Chemical
https://repository.unri.ac.id/handle/123456789/93
2024-03-29T14:30:12ZPOTENSI BIOSORBEN KULIT SINGKONG (Manihot esculenta Crantz) TERAKTIVASI NaOH DALAM MENINGKATKAN pH DAN KUALITAS FISIK AIR GAMBUT
https://repository.unri.ac.id/handle/123456789/11368
POTENSI BIOSORBEN KULIT SINGKONG (Manihot esculenta Crantz) TERAKTIVASI NaOH DALAM MENINGKATKAN pH DAN KUALITAS FISIK AIR GAMBUT
Patuanjaya, Yohansen
This research aims to analyze the effect of the cassava peel biosorbent powder
activation process on the characteristics of the biosorbent powder, as well as
determine the optimum contact time and optimum dose of biosorbent powder in
increasing the pH and physical quality (color, odor, TSS and TDS) of peat water.
The cassava peel biosorbent powder in this study was made through the process of
drying the washed cassava peel, then grinding it to a size that passed at 100 mesh
and was retained at 200 mesh. Biosorbent powder was activated using 0.4 N NaOH
solution with a ratio of 1:10 (w/v). The functional groups of cassava peel biosorbent
powder were analyzed using FTIR, while the surface morphology and elemental
composition of cassava peel biosorbent powder were analyzed using SEM-EDS.
Determination of the optimum contact time was carried out with variations in
contact time of 30, 60 and 90 minutes. After obtaining the optimum contact time,
then proceed with determining the optimum dose of biosorbent powder with a dose
variation of 0.05; 0.10; and 0.15 g. Based on research, the optimum conditions for
biosorbent powder after activation are a contact time of 60 minutes and a dose of
0.10 g of biosorbent powder. These optimum conditions have not been able to
improve the color and odor of peat water, but have succeeded in improving pH,
TSS and TDS when compared to Government Regulation No. 22 of 2021
concerning Implementation of Environmental Protection and Management.
2023-11-01T00:00:00ZPENGARUH BERAT KATALIS, WAKTU DAN SUHU REAKSI PADA PRODUKSI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO-SiO2 3% DARI LIMBAH CANGKANG KERANG DARAH DAN SABUT KELAPA
https://repository.unri.ac.id/handle/123456789/11367
PENGARUH BERAT KATALIS, WAKTU DAN SUHU REAKSI PADA PRODUKSI BIODIESEL MENGGUNAKAN KATALIS HETEROGEN CaO-SiO2 3% DARI LIMBAH CANGKANG KERANG DARAH DAN SABUT KELAPA
Risma, Yesika Ayu
This research aims to synthesize biodiesel using a CaO catalyst from blood cockle shells
impregnated with SiO2 from coconut fiber at a concentration of 3% w/w. The resulting
catalyst was characterized using the Brunauer Emmett Teller (BET) method showing that
the surface area of the 3% CaO-SiO2 catalyst had a higher area compared to CaO without
modification. Scanning electron microscopy-energy dispersive x-ray spectroscopy (SEMEDX)
had a rough surface morphology. and agglomerate and the main elemental
composition of the 3% CaO-SiO2 catalyst is Ca, Si and O, and the basicity test of the 3%
CaO-SiO2 catalyst has lower basicity compared to CaO. Biodiesel production is carried
out by varying catalyst weight, temperature and reaction time with optimization using the
Response Surace Methodology (RSM) design. Characterization of biodiesel produced
from a 3% CaO-SiO2 catalyst has water content, specific gravity, viscosity and carbon
residue which generally meets the quality requirements of SNI 7182-2015, except for the
acid number.
2023-11-01T00:00:00ZSERBUK KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) BERLAPIS ASAM HUMAT DARI AIR GAMBUT UNTUK ADSORPSI ION LOGAM TIMBAL(II)
https://repository.unri.ac.id/handle/123456789/11363
SERBUK KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) BERLAPIS ASAM HUMAT DARI AIR GAMBUT UNTUK ADSORPSI ION LOGAM TIMBAL(II)
Windari, Sri Artika
This research aims to determine the efficiency and optimum adsorption capacity for
variations in pH, contact time, and adsorbate concentration of white jabon bark powder
in the adsorption of lead (II) ions. White jabon bark powder was activated using NaOH
in a ratio of 1:0, 1:1, 1:2, 1:3, 1:4, and 1:5 (w/w), which was characterized using iodine
adsorption capacity and methylene blue adsorption capacity. The powder that is
activated with the optimum NaOH ratio is then coated with humic acid from peat water.
White jabon bark powder was optimized for pH parameters, contact time, and adsorbate
concentration. The results of the characterization of determining the optimum NaOH
ratio in this study showed that the iodine adsorption capacity in the ratio 1:3 (w/w) was
294.8037 mg/g and the methylene blue adsorption capacity was 21.3484 mg/g with a
surface area of 79.1540 m2/g. The adsorption results obtained showed that the optimum
conditions for Jabon bark powder were a pH variation of 4, a contact time of 30
minutes, and an adsorbate concentration of 140 mg/L with a biosorption efficiency of
99.47% and a biosorption capacity of 6.6043 mg/g. Based on the FTIR results, there are
C-H, C-O, C-N, C=C aromatic, C-H stretching, and O-H functional groups. SEM-EDS
results showed that jabon bark powder contained the elements C, O, Ca, K, Mg, Na, and
Cl, and there were many impurities covering the pores of the powder. The powder
surface looks cleaner and more open after activation.
2023-11-01T00:00:00ZBIOSORBEN ARANG AKTIF KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) UNTUK PENJERAPAN ION LOGAM TIMBAL(II)
https://repository.unri.ac.id/handle/123456789/11362
BIOSORBEN ARANG AKTIF KULIT KAYU JABON PUTIH (Anthocephalus cadamba Miq.) UNTUK PENJERAPAN ION LOGAM TIMBAL(II)
Salma, Sherly Febrisa
White jabon bark (Anthocephalus cadamba Miq.) has a high chemical content of
cellulose and lignin so it has the potential to be used as an adsorbent to adsorb lead(II)
metal ions. This research aims to determine the efficiency and adsorption capacity of
white Jabon bark activated charcoal in adsorbing lead(II) metal ions, determine the
kinetic model and adsorption isotherm. White jabon bark charcoal is made using a
carbonization process at a temperature of 800℃ for 90 minutes and activated with a
NaOH solution with varying ratios of charcoal and activator 1:1 ;1:2 ;1:3; 1:4 and 1:5
(w/ b). Characterization of activated charcoal refers to SNI 06-3730-1995. The
functional groups of activated charcoal were analyzed using FTIR, the morphology of
activated charcoal and the elemental composition of activated charcoal were analyzed
using SEM-EDS. The concentration of lead(II) metal ions was analyzed using AAS.
The charcoal yield obtained was 15.7247%. The results of the activated charcoal
characterization showed that the water content was 1.23%, the ash content was 4.29%,
the iodine adsorption capacity was 647,5453 mg/g and the methylene blue adsorption
capacity was 24.3776 mg/g with a surface area of 90.3853 m2g. FTIR results show that
the functional groups of white jabon bark activated charcoal are aromatic C=C, C=C
stretching, C-H stretching aliphatic, C≡C, N-H and O-Pb. The best adsorption
conditions were obtained at pH 6, contact time 40 minutes and adsorbate concentration
140 mg/L with an efficiency of 99.872% and an adsorption capacity of 6.623 mg/g.
Based on the SEM-EDS test results, it is known that activated charcoal contains the
elements C, O, Ca and P.
2023-11-01T00:00:00Z