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All Journal Jurnal Teknik Kimia USU CHEESA: Chemical Engineering Research Articles Walisongo Journal of Chemistry Jurnal Teknik Kimia USU Sewagati
Adetya, Nais Pinta
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Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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Optimization of Chromium (VI) Adsorption using Microalgae Biomass (Spirulina sp.) and its Application in Leather Tannery Waste Adetya, Nais Pinta; Arifin, Uma Fadzilia; Anggriyani, Emiliana; Rachmawati, Laili
CHEESA: Chemical Engineering Research Articles Vol 6, No 2 (2023)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v6i2.16315.105-117

Abstract

This study was conducted to examine the adsorption of Cr (VI) metal using Spirulina sp (inactive) biomass and its application in leather tannery wastewater. The treatment was carried out to determine the influence of independent variables on Cr (VI) adsorption with variations in pH, contact time, and metal solution concentration. The values of the solution pH, adsorption time, and concentration of the best metal solution were used to determine the center points of the optimization variables through Response Surface Methodology (RSM). The results showed that based on the FTIR test, macromolecules present in Spirulina sp biomass included amino, carboxylate, and hydroxy groups. The combination of factor variables that produced the optimum response was at pH 3.165, contact time of 66.58 minutes, and Cr (VI) metal ion solution concentration of 22.9 mg/L, resulting in a Cr (VI) adsorption efficiency of 69.66%. The adsorption pattern was included in the Freundlich adsorption isotherm, and the application of Spirulina sp biomass adsorbent to tannery waste reduced the concentration of Cr (VI) from 3.9 g/L to an undetectable level at <1.4 g/L.
Pelatihan Refinishing Kulit Kaku dan Kulit Berjamur di Kelompok Pengrajin Kulit Setyo Rukun, Manding, Kabupaten Bantul, Daerah Istimewa Yogyakarta Rahmawati, Atiqa; Adetya, Nais Pinta; Robbika, Fadzkurisma; Putri, Naimah; Wulandari, Dwi; Abdullah, Sofwan Siddiq; Susanto, Heru Budi; Nurwantoro; Asfan, Muhammad; Lubis, Dina Mariana Uli
Sewagati Vol 8 No 5 (2024): Preprinted
Publisher : Pusat Publikasi ITS

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Abstract

Pandemi Covid-19 memiliki dampak terhadap berbagai sektor termasuk industri kulit. Kulit tersamak yang telah melalui proses finishing, seringkali mengalami penurunan kualitas akibat penyimpanan yang tidak standar. Kulit samak sebelum digunakan sebagai bahan produk kulit disimpan dalam ruang penyimpanan atau gudang dalam jangka waktu yang lama. Semakin lama kulit tersebut akan menumpuk, ditumbuhi jamur, dan timbul bau yang tidak sedap. Hal ini menimbulkan defek dan menyebabkan turunnya kualitas kulit. Oleh karena itu, pengabdian masyarakat ini diadakan untuk memberikan pengetahuan dan pelatihan tentang perawatan dan penyimpanan kulit dan produk kulit di Kelompok Pengrajin Kulit Setyo Rukun Manding. Metode kegiatan pengabdian masyarakat dimulai dengan observasi masalah, melakukan FGD dengan stakeholder, perumusan solusi dengan tim, persiapan alat dan bahan, pelaksanaan kegiatan, serta pelaporan kegiatan. Kegiatan pengabdian berupa pelatihan dan pendampingan dibagi menjadi beberapa porsi kegiatan, yaitu 60% praktek perbaikan kulit berjamur dan kulit kaku, 20% penyampaian teori, 10% diskusi dan 10% evaluasi. Evaluasi dilakukan dengan melihat hasil perbaikan kulit berjamur dan kulit kaku. Hasil kegiatan pengabdian yaitu didapatkan formulasi untuk mengatasi kulit kaku maupun kulit berjamur di Sentra Kulit Setyo Rukun, Manding. Hasil evaluasi kulit kaku yaitu dengan pengujian kelemasan kulit. Kelemasan kulit meningkat sebesar 0,6 mm dari kulit awal. Sedangkan hasil evaluasi kulit berjamaur yaitu tidak tumbuh jamur pada kulit setelah diinkubasi selama 48 jam.
Utilization Of Chlorella Pyrenoidosa As A Phytoremediator For Tannery Waste Adetya, Nais Pinta; Arifin, Uma Fadzilia; Anggriyani, Emiliana; Rachmawati, Laili
Walisongo Journal of Chemistry Vol 7, No 1 (2024): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v7i1.20749

