Conclusion

The results of the present investigation show that tamarind pod shells is an effective adsorbent for the removal of methylene blue and amaranth dyes from aqueous solutions, and its adsorption capacity is quite comparable to the other adsorbents reported in literature. Tamarind pod shells were selected for studying adsorption due to its availability in India, as well as to assess the possibility of utilising an agricultural waste for dye removal. The results show that initial dye concentrations, pH and adsorbent dose highly affect the dye uptake capacity of adsorbents. The equilibrium has been analyzed using Freundlich and Langmuir adsorption isotherms. The kinetics of adsorption followed a pseudo first order rate reaction. The calculated isotherm constants were used to compare the adsorptive capacities of adsorbents for dye removal. Thus the use of tamarind pod shells as an adsorbent can be viewed as an effective waste management strategy