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All Journal Jurnal Teknik ITS Eksergi: Chemical Engineering Journal Seminar Nasional Teknik Kimia Kejuangan Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Jurnal Pengabdian Kepada Masyarakat Patikala Aptekmas : Jurnal Pengabdian Kepada Masyarakat Formosa Journal of Applied Sciences (FJAS) Dharma: Jurnal Pengabdian Masyarakat
Nyamiati, Retno Dwi
Department Of Chemical Engineering, Faculty Of Industrial Engineering, Yogyakarta Veteran National Development University
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A Critical Review of Carbonization Hydrothermal and Pyrolysis for Adsorbent Production and the Application in Industrial Dye Removal Nyamiati, Retno Dwi; Putri Restu Dewati; Muhammad Redo Ramadhan; Ika Wahyuning Widiarti; A Hidayat Nurwahid; Nabila Aulia Balqis
Eksergi Vol 22 No 2 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i2.14742

Abstract

Biochar is increasingly recognised as a low-cost and efficient adsorbent for removing organic dyes from wastewater. This review outlines recent developments in biochar production, particularly comparing biochars produced via pyrolysis and hydrothermal carbonisation (HTC). While pyrolysis biochar often exhibits a higher surface area, HTC biochar offers improved oxygen-containing functional groups, contributing to enhanced dye affinity. Studies indicate that biochar can achieve adsorption capacities ranging from 2 to 1353.09 mg/g for dyes such as methylene blue and crystal violet, comparable to or exceeding that of pyrolysis-derived biochars. The review also highlights characterisation techniques such as XRD, FTIR spectroscopy, and SEM to evaluate surface functionality, porosity, and morphology, which directly influence adsorption performance. Practical implications include the suitability of HTC biochar for low-energy, decentralised wastewater treatment systems, particularly in textile and dyeing industries. By connecting production parameters with biochar properties, this review provides insights into optimizing biochar as an adsorbent, particularly for the treatment of dye-contaminated wastewater.
Inovasi pewarnaan ramah lingkungan dan integrasi multiplatform berbasis digital untuk penguatan UMKM kerajinan alam Pradana, Musthofa Galih; Pinastawa, I Wayan Rangga; Nyamiati, Retno Dwi; Wiryanto, Fadhli Suko; Budi, Ryan Setya; Arifuddin, Nurul Afifah; Adrezo, Muhammad; Niqotaini, Zatin
Jurnal Pembelajaran Pemberdayaan Masyarakat (JP2M) Vol. 6 No. 4 (2025)
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jp2m.v6i4.24154

Abstract

Kawasan Industri Sentolo menjadi lokasi strategis bagi UMKM Jangkang Indah Craft, yang memproduksi kerajinan serat agel,  sumber daya alam yang ada di Kulon Progo. Pada tahun 2025, usaha ini menghadapi tantangan utama berupa persiapan pemasaran internasional secara mandiri, dan penggunaan pewarna ramah lingkungan pada produksi untuk keberlanjutan ekosistem yang lebih baik dan tidak menimbulkan efek ekologis yang signifikan. Untuk menjawab hal tersebut, program Pengabdian Masyarakat dilaksanakan dengan tujuan dapat memberikan pemahaman baru dalam mengelola UMKM secara menyeluruh. Kegiatan berupa sosialisasi, pendampingan dan praktek langsung pada aspek: persiapan manajemen pemasaran dengan pelatihan digital marketing menggunakan website dan platform e‑Bay. Selain itu dilakukan praktek dan pendampingan langsung melakukan pewarnaan ramah lingkungan seperi menggunakan spirulina untuk warna hijau dan ekstrak warna kuning dengan kadar kimia yang lebih rendah lebih ramah lingkungan. Pendampingan teknis dilakukan selama 3 kal dengan hasil evaluasi melalui kuesioner menunjukkan rata‑rata kepuasan peserta sebesar 4,27 (skala 1‑5), mengindikasikan penilaian berada pada skala baik. Hal ini juga selaras dengan peningkatan yang sudah terjadi dalam pendampingan sebelumnya, dimana pembuatan website dapat membangun branding awal yang baik, terbukti beberapa kemitraan sudah terjalin berkat kemudahan akses informasi pada UMKM.
A State of the Art Review For Removing Heavy Metals Resulting from Industrial Waste Nyamiati, Retno Dwi; Setyaningtyas, Wiji Asih; Arstyanto, Dimas
Formosa Journal of Applied Sciences Vol. 3 No. 6 (2024): June 2024
Publisher : PT FORMOSA CENDEKIA GLOBAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55927/fjas.v3i6.9604

