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All Journal Chemistry Indonesian Journal of Chemical Research Jurnal Ilmiah Teknik Kimia E-Jurnal SPIRIT PRO PATRIA Jurnal Teknologi
Mulyadi, Irwan
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Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Environmental Science Health Professions Law, Crime, Criminology & Criminal Justice Mechanical Engineering

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The Multi Soil layering Method for Wastewater Treatment: Review Rahayu, Aster; Mulyadi, Irwan; Fajri, Joni Aldilla; Jamilatun, Siti Jamilatun; Nuraini, Nuraini; Wulandari, Nurul; Marlena, Yuni; Ningsih, Devi Yogi Noviana; Lim, Lee Wah
Indonesian Journal of Chemical Research Vol 10 No 2 (2022): Edition for September 2022
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2022.10-ast

Abstract

Liquid waste is the main source of contamination of water bodies, especially river water. This pollution causes decreased water quality in water bodies. One of the wastewater treatment treatments is the Multi Soil Layering (MSL) method. Some of the advantages of using the MSL method are that it is known to be cheap in terms of cost, easy to implement, does not require complicated maintenance so that it can be used continuously, and is also environmentally friendly. One of the constituent materials of the MSL reactor is andesol soil, gravel, and pearlite. MSL has two wastewater treatment zones, the aerobic zone, and the anaerobic zone. The article review aims to compare the efficiency of reducing the levels of pollutant parameters from aerobic and anaerobic processes in MSLmethod in wastewater.
Konsentrasi Merkuri (Hg) pada Sedimen Amalgamasi yang Dibuang ke Badan Air dari Aktivitas Penambangan Emas Tradisional di Desa Tambang Sawah Kabupaten Lebong Mulyadi, Irwan; Indrawijaya, Budhi; Adlin, Irman Ansari
Jurnal Teknologi Vol 25, No 2 (2025): Agustus 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i2.7509

Abstract

Traditional gold mining activities in Tambang Sawah Village, Lebong Regency, Bengkulu Province, produce tailings waste with high concentrations of mercury (Hg). This waste is discharged directly into the Air Putih River without prior treatment. This research aims to measure mercury levels in the tailings and analyze the relationship between the quantity of discarded tailings and the Hg contamination levels in river sediments. Sampling was conducted following the JPHA method, and Hg level analysis was based on NOAA and ASTM guidelines. The results indicate that all tailings samples from 10 discharge points exceeded the mercury contamination threshold. The total estimated tailings discharged each week reached 1,600 kg from 40 miners. The highest concentrations were found at points with the most miners. A laboratory test on 10 tailing samples collected from discharge points along the Air Putih River showed that all samples contained mercury (Hg), with the highest concentration reaching up to 266 ppm.
Penilaian Risiko Kesehatan Kerja Akibat Pajanan Bahan Kimia Pada Laboratorium PT X Mulyadi, Irwan; Tejamaya, Mila
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v8i2.27650

Abstract

Laboratory workers have potential health and safety risks, health risks in laboratories are potential health and safety risks, and health risks in laboratories are related to exposure to hazardous chemicals. Chemicals often used in laboratory testing are organic solvents such as benzene, toluene, and xylene which have risks to workers' health. Chemical health risk assessments are important for assessing the potential health and safety hazards of workers using the approach cross-sectional which refers to the method Chemical Health Risk Assessment DOSH, Malaysia. Data collection was carried out qualitatively starting with identifying dangerous chemicals, then observing the use of chemicals, followed by assessing the level of health risks, and determining the adequacy of control action priority for inhalation and dermal exposures respectively. The research results at the PT show that the risk level for inhalation exposure is 12 (moderate risk) and the risk level for dermal exposure is 2 (moderate), but still requires improvement in existing risk controls.
EKSPERIMEN ECOFRIENDLY PAVING PLASTIK HDPE Mudjanarko, Sri Wiwoho; Bin Arshad, Mohd Fadzil; Harmanto, Dani; Nurmianto, Eko; Artaya, I Putu; Rasidi, Nawir; Safarizki, Hendramawat Aski; Mayestino, Alexander Machicky; Mulyadi, Irwan; Bahaswan, Rizal; Ningsih, Hardian; Wiwoho, Firdaus Pratama; Achmad, Imron Ramdhani; Maruli, Sahat; Tjahjono, Prijo
E-Jurnal SPIRIT PRO PATRIA Vol 9 No 1: Maret 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat / Narotama University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29138/spirit.v9i1.2217

Abstract

Sampah merupakan sumber masalah dalam kehidupan kita sehari-hari baik di daerah perkotaan maupun pinggiran perkotaan. Keterbatasan pembuangan sampah menimbulkan bencana sendiri apabila tidak bisa dilakukan pengelolaan yang baik atau didaur ulang untuk kebutuhan kehidupan lainnya. Proses daur ulang bisa menjadi peluang bisnis masyarakat sekitar maupun Industri skala UMKM. Salah satu bagian sampah yang bisa didaur ulang adalah plastik. Plastik merupakan material yang sulit diuraikan didalam tanah. Di beberapa kota besa Di beberapa kota besar, permasalahan pemilahan plastik dilakukan oleh Bank Sampah yang dibentuk sesuai tingkat kesadaran masyarakatnya seperti Bank Sampah Bhakti Pertiwi di bawah naungan Bumdes Tamansera Tambaksawah di Kota Sidoarjo.. Permasalahan ini akan menimbulkan bencana bagi umat manusia. Tujuan penelitian ini ini untuk memproses limbah plastik menjadi produk paving yang ramah lingkungan dengan mutu yang bisa menerima beban ringan seperti sebagai jalan setapak. Metodologi yang dilakukan dalam pembuatan paving plastik adalah mengumpulkan tutup botol plastik yang termasuk kategori plastik HDPE. Langkah selanjutnya dilakukan pembakaran menggunakan media kompor berenergi gas LPG. Setelah plastik mendidih dan mencair, plastik hasil pembakaran dimasukkan ke media cetak paving dan setelah cetakan penuh dilakukan perendaman di air untuk melepaskan paving plastik dari cetakan. Dari hasil pengujian material ini dihasilkan mutu tekan yang baik sehingga bisa dijadikan salah satu cara menyelesaikan permasalahan sampah plastik dan produk ekonomis yang dihasilkan bisa menjadi bagian bisnis umkm masyarakat sekitarnya.
Co-Authors Achmad, Imron Ramdhani Adlin, Irman Ansari Bin Arshad, Mohd Fadzil Eko Nurmianto Fajri, Joni Aldilla Firdaus Pratama Wiwoho, Firdaus Pratama Hardian Ningsih, Hardian Harmanto, Dani Hendramawat Aski Safarizki I Putu Artaya Indrawijaya, Budhi Jamilatun, Siti Jamilatun Lee Wah Lim Marlena, Yuni Maruli, Sahat Mayestino, Alexander Machicky Nawir Rasidi Ningsih, Devi Yogi Noviana Nuraini Nuraini NURUL WULANDARI Rahayu, Aster Rizal Bahaswan Sri Wiwoho Mudjanarko, Sri Wiwoho Tejamaya, Mila Tjahjono, Prijo