TRANSESTERIFIKASI MINYAK BIJI KARET (Hevea brasiliensis) MENGGUNAKAN KATALIS HETEROGEN CANGKANG KEPITING LIMBAH SEAFOOD  TERMODIFIKASI K2O

Astuti, Niken; Simpen, I Nengah; Suarsa, I Wayan

doi:10.24843/jchem.2019.v13.i01.p01

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Kulit udang dapat digunakan sebagai kitosan karena kandungan protein pada kulit udang berkisar antara 25-40%, kalsium karbonat berkisar antara 45-50%, serta kitin berkisar antara 15-20%. Kandungan kulit udang berbeda tergantung jenis udang dan tempat hidupnya (Puspawati & Simpen, 2010).…”

Section: Pendahuluanunclassified

Efektivitas Adsorben Kitosan - Natrium Tripolifosfat dalam Menurunkan Konsentrasi Fe dan Mn pada Air Sumur

Wibowo,

Firra Rosariawari

2023

INSOLOGI: Jurnal Sains dan Teknologi

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In general, well water or ground water often contains iron (Fe) and manganese (Mn) ions in it. One of the effective water treatment processes to remove heavy metals is adsorption. Natural adsorbents such as chitosan can be effective adsorbents used to reduce heavy metal concentrations in the environment. One of the weaknesses of chitosan is the strength of the mechanical structure and low stability. Therefore, crosslinking modifications were carried out to improve the mechanical structure and reduce solubility. This study aims to determine the effect of sodium tripolyphosphate on the process of making chitosan shrimp shell-sodium tripolyphosphate adsorbent and to determine the optimum conditions of the variation of the adsorbent and the mass used. The research variables used were the sodium-tripolyphosphate concentration of 0.25%; 0.50%; and 1.00%, the mass of the adsorbent in the column was 5 grams and 7.5 grams, and the sampling times were 20 minutes, 40 minutes, 60 minutes, 80 minutes, 100 minutes, 120 minutes, 140 minutes and 160 minutes. The results showed that the 1% chitosan-sodium tripolyphosphate adsorbent with a mass of 7.5 grams was the most optimal in reducing the content of Fe by 92% and Mn by 93%.

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Section: Pendahuluanunclassified

Efektivitas Adsorben Kitosan - Natrium Tripolifosfat dalam Menurunkan Konsentrasi Fe dan Mn pada Air Sumur

Wibowo,

Firra Rosariawari

2023

INSOLOGI: Jurnal Sains dan Teknologi

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“…Deproteinasi menggunakan basa NaOH (Masindi & Herdyastuti, 2017). Proses pembuatan kitosan dari demineralisasi dengan HCl 1,5 M, deproteinasi dengan NaOH 3,5 %, dan deasetilasi dengan NaOH 60% (Puspawati & Simpen, 2010).…”

Section: Pembahasan 1 Pembuatan Chitooligosakaridaunclassified

Effect of Chitooligosaccharide Characteristics from Several Types of Shells on Prebiotic Activity : A Brief Review

Patrisiya,

Oktavia,

Zhorif

et al. 2023

jtfat

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Seafood is one of the foods favored by the community and has waste that is not used properly, such as shells. The component contained in the highest shell is chitin, this chitin content can be processed into chitosan. Chitosan is obtained from a process, namely enzymatic and chemical hydrolysis and this process can also be used to obtain chitooligosaccharides. Chitooligosaccharides are complex compounds of the glycoprotein group which have -1,4 glucosamine bonds. Chitooligosaccharides can act as prebiotics. Recently, there has been a lot of research on the characteristics and prebiotic activity of chitooligosaccharides. However, there is a lack of information regarding the relationship between the characteristics and prebiotic activity of chitooligosaccharides mainly from different sources of chitooligosaccharides. Therefore, the aim of this review is to summarize and collect viewpoints regarding the relationship of characteristics with prebiotic activity. The characteristics of chitosan of each type of shell have differences, the main parameter is the degree of deacetylation. The high degree of deacetylation and yield can affect the yield on the characteristics of the chitooligosaccharides produced. Thus, the higher the degree of deacetylation of chitosan, the higher the degree of deacetylation of chitooligosaccharides, so that it can show high prebiotic activity because probiotic bacteria can grow well. Accordingly, this summary can contribute to explaining a comprehensive review of the characteristics of chitooligosaccharides on the prebiotic activity of underutilized and safe materials for consumption.

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Optimizing Reaction Conditions of Biodiesel Production From Waste Cooking Oil Using Green Solid Catalyst

Simpen

Negara

Jayanto

2020

Int. J. Eng. Tech. Mgmt. Res.

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Biodiesel production from waste cooking oil in two steps reaction of esterification and transesterification is low efficient, due to twice methanol consumption and need more reaction time. Optimizing reaction conditions of CaO as a matrix of solid catalyst prepared from crab shell (green CaO) and modified by K2O/TiO2 for converting waste cooking oil to biodiesel have been carried out. Catalytic process of waste cooking oil to biodiesel took place in one step reaction of esterification and transesterification. The research result showed that optimum conditions in its one step reaction such as methanol to oil molar ratio was 9:1, amount of CaO/K2O-TiO2 catalyst to oil was 5% and reaction time of 60 minutes with biodiesel yield was 88.24%. Physical and chemical properties of biodiesel which produced from one step reaction of esterification and transesterification of waste cooking oil were suitable with Indonesian National Standard (SNI-04-7182-2006) namely density at 40oC of 850 kg/m3, kinematic viscosity at 40oC of 3.32 cSt, water content of 0.046%, iodine number of 59.25 g I2/100g and acid value of 0.29 mg KOH/g. Gas chromatography-mass spectrometry (GC-MS) analysis of biodiesel formed fatty acid methyl esters from conversion of waste cooking oil.

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TRANSESTERIFIKASI MINYAK BIJI KARET (Hevea brasiliensis) MENGGUNAKAN KATALIS HETEROGEN CANGKANG KEPITING LIMBAH SEAFOOD TERMODIFIKASI K2O

Cited by 3 publications

References 1 publication

Efektivitas Adsorben Kitosan - Natrium Tripolifosfat dalam Menurunkan Konsentrasi Fe dan Mn pada Air Sumur

Efektivitas Adsorben Kitosan - Natrium Tripolifosfat dalam Menurunkan Konsentrasi Fe dan Mn pada Air Sumur

Effect of Chitooligosaccharide Characteristics from Several Types of Shells on Prebiotic Activity : A Brief Review

Optimizing Reaction Conditions of Biodiesel Production From Waste Cooking Oil Using Green Solid Catalyst

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