Removal of beryllium (Be<sup>2+</sup>) from aqueous solutions by chelating resins
Kitapta bölümler · 2022
Yazarlar: Buse Nur Tunçel, Begüm Göksoy, Ozan Ali Dündar, Özgür ARAR
Advances in Chemistry Research, Nova Science Publishers, Inc., Uluslararası, 2022, ss 281-297, Amerika Birleşik Devletleri
Özet
In this work, a chelating resin containing iminodiacetic acid (Purolite MTS 9300) and aminophosphonic acid (Purolite MTS 9500) with functional groups were used to remove beryllium (Be2+) from aqueous solutions. The effect of resin dose and initial pH of the solution on the removal rate of Be2+ was investigated. The results showed that the removal of Be2+ is pH-dependent and optimal removal is achieved in the range of 3-5. Furthermore, the kinetics of Be2+ removal is faster for aminophosphonate-containing resins than for iminodiacetate-containing resin. Removal reached equilibrium in 90 minutes for iminodiacetic resins and 45 minutes for aminophosphonic acid-containing resin. In addition, the sorption isotherm studies showed that the sorption of Be2+ obeyed the Langmuir isotherm model for both resins. However, the maximum sorption capacity of the iminodiacetic-containing resin was 19.14 mg-Be2+/g and 9.66 mg-Be2+/g for the aminophosphonic acidcontaining resin. Moreover, the thermodynamic parameters showed that the sorption of Be2+ to the resins was spontaneous. The exhausted resins can be regenerated with a 0.5 M H2SO4 solution with more than 99% efficiency.