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All Journal Jurnal IPTEK Journal of Applied Business and Technology
Setiawan, Yayat
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering Mechanical Engineering

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INCREASING EFFECT OF EMPLOYEE WORK ETHICS AND TRAINING ON EMPLOYEE PERFORMANCE AND SERVICE QUALITY AT PT XL AXIATA RIAU Setiawan, Yayat; Junaedi, Achmad Tavip; Chandra, Teddy
Journal of Applied Business and Technology Vol. 2 No. 3 (2021): Journal of Applied Business and Technology
Publisher : Institut Bisnis dan Teknologi Pelita Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.85 KB) | DOI: 10.35145/jabt.v2i3.76

Abstract

The quality of customer service in companies is often affected by ethics and poor employee performance, lack of employee training on the necessary skills. These challenges lead to companies losing customers, declining quality, and being criticized in terms of service, lack of morale which leads to low productivity and hinders the achievement of PT XL AXIATA's goals. This study aims to determine the effect of employee work ethics and employee training on customer service quality in the service department. In particular, with the main objective to determine the relationship between Employee Performance and Customer Service Quality at PT XL AXIATA, the mediation results of employee training and the influence on the relationship between Employee Performance and Customer Service Quality at PT XL AXIATA. As well as the combined effect of ethics and employee training on the quality of customer service at PT XL AXIATA. The author adopted a descriptive research design. This study uses quantitative methods. The type of data used in this study is primary data, which means that the data is obtained directly by the respondent. In this study, the distribution of questionnaires as many as 83 respondents. The test used to test is a research instrument in the form of validity test, reliability test and classical assumption test. From the results of data processing using the T test (partial) variable Ethics (X1), Employee Training (X2) Able to Influence Employee Performance (Y1) and Service Quality (Y2).
Synthesis of Zeolite from Coal Bottom Ash Using Hydrothermal Method as An Adsorbent for Heavy Metals Cd, Pb, Fe, and Cu Setiawan, Yayat; Bahrin, David; Komariah, Leily Nurul
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.7715

Abstract

This study aims to synthesize zeolite from coal combustion bottom ash using the hydrothermal method and evaluate its effectiveness in adsorbing heavy metals—specifically cadmium (Cd), lead (Pb), iron (Fe), and copper (Cu). Bottom ash was treated via alkali fusion at 750°C, followed by acid activation with 1 M HCl to extract silica and alumina. Zeolite synthesis was hydrothermal at 100°C with 6, 12, and 24 hours of crystallization. Sodium aluminate (NaAlO2) was added to adjust the Si/Al ratio and enhance structural stability. The synthesized zeolites were characterized using X-ray Fluorescence (XRF) and Scanning Electron Microscopy (SEM). The sample crystallized for 12 hours and exhibited the highest SiO2/Al2O3 ratio, measuring 3.73. Adsorption tests revealed optimal performance at pH 5–9 and 120 minutes contact time, achieving removal efficiencies of 97.84% for Pb2+, 99.47% for Cd2+, 99.73% for Fe2+, and 99.91% for Cu2+. These findings demonstrate that bottom ash-derived zeolite is a promising, low-cost adsorbent for heavy metal removal from wastewater. It supports use in sustainable and long-term industrial effluent treatment systems.
Co-Authors Achmad Tavip Junaedi David Bahrin Leily Nurul Komariah Teddy Chandra