Biosorpsi Ion Cr(III) pada Biosorben Rumput Laut Eucheuma Spinosum
ABSTRACT: Studies on
biosorption and desorption of Cr(III) on algae (Eucheuma spinosum) adsorbent
have been carried out. These studies included determination of biosorbent
acidity, optimum pH, contact time of biosorption, isoterm and biosorption
capacity, and mechanisms of interaction between Cr(III) and algae (E. spinosum)
biosorben. Mechanisms of interaction were evaluated by sequential desorption of
Cr(III) on algae biosorben by using aquadest, 1 M HCl and 0.05 M Na2EDTA. The
result showed that the total acidity of algae biosorbent was 4.15 ± 0.33
mmol/g, the optimum pH was 3, and the optimum contact time was 20 min.
Biosorption capacity of algae (E. spinosum) toward chromium (III) was 57.33
mg/g. The highest desorption of Cr(III) achieved when 1 M HCl was used, i.e.
51,01%, wheareas desorptions using aquadest and 0.05 M Na2EDTA were relatively
low, i.e. 2.07% and 2.38% respectively. This result indicates that the main
interaction mechanism of Cr(III) on algae was electrostatic attraction.
Penulis: I Wayan Sudiarta, Ni
Putu Diantariani
Kode Jurnal: jpkimiadd080105
