E. R. Desfitri, Aditya Yoga Arifanda, Amro Yulianti, Paysmi Paysmi, Reni Desmiarti
: Tofu liquid waste contains gases that are decomposed organic materials found in air waste such as nitrogen gas (N 2 ), oxygen (O 2 ), hydrogen sulfide (H 2 S), ammonia (NH 3 ), carbon dioxide (CO 2 )
Eko Ariyanto, Muhammad Faris Alqorni, Mardwita Mardwita
: In the CPO processing industry, the efficiency of the economizer plays a crucial role in enhancing production effectiveness. This study aims to analyze the performance of the economizer in transferring heat energy to the fluid flows of Crude Palm Oil (CPO) and Refined Bleached and Deodorized Palm Oil (RBDPO). The research method involved direct observation with measurements of temperature and fluid flow at PT XYZ. From these data, heat loss and thermal efficiency were calculated. The results showed temperature fluctuations in the inflow and outflow of CPO and RBDPO. These fluctuations can be affected by changes in the incoming fluid flow. Fluid flow entered CPO and RBDPO during the research period. The mass flow of RBDPO increased from 33,659.98 kg/hour to 36,720 kg/hour, while CPO's flow peaked at 37,280 kg/hour. The thermal efficiency of the Economizer HE-T521A has an average value of 89.45%. The highest thermal efficiency was achieved on February 22, 2023, reaching 91.09%, while the lowest value occurred on February 24, 2023, amounting to 88.58%. Even though the thermal efficiency is below the design target of 94%, this economizer still provides relatively good thermal efficiency. The results of this study can be used as a basis for further improvement and monitoring to increase the tool's thermal efficiency according to the expected design.
{"title":"Efisiensi Thermal Alat Economizer pada Pre-Treatment Section dalam Pengolahan Crude Palm Oil (CPO)","authors":"Eko Ariyanto, Muhammad Faris Alqorni, Mardwita Mardwita","doi":"10.31315/e.v21i1.9974","DOIUrl":"https://doi.org/10.31315/e.v21i1.9974","url":null,"abstract":": In the CPO processing industry, the efficiency of the economizer plays a crucial role in enhancing production effectiveness. This study aims to analyze the performance of the economizer in transferring heat energy to the fluid flows of Crude Palm Oil (CPO) and Refined Bleached and Deodorized Palm Oil (RBDPO). The research method involved direct observation with measurements of temperature and fluid flow at PT XYZ. From these data, heat loss and thermal efficiency were calculated. The results showed temperature fluctuations in the inflow and outflow of CPO and RBDPO. These fluctuations can be affected by changes in the incoming fluid flow. Fluid flow entered CPO and RBDPO during the research period. The mass flow of RBDPO increased from 33,659.98 kg/hour to 36,720 kg/hour, while CPO's flow peaked at 37,280 kg/hour. The thermal efficiency of the Economizer HE-T521A has an average value of 89.45%. The highest thermal efficiency was achieved on February 22, 2023, reaching 91.09%, while the lowest value occurred on February 24, 2023, amounting to 88.58%. Even though the thermal efficiency is below the design target of 94%, this economizer still provides relatively good thermal efficiency. The results of this study can be used as a basis for further improvement and monitoring to increase the tool's thermal efficiency according to the expected design.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140483143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. D. Nyamiati, Daniel Timotius, Septi Sri Sri Rahmawati, Calista Carissavila, Noor Amalia
The treatment of industrial wastewater has gained significant attention in recent years due to its detrimental impact on the environment and public health. This study aims to explore the effectiveness of a photocatalytic hybrid system using a Chitosan-TiO2 membrane for the degradation of batik waste. The performance of the membrane was investigated through a series of experiments, evaluating its ability to remove organic pollutants and enhance the overall treatment efficiency. The morphology, as seen through SEM images, shows a rough surface that enhances photocatalytic efficiency by providing a larger surface area for reactions. The uniform distribution of TiO2 particles within the chitosan matrix is crucial for stable and efficient pollutant degradation during photocatalysis. Furthermore, Chitosan-TiO2 membranes offer a promising solution for batik wastewater treatment. They combine the benefits of chitosan's permeability and organic substance capture with TiO2's photocatalytic capabilities. This integration allows for efficient, one-step hybrid photocatalytic filtration, reducing the use of harmful chemicals and producing environmentally friendlier byproducts. Finally, AAS analysis demonstrated that the addition of TiO2 improved heavy metal degradation in batik waste, with optimal performance observed up to a 89.78% rejection rate, beyond which TiO2 agglomeration occurred.
