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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Pendas : Jurnah Ilmiah Pendidikan Dasar CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Hijau Infotekmesin Madani : Indonesian Journal of Civil Society Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Jurnal Pengabdian kepada Masyarakat ACROPORA: Jurnal Ilmu Kelautan dan Perikanan Papua Jurnal Teknik Kimia dan Lingkungan Hikmayo: Jurnal Pengabdian Masyarakat
Evila Purwanti Sri Rahayu, Theresia
Politekanik Negeri Cilacap
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Penjerapan Urea dengan Karbon Aktif dari Kayu Bakar Rahayu, Theresia Evila Purwanti Sri; Amrullah, Shafwan
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 2 No. 2 (2020): JPPL, September 2020
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v2i2.344

Abstract

Activated carbon is a universal adsorbent possessing extensive function in human life. Adsorbent has been used in waste effluent treatment to adsorb variety substances mainly in the form of liquid and gas pollutants, odor adsorbent, food preservative, nutrient carrier for plant, and as fuel cell. Adsorbent is become an interest for its highly adsorption capacity due to its abundant pores on its surface resulting wide surface area, its simple manufacturing, its easy finding raw materials-even from waste material, and its relatively low cost of manufacturing. The purpose of this study is to investigate adsorption capacity and urea uptake percentage of activated carbon made from pyrolyzed firewood. The results obtained in this research are activated carbon from pyrolyzed firewood has urea adsorption capacity 0,026 mg urea/g adsorbent at urea concentration of 500 mg/L as high as 479 mg urea/g adsorbent at urea concentration of 50000 mg/L and urea uptake percentage 8,8 % v/v. This result shows that activated carbon from pyrolyzed firewood has capability to adsorb urea molecules form aqueous solution and therefore pyrolyzed firewood can be an alternative of low cost adsorbent for treating wastewater containing urea.
Making Charcoal from Nipah (Nypa fruticans) Frond Waste as an Adsorbent to Extend the Shelf Life of Fresh Bread Nur Sabila, Ayu; Rahayu, Theresia Evila Purwanti Sri; Prasadi, Oto
Jurnal Teknik Kimia dan Lingkungan Vol. 7 No. 2 (2023): October 2023
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v7i2.3643

Abstract

Fresh bread has high potential for creating food waste that increases every year, because of its relatively short shelf life of 3-4 days after leaving the baking process. One way to extend the shelf life of bread is by using charcoal. Nipah fronds contain lignin elements that are good for charcoal. This study aims to determine the characteristics of charcoal from nipah fronds, the effectiveness of charcoal's ability to extend the shelf life of fresh bread, the effect of burning time, particle size and adsorbent mass on the storage time of fresh bread, the effect of the ratio of nipah frond adsorbent to commercial silica gel on the storage time compared to quality requirements of fresh bread of SNI 01-3840-1995 2013. Charcoal characterization includes quality tests based on SNI No. 06-3730-1995 on technical charcoal, namely water content and iodine absorption parameters and also Scanning Electron Microscopy (SEM) test. Based on the results of the study, charcoal from nipah frond waste has characteristics of water content that have met the quality standards of SNI 06-3730-1995 and in iodine absorbency only samples with pyrolysis time of 4 hours that have met the quality standards of SNI 06-3730-1995. Giving variations in charcoal burning time, mass and particle size of adsorbent powder affects the shelf life and quality requirements of fresh bread. Adsorbent packaging using teabags and silica gel paper can extend the shelf life of fresh bread up to 27 hours compared to those without adsorbent.
Pengaruh Variasi Konsentrasi H3PO4 Sebagai Zat Aktivator Terhadap Karakteristik Karbon Aktif dari Sekam Padi Dwityaningsih, Rosita; Rahayu, Theresia Evila Purwanti Sri; Handayani, Murni; Nurhilal, Mohammad
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1641