Abstract

The contamination of heavy metals has become a serious concern for both the government and researchers due to industrial waste. Heavy metals possess toxic properties that can harm the human body if exposed over an extended period. It cannot be denied that toxic heavy metals come in various types, such as Ag (argentum), Cd (cadmium), Cr (chromium), Cu (cuprum), Ni (nickel), and others. In its development, various methods have been implemented to eliminate heavy metal waste, encompassing both conventional and modern approaches. Researchers are actively seeking the most efficient and effective method to address the issue of heavy metal removal. This review focuses on different methods for handling heavy metal waste, measuring the percentage of heavy metal loss to determine which method is the most effective and efficient in heavy metal removal.
Effect of Cycling and Washing in Fouling Level from Theaflavin Filtration on Ultrafiltration Membrane Nyamiati, Retno Dwi; Yulianto, Mohamad Endy; Nanda, Dodi Eko; Diwiyanto, Yusron Mahendra
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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

Abstract

Ultrafiltration membranes, characterized by their molecular weight cutoff ranging from 50 to 100 kDa, are extensively employed for the filtration of macromolecules including suspended solids, carbohydrates, proteins, and various other components. However, the prolonged usage of these membranes leads to a notable decline in their performance due to fouling. Membrane fouling entails the accumulation of filtered foulant media and the formation of deposits, adversely impacting the filtration efficiency. This study focuses on evaluating the impact of repeated filtration cycles on membrane fouling and investigates the effectiveness of membrane washing in restoring membrane performance. The ultrafiltration membrane was subjected to five consecutive repetition cycles using theaflavin as the filtration media. The observed flux exhibited a substantial decline of 87%, decreasing from an initial value of 0.0574 L/m2.hr to 0.0073 L/m2.hr. To mitigate fouling and enhance membrane performance, a thorough washing process was carried out. Following the washing procedure, the flux was found to increase to 0.034 L/m2.hr, indicating a significant improvement in the membrane's performance. These findings are further supported by the morphological analysis of the membrane using Scanning Electron Microscope (SEM) photographs, which reveal the distinct differences between the membrane's morphology before and after washing.
Effect of Chitosan-TiO2 Membrane Performance for the Degradation of Batik Waste with a Photocatalytic Hybrid System Nyamiati, Retno Dwi; Timotius, Daniel; Sri Rahmawati, Septi Sri; Carissavila, Calista; Amalia, Noor
Eksergi Vol 21 No 1 (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.v21i1.10734

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.
Co-Authors A Hidayat Nurwahid Alfathony Krisnabudhi Arnesya Ramadhani Arstyanto, Dimas Bambang Sugiarto Bambang Sugiarto Budi, Ryan Setya Carissavila, Calista Daniel Timotius Desty Arista Dian Purnami Handayani Diwiyanto, Yusron Mahendra Dodi Eko Nanda Dwi Amalia Fadhli Suko Wiryanto Heri Septya Kusuma I Wayan Rangga Pinastawa Ika Wahyuning Widiarti Kusuma, Heri Septya Mahreni Mahreni Mega Mustikaningrum Mohamad Endy Y Yulianto Muhamad Ridwan Muhammad Adrezo Muhammad Redo Ramadhan Musthofa Galih Pradana Nabila Aulia Balqis Nanda, Dodi Eko Niqotaini, Zatin Noor Amalia Nurhuda Maulana Nurkhamidah, Siti Nurul Afifah Arifuddin Putri Restu Dewati Septi Sri Rahmawati Setyaningtyas, Wiji Asih Siti Nurkhamdah Sonya Hakim Raharjo Suranto Suranto Suranto Timotius, Daniel Wahyu Meka Yeni Rahmawati, Yeni