Abstract: This paper studies the swelling behaviour of Stereospermum kunthianum plant parts (stem-bark, leaves, root, and seed) at various parameters (kinetics, temperature, pH and ionic strength).The plant parts were prepared by entrapping bio-sorbent with in a polymeric matrix of calcium alginate to produce immobilized bio-sorbents. Result shows that, in water, percentage water uptake increase with increase in time. The water absorbency for the immobilized plant samples in various salt solutions decrease with increasing ionic strength and temperature. The percentage water uptake for the plant parts were 363.6%, 330.6%, 263.6% and 240% for stem-bark, leaves, roots and seed respectively. The plant stem-bark and leaves has the highest percentage water uptake. These observations indicate that these plant samples have potentials in metal ions sorption from aqueous solution because in bioremediation process, the higher the water uptake by the sorbent, the higher metal ions it can remove from the aqueous medium.