Article Per Year (5 Year)
p-Index From 2021 - 2026
4.695
P-Index
This Author published in this journals
All Journal Jurnal Periodic Jurusan Kimia UNP Indonesian Journal of Chemistry Pelita Eksakta MASALIQ: Jurnal Pendidikan dan Sains SAINTI: Majalah Ilmiah Teknologi Industri Jurnal Pendidikan MIPA
Nizar, Umar Kalmar
Unknown Affiliation
Religion Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

Published : 35 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 35 Documents
Search

 1   2   3   4 
Penggunaan Karbon Daun Aren dan Bleaching Earth dalam Penjernihan Bertahap Minyak Jelantah Qalbi, Aura Dwi; Nizar, Umar Kalmar
MASALIQ Vol 6 No 5 (2026): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i5.11627

Abstract

Repeated use of cooking oil causes a decline in oil quality due to the formation of free fatty acids, polar compounds, and oxidation products. This study aimed to evaluate the effect of variations in the composition of sugar palm leaf carbon (Arenga pinnata) and bleaching earth on the quality of used cooking oil through an adsorption-based purification process. Sugar palm leaf carbon was obtained through carbonization at 300 °C for 1 hour and was then characterized using proximate analysis. The purification process was conducted using three adsorbent compositions, namely K75-B25, K50-B50, and K25-B75. Adsorption effectiveness was evaluated based on density, flow rate, acid value, and saponification value. The proximate analysis results showed that sugar palm leaf carbon had a moisture content of 4.49%, a volatile matter content of 2.20%, an ash content of 9.00%, and a fixed carbon content of 88.8%. All treatment variations improved the quality of used cooking oil compared with the untreated sample. The K75-B25 treatment demonstrated the best performance, with the lowest density of 0.9407 g/mL, the highest flow rate of 0.3227 mL/s, the lowest acid value of 4.8378 mg KOH/g, and the highest saponification value of 50.9149 mg KOH/g. These findings indicate that increasing the proportion of sugar palm leaf carbon resulted in greater adsorption effectiveness than increasing the proportion of bleaching earth. Thus, sugar palm leaf carbon combined with bleaching earth has the potential to be used as an alternative adsorbent to improve the physicochemical characteristics of used cooking oil through a purification process.
Efektivitas Campuran Karbon Kulit Umbi Talas (Colocasia esculenta) dan Bleaching Earth untuk Penjernihan Minyak Jelantah Meylani, Popy; Nizar, Umar Kalmar
MASALIQ Vol 6 No 5 (2026): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i5.11628

Abstract

Purification of used cooking oil is necessary to reduce the content of impurity compounds formed during repeated use so that the physicochemical quality of the oil can be improved. This study aimed to evaluate the effectiveness of a mixture of taro corm peel carbon (Colocasia esculenta) and bleaching earth as an adsorbent in the purification of used cooking oil. The carbon was prepared by carbonizing taro corm peel at 250 °C for 1 hour and was then combined with bleaching earth in five adsorbent compositions, namely K100, K75BE25, K50BE50, K25BE75, and BE100. The adsorption process was conducted using 5 g of adsorbent in 100 mL of used cooking oil with stirring at 200 rpm for 60 minutes at room temperature. The carbon characteristics were analyzed based on moisture content, ash content, and fixed carbon content, whereas the quality of the purified oil was evaluated based on acid value, saponification value, density, and flow rate. The characterization results showed that taro corm peel carbon had a moisture content of 2.93%, an ash content of 8.49%, and a fixed carbon content of 88.58%. Variations in adsorbent composition affected the quality of used cooking oil after purification, with the K50BE50 treatment demonstrating the best performance based on the lowest acid value and better saponification value, density, and flow rate than the other treatments. These findings indicate that a balanced composition of taro corm peel carbon and bleaching earth produced the most effective adsorption process. The combination of these two adsorbents has the potential to be developed as an effective, economical, and environmentally friendly biomass-based alternative adsorbent for improving the quality of used cooking oil.
Pembuatan Edible Film Berbasis Tapioka dengan Penambahan Gelatin dan Aplikasinya pada Kemasan Permen Komersial Kaltsum, Afiifah; Nizar, Umar Kalmar; Kurniawati, Desy
MASALIQ Vol 6 No 5 (2026): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i5.11945

