Arsenic (III) Removal from Contaminated Water using Low-Cost Adsorbents: A Batch Adsorption Study

Year 2016, Volume: 12 Issue: 3, 437 - 448, 26.12.2016

Şerif Targan

Abstract

Natural materials named as waste
and lime (CaO) has been used as a potential low-cost adsorbent for the removal
of As (III) from contaminated water in batch studies. Results showed that
Corncobs, pine cones and olive pomas didn’t effectively absorb As (III). The
absorbtion capacity of lime (CaO) was 4.986 mg As (III) / g lime (CaO)/ hour, at
the temperature of 20 o C and pH of 12.3. An adsorbent dose of 0.5 g could
effectively remove 99.48% of As (III) from initial concentration of 50 mg L-1
within 1 h. As (III) removal depended on variations in pH and temperature. High
adsorption of As (III) was observed at the pH of  12.3 at 20°C. The adsorption equilibrium data
could be fit to Langmuir or Freundlich isotherms with similar accuracy. The
Langmuir isotherm provided the best correlation for the adsorption of As (III)
onto the lime (CaO). The maximum capacity of adsorption was 4.986 mg g -1 at
0.5g fixed adsorption dosage. The results suggest that lime (CaO) is a
potential adsorbent for effective removal of As (III) ions from contaminated
water.

Keywords

Adsorption, arsenic, batch studies, contaminated water, lime (CaO)

References

• Salim, Md., Munekage,Y.and Naing, K. M., Arsenic(III) Removal from Contaminated Water using Silica Ceramic:A Batch Adsorption Study. Journal of Applied Sciences 7 (16): (2007) 2314-2320.