Abstract—Efficiency of ion exchange, electro membrane, and electrochemical ion-exchange (EIX) processes on arsenic removal were evaluated in laboratory. Batch studies were performed with chloride (IRA410) as well as hydroxyl (modified IRA410) exchangeable forms of anion exchange resins (AER), whereas, column study was done with only hydroxyl exchangeable AER to evaluate its performance on arsenic removal. A plate and frame type electrolytic cell with ruthenium dioxide coated titanium plates (RuO2/Ti) as anode, and stainless steel plates as cathode, was fabricated to do experiment to evaluate the performance on arsenic removal by electro membrane as well as EIX processes. Though, As(V) removal was significant during batch kinetic study, As(III) removal was poor by both the AER. Breakthrough curves were developed by passing As(V) contaminated water at a flow rate of 5 ml/min through 3 different bed depths of 5 cm, 7.5 cm, and 10 cm of modified IRA410 columns having 1 cm internal diameter. The columns could efficiently remove from 500 μg/l of As(V) contaminated water to below 10 μg/l. In electro membrane process, effects of electrolyte concentration, effects of applied voltage, and initial concentration of As(V) were evaluated. EIX process was found to be inefficient in removing As(V) from contaminated water.
Index Terms—Arsenic, ion-exchange, EIX, BDST.
Pandu Ranga Rao, Nzangthung Ngullie, and Pranab Kumar Ghosh are with the Department of Civil Engineering, Indian Institute of Technology Guwahati, India-781039 (e-mail: email@example.com, firstname.lastname@example.org, email@example.com).
A. K. Golder is with the Department of Chemical Engineering, Indian Institute of Technology Guwahati, India-781039 (e-mail: firstname.lastname@example.org).
Cite:Pandu Ranga Rao, Nzanthung Ngullie, A. K. Golder, and Pranab Kumar Ghosh, "Arsenic Removal from Contaminated Water by Various Physicochemical Processes," International Journal of Environmental Science and Development vol. 6, no. 5, pp. 357-362, 2015.