Abstract

Rice husk is an organic material that has a high lignocellulosic content so it has the potential to be turned into activated carbon. One method of making activated carbon is activation with a phosphoric acid activator (H3PO4). The purpose of this research was to study the effect of varying concentrations of H3PO4 as an activator on the characteristics of rice husk-activated carbon. The characterization refers to SNI 06-3730-1995 regarding the technical quality requirements of activated charcoal. Activation of rice husk carbon was carried out by contacting the carbon with H3PO4 for 24 hours and shaking it. The H3PO4 consisted of 3 concentration variations, namely 4M, 6M, and 8M. From the research results, the water content was 3.936%; 4.037%; 4.070%, the absorption of iodine has met the character of activated charcoal according to SNI, namely 1217.204 mg/g; 1204.255 mg/g; 1184.832 mg/g while the ash content value does not meet the SNI standard, which is still above 10%. The highest adsorption capacity and adsorption efficiency could be activated with 8M H3PO4, namely 22.42 mg/g and 89.68%. IR spectra on activated carbon with three variations of H3PO4 concentration showed the presence of aromatic C-H, C=C, and C-O anhydride functional groups.
Analisis Porositas, Tekstur, dan Morfologi Karbon Tempurung Nipah Hasil Pirolisis Suhu Tinggi Untuk Anoda Baterai Sekunder Rahayu, Theresia Evila Purwanti Sri; Nurhilal, Mohammad; Dwityaningsih, Rosita
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1666

Abstract

Lithium-ion batteries are the recent main store of electrochemical energy that have been widely used for electronic equipment, electric vehicles, and also renewable energy storage such as wind and solar. Lithium-ion batteries have many electrochemical advantages but lithium availability in nature is reduced very quickly and its distribution is uneven throughout the world. Sodium is attractive as an alternative to lithium insertion for secondary batteries because of its abundant availability and oxidation reduction potential to standard hydrogen electrodes only 0.3 volts higher than lithium. This study aims to synthesize hard carbon from nipah shell biomass using thermal methods of low-temperature pyrolysis (lower than 200 oC) followed by high-temperature pyrolysis (higher than 1000 oC). Characterization is carried out by iodine number analysis to determine porosity and SEM-EDX to determine texture and morphology. The result of the analysis of carbon iodine number is 346.86 mg/g while SEM-EDX analysis showed that carbon has a structure similar to a combination of graphene and nano-tube carbon.
PENGOLAHAN BUAH PEDADA MENJADI SIRUP DAN PUPUK ORGANIK DI KAWASAN WISATA CIGIMBAL PARK KABUPATEN CILACAP Nurlinda Ayu Triwuri; Theresia Evila Purwanti Sri Rahayu; Oto Prasadi; Annisa Yuliana Angeline; Nur Indah Wardani; Murni Handayani; Ilma Fadlilah
HIKMAYO: JURNAL PENGABDIAN MASYARAKAT AMAYO Vol. 5 No. 1 (2026): HIKMAYO : Jurnal Pengabdian Masyarakat
Publisher : LPPM Akademi Manajemen Administrasi Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56606/hikmayo.v5i1.379

Abstract

The mangrove forest in Cilacap Regency, Central Java, is located in the Cigimbal Park area of ??Tritih Kulon Village. Mangroves grow in river mouths or estuaries, where organic sediment and mud are collected. One type of mangrove, namely pedada fruit (Sonneratia alba), contains flavonoids, terpenoids, tannins, phenolics, steroids, and other bioactive compounds that function as antioxidants. The implementation method of community service activities consists of socialization and training stages. Based on the content of pedada fruit, pedada fruit processed into syrup also has nutritional content such as 1.20% protein, 0.20% fat, 3.50% carbohydrates, and 55.30% vitamin C. The storage time of pedada syrup at room temperature lasts for 7 days, if at a cold temperature of 4oC lasts for 30 days. In addition, the residue from pedada syrup production in the form of pedada skin, petals and dregs can be processed into organic fertilizer. The decomposition period of organic material is added with effective microorganisms 4 for 28 days, until it is black and odorless.
Synthesis of KAl(SO4)2 Solid Coagulants from Used Pots and Beverage Cans Nanda Mustikarini; Ilma Fadlilah; Theresia Evila Purwanti Sri Rahayu
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.17766.84-89