{"title":"Effect of Chitosan-TiO2 Membrane Performance for the Degradation of Batik Waste with a Photocatalytic Hybrid System","authors":"R. D. Nyamiati, Daniel Timotius, Septi Sri Sri Rahmawati, Calista Carissavila, Noor Amalia","doi":"10.31315/e.v21i1.10734","DOIUrl":"https://doi.org/10.31315/e.v21i1.10734","url":null,"abstract":"The treatment of industrial wastewater has gained significant attention in recent years due to its detrimental impact on the environment and public health. This study aims to explore the effectiveness of a photocatalytic hybrid system using a Chitosan-TiO2 membrane for the degradation of batik waste. The performance of the membrane was investigated through a series of experiments, evaluating its ability to remove organic pollutants and enhance the overall treatment efficiency. The morphology, as seen through SEM images, shows a rough surface that enhances photocatalytic efficiency by providing a larger surface area for reactions. The uniform distribution of TiO2 particles within the chitosan matrix is crucial for stable and efficient pollutant degradation during photocatalysis. Furthermore, Chitosan-TiO2 membranes offer a promising solution for batik wastewater treatment. They combine the benefits of chitosan's permeability and organic substance capture with TiO2's photocatalytic capabilities. This integration allows for efficient, one-step hybrid photocatalytic filtration, reducing the use of harmful chemicals and producing environmentally friendlier byproducts. Finally, AAS analysis demonstrated that the addition of TiO2 improved heavy metal degradation in batik waste, with optimal performance observed up to a 89.78% rejection rate, beyond which TiO2 agglomeration occurred.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140496908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
: Banana peel waste, which is rich in nutrients and minerals, has potential to be converted into bacterial cellulose. In this research, reaction kinetics for bacterial cellulose production from banana peel was investigated. The kinetic model used in this research were fermentation kinetics method. Based on the results, it showed that bacterial cellulose production was at an exponential stage for 14 days fermentation. Fermentation time affects the bacterial cellulose production where longer fermentation time used will produce higher bacterial cellulose. Banana peel as a raw material can be used for carbon source in fermentation besides glucose. Kinetic parameters of bacterial cellulose production from banana peel according to the optimization results between data and kinetic model produced kinetics reaction parameters, such as µmax (maximum specific growth rate), ks (monod constant), kd (cell death rate constant) and m (cell maintenance constant) were 0.29/day, 2.05 g/L, 1.13/day, and 1.32/day.
