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Medyan Riza
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Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Pemanfaatan Kulit Jeruk Purut Teraktivasi Sebagai Adsorben Alternatif Untuk Penyerapan Ion Logam Zn (II) Muhammad Furqan Adhi; Rajue Marzyan; Medyan Riza; Farid Mulana
Jurnal Inovasi Ramah Lingkungan Vol 2, No 1 (2021): JURNAL INOVASI RAMAH LINGKUNGAN
Publisher : Universitas Syiah Kuala

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Abstract

Environmental pollution by liquid waste containing Zn heavy metal ions will adversely affect the environment and the health of organism. To reduce the negative impacts required appropriate technology, cheap and effective. In this study used the adsorption method to overcome the negative impact of heavy metal ions Zn. This study aims to make the peel of citrus hystrix D.C as an activated adsorbent to absorb Zn metal ions. Initial treatment of citrus hystrix D.C which has been made into adsorbent is cleansing of dirt and dried in the oven, then soaked with KOH 0.5 M. Then, each citrus hystrix D.C peel is activated by three different activator that is citric acid 1,6 M, acid 1.6 M tartaric acid and 1.6 M. maleic acid. In the adsorption process used variations of Zn concentration of adsorbent metal ions (40, 80, 200, 400 mg / L), optimum contact time (0, 30, 60, 90, 120 , 150, 180 min), 80 rpm stirrer speed, temperature 27ºC and pH 7. The adsorption process procedure that has been carried out, the filtrate of adsorbat will be analyzed using AAS to find out how many Zn metal ions were adsorbed. The result of analysis obtained in this study shows that the most optimum time to conduct Zn metal adsorption process is 120 minutes, with absorption capacity of 33.181 mg / g and efficiency 82.95%. Maleic acid activator 1.6 M is very effective to activate the peel of citrus hystrix D.C.
Pengaruh Konsentrasi Inhibitor Ekstrak Daun Sirsak terhadap Laju Korosi Baja Karbon Ryana Dwi Shafira; Arriza Mulyana; Medyan Riza
Jurnal Inovasi Ramah Lingkungan Vol 3, No 1 (2022): JURNAL INOVASI RAMAH LINGKUNGAN
Publisher : Universitas Syiah Kuala

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Abstract

Corrosion is a degradation of metal because of its reaction with the environment. The use of inhibitors is one of the most effective ways to prevent corrosion. Corrosion inhibitors are substances which when added to a metal can slow down the corrosion rate. Soursop leaf is one of the plants which contains tannin. Utilization of soursop leaf in the industrial world is still rarely done so that it is possible to use the soursop leaf as a natural inhibitor in the corrosion reaction of steel. This research uses socletation extraction method to extract tannins on soursop leaf and use mass reduction method to know the rate of corrosion. The independent variables of this research are the ratio of soursop leaf powder and ethanol-water solvent: 1:99; 2:98; 3:97; 4:96; 5:95 (w/w), long immersion: 5; 10; and 15 days, and corrosive media and inhibitor ratio: 1:0; 1:1; 1:2; and 1:3 (v/v). The result showed that in immersion without inhibitors, the sample has the highest weight loss or the highest corrosion rate.  The result for the immersion with the addition of inhibitor indicates that the soursop leaf extract can reduce the corrosion rate. Inhibitors that has the most effective result to reduce the corrosion rate is the concentration of 5% and contact time of 15 days with the lowest value of 0.0098 mg / cm2 perday at the ratio of corrosive media: inhibitor 1:3. Soursop leaf extract provides the greatest corrosion rate inhibitor with a value of 93.33 obtained at a concentration of 5%, the ratio of corrosive media:inhibitor 1:3 and contact time of 15 days.
Co-Authors Arriza Mulyana Farid Mulana Muhammad Furqan Adhi Rajue Marzyan Ryana Dwi Shafira