Garuda - Garba Rujukan Digital

PROCESSING RICE HUSK WASTE INTO CHARCOAL AS A PLANT GROWING MEDIUM AND ORGANIC FERTILIZER: PENGOLAHAN LIMBAH SEKAM PADI MENJADI ARANG SEKAM SEBAGAI MEDIA TANAM TUMBUHAN DAN PUPUK ORGANIK Ida Hasmita; Eka Marya Mistar; Nadia Putri Mauliza; Muhammad
WISDOM : Jurnal Pengabdian Kepada Masyarakat Wisdom Vol. 2 No. 1 (2025): JPKM WISDOM 3, 2025
Publisher : PT. ROCE WISDOM ACEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.71275/wisdom.v2i1.54

Cot Puklat Village is a village located in Mukim Melayo where the rice farming profession is the main livelihood for the community. The extensive community rice fields in the village cause husk waste to accumulate after each harvest period, because the utilization of rice husk waste is still very minimal. This is the background for choosing the location of community service activities. This activity aims to socialize to the community about the utilization of rice husk waste into husk charcoal as organic fertilizer and plant media in Cot Puklat Village, Blang Bintang District, Aceh Besar Regency. The community service team (PkM) consists of five lecturers and 10 students majoring in Chemical Engineering, Universitas Serambi Mekkah. This training teaches the community to produce husk fertilizer from rice husk waste in order to provide benefits to the community in increasing the livelihood of the Cot Puklat village community. The community was very enthusiastic in participating in this community service activity. This activity is expected to be able to contribute and play an active role in creating a beautiful, beautiful, and healthy environment, especially in the Cot Puklat Village environment

Karakterisasi Adsorben dari Limbah Pelepah Kelapa Sawit Teraktivasi Natrium Hidroksida untuk Adsorpsi Mangan Sara, Titien; Mistar, Eka Marya
Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i1.17898

The use of heavy metals including manganese (Mn) in various industrial applications such as mining and metal processing has triggered water pollution and caused a negative impact on human health. This study aims to evaluate the adsorbent properties activated by sodium hydroxide from oil palm frond waste for Mn(II) adsorption from the water via a fixed-bed column at flow rates of 5, 10, and 15 mL/min. The morphology analysis exhibited high pore development in the adsorbent after the activation process using sodium hydroxide. Similar to the results of functional group analysis, the activated adsorbent indicated an increase in oxygen-containing functional groups that are beneficial aspects in the adsorption process. In the continuous adsorption applications, a flow rate of 5 mL/min presented an optimum adsorption capacity of 36.58 mg/g compared to flow rates of 10 mL/min and 15 mL/min: 28.94 mg/g and 22.07 mg/g, respectively. The findings of the present work denote the utility and effectiveness of oil palm frond waste as an eco-friendly raw material for the fabrication of adsorbent with relatively favorable properties for Mn(II) adsorption.

Karakterisasi Adsorben dari Limbah Pelepah Kelapa Sawit Teraktivasi Natrium Hidroksida untuk Adsorpsi Mangan Sara, Titien; Mistar, Eka Marya
Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v14i1.17898

The use of heavy metals including manganese (Mn) in various industrial applications such as mining and metal processing has triggered water pollution and caused a negative impact on human health. This study aims to evaluate the adsorbent properties activated by sodium hydroxide from oil palm frond waste for Mn(II) adsorption from the water via a fixed-bed column at flow rates of 5, 10, and 15 mL/min. The morphology analysis exhibited high pore development in the adsorbent after the activation process using sodium hydroxide. Similar to the results of functional group analysis, the activated adsorbent indicated an increase in oxygen-containing functional groups that are beneficial aspects in the adsorption process. In the continuous adsorption applications, a flow rate of 5 mL/min presented an optimum adsorption capacity of 36.58 mg/g compared to flow rates of 10 mL/min and 15 mL/min: 28.94 mg/g and 22.07 mg/g, respectively. The findings of the present work denote the utility and effectiveness of oil palm frond waste as an eco-friendly raw material for the fabrication of adsorbent with relatively favorable properties for Mn(II) adsorption.

Efektivitas Ekstrak Daun Kopasanda (Chromolaena Odorata L.) Sebagai Penangkal Efek Radikal Bebas Formulasi Tabir Surya Hikmah Ramadana Nasution; Ida Hasmita; Eka Marya Mistar
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Kopasanda (Chromolaena Odorata L.) is a plant that contains flavonoid compounds in it where these compounds can act as natural antioxidants. This study aims to see the effectiveness of kopasanda leaf extract as a free radical scavenger in sunscreen formulations. Currently, the need for skin care is increasing, where the level of skin brightness is one indicator of skin health. Skin color when exposed to UV rays will change even if left to be exposed continuously which is worse can cause cancer. Kopasanda leaves are studied to contain ingredients rich in flavonoids such as polyphenol compounds that have a role as antioxidants in warding off free radicals. In proving this, it is necessary to test the antioxidant activity with the DPPH method, as well as apply it as a lotion product. Kopasanda leaf extract with the addition of ethanol solvent with varying concentrations of kopasanda leaf extract additives of 1%, 3%, 5%, and 7% with stirring times of 30 minutes, 60 minutes, and 90 minutes. The results of the study on antioxidant activity without adding a concentration of 0 were 124,845 ppm and the antioxidant activity with the addition of a concentration of 5% and 7% were 117,230 ppm and 114,201 ppm.

Improved Physico-Mechanical Properties and Microstructure of Modified Kenaf Fiber Reinforced Composites Eka Marya Mistar; Muhammad Muhammad
ALCHEMY Jurnal Penelitian Kimia Vol 21, No 1 (2025): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.21.1.92620.64-71

This study examined the properties of chemically modified kenaf fiber using propionic anhydride as reinforcement in vinyl ester composites. The composites reinforced by unmodified and modified kenaf fibers were fabricated using 10, 20, 30, 40, and 50% (w/w) via a hand lay-up technique. This study’s characterization included water absorption, thickness swelling, tensile and flexural strengths, and morphological analyses. The optimum physical, mechanical, and morphological properties were observed from the composite with 40% modified kenaf fiber. The optimized composite showed a considerable enhancement in the water absorption, tensile strength, and flexural strength of 1.82%, 54.90 MPa, and 55.85 MPa, respectively. These findings were supported by the fracture morphology after the mechanical test, exhibiting an enhanced interfacial modified kenaf fiber-matrix bonding. The improved characteristics of the composite were ascribed to the impact of the modification process within the fiber-matrix structures. Modified kenaf fiber via propionylation can be applied as a reinforcement material in the vinyl ester matrix.

Title

Found 25 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 25 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 25 Documents
Search