{"title":"Kinetika Produksi Selulosa Bakteri dari Limbah Kulit Pisang","authors":"J. R. H. Panjaitan, Devin Sitompul","doi":"10.31315/e.v21i1.10677","DOIUrl":"https://doi.org/10.31315/e.v21i1.10677","url":null,"abstract":": Banana peel waste, which is rich in nutrients and minerals, has potential to be converted into bacterial cellulose. In this research, reaction kinetics for bacterial cellulose production from banana peel was investigated. The kinetic model used in this research were fermentation kinetics method. Based on the results, it showed that bacterial cellulose production was at an exponential stage for 14 days fermentation. Fermentation time affects the bacterial cellulose production where longer fermentation time used will produce higher bacterial cellulose. Banana peel as a raw material can be used for carbon source in fermentation besides glucose. Kinetic parameters of bacterial cellulose production from banana peel according to the optimization results between data and kinetic model produced kinetics reaction parameters, such as µmax (maximum specific growth rate), ks (monod constant), kd (cell death rate constant) and m (cell maintenance constant) were 0.29/day, 2.05 g/L, 1.13/day, and 1.32/day.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140498189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hardito Sussatrio, Hadiyanto Hadiyanto, W. Widayat
: The optimization of methyl diethanolamine (MDEA) and monoethanolamine (MEA) composition as absorbents in CO 2 gas-sweetening processes is a crucial endeavor for industries aiming to enhance the efficiency, environmental protection
{"title":"Optimasi Komposisi MDEA dan MEA Sebagai Absorbent untuk Proses Penghilangan CO2 dalam Produksi Gas di Lapangan A","authors":"Hardito Sussatrio, Hadiyanto Hadiyanto, W. Widayat","doi":"10.31315/e.v21i1.10855","DOIUrl":"https://doi.org/10.31315/e.v21i1.10855","url":null,"abstract":": The optimization of methyl diethanolamine (MDEA) and monoethanolamine (MEA) composition as absorbents in CO 2 gas-sweetening processes is a crucial endeavor for industries aiming to enhance the efficiency, environmental protection","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140511835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wilda Ayu Putri, Muhammad Ariq Al Maqsidi, Zubaidi Achmad, Faizah Hadi, Muhamad Maulana Azimatun Nur
Indonesia merupakan negara kepulauan dengan keanekaragaman hayati sehingga memilliki potensi bagi perairan Indonesia untuk mikroalga dapat tumbuh dan berkembang. Mikroalga Haematococcus sp . dikenal mengandung senyawa karotenoid, khususnya senyawa astaxanthin. Astaxanthin berkhasiat sebagai antioksidan yang dapat dimanfaatkan sebagai suplemen kesehatan. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pelarut, volume pelarut, dan lama waktu ekstraksi terhadap kadar astaxanthin. Ekstraksi dilakukan dengan metode Ultrasound Assisted Extraction (UAE). Penelitian ini menggunakan metode percobaan dengan Rancangan Acak Lengkap (RAL) factorial dengan tiga variabel bebas yaitu jenis pelarut, volume pelarut dan waktu ekstraksi pada proses ekstraksi. Pada penelitian ini dilakukan analisis kadar astaxanthin dalam Haematococcus sp. yang diperoleh dari hasil kultivasi sendiri, kemudian dilakukan pengukuran kadar astaxanthin menggunakan spektrofotometri UV-Vis pada panjang gelombang 478 nm. Hasil pengukuran menunjukkan kadar astaxanthin tertinggi pada variasi pelarut aseton dengan volume 10 ml lama waktu 25 menit sebesar 0,0677%.
