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All Journal IPTEK The Journal of Engineering Eksergi: Chemical Engineering Journal Indonesian Journal of Chemistry Jurnal Pengembangan Ilmu dan Praktik Kesehatan
Siti Nurkhamidah
Institut Teknologi Sepuluh Nopember, Surabaya
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health

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Aplikasi Membran Komposit PSF/Zeolit untuk Pemisahan Zat Warna Methylene Blue Nurkhamidah, Siti; Rahmawati, Yeni; Virdiansyah, Wahyu Fiqih
Eksergi Vol 21 No 3 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i3.12439

Abstract

Industri tekstil menghasilkan limbah cair dengan kandungan zat warna sekitar 40%. Metilen biru adalah zat warna yang dapat berdampak pada terganggunya ekosistem perairan dan kesehatan manusia karena bersifat karsinogenik. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan zeolit pada membran polisulfon (PSF) terhadap kinerja membran dalam penyisihan metilen biru. Metode pembuatan membran menggunakan metode inversi fasa dengan N-Methyl-2-pyrrolidone (NMP) sebagai solvent dan akuades sebagai nonsolvent. Karakterisasi membran berdasarkan uji SEM-EDX, menunjukkan zeolit terdeposit pada permukaan membran secara merata. Pada penyisihan metilen biru didapatkan permeabilitas lebih rendah dengan menggunakan zeolit dibanding yang tidak menggunakan zeolit. Sedangkan rejeksi membran PSF dengan zeolit lebih tinggi daripada membran PSF tanpa zeolit. Rejeksi membran PSF dengan zeolit didapatkan hasil hingga 93%.
Pengaruh Gliserol sebagai Plasticizer terhadap Karakterisasi Edible Film dari Kappa Karaginan Larasati, Wahyu Adinda; Rahmawati, Yeni; Taufany, Fadlilatul; Susianto, Susianto; Altway, Ali; Nurkhamidah, Siti
Eksergi Vol 21 No 3 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i3.12451

Abstract

Perkembangan industri pengemasan makanan di era mendatang akan beralih ke bahan alami dan ramah lingkungan yang bisa diproduksi dari biopolimer seperti pati dan hidrokoloid lainnya untuk mengurangi paparan polusi dari polimer sintetis. Kappa karaginan memiliki sifat yang rapuh, sehingga dibutuhkan plasticizer untuk menghasilkan edible film yang lebih elastis. Jenis plasticizer yang digunakan adalah gliserol. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi gliserol terhadap karakterisasi edible film dari kappa karaginan. Kappa karaginan dengan konsentrasi 1% (b/v) dilarutkan dengan akuades kemudian ditambahkan gliserol dengan variasi konsentrasi 0,5; 1; 1,5, dan 2% (b/v). Edible film kemudian di karakterisasi berdasarkan sifat mekanik, gugus fungsional, ketebalan, kadar air, kuat tarik, elongasi, warna dan opacity. Hasil analisa menunjukkan bahwa penambahan gliserol sebesar 1% dapat meningkatkan sifat mekaniknya, dan film mempunyai 0,146 mm, kadar air 17,90%, kuat tarik dan elongasi 2,53 MPa dan 14,09% dan sifat optik warna dan opacity masing-masing sebesar 96,96% dan 1,32. 
Effect of Immersion Time on CA/NMP Membrane Preparation for Microplastic Separation in Water Rahmah, Annisa Alifia; Rifai, Muhammad Ayub; Nurkhamidah, Siti; Rahmawati, Yeni
Eksergi Vol 21 No 2 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i2.12854

Abstract

Indonesia produces more than 4.8 million tons of plastic waste every year, but it has not been managed properly so that it will end up in Indonesian waters. This plastic waste is then decomposed into microplastics (MPs) which are <5 mm in size. The presence of MPs in Indonesian waters can have a negative impact on living things, so it needs to be separated from the waters. One method that is considered to separate MPs in water is microfiltration using Membrane Technology. This study aims to determine the effect of immersion time on the characteristics and performance of microfiltration membranes. The fabrication of membrane was prepared using phase inversion method, with Cellulose Acetate (CA)/N-Methyl-2Pyrrolidone (NMP) as polymer/solvent and distilled water as non-solvent. Characteristics analysis to determine the hydrophilicity of the membrane such as contact angle, moisture content, porosity and pore size of the membrane. Scanning Electrone Microscope (SEM) to determine the surface morphology and structure of the membrane, and analysis of microplastic rejection in water. The results of the characteristic analysis showed that the membrane was hydrophilic with a contact angle in the range of 61-53°, porosity of 80-83%, moisture content of 79-82% and pore size of 8.4-5.8 μm in accordance with the microfiltration membrane, as well as the membrane rejection ability reached 99%. So that membrane technology needs to be developed again to separate MPs in water.
Computational Study on Urea Concentration Profiles in Hemodialysis Hollow Fiber Membranes Under Different Blood Flow Conditions Purwanto, Belinda Kezia; Rahmawati, Yeni; Nurkhamidah, Siti
IPTEK The Journal of Engineering Vol. 11 No. 2 (2025)
Publisher : Pusat Publikasi Ilmiah, Institut Teknologi Sepuluh Nopember.

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

Abstract

Kidney failure significantly impairs physiological functions, primarily due to the accumulation of urea in the bloodstream. When renal function drops below 75%, hemodialysis becomes a crucial therapeutic intervention. This study investigates the performance of a hollow fiber dialyzer, consisting of a shell-side dialysate flow, a semi-permeable membrane, and internal capillaries for blood flow. The main objective is to develop a theoretical model describing urea mass transfer through the membrane during hemodialysis. The analysis focuses on the effect of blood flow rate on urea concentration distribution across the tube, membrane, and shell regions in both axial and radial directions. Additionally, the influence of membrane length and dialysate flow rate on urea clearance is examined. Simulation results indicate that higher blood flow rates lead to elevated urea concentrations at the tube outlet, suggesting reduced diffusion into the dialysate compartment. In contrast, increasing membrane length enhances urea clearance. Interestingly, the dialysate flow rate shows minimal impact on clearance efficiency. Under a fixed dialysate flow rate of 500 mL/min and a membrane length of 27 cm, the calculated urea clearance values were 21.95%, 17.06%, 14.31%, and 12.52% for blood flow rates of 200, 300, 400, and 500 mL/min, respectively.
Co-Authors Aisyah Alifatul Zahidah Rohmah Al Wafi Rahmaputri Ardianingrum Ali Altway Apriliani, Eltigeka Devi Arofah, Rosyida Nofiana Fadlilatul Taufany Fahmi Fauziah, Melinda Nur Larasati, Wahyu Adinda Megasari, Gabrilla Ulfa Meka, Wahyu Nailah, Rossesari Ni’mah, Hikmatun Pamungkas, Raditya Purwanto, Belinda Kezia Rachmaniah, Orchidea Rahmah, Annisa Alifia Rahmawat, Yeni Rifai, Muhammad Ayub Sari, Citra Yulia Susianto Susianto Susianto Tirta, Anggi Tri Widjaja Virdiansyah, Wahyu Fiqih Wardhono, Endarto Yudo Widyasti, Lintang Dian Yeni Rahmawati, Yeni