L, S., M. L., and N. I. A. “DETERMINATION OF ADSORPTION KINETICS OF COCONUT HUSK ADSORBENT FOR HEAVY METALS REMOVAL USING LANGMUIR AND FREUNDLICH ISOTHERM EXPRESSIONS”. International Journal of Research -GRANTHAALAYAH, vol. 6, no. 10, Oct. 2018, pp. 87-94, doi:10.29121/granthaalayah.v6.i10.2018.1165.