{"title":"Pengaruh Pelarut, Rasio Pelarut, dan Waktu Ekstraksi Terhadap Astaxanthin dari Haematococcus sp. dengan Bantuan Ultrasound Assisted Extraction","authors":"Wilda Ayu Putri, Muhammad Ariq Al Maqsidi, Zubaidi Achmad, Faizah Hadi, Muhamad Maulana Azimatun Nur","doi":"10.31315/e.v20i3.10733","DOIUrl":"https://doi.org/10.31315/e.v20i3.10733","url":null,"abstract":"Indonesia merupakan negara kepulauan dengan keanekaragaman hayati sehingga memilliki potensi bagi perairan Indonesia untuk mikroalga dapat tumbuh dan berkembang. Mikroalga Haematococcus sp . dikenal mengandung senyawa karotenoid, khususnya senyawa astaxanthin. Astaxanthin berkhasiat sebagai antioksidan yang dapat dimanfaatkan sebagai suplemen kesehatan. Penelitian ini bertujuan untuk mengetahui pengaruh jenis pelarut, volume pelarut, dan lama waktu ekstraksi terhadap kadar astaxanthin. Ekstraksi dilakukan dengan metode Ultrasound Assisted Extraction (UAE). Penelitian ini menggunakan metode percobaan dengan Rancangan Acak Lengkap (RAL) factorial dengan tiga variabel bebas yaitu jenis pelarut, volume pelarut dan waktu ekstraksi pada proses ekstraksi. Pada penelitian ini dilakukan analisis kadar astaxanthin dalam Haematococcus sp. yang diperoleh dari hasil kultivasi sendiri, kemudian dilakukan pengukuran kadar astaxanthin menggunakan spektrofotometri UV-Vis pada panjang gelombang 478 nm. Hasil pengukuran menunjukkan kadar astaxanthin tertinggi pada variasi pelarut aseton dengan volume 10 ml lama waktu 25 menit sebesar 0,0677%.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135454821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kitosan merupakan biopolimer yang terdiri atas monomer glukosamin serta memiliki potensi sangat besar untuk dikembangkan sebagai biomaterial. Berdasarkan karakternya, kitosan larut dalam asam lemah dan tidak larut dalam air. Pada penelitian ini, kitosan dimodifikasi menjadi ukuran nano (nanokitosan) untuk meningkatkan kapabilitasnya sebagai membran dan digunakan sebagai coating agent dalam pembuatan pupuk NPK yang berbasis Control Release Fertilizer . Sintesis nanokitosan dilakukan dengan metode gelasi ionik dengan memberikan variasi pada lama pengadukan dan konsentrasi crosslinker. Variasi lama waktu pengadukan yang diberikan adalah 5 menit, 10 menit, dan 15 menit. Crosslinker yang digunakan dalam penelitian ini adalah Sodium Tripolyphosphate (STPP) dengan variasi konsentrasi 0,2%; 0,25%; 0,3%. Dari hasil uji release yang dilakukan, didapatkan nanokitosan dengan variasi lama pengadukan 15 menit dengan konsentrasi STPP 0,3% sebagai variasi yang paling optimal dengan release paling kecil. Melalui karakterisasi PSA, didapatkan ukuran nanokitosan tersebut sebesar 202,1 nm, dengan bentuk morfologi yang berbentuk bulatan teraglomerasi pada hasil SEM. Karakterisasi XRD yang didapatkan menunjukkan bahwa partikel bersifat amorf. Sedangkan pada hasil FTIR, didapatkan perbedaan vibrasi antara kitosan dengan nanokitosan pada bagian ikatan crosslink yang terbentuk.
{"title":"Pemanfaatan Nanokitosan Sebagai Coating Agent dalam Pembuatan Pupuk NPK Berbasis Control Release Fertilizer","authors":"Richad Ade Sastra, Totok Adiarto, Antonius Budi Prasetyo, Handoko Darmokoesoemo, Devi Indrasari Mustopa Putri","doi":"10.31315/e.v20i3.10699","DOIUrl":"https://doi.org/10.31315/e.v20i3.10699","url":null,"abstract":"Kitosan merupakan biopolimer yang terdiri atas monomer glukosamin serta memiliki potensi sangat besar untuk dikembangkan sebagai biomaterial. Berdasarkan karakternya, kitosan larut dalam asam lemah dan tidak larut dalam air. Pada penelitian ini, kitosan dimodifikasi menjadi ukuran nano (nanokitosan) untuk meningkatkan kapabilitasnya sebagai membran dan digunakan sebagai coating agent dalam pembuatan pupuk NPK yang berbasis Control Release Fertilizer . Sintesis nanokitosan dilakukan dengan metode gelasi ionik dengan memberikan variasi