|Title||Visual MINTEQ simulation for prediction of the adsorption of arsenic on ferrihydrite|
|Author(s)||Irunde, R.; Bhattacharya, P.; Ijumulana, J.; Ligate, F.J.; Ahmad, A.; Mtalo, F.; Mtamba, J.|
|Source||In: Environmental Arsenic in a ChangingWorld - 7th International Congress and Exhibition Arsenic in the Environment, 2018. - CRC Press/Balkema (Environmental Arsenic in a ChangingWorld - 7th International Congress and Exhibition Arsenic in the Environment, 2018 ) - ISBN 9781138486096 - p. 435 - 436.|
|Event||7th International Congress and Exhibition Arsenic in the Environment, 2018, Beijing, 2018-07-01/2018-07-06|
|Publication type||Contribution in proceedings|
The surface of ferrihydrite adsorbs arsenic (As) effectively. In this investigation, the As laced water samples collected from Geita and Mara regions within the Lake Victoria Basin (LVB) under DAFWAT project were simulated onVisual MINTEQ 3.1 software to determine the amount of ferrihydrite required to adsorb a given amount of As from water. Model simulations show that As concentration of ≤1 mM can be completely adsorbed by 4 g L−1 ferrihydrite. Previous studies show that the lower pH 4 to 4.5 influences adsorption, while it decreases as pH increases as well as when As concentration increases. The increase of adsorbent dose to 4 g L−1 has shown to improve As(V) adsorption on pH 5 to 8 at 100%. The amount of adsorbent can now be used for laboratory adsorption experiments by using iron-based materials or commercial ferrihydrite.