Abstract

Commercial candies are generally packaged using conventional plastics that are difficult to degrade and may cause chemical compounds to migrate into food products. Meanwhile, tapioca has the potential to be developed as a raw material for edible films but is limited by its hydrophilic properties and low mechanical strength. This study aimed to produce a tapioca-based edible film with gelatin added as a structural reinforcement and to evaluate its physical and functional characteristics for commercial candy packaging applications. The edible film was produced by gelatinizing 5 g of tapioca in 100 mL of distilled water with the addition of 7.5 mL of glycerol and gelatin at concentrations of 1%, 2%, and 3% for formulations F1, F2, and F3, respectively, along with a control formulation without gelatin. The films were then cast and dried at 60 °C for 24 h. Characterization included testing moisture content, biodegradability through a seven-day soil burial test, swelling capacity, and functional groups using FTIR spectroscopy. The results showed that the moisture content increased with increasing gelatin concentration, ranging from 11.9% to 15.5%, and all formulations met the maximum threshold of 16% stipulated in SNI 06-3735-1995. The highest biodegradability was obtained for F3 at 81%, exceeding the threshold of more than 60% stipulated in SNI 7188.7:2016. Water absorption capacity also increased with increasing gelatin concentration, from 47.2% in the control formulation to 74.0% in F3. The FTIR spectra revealed amide I bands at 1643–1646 cm⁻¹ and amide II bands at 1542–1543 cm⁻¹ in all gelatin-containing samples, confirming the successful incorporation of gelatin into the tapioca matrix without disrupting the glycosidic bonds of starch. These findings indicate that the formulation containing 3% gelatin exhibited the highest biodegradability, although it also produced the greatest water absorption capacity. Overall, tapioca–gelatin-based edible films have the potential to be developed as a biodegradable alternative for candy packaging to support the reduction of plastic waste in small- and medium-scale food industries.
Formulasi Gel Hand Sanitizer Berbahan Lidah Buaya dan Jeruk Nipis serta Aktivitas Antibakterinya terhadap Escherichia coli Rahmi, Dinda Aulia; Nizar, Umar Kalmar; Kurniawati, Desy
MASALIQ Vol 6 No 5 (2026): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i5.11851

Abstract

The use of natural ingredient-based hand sanitizers represents an alternative approach to developing practical antiseptic preparations that may provide comfort to the skin. This study aimed to formulate hand sanitizer gels containing aloe vera gel (Aloe vera) and lime juice (Citrus aurantifolia) at several concentration variations and to evaluate their physical characteristics and antibacterial activity against Escherichia coli. The study employed a laboratory experimental method with four formulations, namely F0, F1, F2, and F3, which differed in the amounts of aloe vera gel and lime juice. The preparation evaluation included homogeneity, organoleptic characteristics, pH, and antibacterial activity. The results showed that all formulations remained in gel form throughout the observation period, with variations in color and aroma influenced by the addition of natural ingredients. The pH values of all formulations ranged from 5.0 to 5.5, namely 5.0 for F0, 5.1 for F1, 5.4 for F2, and 5.5 for F3. Antibacterial testing showed the growth of E. coli in F0, whereas no bacterial growth was visually observed in F1, F2, F3, or the positive control. Nevertheless, all formulations still exhibited slight clumping, and the antibacterial testing conducted remained qualitative. These findings indicate that the combination of aloe vera gel and lime juice has the potential to be developed as natural ingredients in hand sanitizer formulations. Quantitative antibacterial testing and further stability evaluation are required to confirm the effectiveness and quality of the preparations.
Pemanfaatan Karbon dari Kulit Nanas (Ananas comosus) untuk Penjernihan Minyak Jelantah Hasil Penggorengan Telur Gulung Machelvi, Nazahra; Nizar, Umar Kalmar
MASALIQ Vol 6 No 5 (2026): MASALIQ: Jurnal Pendidikan dan Sains
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i5.11867

