Abstract:
Jackfruit seed is a biomass from mature jackfruit processing which has not been
used optimally, because only a part of people who have used it as food. Some
research have been looking for an alternative way to utilize the jackfruit seed, one
of them is the biosorbent. The aim of this study were to optimize the stirring speed
and pH biosorbents of jackfruit seed powder activated by HNO3 modified Caalginate
in absorbing methylene blue dye. Modified jackfruit seed were tested for its
adsorption ability through of pH variations and stirring speed with UV-Vis
characterization to determine the adsorbance of methylene blue. The functional
groups of the modified adsorbent was analyzed using the FTIR instrument. The
surface morphology of the modified adsorbent was analyzed with the SEM
instrument. The results showed that the optimum pH and stirring speed of modified
jackfruit seed in adsorbing methylene blue were 2 and 200 rpm, with an adsorption
efficiency of 85,76%.
