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Journal : al Kimiya : Jurnal Ilmu Kimia dan Terapan

 1 
A Mixture of Acacia Bark Extract (Acacia mangium Willd) and Potassium Iodide as A Corrosion Inhibitor in Sulfuric Acid Solution Gusti, Diah Riski; Gunawan, Anjelli Putri; Muhammad, Damris; Lestari, Intan
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 10 No. 2 (2023): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v10i2.26187

Abstract

Corrosion is a decrease in the quality of a metal material caused by a reaction with the environment. Corrosion cannot be eliminated, but corrosion can be slowed down in several ways by adding corrosion inhibitors and synergistic effects. Acacia bark extract (Acacia mangium Willd) with the addition of 0.02 M KI has the potential as a corrosion inhibitor for steel because it contains secondary metabolites, so it can provide a synergistic effect and increase the value of inhibition efficiency on steel. This research aimed to analyze the effect of a mixture of acacia bark extracts (Acacia mangium Willd) with the addition of KI on inhibition efficiency corrosion of mild steel in sulfuric acid media. The method used in this study is the method of weight loss, adsorption isotherms, and thermodynamic parameters, which were carried out by varying the concentration of acacia bark extract and the immersion temperature of the steel. To strengthen the research results, characterization was carried out using FTIR and SEM. The results showed that the corrosion rate of mild steel immersed in 0.75 M H2SO4 corrosive medium with the addition of 0.02 M KI increased with increasing immersion temperature. These results are reinforced by the results of FTIR and SEM analysis which show that there is an interaction between mild steel and acacia bark extract (Acacia mangium Willd) and KI 0.02 M. Based on the thermodynamic parameters, the resulting values of ∆Hads, ∆Gads, and ∆Sads show that the adsorption process of acacia bark extract (Acacia mangium Willd) in corrosive medium H2SO4 0.75 M with the addition of 0.02 M KI took place spontaneously, showing the type of physical adsorption, adsorbed stable, the adsorption process was exothermic and the degree of irregularity in the adsorption process. The inhibition efficiency of acacia bark extract (Acacia mangium Willd) with the addition of 0.02 M KI was highest at 60 °C with an extract concentration of 2.5 g/L of 81%. The higher the immersion temperature, the greater the resulting synergistic effect
Adsorption of Remazol Brilliant Blue Dye Using Palm Oil Shell Fly Ash HCl Activated Lestari, Intan; Azira, Ayu; Farid, Faizar
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 10 No. 2 (2023): al Kimiya: Jurnal Ilmu Kimia dan Terapan
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v10i2.29420

Abstract

Remazol Brilliant blue is an azo dye that is widely used in textile dyeing. The most appropriate handling method to be used in overcoming problems caused by textile dye waste is adsorption. Fly ash is an adsorbent that can be used to overcome this problem. Chemical activation was carried out using 1 M HCl solution. Besides that, physical activation was also carried out at 500°C for 1 hour. Research is needed to determine the optimum conditions for fly ash in dye adsorption to produce high adsorption efficiency. XRF characterization showed that palm shell fly ash was dominated by CaO of 71.064% and SiO2 of 15.734%. Characterization using FTIR shows the presence of Si-O groups in Fly ash. To analyze the surface morphology of the fly ash adsorbent, an SEM test was carried out and it was known that the surface morphology of the fly ash adsorbent after chemical and physical activation showed pore formation. Characterization using Surface Area Analyzer showed a surface area of 13.6153 m2/g. optimum absorption conditions at pH 6 with an adsorption capacity of 15.84 mg/g. optimum contact time of 60 minutes with an adsorption capacity of 15.54 mg/g. The optimum adsorbent mass is 0.5 g with an adsorption capacity of 9.54 mg/g and the optimum adsorbent concentration is at 200 ppm with an adsorption capacity of 69.08 mg/g. In this study the adsorption model used is the Freundlich isotherm. Based on the research result, it is known that fly ash is a suitable adsorbent for dye adsorption which is characterized by high color removal efficiency. Further characterization regarding the initial conditions of fly ash is needed as a comparison for fly ash after activation
Co-Authors -, Rahmi - Abdillah Abdillah Ade Adriadi Adinda, Ladiva Agrina Lisma Agrina, Agrina Agustina, Elsi Alben Ambarita Alfernando, Oki Alkatiri, Jufri Amin, Sahrul Anna Rakhmawati Ariana, Febi Arif, M. Ridwan Asep Rohman Asti Rahayu, Martina Azira, Ayu Azril Damris Muhammad Denny Prabawa, Aditya Desy Kurniawati Dhian Eka Wijaya Diah Riski Gusti DIAN LESTARI Edwin Permana Eko Prasetyo Elisma Elisma Erda, Erda Faizar Farid Febriana - Sabrian Fina Audilla, Yessiska Grasella, Lucintania Gunawan, Anjelli Putri Gusti, Diah Rizki Hery Widijanto Hidayat, Dara Shalsa Billah Hidayat, Vikri Idat Muqodas Indra Lasmana Tarigan Indra Lesmana Indriyani Indriyani Iqbal, Anwar Jalius Jalius Kartiko, Frananda Rizki Kastera, Viven Khatoha, Trisqa Laila Lasmana Tarigan, Indra Lenny Marlinda Mahraja, Mahra Manulang, Ermita Meisa Mastutik, Diah Maulana, Rico Gewana Resdy Maya Lestari, Maya Mia Aina Muhaimin, . Muhammad Damris Munifilia Ekasari Naswir, Muhammad Natadiwijaya, Ismail Fikri Natalia, Desfaur Nelson, Nelson Nilasari, Aprillia Niswah, Coirun Nuralam, Deni Nurjamil, Dimas Setya Nurkholik , Dedeng Nurul, Ramdan Ocktavia, Tyzeka Dwi Oktarise Dwina, Dila Pernadi, Niza Lian Pradina, Armitha Dea Prasetio, Muhamad Reza Prasetyo, Widy Puji Rahayu Putra, Adrisma Juanda Qisthi, Zummul Rahayu, Martina Asti Rahmi Rahmi Rajagukguk, Yuli Evrianti Br Riski, Diah Gusti Rizalzi, Dewa Rustikah, Ika Sani K, Fathnur Sari, Avellyn Shintya Satria, Rinaldi Siti Rachmah Sofiani solihah, Nabilatus Sukor, Mohd Zaki Susanto, Nindita Clourisa A Sutrisno, Sutrisno Syahid, Alwi Syauqi, Rif’at Tarmizi, Fadhilah tekmauk, Jitro valerius Tita Rohita Uce Lestari Wahyudi, Abdi Walidatur Rofiah, Yuliana Wardhana, Alexander Tantra Wawan Setiawan Wibowo, Yudha Gusti Yohana, Agnes Vionita Zahar, Wahyudi