pada lama pengadukan dan konsentrasi crosslinker. Variasi lama waktu pengadukan yang diberikan adalah 5 menit, 10 menit, dan 15 menit. Crosslinker yang digunakan dalam penelitian ini adalah Sodium Tripolyphosphate (STPP) dengan variasi konsentrasi 0,2%; 0,25%; 0,3%. Dari hasil uji release yang dilakukan, didapatkan nanokitosan dengan variasi lama pengadukan 15 menit dengan konsentrasi STPP 0,3% sebagai variasi yang paling optimal dengan release paling kecil. Melalui karakterisasi PSA, didapatkan ukuran nanokitosan tersebut sebesar 202,1 nm, dengan bentuk morfologi yang berbentuk bulatan teraglomerasi pada hasil SEM. Karakterisasi XRD yang didapatkan menunjukkan bahwa partikel bersifat amorf. Sedangkan pada hasil FTIR, didapatkan perbedaan vibrasi antara kitosan dengan nanokitosan pada bagian ikatan crosslink yang terbentuk.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kualitas Precipitated Calcium Carbonate yang dapat digunakan di industri kertas dan cat harus bebas dari klorin, karena dapat menyebabkan korosi pada peralatan. Hasil penelitian skala pilot plant kapasitas 2 kg/jam, produk PCC masih mengandung klorin (0,73 s/d 2,02 %), sedangkan standar industri <0,001%. Penelitian ini bertujuan untuk menghilangkan kadar klorin dengan metoda pencucian dan filtrasi tanpa vacuum dan metode kedua pencucian dan filtrasi dengan vacuum filter . Proses pencucian menggunakan air PDAM, air hujan dan aquadest dengan rasio PCC dengan air pencucinya yaitu 1:1, 1:2, 1:3 dan 1:4. PCC yang dihasilkan dari pilot plant dengan dua jenis PCC yaitu PCC dengan konsentrasi pelarut NH 4 Cl 12,5 g/L dan 50 g/L. Hasil penelitian menunjukkan penggunaan air PDAM dapat menurunkan kadar klorin 0,0322% (NH 4 Cl 12,5 g/L) dan 0,0959% (NH 4 Cl 50 g/L) dengan metoda pencucian dan filtrasi tanpa vakum dengan rasio 1:4. Kadar klorin yang diperoleh pada metode pencucian dan filtrasi dengan vacuum filter kadar klorin menjadi 0,0203% (pelarut NH 4 Cl 12,5 g/L) dan 0,0364% (pelarut NH 4 Cl 50 g/L). Morfologi PCC dipengaruhi konsentrasi NH 4 Cl. Kristal kalsit untuk konsentrasi NH 4 Cl (12,5 g/L) dan kristal aragonit untuk konsentrasi NH 4 Cl 50 g/L. Ukuran partikel yang diperoleh PCC 0 - 16 µm.
{"title":"Penghilangan Kadar Klorine pada Precipitate Calcium Carbonate (PCC) dengan Proses Pencucian dan Filtrasi","authors":"Nofri Naldi, Syukri Arief, Reni Desmiarti, Ellyta Sari, Erda Rahmilaila Desfitri","doi":"10.31315/e.v20i3.9684","DOIUrl":"https://doi.org/10.31315/e.v20i3.9684","url":null,"abstract":"Kualitas Precipitated Calcium Carbonate yang dapat digunakan di industri kertas dan cat harus bebas dari klorin, karena dapat menyebabkan korosi pada peralatan. Hasil penelitian skala pilot plant kapasitas 2 kg/jam, produk PCC masih mengandung klorin (0,73 s/d 2,02 %), sedangkan standar industri <0,001%. Penelitian ini bertujuan untuk menghilangkan kadar klorin dengan metoda pencucian dan filtrasi tanpa vacuum dan metode kedua pencucian dan filtrasi dengan vacuum filter . Proses pencucian menggunakan air PDAM, air hujan dan aquadest dengan rasio PCC dengan air pencucinya yaitu 1:1, 1:2, 1:3 dan 1:4. PCC yang dihasilkan dari pilot plant dengan dua jenis PCC yaitu PCC dengan konsentrasi pelarut NH 4 Cl 12,5 g/L dan 50 g/L. Hasil penelitian menunjukkan penggunaan air PDAM dapat menurunkan kadar klorin 0,0322% (NH 4 Cl 12,5 g/L) dan 0,0959% (NH 4 Cl 50 g/L) dengan metoda pencucian dan filtrasi tanpa vakum dengan rasio 1:4. Kadar klorin yang diperoleh pada metode pencucian dan filtrasi dengan vacuum filter kadar klorin menjadi 0,0203% (pelarut NH 4 Cl 12,5 g/L) dan 0,0364% (pelarut NH 4 Cl 50 g/L). Morfologi PCC dipengaruhi konsentrasi NH 4 Cl. Kristal kalsit untuk konsentrasi NH 4 Cl (12,5 g/L) dan kristal aragonit untuk konsentrasi NH 4 Cl 50 g/L. Ukuran partikel yang diperoleh PCC 0 - 16 µm.