Abstract
Removal of arsenate (As(V)) ions by adsorption on natural laterite (NL) is investigated in the present study. Both equilibrium and kinetic study over a wide range of operating conditions are tested to evaluate the effectiveness of NL to remove As(V) from water. In the batch study, the effects of adsorbent dose, initial pH, ionic strength of solution, initial arsenate concentration, temperature, and contact time are examined. Batch study reveals that the uptake of arsenate is effective in the pH range of 5.5 to 7.5. The isotherm data is fitted well in the Langmuir isotherm model, and adsorption capacity is found to be 0.565 mg g-1. The effective intraparticle diffusion coefficient of arsenate ions in NL is observed to be in the range of 7.4 to 9.4 × 10-10 cm2 s-1. Continuous column study using a fixed bed is also carried out. The Adams−Bohart model is applied for the predicting breakthrough curve for column study.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
