TY  - THES
ID  - eprints65526
UR  - http://digilib.unila.ac.id/65526/
A1  - NADYA SYARIFATUL FAJRIYAH , 2027011010 
Y1  - 2022/08/06/
N2  -  
Pada penelitian ini telah dilakukan modifikasi karbon yang terbuat dari cangkang
buah karet melalui pelapisan magnetit dan silanisasi menggunakan
triethoxyphenylsilane (TEPS). Karbon magnetit (KM), karbon silan (KS) dan
karbon magnetit silan (KMS) yang diperoleh dari proses modifikasi digunakan
untuk menghilangkan zat warna crystal violet (CV) dan herbisida paraquat (PQ). 
Karakterisasi KM, KS, dan KMS menggunakan spektroskopi fourier transform
infrared (FTIR), X-ray diffraction (XRD) dan scanning electron microscopyenergy

dispersive X-ray (SEM-EDX) menunjukkan bahwa karbon berhasil
dimodifikasi oleh magnetit dan TEPS. Beberapa parameter yang berpengaruh
terhadap proses adsorpsi diujikan dan didapatkan hasil optimum antara lain dosis
adsorben 0,1 g, pH 10, dan waktu kontak 15 menit pada CV. Hasil optimum yang
diperoleh pada PQ  antara lain dosis adsorben 0,2 g, pH 9, dan waktu kontak 120
menit. Hasil kapasitas adsorpsi tertinggi yang diperoleh pada KM, KS dan KMS
terhadap CV dan PQ masing-masing adalah 47,01, 54,63 dan 55,06 mg/g serta
24,37, 24,33 dan 24,39 mg/g. Kinetika adsorpsi terhadap CV dan PQ cenderung
mengikuti kinetika pseudo orde dua. Isoterm adsorpsi zat warna CV cenderung
mengikuti pola isoterm Freundlich dimana menunjukkan bahwa proses adsorpsi
yang terjadi bersifat multilayer. Isoterm adsorpsi PQ cenderung mengikuti pola
isoterm Langmuir yang menunjukkan bahwa proses adsorpsi yang terjadi bersifat
monolayer. Mekanisme KMS terhadap CV didominasi oleh interaksi fisika dan
pertukaran ion, sedangkan terhadap PQ didominasi oleh ikatan kovalen koordinasi
dan ikatan hidrogen. Penggunaan ulang adsorben KMS terhadap CV dan PQ cukup
efektif sebanyak 3 kali pengulangan dengan % adsorpsi ?70%.  
 
Kata kunci : Adsorpsi, kristal violet, paraquat, karbon magnetit silan, cangkang
buah karet

 
In this study, carbon modification from rubber fruit shells was carried out through
magnetite coating and silanization using triethoxyphenylsilane (TEPS). Carbon
magnetite (KM), carbon silane (KS), and carbon magnetite silane (KMS) obtained
from the modification process were used to remove crystal violet dye (CV) and
paraquat herbicide (PQ). Characterization of KM, KS, and KMS using fourier
transform infrared (FTIR), X-ray diffraction (XRD) spectroscopy and scanning
electron microscopy-energy dispersive X-ray (SEM-EDX) showed that carbon was
successfully controlled by magnetite and TEPS. Several parameters that affect the
adsorption process were tested and the optimum results were obtained, including
the adsorbent dose of 0.1 g, pH 10, and a contact time of 15 minutes at CV. The
optimum results obtained at PQ include an adsorbent dose of 0.2 g, pH 9, and a
contact time of 120 minutes. The results of the highest adsorption capacity obtained
on KM, KS, and KMS on CV and PQ were 47.01, 54.63, and 55.06 mg/g and 24.37,
24.33, and 24.39 mg/g, respectively. Adsorption kinetics with respect to CV and
PQ tend to follow pseudo second order kinetics. The CV dye adsorption isotherm
tends to follow the Freundlich isotherm pattern which indicates that the adsorption
process that occurs is multilayer. The PQ adsorption isotherm tends to follow the
Langmuir isotherm pattern which indicates that the adsorption process that occurs
is monolayer. The mechanism of KMS to CV is dominated by physical interactions
and ion exchange, while to PQ is dominated by covalent coordination bonds and
hydrogen bonds. The reuse of KMS adsorbent on CV and PQ was quite effective
for 3 repetitions with % adsorption ? 70%.

Key words: Adsorption, crystal violet, paraquat, carbon magnetite silane, rubber 
fruit shell
 
PB  - UNIVERSITAS LAMPUNG
M1  - masters
TI  - 
 
FUNGSIONALISASI KARBON TERMODIFIKASI MAGNETIT (Fe
3
)
DAN SILAN (Triethoxyphenylsilane) DARI CANGKANG BUAH KARET 
(Hevea brasiliensis) SEBAGAI ADSORBEN ZAT WARNA CRYSTAL
VIOLET DAN HERBISIDA PARAQUAT 
O
4
AV  - restricted
ER  -