An empirical kinetic model for calcium removal from calcium impurity-containing saturated boric acid solution by ion exchange technology using Amberlite IR-120 resin
CHEMICAL ENGINEERING JOURNAL, cilt.148, ss.420-424, 2009 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 148
- Basım Tarihi: 2009
- Doi Numarası: 10.1016/j.cej.2008.09.021
- Dergi Adı: CHEMICAL ENGINEERING JOURNAL
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.420-424
- Anahtar Kelimeler: Boric acid, Waste minimization, Calcium removal, Ion exchange, Empirical model, BORON-CONTAINING WASTEWATERS, AQUEOUS-SOLUTION, ELOVICH EQUATION, HEAVY-METALS, ADSORPTION, SORPTION, BATCH, WATER, RECOVERY
- Atatürk Üniversitesi Adresli: Evet
Özet
In this study, the use of Amberlite IR-120, a strong acidic cation exchange resin. was investigated to remove calcium impurity from saturated boric acid solutions. Calcium impurity arised from high calcium content of colemanite ore is a very important problem as it increases impurity on the boric acid crystals. Ion exchange experiments were carried out in batch mode as a function of solution pH. resin-to-solution ratio, temperature, and resin contact time. Optimum operation conditions were determined as pH 1.5, resin-to-solution ratio 6.174 g/250 mL, temperature 303 (K), contact time 20 min and, in those conditions maximum calcium removal was about 99%. Also, data calculated by a mass balance equation were employed with the pseudo-first-order and the pseudo-second-order equations. It was determined that the pseudo-second-order equation was the best fitting kinetic equation with a correlation range of 0.991-1. Furthermore, an empirical kinetic model was developed to predict operational conditions of the batch process in the following form; t/q(t), = 6.1452 x (S/L)(0.8903) x [H(+)](-0.00094) x exp(-31.2181/T) x [C(0)](-0.7319) x t(0.9567). (c) 2008 Elsevier B.V. All rights reserved.