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All Journal JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmu Ekonomi dan Bisnis (JUKONI)
Adam, Wahyu
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Economics, Econometrics & Finance Social Sciences

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Pengaruh Konsentrasi dan Waktu Kontak pada Adsorpsi Ion Logam Pb2+ Menggunakan Adsorben Xerogel dari Abu Terbang (Fly Ash) Adam, Wahyu; Nasra, Edi; Benti Etika, Sri; Alizar, Alizar
Jurnal Pendidikan Tambusai Vol. 9 No. 1 (2025)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v9i1.24847

Abstract

Ion timbal (II) merupakan ion berbahaya yang dihasilkan dari limbah industri dan sangat berbahaya bagi lingkungan. Metode yang dapat digunakan untuk mengatasi limbah logam timbal yaitu dengan metode adsorpsi. Pada penelitian ini adsorben yang digunakan yaitu xerogel yang disintesis dari abu terbang (fly ash). Tujuan penelitian ini untuk menentuan kondisi optimum dan kapasitas penyerapan ion Pb2+. Penelitian ini dilakukan dengan metode batch, dengan konsentrasi (280, 300, 320, 340, dan 360) ppm, dan waktu kontak (20, 40, 60, 80, dan 100) menit. Hasil penelitian menunjukkan bahwa kondisi optimum diperoleh pada konsentrasi 340 ppm dan waktu kontak 60 menit, dengan kapasitas penyerapan optimum 78,37 mg/g. Model isoterm yang sesuai pada adsorpsi ini yaitu isoterm Freundlich dengan nilai R2 = 0,9968.
Penguatan Komitmen P3DN Dalam Rangka Perizinan Penggunaan Produk Impor Di Pemerintahan Kabupaten Garut Adam, Wahyu; Somadi
Jurnal Ilmu Ekonomi dan Bisnis Vol. 2 No. 3 (2025): JUKONI - Oktober
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jukoni.v2i3.819

Abstract

In this era of globalization, activities aimed at meeting increasing market needs sometimes force the government to import products. The government imports many goods to support the Indonesian economy in various fields such as infrastructure, industry, health, and others. This is due to the limitations of technology, the quality and quantity of products. The Indonesian government itself has created the Domestic Product Use Improvement (P3DN) to maximizing the use of domestically produced products. The purpose of this study is to determine P3DN commitment, and strategies undertaken to strengthening P3DN commitment in the Garut City local government environment. In addition, this research is also to find information about the licensing procedures for using imported products if domestic products do not meet the criteria or quantity needed by an local goverment. This research uses a qualitative approach by conducting in-depth interviews, field observations, and collecting secondary data from trusted sources. The results showed that the P3DN commitment of the Garut City government was very high. The obstacles on strengthening this P3DN commitment are the absence of local products that can substitute imported products, this still dominate in several fields. In addition, the quality and quantity that have not met the standards are also an obstacle to this P3DN program that cannot be equalized. The P3DN team of Garut City often conducts socialization and e-catalog optimization to increase the use of domestic products in the Garut City government. This research also obtained information related to licensing the use of imported products if there are no domestic products that meet the needs
Co-Authors Alizar, Alizar Benti Etika, Sri Edi Nasra Somadi