Arsenic Adsorption on Designed Packed Bed Column using Chemically Modified PAN Fiber- A Simulation and Modeling Studies.

Abstract

The efficiency of Chemically modified PAN Fiber (CM-PAN) as an adsorbent for the removal of As(III) from groundwater performed. For polluted water, many techniques have been developed recently to remove arsenic from it, such as chemical precipitation, adsorption, ion exchange, membrane processes, and others. Adsorption is the most often used technique because of its high arsenic performance and low cost. Arsenic (III) was removed from the aqueous solution in this study that use an adsorption technique with chitosan/iron oxide coated PAN Fiber as the adsorbent. In this work, Aspen AdsimV11 was used to create a steady-state model of a fixed bed column in the impact of various process factors. We created a small scale column of 2-cm-diameter and with various bed depths such as 1, 2 & 3cm. By an up-flow rate of 1, 2 & 3 mL/min and large scale column 8-cm-diameter and with various bed depths such as 8cm and by an up-flow rate of 512, 1024 & 1536mL/min. The amount of polluted water that was react towards the breakpoints where adsorption capacity was 91%of As(III) in a concentration of 0.0004004 mol/liter, 88%of As(III) in a concentration of 0.000269 mol/liter and 85% in a concentration of 0.0001335 mol/lit. By increasing starting concentration and bed depth and, total As (III) uptake decreased with increasing flow rate. Bed depth service time (BDST), mass transfer, first order kinetics, and regression analysis of equilibrium data were used to simulate the dynamics of the adsorption process and fit the Langmuir isotherms. The water quality of the treated effluent is adequate for home use, according to the findings. Ion exchange and physiosorption on the adsorbent surface appeared to be the mechanisms for As(III) removal in the CM-PAN column. For arsenic removal from groundwater, this appropriate module would be generate by using these results.