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All Journal Seminar Nasional Lahan Suboptimal Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Umi Chasanah
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Industrial & Manufacturing Engineering Social Sciences Other

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KemampuanAkumulasi Merkuri oleh Bakteri yang Diisolasi dari Tailing Tambang Emas Skala Kecil Siska Nurfitriani; Umi Chasanah; Yulia Nuraini; Amrullah Fiqri; Eko Handayanto
Seminar Nasional Lahan Suboptimal 2018: Prosiding Seminar Nasional Lahan Suboptimal "Tantangan dan Solusi Pengembangan PAJALE dan Kela
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (713.094 KB)

Abstract

Nurfitriani et al, 2019. Mercury Accumulation Ability of Bacteria Isolated from Small-Scale Gold Mine Tailing. pp. 366-375. Heavy metal pollution in the soil due to small-scale gold mining activities (ASGM) is responsible for 37% of mercury (Hg) pollution to the environment in the form of tailings . This pollution causes mercury enrichment  in agricultural land and crops above the safe limits. This study aimed to isolate heterotrophic bacteria which can  accumulate mercury from small-scale gold minetailings in Sekotong District, West Lombok. In this study, mercury resistant bacteria were obtained through a series of on Nutrient Agar medium. The obtained isolates were identified based on the colony morphology (the Bergey Manual Determinative system), gram staining test, biochemical test and growth curve test. Hg accumulation ability test was carried out on liquid Nutrient Broth (NB) medium containing 50 mL + HgCl2( 10 ppm, 20 ppm, and 30 ppm). The ability of isolates to accumulate Hg was also tested on gold mine tailings with an incubation method for 4 weeks. The results showed that four isolates of mercury-resistant bacteria were isolated, namely Brevundimonasvesicularis, Nitrococcusmobilis, Fusobacterium aquatile, and Fusobacterium necrogenes. Two of four isolates obtained, Fusobacterium aquatile and Brevundimonasvesicularis, could accumulate Hg highest in tailing medium.Brevundimonasvesicularis had the highest Hg accumulation ability which was approximately 1.68, 2.08, and 2.17 ppm Hg at 10, 20, and 30 ppm Hg treatment, respectively. Based on this study, Fusobacterium aquatile and Brevundimonasvesicularis have the potential to be used in bioremediation of soil contaminated with mercury.
Pengaruh Kompetensi Instruktur, Perencanaan dan Implementasi Terhadap Kualitas Kompetensi Peserta Program Pelatihan Kerja pada Balai Besar Pelatihan Vokasi dan Produktivitas (BBPVP) Semarang Umi Chasanah; Jefristson R Riwu Kore
Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah Vol. 6 No. 11 (2024): Al-Kharaj: Jurnal Ekonomi, Keuangan & Bisnis Syariah
Publisher : Intitut Agama Islam Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/alkharaj.v6i11.5708

Abstract

This study aims to find out and prove the influence of instructor competence, training planning, and training implementation on the quality of competency of participants in the job training program at the Semarang Vocational Training and Productivity Center (BBPVP). In this study, the quality of participant competence is the main indicator of the success of the training program. However, several factors such as instructor competence, proper training planning and implementation are often identified as important determinants influencing those outcomes. The research method used is a quantitative method with 100 samples from 912 populations. Data was collected from a number of trainees at BBPVP Semarang through validated questionnaires. The types of data sources used are primary and secondary data. The data analysis technique in this study uses SPSS (Statistical Product and Service Solution) software version 26. The results of this study show that the competence of instructors, training planning and training implementation significantly affect the quality of participants' competencies by 42.1%. These findings indicate the importance of improving the competence of instructors as well as planning and implementing more effective training to improve the quality of training results at BBPVP Semarang.
Co-Authors Amrullah Fiqri Eko Handayanto Jefristson R Riwu Kore Siska Nurfitriani Yulia Nuraini