Abstract

Although biomass has been widely utilized as an adsorbent for purifying used cooking oil, the use of pineapple peel carbon (Ananas comosus) as an adsorbent for used cooking oil from frying rolled eggs (MJTG) remains limited. This study aimed to analyze the effects of varying masses of pineapple peel carbon carbonized at 300°C (K-KBN) on the characteristics of MJTG. The study employed a quantitative approach with a laboratory experimental design by adding 1, 3, and 5 g of K-KBN to 100 mL of MJTG at 160°C for one hour. The characteristics of MJTG were analyzed based on density, flow rate, acid value, and saponification value, whereas the quality of K-KBN was determined through proximate analysis. The results showed that the addition of K-KBN reduced the acid value from 45.32 to 13.59 mg KOH/g, increased the flow rate from 1.5 to 3.0 mL/s, and increased the saponification value from 200 to 370 mg KOH/g. The lowest density of 0.48 g/mL was obtained with the addition of 3 g of K-KBN. The moisture and volatile matter contents of K-KBN were 7.15% and 14.36%, respectively, thereby meeting the requirements of SNI 06-3730-1995. Based on the acid value, flow rate, and saponification value, the addition of 5 g of K-KBN produced the best treatment. These findings indicate that pineapple peel carbon has the potential to serve as a natural and economical adsorbent for purifying used cooking oil while supporting the utilization of biomass waste as a value-added adsorbent material.
Co-Authors Afrilia, Yoni Agustin, Andre Althof, Hasnah Sausan Anjelia, Mariza Auzakiyah, Sabella Azzahra, Wenalda Hanifah Budhi Oktavia Charles Banon Danish, Mohammed Della Rosalynna Stiadi Deski Beri Desy Kurniawati Edi Nasra Ellizar ellizar Fadhila, Radhiatul Fika, Miva Hemalia Fitri Amelia Fitriani Fitriani Gusvita, Nola Hamid, Hairul Amani Abdul Hanafi, Muhammad Farhan Hapzi Ali Hardeli Hardeli Hary Sanjaya Ibrahim, Siti Fatimah Indang Dewata Ismail, Mohammad Luqman Istiqamah, Siti Sarah Izanel, Rezi Ananta Kaltsum, Afiifah Karmila, Aroma Karsa, Dion Randi Khaliq, Feni Kurnia Lubis, Amalia Putri Machelvi, Nazahra Meylani, Popy Miftahul Jannah Miftahul Khair Miftahurrahmi, Miftahurrahmi Minda Azhar Muhammad Farhan Mukhaiyar, Riki Novel, Dheo Shalsabilla Novela, Riana Novriansyah, Edo Nufuz, Dini Hayati Pernadi, Niza Lian Putra, Ananda Putri, Natasya Alya Putri, Yunisa Anugrah Qalbi, Aura Dwi R, Yoanatul Hasanah Rahadian Zainul Rahmi Rahmi Rahmi, Dinda Aulia Rahmi, Fathaniah Raviqa Rahmi, Maulidia Arsyta Riga, Riga Risma Sari, Risma Rizki, Suci Yulia Sabrina, Joya Sapawe, Norzahir Sari, Trisna Kumala Sherly Kasuma Warda Ningsih Sidik, Siti Munirah Sidiq, Aqil Marsya Simbolon, Ranita Sri Benti Etika Suryelita, Suryelita Syafri, Vanny Sofiana Syafriadi, Riko Veronita, Silvi Wulandari, Yolanda Yuliani, Amelinda Zalfa, Mila Hasna Zamanhuri, Norezatul Shahirah Ahmad Zulhendra, Zulhendra Zuyyina, Himla