@misc{eprints11179,
           month = {Juli},
           title = {SINTESIS MATERIAL HIBRIDA EKSOPOLISAKARIDA SILIKA 
DARI Spirulina sp SEBAGAI ADSORBEN ION Pb(II) DAN Cd(II)  
DALAM LARUTAN
},
          author = {1327011037 WIDYASTUTI},
            year = {2015},
             url = {http://digilib.unila.ac.id/11179/},
        abstract = {In this research, it has been carried out adsorption process of Pb(II) and
Cd(II) ions toward adsorbent of exopolysaccharide (EPS) modified with matrix
silica producing exopolysaccaride silica-hybrid (ESH). The material obtained
from synthesis result was characterized by spectrophotometer infrared (IR) to
identify functional groups and scanning electron microscope-energy dispersive xray

(SEM-EDX) to investigate surface morphology.  Determination of metal ion
concentration was performed by inductively coupled plasma-atomic emission
spectrometry (ICP-AES). Adsorption of Pb(II) and Cd(II) ions with HES is
optimum at pH 7 and consentration at 25 ppm with the capasities adsorption of
99.23 and 82.04 \%, contact time of 15 min and it tends to follow second orde
pseudo kinetic model and Langmuir adsorption isotherm model. 

Keywords: Exopolysaccharide, adsorption, silica-hybrid exopolysaccharide, 
Pb(II) and Cd(II) ions

Pada penelitian ini, telah dilakukan adsorpsi ion Pb(II) dan Cd(II) terhadap
adsorben eksopolisakarida (EPS) yang dimodifikasi dengan matriks silika
menghasilkan hibrida eksopolisakarida-silika (HES). Material hasil sintesis
dikarakterisasi melalui identifikasi gugus fungsional dengan spektrofotometer
inframerah (IR), dan analisis morfologi permukaan dengan scanning electron
microscope-energy dispersive x-ray (SEM-EDX). Analisis kadar ion logam
ditentukan dengan menggunakan inductively coupled plasma-atomic emission
spectrometry (ICP-AES). Adsorpsi ion Pb(II) and Cd(II) oleh HES  optimum pada
pH 7 dan konsentrasi 25 ppm dengan kapasitas adsorpsi masing-masing rata-rata
sebesar 99,23 dan 82,04 \%, waktu interaksi 15 menit serta cenderung mengikuti
model kinetika pseudo orde dua dan model isoterm adsorpsi Langmuir.  
 
Kata Kunci: Eksopolisakarida, adsorpsi, hibrida-silika eksopolisakarida, ion
logam Pb(II), dan Cd(II) }
}