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All Journal Jurnal Sapa Laut Jurnal Penelitian Teknik Sipil Konsolidasi
Ashar, Ahmad
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Engineering Environmental Science Materials Science & Nanotechnology

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ANALISIS KANDUNGAN LOGAM BERAT TIMBAL (Pb) PADA RUMPUT LAUT Kappaphycus alvarezii DI PERAIRAN PALABUSA KOTA BAUBAU Ashar, Ahmad; Emiyarti, Emiyarti; Aslan, La Ode Muhammad; Pratikino, A Ginong; Erawan, Muhammad Trial Fiar
Jurnal Sapa Laut Vol 8, No 2: Mei 2023
Publisher : Fakultas Perikanan dan Ilmu Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33772/jsl.v8i2.43192

Abstract

Rumput laut Kappaphycus alvarezii memiliki kemampuan dalam menyerap partikel logam berat sehingga dapat dijadikan sebagai indikator biologis dalam mengetahui pencemaran logam berat di perairan. Penelitian ini bertujuan untuk mengetahui kandungan logam berat Timbal (Pb) pada K. alvarezii dan air laut, hubungan parameter kualitas perairan terhadap kandungan logam berat Pb pada K. alvarezii dan air laut dan mengetahui faktor biokonsentrasi logam berat Pb pada K. alvarezii di Perairan Palabusa. Pengambilan data dilaksanakan di Perairan Palabusa pada bulan Agustus 2022. Metode pengambilan sampel menggunakan metode purposive sampling dan analisa kandungan logam berat Pb menggunakan instrumen Atomic Absorption Spectrophotometry (AAS). Hasil dari penelitian ini menunjukkan kadar logam berat Pb pada rumput laut K. alvarezii berkisar 0,1360-0,2040 ppm dengan nilai rata-rata yaitu 0,1587 ppm dan air laut berkisar antara 0,0034–0,0102 ppm dengan nilai rata-rata yaitu 0,0074 ppm. Berdasarkan Keputusan Menteri Lingkungan Hidup nomor 51 Tahun 2004 ditetapkan nilai baku mutu logam berat Pb yaitu 0,008 ppm, sehingga hal tersebut menunjukkan kandungan logam berat Pb pada Rumput laut K. alvarezii sudah berada diatas ambang batas namun pada air laut masih dibawah ambang batas baku mutu. Kata kunci: Atomic Absorption Spectrophotometry (AAS), Kappaphycus alvarezii, Faktor Biokonsentrasi, Palabusa, Timbal (Pb)
Pengaruh Manajemen Material Terhadap Produktivitas Kerja Pada Pekerjaan Pembangunan Mall Pelayanan Publik Gowa Ashar, Ahmad; Abduh, M. Natsir; Yuniarto, Eka
Jurnal Penelitian Teknik Sipil Konsolidasi Vol. 3 No. 1 (2025): Jurnal Penelitian Teknik Sipil Konsolidasi, Januari 2025
Publisher : Program Studi Teknik Sipil Universitas Bosowa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56326/jptsk.v3i1.4265

Abstract

Low labor productivity in a construction project can have a negative impact, such as causing project delays so that the project is not completed on time, therefore this study aims to identify factors in material management that affect labor productiveness. The type of research used is a quantitative approach with the survey method and analyzed with the double linear regression analysis operated with the Statical Program for Social Science (SPSS) program. The double lineary regression is used to trace patterns of relationships between bound variables with two or more free variables. Based on the regression model obtained the output value of F sig. 0,000 smaller than 0.05 stated that material delivery, material usage, material storage and Quality Control together (simultaneously) influence the (Y) productivity variable. The factor that has the most dominant influence on the productivity of the project is the Material Delivery Variable (X1) with a significance of 0.001 with a R-square value of 0.428 which means 42.8% of the influence of X1 on Labor Productivity (Y) and the Material Usage Variabel (X2) signifying value of 0,000 with the R-Square of 0.557 which means a large 55.7% of the impact of X2 on Labor Produktivity. (Y).
Co-Authors Abduh, M. Natsir Aslan, La Ode Muhammad Eka Yuniarto Emiyarti Emiyarti, Emiyarti Muhammad Trial Fiar Erawan Pratikino, A Ginong