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All Journal KURVATEK Dinasti International Journal of Education Management and Social Science
Novita Sari, Eva
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Social Sciences

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Factors Affecting Employee Loyalty at PT. Permodalan Nasional Madani Tangerang Branch Novita Sari, Eva; Agus Salim
Dinasti International Journal of Education Management And Social Science Vol. 4 No. 5 (2023): Dinasti International Journal of Education Management and Social Science (June
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31933/dijemss.v4i5.1908

Abstract

This study aims to analyze the effect of service quality provided, the effect of service quality on employee satisfaction, the effect of service quality on employee loyalty mediated by employee satisfaction and the effect of employee satisfaction on employee loyalty at PT. Permodalan Nasional Madani Tangerang Branch. With the number of samples in this study 125 respondents. From the results of the analysis that has been carried out, the results show that service quality has a positive effect on employee loyalty with an original sample estimate (O) value of 0.348, service quality has a positive effect on employee satisfaction with an original sample estimate (O) value of 0.825, employee satisfaction has a positive effect on loyalty employee original sample estimate (O) value of 0.506, and service quality has a positive effect on employee loyalty mediated by employee satisfaction showing an original sample estimate (O) value of 0.417 so that the four hypotheses can be accepted.
Efektivitas Biokoagulan Cangkang Telur dan Kulit Pisang dalam Menurunkan TSS pada Air Limbah Tambang Batubara Novita Sari, Eva; Muryani, Eni; Algary, Tissia Ayu; Anasstasia, Titi Tiara; Yogafanny, Ekha
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.6196

Abstract

Industri pertambangan batubara menghasilkan limbah cair yang berpotensi mencemari lingkungan. Hasil analisis air limbah tambang batubara di PT Mifa Bersaudara menunjukkan parameter pH, Fe, dan Mn sudah sesuai baku mutu. Namun, kadar Total Suspended Solid (TSS) masih melebihi batas yang ditetapkan. Penelitian ini bertujuan untuk menganalisis kualitas awal air limbah tambang batubara serta menganalisis efektivitas cangkang telur dan kulit pisang sebagai biokoagulan alami dalam menurunkan TSS. Metode penelitian meliputi pengambilan sampel di Water Monitoring Point (WMP) 13, uji laboratorium dengan jar test, variasi dosis koagulan (cangkang telur 0-5 g/L, kulit pisang 0-2 g/L) dan waktu sedimentasi (30, 60, 90 menit). Hasil menunjukkan bahwa dosis optimum cangkang telur 2 g/L pada waktu 30 menit dapat menurunkan TSS dari 489 mg/L menjadi 138 mg/L, sedangkan dosis kulit pisang 1 g/L dapat menurunkan TSS menjadi 181 mg/L. Pemanfaatan biokoagulan alami ini terbukti efektif dan berpotensi menjadi alternatif ramah lingkungan sebagai pengganti koagulan kimia. Kata kunci: Air Limbah Tambang, Biokoagulan, Cangkang Telur, Kulit Pisang, TSS
Co-Authors Agus Salim Algary, Tissia Ayu Anasstasia, Titi Tiara Ekha Yogafanny, Ekha Eni Muryani