Abstract

Used pots and beverage cans are good sources of aluminum-rich raw materials for the synthesis of potassium aluminum sulfate (KAl(SO4)2), a solid coagulant. The synthesis process includes preparation, dissolution, extraction, sedimentation, and drying. Therefore, this research aimed to determine the characteristics of KAl(SO4)2 synthesized from aluminum pots and beverage cans waste, adjusted to the quality requirements of commercial KAl(SO4)2 according to SNI 06-2102-1991 standard. The materials used were aluminum pots, as well as a mixture of pots and beverage cans, with varying concentrations of 20%, 30%, and 40% KOH solvent. The synthesis results, characterized by XRF (X-ray fluorescence), showed an Al content of 0.001-3%. In addition, the results of the data analysis, adapted to SNI 06-2102-1991 standard for potassium aluminum sulfate, indicated that the synthesis met the required parameters for water-insoluble parts, Fe, Pb, and As, and Al2SO3, which was close to the quality requirements.
KARBON AKTIF AMPAS KOPI HOUSE BLEND TERAKTIVASI H₂SO₄ UNTUK PENGOLAHAN LIMBAH LAUNDRY Amalia Zahra; Theresia Evila Purwanti Sri Rahayu; Ilma Fadlilah
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 No. 03, September 2026 Processed
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Direct discharge of laundry wastewater without treatment causes negative environmental impacts due to high levels of Methylene Blue Active Substances (MBAS), phosphate, and ammonia. This study aims to utilize house blend coffee ground waste as a raw material for activated carbon activated with sulfuric acid (H2SO4) to reduce these pollutants. Coffee grounds were pyrolyzed at 200°C for 2 hours and activated with varying H2SO4 concentrations of 10% (AK10), 20% (AK20), and 30% (AK30). The activated carbon was characterized according to SNI 06-3730-1995, including moisture content, ash content, iodine number, functional groups (FTIR), and total carbon content, then applied to laundry wastewater in a batch system (dose 4 g/L, 200 rpm, 60 minutes). The results show that moisture content (0.1477-0.3751%) and ash content (8.9970-9.2211%) of all samples met the SNI standard, while the iodine number (116.96-132.735 mg/g) and total carbon content (43.26-60.27% w/w) did not meet the SNI minimum thresholds (750 mg/g and 65% w/w). FTIR analysis confirmed successful surface sulfonation, indicated by a sharp S-O absorption peak after activation. In the application stage, the highest reduction effectiveness for MBAS was achieved by AK20 at 58.86% (from 30.51 to 12.55 mg/L), for phosphate by AK30 at 29.20% (from 1.736 to 1.229 mg/L, meeting the 2 mg/L quality standard), and for ammonia by AK30 at 11.79% (from 10.94 to 9.650 mg/L, meeting the 10 mg/L quality standard). An activator concentration of 20-30% proved to be the optimum range, although the MBAS parameter did not reach the discharge standard due to the high initial pollutant load. This study demonstrates that H2SO4-activated house blend coffee ground activated carbon has potential as an environmentally friendly adsorbent for the pretreatment of laundry wastewater, with further optimization needed in pyrolysis temperature and contact time.
Co-Authors Amalia Zahra Amrullah, Shafwan Annisa Yuliana Angeline Ayu - Pramita Ayu Pramita Cyrilla Oktaviananda Devi Fitriana Dhau Aprilia Hakim Dwityaningsih, Rosita Fadlilah, Ilma Harits Fadhillah Immaduddin Ilma Fadlilah Imam Prasetyo Khoeruddin Witriansyah Lutfi Syafirullah Mardiyana Mardiyana Mardiyana Mardiyana Mohammad Nurhilal Mohammad Nurhilal Murni Handayani Murni Handayani Nanda Mustikarini Nur Indah Wardani Nur Sabila, Ayu Nurkholis Nurlinda Ayu Triwuri Nurlinda Ayu Triwuri Oman Somantri Oto Prasadi Oto Prasadi Prasadi, Oto Prasetya, Vicky Radhi Ariawan Rosita Dwityaningsih Rosita Dwityaningsih Roy Aries Permana Tarigan Teguh Ariyanto Ulikaryani, Ulikaryani Venesa Thalia Putri Vicky Prasetia