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All Journal Eksergi: Chemical Engineering Journal Finger : Jurnal Ilmiah Teknologi Pendidikan
Sri Wahyu Murni
Program Studi Teknik Kimia, FTI, UPN ”Veteran” Yogyakarta Jl SWK 104 Lingkar Utara Condongcatur Yogyakarta 55283
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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Kinetika Adsorpsi Ion Zn Menggunakan Serbuk Gergaji Kayu Jati (Tectona grandis) Teraktivasi EDTA dalam Air Limbah Batik Kayu Sulistyawati, Endang; Firdaus, Septia Citra Rosa; Safitri, Meliyana; Murni, Sri Wahyu
Eksergi Vol 21, No 2 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i2.12303

Abstract

Limbah cair yang dihasilkan kerajinan batik kayu mengandung ion logam berat Zn2+ sebesar 7,6188 mg/L. Nilai tersebut melebihi batas yang diperbolehkan sehingga berpotensi mencemari lingkungan dan berbahaya bagi kesehatan. Penelitian ini bertujuan mengetahui kemampuan serbuk gergaji kayu jati teraktivasi EDTA sebagai adsorben ion logam Zn2+ dengan meninjau kinetika adsorpsi. Adsorben teraktivasi digunakan untuk adsorpsi Zn2+ dengan variasi waktu kontak (5-60 menit) dan suhu (30-55 °C). Identifikasi gugus fungsi adsorben dilakukan menggunakan Fourier Transform Infrared (FTIR) sedangkan kadar Zn2+ yang terjerap diuji menggunakan Atomic Absorption Spectrophotometry (AAS). Kondisi optimal terjadi pada suhu 45°C dan waktu kontak 45 menit dengan konsentrasi ion logam Zn setelah adsorpsi 4,812 mg/L dan nilai kapasitas adsorpsi 1.2806 mg/g. Hasil tersebut menunjukkan kelayakan larutan sampel setelah proses adsorpsi sebagai air hygiene sanitasi. Analisis kinetika adsorpsi menunjukkan bahwa proses ini mengikuti model kinetika Lagergren orde dua semu dengan persamaan konstanta laju adsorpsi k = 1,527x105 exp (-4592,5/T) (g/mg.mnt) dengan nilai energi aktivasi 38,182 kJ/mol yang menunjukkan bahwa adsorpsi terjadi secara fisisorpsi. Hasil ini memberikan pemahaman mekanisme adsorpsi logam Zn menggunakan serbuk gergaji kayu jati teraktivasi EDTA yang dapat digunakan sebagai dasar pengembangan metode pengelolaan limbah yang efektif.
Penggunaan Sekresi Kutu Lak pada Pembuatan Biokomposit dari Sabut Kelapa Hermawan, Axel Adam; Ariesta, Axl; Ilcham, Adi; Murni, Sri Wahyu
Eksergi Vol 18, No 2 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4566

Abstract

Nowadays, biocomposite materials are required for particular needs. Coconut husk has a potential to be biocomposite using a resin produced by the laccifer lacca kerr (kerria lacca), an insect. This work was aimed to study the use of the lacca kerr resin to produce a biocomposite of coconut coir based. In the experimental, firstly, the cleaned coconut husks were chopped then mixed with lacca kerr resin and alcohol to make a composite dough. Then the dough were pressed with 130 psig at a 100oC within15 minutes. After that, the biocomposite was allowed to ambient temperature, then it properties were observed. To find the best product properties, the ratio of basic materials were varied. The ratio of coconut husk: lacca kerr resin was used ranged from 0.6 g/mL to 1.4 g/mL. The characterization of product properties were carried out based on ASTM D-638 and under guidance of the Indonesian National Standard (SNI) 03-2105-2006. Based on results, it was found that the best biocomposite observed had properties such as density of 0.45 g/cm3 , water content of 8.8% (maximum SNI requirement of 14%), degree of swelling of 67.6%, tensile strength of 43.4 kgf / cm2 (minimum SNI requirement of 3, 1 kgf / cm2 ), Young's modulus of 1219.2 kgf/cm2 , elongation of 67.7%, conductivity of 1.8 10-8 /.m. Some of these characteristics have met the Indonesian national standard (SNI).
Penggunaan Sekresi Kutu Lak pada Pembuatan Biokomposit dari Sabut Kelapa Hermawan, Axel Adam; Ariesta, Axl; Ilcham, Adi; Murni, Sri Wahyu
Eksergi Vol 18 No 2 (2021)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v0i0.4566

