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Muh. Yudi

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Author-ID : 2671615

Chemistry

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Pengaruh Konsentrasi Aktivator Asam Klorida (HCL) Terhadap Kapasitas Adsorpsi Arang Aktif Kulit Durian (Durio Zibethinus) pada Zat Warna Methanil Yellow Supiati Supiati; Muh. Yudi; St Chadijah
Al-Kimia Vol 1 No 1 (2013): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Durian’s peel a waste which usually burned, stacked or discarded, which are unfavorable to environment. This condition motivates author to produce value-added products from the durian peel, such as activated carbon, as well as solving some environmental problems. This research aims to know the influence to use variation of concentration of activator HCl whice produces the optimum adsorption capacity from charcoal active of durian’s peel to the substance color of methanil yellow. Active carbon which is used in this research comes from durian’s peel which granular types with standard -100+40 mesh. Carbon is activated by physics in furnace with 400°C heat during 2 hours and is activated by chemistry with submerged of HCI 1M, 2M, 3M, 4M and 5M during 24 hours. The result of this research shows that optimum concentration in HCI 1M with adsorption capacity from charcoal active of durian’s peel is as large as 0,5350 mg/g. Whereas knowing the influence of activator is used tabulation method by statistically, where we can get F Hitung 0,004 is smaller from F Tabel 10,127. It explains that H0 is accepted to reject H1. Therefore, it can conclude that there is not significant influence to use variation of concentration of activator HCl to adsorption capacity of charcoal active from durian’s peel in substance methanil yellow.

Kinetika Hidrolisis Pati Biji Nangka (Artocarpus heterophyllus) Menggunakan Katalisator Asam Klorida (HCl) Sri Endang; Muh. Yudi; Asri Saleh
Al-Kimia Vol 2 No 1 (2014): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

The research of kinetic hydrolysis from the starch of jackfruit seed (Artocarpus heterophyllus) used clorid acid catalyst (HCl) aims to know the influence of variation of concentration HCl catalyst which give the maximum result of hydrolysis of the starch of jackfruit seed, determining the optimum concentration of HCl catalyst that produces the maximum value of the reaction rate constants, and determine the value of the reaction rate constant of hydrolysis the starch of jackfruit seed using catalyst. The method of this research has done in two stages that are the determination of the optimum catalyst concentration of HCl hydrolysis reaction of the starch of jackfruit seed using various concentration of catalyst HCl 0,5 M; 1,0 M; 1,5 M; 2,0 M and 2,5 M at the optimum temperature and stirring time (90oC during 70 minutes). Hydrolysis followed by neutralization process using sodium hydroxide solution and evaporated to get the form of glucose concentrated, that glucose is analyzed by qualitative and quantitative with Benedict experiment and fenol sulphate acid method, based on maximum degree of glucose which is gotten from the result of hydrolysis the starch of jackfruit seed variation concentration oh HCl is in HCl 1,5 M concentration with degree of glucose (% weight) is 7,54% with percentage of starch conversion is 83,21%. Second step is determining the value of hydrolysis constant rate reaction which use time variation (30, 40,50, 60 and 70) minutes in 70 minutes optimum operation condition, 90oC te mperature and concentration catalyst of HCl 1,5 M. Based on statistic calculation date of ANOVA is gained F hitung < F tabel so Ho receive and reject HI which shows that there is not influence catalyst variation concentration of HCl to the result of hydrolysis the starch of jackfruit seed which is gained. The result of the research shows that hydrolysis of kinetic of the starch of jackfruit seeduse HCl catalyst is reaction of the first apparent orde with value of the reaction constant rate k = 0,0216 minutes-1.

Pengaruh Konsentrasi Aktivator Asam Klorida (HCl) Terhadap Kapasitas Adsorpsi Arang Aktif Kulit Buah Kakao (Theobroma cacao. L) Pada Zat Warna Methanil Yellow Sitti Arung; Muh. Yudi; St Chadijah
Al-Kimia Vol 2 No 1 (2014): June
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Cocoa’s peel is a waste which usually burned, stacked or disintegrated and can make pollution to the environment. This condition motivates the researcher to produce the value-added product from the cocoa’s peel, such as activated carbon and as well as it can solve the environmental problems. This research aims to know the influence to use variation of concentration of activator HCl whice produces the optimum adsorption capacity from charcoal active of cocoa’s peel to the substance color of methanil yellow. Active carbon which is used in this research comes from cocoa’s peel which granular types with standard -100+40 mesh. Carbon is activated by physics in furnace with 600°C heat during 2 hours and is activated by chemistry with submerged of HCI 1M, 2M, 3M, 4M and 5M during 24 hours. The result of this research shows that optimum concentration in HCI 1M with adsorption capacity from charcoal active of cocoa’s peel is as large as 1,572 mg/g. Whereas knowing the influence of activator is used tabulation method by statistically, where we can get FHitung 0,003 is smaller from FTabel 10,127. It explains that H0 is accepted to reject H1. Therefore, it can conclude that there is not significant influence to use variation of concentration of activator HCl to adsorption capacity of charcoal active from cocoa’s peel in substance methanil yellow.

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