Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Envirotek : Jurnal Ilmiah Teknik Lingkungan Jejak digital: Jurnal Ilmiah Multidisiplin
Ibrahim
Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mulawarman, Samarinda, Kalimantan Timur
Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Social Sciences Other

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Pengaruh Waktu Kontak serta Jenis Elektroda Al-Al dan Al-Fe pada Elektrokoagulasi dalam Penyisihan Fe dan Mn Air Asam Tambang Andini Adi Putri; Ika Meicahayanti; Searphin Nugroho; Ibrahim; Febrina Zulya
Envirotek : Jurnal Ilmiah Teknik Lingkungan Vol. 15 No. 2 (2023): Envirotek: Jurnal Ilmiah Teknik Lingkungan
Publisher : Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/envirotek.v15i2.272

Abstract

Kandungan besi (Fe) dan mangan (Mn) dalam air asam tambang perlu diperhatikan agar tidak berpotensi sebagai zat pencemar di badan air penerima. Elektrokoagulasi dapat digunakan sebagai alternatif untuk penurunan logam dalam air limbah. Penelitian ini dilakukan dengan menganalisis pengaruh jenis elektroda dan waktu kontak pada metode elektrokoagulasi menggunakan plat aluminium (Al) dan besi (Fe), sehingga dapat mengetahui efektivitas metode elektrokoagulasi dalam mengolah air asam tambang. Penelitian dilakukan dengan variasi waktu kontak selama 45, 90, 120, 150, 180 menit dan jenis plat Al-Al dan Al-Fe. Hasil penelitian menunjukkan bahwa kenaikan waktu kontak diikuti dengan kenaikan efektifitas penyisihan parameter besi (Fe) dan mangan (Mn) pada air asam tambang. Jenis plat Al-Al lebih efesien dibandingkan jenis plat Al-Fe dikarenakan pada kombinasi Al-Al flok yang terbentuk lebih banyak. Jenis plat aluminum (Al-Al) pada waktu kontak 180 menit merupakan variasi yang paling efektif untuk pengolahan air asam tambang dengan hasil penyisihan parameter besi (Fe) sebesar 100% dari konsentrasi awal 1,25 mg/L dan penyisihan kadar mangan (Mn) sebesar  96% dari konsentrasi awal 2,58 mg/L.
Pengaruh Keterlibatan Pegawai dan Pengembangan Karir Terhadap Loyalitas Pegawai Badan Kesatuan Bangsa dan Politik Kutai Timur Ibrahim Ibrahim; Djoko Setyadi; Purwinahyu Purwinahyu
Jejak digital: Jurnal Ilmiah Multidisiplin Vol. 2 No. 3 (2026): MEI 2026
Publisher : INDO PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63822/14r3fy88

Abstract

This study aims to analyze the influence of employee engagement and career development on employee loyalty at the National Unity and Politics Agency (Kesbangpol) of East Kutai Regency. The research background is grounded in the dynamics of employment status transitions from Regional Contract Workers (TK2D) to Government Employees with Work Agreements (P3K), which significantly affected career expectations and work engagement levels in local government institutions. A quantitative approach with descriptive and inferential statistical design was employed. The population and sample consisted of all 61 employees of Kesbangpol East Kutai using total sampling (census) technique. Data were collected through a Likert scale questionnaire (1–5) and analyzed using multiple linear regression, partial t-test, and simultaneous F-test, preceded by classical assumption tests including normality, multicollinearity, autocorrelation, and heteroscedasticity. Results showed: (1) employee engagement had a positive and significant effect on employee loyalty (t = 2.026; sig. = 0.047); (2) career development had a positive and significant effect on loyalty (t = 4.435; sig. = 0.000); (3) simultaneously, both variables significantly affected employee loyalty (F = 26.958; sig. = 0.000) with a contribution of 48.2% (R² = 0.482). These findings confirm that strengthening employee engagement through empowerment and participatory work, alongside developing a transparent and equitable career system, are key strategies for building employee loyalty in local government institutions.
Co-Authors Andini Adi Putri Djoko Setyadi Febrina Zulya Meicahayanti, Ika Purwinahyu Purwinahyu Searphin Nugroho