Removal of rhodamine B and Cr(VI) from aqueous solutions by a polyoxometalate adsorbent
作者： Feng Li , Yong Chen , Haimei Huang , Wei Cao , Taohai Li
DOI: 10.1016/J.CHERD.2015.05.030
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摘要: Abstract A polyoxometalate framework [Ni(bipy) 2 ] (HPW 12 O 40 ) was synthesized via an efficient chemical coprecipitation method. The adsorption ability investigated by removing rhodamine B from aqueous solutions. extensively explored varying the experimental conditions such as contact time, pH, temperature, adsorbent dose, initial dye concentration and reusability. Intra-particle diffusion model employed to determine rate limiting step of process. Langmuir isotherm found suitable for system, process obeys pseudo-second-order kinetics. Moreover, this can be reused almost without any loss capacity. It also has a multiplex capability well satisfactory tolerance against changes in pH/dye concentration. able remove Cr(VI) ions solution.
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