Abstract

This study aims to analyze the effect of phytoremediation on the bioremoval of COD, ammonia, and Cr (VI) from tannery wastewater and examine its effect on the growth of Chlorella populations. The research method consisted of two stages: first, preparation of liquid waste media. The second is culturing pure cultures followed by microalgae cultivation using leather tanning liquid waste media with a concentration variation of 0%, 10%, 20%, and 30% v/v. Filtrate samples after harvest were analyzed for COD, ammonia, and Cr (VI). The results obtained in this study show that Chlorella can grow in tanning waste media. The highest exponential phase occurs at a concentration of 20% with a growth rate of 0.557. Tannery liquid waste contains inorganic minerals utilized by Chlorella pyrenoidosa cells for growth. Cultivation of Chlorella pyrenoidosa can reduce leather tanning liquid waste parameters, namely COD, ammonia, and Cr (VI).
Pengaruh Waktu Iradiasi Ultrasonik dengan Aktivasi Kalium Hidroksida terhadap Sifat Fisis Karbon Aktif dari Serbuk Karet End Life Tire Arifin, Uma Fadzilia; Adetya, Nais Pinta; Pambudi, Wisnu; Listyalina, Latifah; Ratnaningsih, Wahyu
Jurnal Teknik Kimia USU Vol. 13 No. 2 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i2.15549

Abstract

Processing End Life Tire (ELT) rubber powder into activated carbon is an alternative for handling tire waste. One way to improve physical properties such as proximate characteristics, surface area and pore diameter of activated carbon is through chemical activation assisted by ultrasonic irradiation. This research aims to determine the effect of ultrasonic irradiation time with potassium hydroxide (KOH) activation on the quality of ELT rubber activated carbon. Activated carbon was synthesized and activated using 30% KOH at various ultrasonic irradiation times, namely 0 minutes, 15 minutes, 30 minutes, 45 minutes and 60 minutes. Based on the characterization results, activated carbon with an ultrasonic irradiation time of 30 minutes is the active carbon that has the most superior properties. The proximate characteristics of activated carbon meet the active carbon quality requirements of SNI 06–3730–1995 and have the highest surface area, namely 401.11 m2/g and pore diameter of 2.1652 nm, which is included in the mesoporous structure category so that it has the potential to be applied as an adsorbent for heavy metals from contaminated fluid.
Pengaruh Waktu Iradiasi Ultrasonik dengan Aktivasi Kalium Hidroksida terhadap Sifat Fisis Karbon Aktif dari Serbuk Karet End Life Tire Arifin, Uma Fadzilia; Adetya, Nais Pinta; Pambudi, Wisnu; Listyalina, Latifah; Ratnaningsih, Wahyu
Jurnal Teknik Kimia USU Vol. 13 No. 2 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i2.15549

Abstract

Processing End Life Tire (ELT) rubber powder into activated carbon is an alternative for handling tire waste. One way to improve physical properties such as proximate characteristics, surface area and pore diameter of activated carbon is through chemical activation assisted by ultrasonic irradiation. This research aims to determine the effect of ultrasonic irradiation time with potassium hydroxide (KOH) activation on the quality of ELT rubber activated carbon. Activated carbon was synthesized and activated using 30% KOH at various ultrasonic irradiation times, namely 0 minutes, 15 minutes, 30 minutes, 45 minutes and 60 minutes. Based on the characterization results, activated carbon with an ultrasonic irradiation time of 30 minutes is the active carbon that has the most superior properties. The proximate characteristics of activated carbon meet the active carbon quality requirements of SNI 06–3730–1995 and have the highest surface area, namely 401.11 m2/g and pore diameter of 2.1652 nm, which is included in the mesoporous structure category so that it has the potential to be applied as an adsorbent for heavy metals from contaminated fluid.
Co-Authors Abdullah, Sofwan Siddiq Asfan, Muhammad Dwi Wulandari Emiliana Anggriyani Heru Budi Susanto, Heru Budi Laili Rachmawati Listyalina, Latifah Lubis, Dina Mariana Uli Nurwantoro Pambudi, Wisnu Putri, Naimah Rahmawati, Atiqa Ratnaningsih, Wahyu Robbika, Fadzkurisma Uma Fadzilia Arifin, Uma Fadzilia