Abstract

Nowadays, biocomposite materials are required for particular needs. Coconut husk has a potential to be biocomposite using a resin produced by the laccifer lacca kerr (kerria lacca), an insect. This work was aimed to study the use of the lacca kerr resin to produce a biocomposite of coconut coir based. In the experimental, firstly, the cleaned coconut husks were chopped then mixed with lacca kerr resin and alcohol to make a composite dough. Then the dough were pressed with 130 psig at a 100oC within15 minutes. After that, the biocomposite was allowed to ambient temperature, then it properties were observed. To find the best product properties, the ratio of basic materials were varied. The ratio of coconut husk: lacca kerr resin was used ranged from 0.6 g/mL to 1.4 g/mL. The characterization of product properties were carried out based on ASTM D-638 and under guidance of the Indonesian National Standard (SNI) 03-2105-2006. Based on results, it was found that the best biocomposite observed had properties such as density of 0.45 g/cm3 , water content of 8.8% (maximum SNI requirement of 14%), degree of swelling of 67.6%, tensile strength of 43.4 kgf / cm2 (minimum SNI requirement of 3, 1 kgf / cm2 ), Young's modulus of 1219.2 kgf/cm2 , elongation of 67.7%, conductivity of 1.8 10-8 /.m. Some of these characteristics have met the Indonesian national standard (SNI).
Kinetika Adsorpsi Ion Zn Menggunakan Serbuk Gergaji Kayu Jati (Tectona grandis) Teraktivasi EDTA dalam Air Limbah Batik Kayu Sulistyawati, Endang; Firdaus, Septia Citra Rosa; Safitri, Meliyana; Murni, Sri Wahyu
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.v21i2.12303

Abstract

Limbah cair yang dihasilkan kerajinan batik kayu mengandung ion logam berat Zn2+ sebesar 7,6188 mg/L. Nilai tersebut melebihi batas yang diperbolehkan sehingga berpotensi mencemari lingkungan dan berbahaya bagi kesehatan. Penelitian ini bertujuan mengetahui kemampuan serbuk gergaji kayu jati teraktivasi EDTA sebagai adsorben ion logam Zn2+ dengan meninjau kinetika adsorpsi. Adsorben teraktivasi digunakan untuk adsorpsi Zn2+ dengan variasi waktu kontak (5-60 menit) dan suhu (30-55 °C). Identifikasi gugus fungsi adsorben dilakukan menggunakan Fourier Transform Infrared (FTIR) sedangkan kadar Zn2+ yang terjerap diuji menggunakan Atomic Absorption Spectrophotometry (AAS). Kondisi optimal terjadi pada suhu 45°C dan waktu kontak 45 menit dengan konsentrasi ion logam Zn setelah adsorpsi 4,812 mg/L dan nilai kapasitas adsorpsi 1.2806 mg/g. Hasil tersebut menunjukkan kelayakan larutan sampel setelah proses adsorpsi sebagai air hygiene sanitasi. Analisis kinetika adsorpsi menunjukkan bahwa proses ini mengikuti model kinetika Lagergren orde dua semu dengan persamaan konstanta laju adsorpsi k = 1,527x105 exp (-4592,5/T) (g/mg.mnt) dengan nilai energi aktivasi 38,182 kJ/mol yang menunjukkan bahwa adsorpsi terjadi secara fisisorpsi. Hasil ini memberikan pemahaman mekanisme adsorpsi logam Zn menggunakan serbuk gergaji kayu jati teraktivasi EDTA yang dapat digunakan sebagai dasar pengembangan metode pengelolaan limbah yang efektif.
Students' Perception of Islamic Movies as an Instructional Media to Improve English Speaking Ability Murni, Sri Wahyu; Sujarwati, Iis; Rianyansa, Ari Andre
FINGER : Jurnal Ilmiah Teknologi Pendidikan Vol. 4 No. 3 (2025): Finger : Jurnal Ilmiah Teknologi Pendidikan November 2025
Publisher : CV. Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/finger.v4i3.540

Abstract

Background: One of the most crucial language skills for learning English is speaking. Therefore, this study offers a different focus because it focuses on the students’ perceptions of and obstacles in using Islamic movies in English speaking class. this study is different from earlier research since a lot of current research uses classroom action research and quasi-experimental research. This study also differs from previous research that employed descriptive quantitative methods.Aims: The purpose of this study is to ascertain students' opinions regarding the use of Islamic movies as a teaching tool to enhance English speaking proficiency as well as the challenges associated with it.Methods: This study was carried out using a mixed-methods design. Purposive sampling was the sampling method used as a result. The interview and questionnaire were used as tools to address the study questions. The total population was 30 students from tenth grade. Only class A (30 students) was used as the sample for this study.Results: The findings indicated that the use of Islamic movies in English-speaking lessons was well received by the students. Some students, however, had various challenges when using it to speak English. These challenges included inadequate internet access, lacking elements in Islamic movies, language proficiency, and mental health issues.Conclusion: The researcher came to the conclusion that Hidayatul Mubtadi'ien Islamic Boarding School can effectively enhance English speaking skills through the use of Islamic movies.
Co-Authors Adi Ilcham Ariesta, Axl Endang Sulistyawati Firdaus, Septia Citra Rosa Hermawan, Axel Adam Iis Sujarwati Rianyansa, Ari Andre Safitri, Meliyana