Geotechnical cleaning of groundwater using reject of iron ore slime (RIOS)
2021
Sarkar, Santanu | Das, Mayukh | Chakraborty, Pranjal | Sarkar, Chandramouli | Chakarborty, Sudip
Arsenic (As) being present in the groundwater of many regions has significant detrimental effects on the health of the local people. Moreover, in current scenario iron ore mining residues have detrimental effects on the environment besides occupying space. Reject of iron ore slime (RIOS) has high adsorption properties irrespective of temperature and pH. The simulation study has confirmed that As adsorption by RIOS follows Langmuir isotherm and after 24 h residence time more than 90% As can be removed. Moreover, the effect of variation both As and RIOS has been understood. Based on the simulation study, a desired RIOS concentrated slurry was injected into groundwater reservoir for in-situ As removal and after 20 days nearly 90% As was entrapped in RIOS. Thus, the present study ensured that RIOS may be used as an alternative adsorbent for geotechnical cleaning of As from groundwater.
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