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All Journal Jurnal Ilmiah Edunomika (JIE) INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY
Ridwan, Irwan
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science

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INVESTIGATING FLY ASH-BOTTOM ASH-SOIL COMPOSITE AS SUSTAINABLE LINERS FOR URBAN LANDFILLS: GEOTECHNICAL AND ADSORPTION ASSESSMENT Sari, Kartika; Ridwan, Irwan; T. Lando, Asiyanthi; Nur, Sitti Hijraini; Zayarati, Mehdi Tanha
INDONESIAN JOURNAL OF URBAN AND ENVIRONMENTAL TECHNOLOGY VOLUME 8, NUMBER 2, OCTOBER 2025
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/urbanenvirotech.v8i2.24117

Abstract

This study investigates the combination of Fly Ash (FA), Bottom Ash (BA), and Soil (S) as a potential bottom liner in landfills. It is expected to cover the need for sustainable environmental technology, maintain structural strength, and prevent heavy metal pollution in rapidly urbanizing areas, while considering problems related to urban waste management. Aim: Evaluate FABA-Soil mixture as an alternative bottom liner material in landfill by assessing geotechnical performance and Cadmium (Cd) adsorption capacity. Methodology and results: The research explores two issues: mechanical stability (specific gravity, void ratio, compaction, and permeability) and mitigating Cadmium contamination from landfill leachate. Four mixture compositions (FBS1-FBS4), 15%, 30%, 50%, and 65% FABA content, were tested. Laboratory tests are conducted, including compaction, permeability, and adsorption continuous column tests. The results showed that intermediate FABA content (FBS2 and FBS3) may have stronger mechanical stability compared to others. For permeability, all values exceeded the regulatory standard. In the case of adsorption capacity, all compositions effectively removed Cd from the leachate. Conclusion, significance, and the impact study: Results on void ratio (e) and maximum dry density (MDD) suggested that a suitable mixture design may enhance long-term mechanical performance under a normal urban landfill loading situation. The FABA-soil mixture shows promise as an alternative landfill liner in moderate proportions and demonstrates excellent adsorption of heavy metals. All the attributes support general objectives of sustainable urban development and circular resource management, align with sustainable cities and communities, and responsible consumption and production.  
PENGARUH CUSTOMER RELATIONSHIP MANAGEMENT (CRM), KUALITAS PRODUK DAN CORPORATE IMAGE TERHADAP KEPUASAN PELANGGAN DENGAN KUALITAS LAYANAN SEBAGAI PEMODERASI (Studi Pada Pelanggan Potensial Tegangan Menengah (TM) di PT. PLN (Persero) UP3 Makassar Utara) Ridwan, Irwan
JURNAL ILMIAH EDUNOMIKA Vol. 9 No. 4 (2025): EDUNOMIKA
Publisher : ITB AAS Indonesia Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29040/jie.v9i4.18432

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh customer relationship management (crm), kualitas produk dan corporate image terhadap kepuasan pelanggan dengan kualitas layanan sebagai pemoderasi pada pelanggan potensial tegangan menengah (tm) di pt. pln (persero) up3 makassar utara. Penelitian ini menggunakan metode penelitian kuantitatif. Data yang diperoleh dianalisis menggunakan statistik deskriptif atau inferensial sehingga dapat disimpulkan hipotesis. Hasil penelitian menunjukkan bahwa variabel Costumer Relationship Management (CRM), variabel Kualitas Produk, dan variabel Corporate Image berpengaruh positif dan signifikan terhadap Kepuasan Pelanggan. Selain itu, penelitian ini juga menunjukkan bahwa Peran Moderasi Kualitas Layanan dalam Hubungan Kualitas Peran Moderasi Kualitas Layanan dalam Hubungan CRM dan Kepuasan Pelanggan Kualitas layanan memoderasi pengaruh Customer Relationship Management (CRM) terhadap kepuasan pelanggan potensial Tegangan Menengah di PT PLN (Persero) UP3 Makassar Utara (H4 diterima)Produk dan Kepuasan Pelanggan Kualitas layanan memoderasi pengaruh kualitas produk terhadap kepuasan pelanggan potensial Tegangan Menengah di PT PLN (Persero) UP3 Makassar Utara (H5 diterima), peran Moderasi Kualitas Layanan dalam Hubungan Corporate Image dan Kepuasan Pelanggan Kualitas layanan memoderasi pengaruh corporate image terhadap kepuasan pelanggan potensial Tegangan Menengah di PT PLN (Persero) UP3 Makassar Utara (H6 diterima).
Co-Authors Kartika Sari Sitti Hijraini Nur T. Lando, Asiyanthi Zayarati, Mehdi Tanha