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For centuries, batik fabric has been a part of Indonesian culture and is recognized by UNESCO as an Intangible Cultural Heritage of Humanity. Batik fabric is essential for daily use and has become a part of Indonesian people, e.g., birth to death ceremonies. Besides some advantages of batik fabric made from cotton, it also has disadvantages because it quickly grows bacterial. Hence, it is essential to develop antibacterial properties on batik fabrics. This study used ZnO as an antibacterial agent. The mechanical properties and the colorfastness of fabrics have been evaluated to study the effect of ZnO application. The results showed that applying ZnO affected the mechanical properties of batik fabric by increasing the tensile strength and elongation at break. The result also showed that the ZnO did not affect the colorfastness of rubber and light by the similar value of untreated batik fabric.
{"title":"Effect of ZnO Addition on The Characteristics of Cotton Fabric in The Batik Fabric Dyeing Process","authors":"Siti Fatimah, Syaifunnisa Puspa Kencana, Shofwatul 'Aarifah, Istihanah Nurul Eskani","doi":"10.31315/e.v20i3.9895","DOIUrl":"https://doi.org/10.31315/e.v20i3.9895","url":null,"abstract":"For centuries, batik fabric has been a part of Indonesian culture and is recognized by UNESCO as an Intangible Cultural Heritage of Humanity. Batik fabric is essential for daily use and has become a part of Indonesian people, e.g., birth to death ceremonies. Besides some advantages of batik fabric made from cotton, it also has disadvantages because it quickly grows bacterial. Hence, it is essential to develop antibacterial properties on batik fabrics. This study used ZnO as an antibacterial agent. The mechanical properties and the colorfastness of fabrics have been evaluated to study the effect of ZnO application. The results showed that applying ZnO affected the mechanical properties of batik fabric by increasing the tensile strength and elongation at break. The result also showed that the ZnO did not affect the colorfastness of rubber and light by the similar value of untreated batik fabric.","PeriodicalId":30703,"journal":{"name":"Eksergi","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135455844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Indriana Lestari, Yuli Ristianingsih, Alit Istiani, Titi Tiara Anasstasia
Adsorben berupa pektin berhasil diekstraksi dari kulit pisang menggunakan larutan asam kuat dan telah digunakan untuk menyisihkan ion Fe 3+ dalam air. Pengaruh berbagai parameter terhadap proses adsorbsi, seperti waktu kontak, pH larutan, dosis adsorben, dan temperatur adsorbsi diinvestigasi dalam suatu sistem batch. Konsentrasi ion Fe 3+ dalam larutan air diukur menggunakan Atomic Absorption Spectrometry . Efisiensi adsorbsi terbaik diperoleh pada waktu kontak selama 4 jam, pH larutan 2, dosis adsorben sebesar 3 g, dan temperatur 20 o C. Mekanisme proses adsorbsi dan perubahan energi bebas Gibbs, entalpi, serta entropi telah dievalusi. Model isoterm Freundlich dan Temkin paling sesuai untuk menggambarkan mekanisme adsorbsi ion Fe 3+ pada pektin dengan R 2 berturut-turut 0,9871 dan 0,9591. Data parameter termodinamika membuktikan bahwa adsorpsi ion Fe 3+ bersifat eksotermis dan berlangsung secara tidak spontan pada rentang temperatur 20 hingga 60ᵒC. Penelitian ini menunjukkan bahwa kulit pisang dapat dimanfaatkan sebagai adsorben murah yang menjanjikan untuk menghilangkan ion Fe 3+ dalam air.
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