Abstract
Adsorption of taurine on S‐8, NKA2 and Amberlite XAD‐1 resins was measured with respect to time and the results indicated that equilibrium was reached in 50 min. The adsorption isotherms of taurine on D4006, AB‐8, S‐8, NKA2 were recorded and compared with those using Amberlite XAD‐1, XAD‐3, XAD‐6 and XAD‐7 at 28 °C. For an aqueous concentration range of 0–100 mg g^−1^, each isotherm could be represented as a straight line. S‐8 and XAD‐1 resins had the highest solid/liquid distribution coefficients of 0.92 and 0.9. Since the locally produced S‐8 resin is less expensive than XAD‐1 resin, it was selected for further studies with adsorption isotherms being measured over the aqueous concentration range of 0–160 mg g^−1^. These experimental results could be fitted by the Langmuir equation. The effects of pH, salting‐out and temperature on the adsorption were studied with the results showing that the influence of temperature was the most important. A temperature‐swing adsorption process was then tested to separate taurine from aqueous solutions and gave a overall yield >90% when taurine was adsorbed at 28 °C and eluted by deionized water at 70 °C.
© 2001 Society of Chemical Industry