PENYERAPAN ION Cd (II) DAN Zn (II) DALAM AIR LIMBAH MENGGUNAKAN KULIT JENGKOL (Pithecellobium jiringa Prain.)
Abstract: The sorption ability
of Pithecellobium jiringa Prain. shell
has been investigated for removal Cd(II)
and Zn(II) ions. Effect of pH, initial concentration of metal solution, contact
time, biosorbent dosage, and agitation rate have been studied for investigating
optimal conditions of biosorption process based on batch experiment. The
optimal condition for removal Cd(II) ion was achieved at pH 5 within 15 minutes
and 0,1 g of biosorbent dosage at agitation rate of 150 rpm in initial
concentration of 3000 mg/L. Meanwhile the optimal condition for sorption of
Zn(II) was achieved at pH 4 within 90 minutes and 0,1 g of biosorbent dosage at
agitation rate of 100 rpm in initial concentration 2000 mg/L. The optimal
conditions have been applied in sample of Batang Arau River of Padang city and removal efficiency
of metals achieved for Cd(II) and Zn(II) ions were 94,29 % and 74,37%,
respectively with metal uptake 0,3922 mg/g and 0,1144 mg/g, respectively. The analysis of FT-IR spectra indicated the
possible functional groups involved in sorption process of metals were
hydroxil, carboxyl, sulfonyl. Freundlich and Langmuir isotherm have been
studied and good correlation was obtained from Langmuir isotherm with value ≥
0,976. The maximum capacity of Cd (II) and Zn(II) ions with Pithecellobium
jiringa Prain. shell determined from
Langmuir isotherm were found to be 20,32 mg/g and 16,67 mg/g, respectively.
Penulis: Putri Isnaini,
Rahmiana Zein, dan Edison Munaf
Kode Jurnal: jpkimiadd130196
