Adsorption:Applications and Mechanism Study
The removal of organic dyes from wastewater has been of much interest due to wastewater containing organic dyes causing serious environmental pollution problems.In this study,two In(Ⅲ)-based coordination polymers materials have been constructed via direct precipitation method and solvothermal synthesis using the 1,2,4,5-benzenetetracarboxylic acid(H4betc)and Indium nitrate tetrahydrate,namely,In-CP#1 and In-CP#2.The compounds were characterized by SEM,FTIR,XRD,the surface area and TGA.Additionally,the compounds were used as adsorbents to selectively adsorb Congo red(CR)in aqueous solution.The adsorption effects of adsorption time and CR initial concentration on the adsorption process were in-vestigated.Furthermore,the adsorption mechanism study on the adsorption process was conducted.The results showed that the adsorption mechanism of the adsorbent materials is mainly chemical interaction,and the adsorption processes conforms to pseudo-second-order kinetic,but does not fit the Langmuir monolayer adsorption model.
Indium(Ⅲ)coordination polymer materialswater treatmentadsorptionCongo red
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