Study of the dynamic adsorption and the effect of the presence of different cations and anions on the adsorption of As(V) on GUT-3

This study is aimed at understanding the dynamic adsorption and the effect of the presence of different cations and anions on the adsorption of As(V) on GUT-3 (a new metal-organic framework). The study showed that Zn2+, Ni2+, Cu2+, CO32-, and NO3- promoted the adsorption of As(V) on GUT-3 at all concentrations and Fe3+ and Cr3+ promoted the adsorption only at 0.5 and 2 mmol/L, respectively, and PO43- and SO42- at 0.5 mmol/L. Fe3+, Cr3+, PO43-, and SO42- inhibited the adsorption at other concentrations. And Zn2+, Ni2+, Cu2+, CO32-, and NO3 promote the adsorption of As(V) on GUT-3. Fe3+ and Cr3+ at 0.5, 2 mmol/L promote the adsorption of As(V) on GUT-3. PO43- and SO42- at 0.5 mmol/L promoted the adsorption of As(V) on GUT-3, whereas PO43- and SO42- at other concentrations inhibited the adsorption of As(V) on GUT-3. However, K+, irrespective of the concentration, was seen to inhibit the adsorption of As(V) on GUT-3. The dynamic adsorption study showed that the penetration process of As(V) on GUT-3 was more in line with the bed depth service time (BDST) model. Dynamic adsorption was mainly chemical in nature and was observed to occur on the surface of the adsorbent.

Automated summary

This study investigates the dynamic adsorption and the impact of different cations and anions on the adsorption of As(V) on the new metal-organic framework GUT-3. The presence of certain ions was found to promote or inhibit As(V) adsorption. Dynamic adsorption process is mainly chemical and follows the bed depth service time model.