Article Per Year (5 Year)
p-Index From 2019 - 2024
0.23
P-Index
This Author published in this journals
All Journal Jurnal Aplikasi Manajemen dan Bisnis (JAMB) Jurnal Elemen Kimia
Muhammad Rizki Romadhon
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance

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

Found 2 Documents
Search

 1 
Effect of Work Environment and Work Stress on Employee Performance Mailani Rabiulkhri; Tati Herlina; Nourma Wulandari; Riki Adriant; Muhammad Rizki Romadhon
Jurnal Aplikasi Manajemen dan Bisnis Vol. 3 No. 1 (2022): Jurnal Aplikasi Manajemen dan Bisnis Oktober 2022
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.7260678

Abstract

The data analysis technique used is Multiple Linear Regression. Based on the results of the partial analysis there is a significant effect of the work environment on employee performance at PT. Baturaja Cellular Multi Media with a t value of 3,413. Work stress variable has a significant effect on employee performance at PT. Baturaja Cellular Multi Media with a t value of 5,108. Simultaneously, it was found that there was an effect of work environment and work stress on employee performance at PT. Baturaja Cellular Multi Media with a calculated F value of 58,675. The coefficient of determination (R2) obtained is 0.741. This shows that the contribution of the influence of the work environment and work stress on employee performance is 74.1% while the remaining 25.9% is influenced by other variables not mentioned in this study such as intellectual ability, work discipline, job satisfaction, and employee motivation.
EFEKTIVITAS JENIS KOAGULAN DAN DOSIS KOAGULAN TEHADAP PENURUNAN KADAR KROMIUM LIMBAH PEYAMAKAN KULIT Muhammad Rizki Romadhon; Sunarto Sunarto
Jurnal Elemen Kimia Vol 6, No 1 (2017): Volume 6 No 1 Tahun 2017
Publisher : Universitas Negeri Yogyakarta

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

Abstract

Tujuan penelitian ini ialah: 1) Menentukan koagulanterefektif untuk mengkoagulasi ion logam kromium; 2)Menentukan pH koagulan terefektif untuk mengkoagulasi ionlogam kromium; dan 3) Menentukan dosis koagulan terefektifuntuk mengkoagulasi ion logam kromium.Penelitian dilakukandengan mencampurkan larutan koagulan dengan sampel limbahkromium. Variabel bebas yang digunakan pada penelitian iniialah jenis koagulan, pH, dan dosis koagulan. Koagulan yangdigunakan aluminium sulfat, besi(II) sulfat dan poly aluminiumklorida (PAC). Pada penentuan koagulan terefektif, pH diaturberturut-turut untuk aluminium sulfat, PAC, dan besi(II) sulfatialah 6, 8, dan 10. pH tersebut didapatkan berdasarkan studipustaka. Selanjutnya, koagulan terefektif ditentukan pHterefektif koagulasi. Variasi pH yang digunakan ialah 8, 9, dan10. Terakhir, koagulan terefektif dan pH terefektif ditentukandosis koagulan terefektif dalam koagulasi. Variasi dosiskoagulan yang digunakan ialah 250 ppm, 300 ppm, 350 ppm,400 ppm, 450 ppm, dan 500 ppm. Efektivitas koagulasi padapenentuan koagulan terefektif ialah: aluminium sulfat 96,87%;PAC 98,37%; dan besi(II) sulfat 99,4%. Besi(II) sulfatmerupakan koagulan terefektif. Efektivitas koagulasi padapenentuan pH terefektif besi(II) sulfat ialah: pH 8 90,42%; pH 997,47%; dan pH 10 96,61%. Efektivitas koagulasi padapenentuan dosis koagulan terefektif besi(II) sulfat ialah: 250ppm95,58%; 300 ppm 96,49%; 350 ppm 97,22%; 400 ppm 97,95%;450 ppm 100%; dan 500 ppm 100%.
Co-Authors Mailani Rabiulkhri Nourma Wulandari Riki Adriant Sunarto Sunarto Tati Herlina