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All Journal Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia Jurnal Ilmiah Universitas Batanghari Jambi Mattawang: Jurnal Pengabdian Masyarakat Prosiding Seminar Nasional Rekayasa dan Teknologi (TAU SNAR- TEK) Journal Of Chemical Process Engineering
Iryani, A. Sry
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Journal : Jurnal Ilmiah Universitas Batanghari Jambi

 1 
Efektifitas Arang Serbuk Gergaji Kayu terhadap Pengaruh Penurunan Kadar Logam Berat Cadmiun (Cd), Cod dan Bod pada Sampel Air Sungai Azis, Siti Safira Nurul Maulia; Iryani, A. Sry
Jurnal Ilmiah Universitas Batanghari Jambi Vol 25, No 3 (2025): Oktober
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v25i3.6333

Abstract

This study aims to evaluate the effectiveness of activated carbon derived from sawdust waste, both unactivated and activated, in reducing extreme pH levels, high temperatures, and heavy metals (especially Pb and Cd) in wastewater. Sawdust was converted into charcoal through a carbonization process, then activated using ZnCl₂ solution to enhance its adsorption capacity. Adsorption tests were conducted with variations in adsorbent mass and environmental parameters such as pH and temperature. The results showed that sawdust-based activated carbon significantly reduced Cd concentration, particularly at the optimum mass of 150 mg. Activated carbon performed better compared to non-activated carbon. In addition to reducing heavy metals, the adsorption treatment effectively lowered COD values (from 134.3 mg/L to 67.94 mg/L) and BOD values (from 20.4 mg/L to 14.4 mg/L), demonstrating the adsorbent’s capability to absorb organic compounds. Activation increased surface area and pore volume, thereby making the adsorption process more efficient. Overall, this study concludes that activated carbon from sawdust waste, especially after activation, is a low-cost, effective, and environmentally friendly adsorbent alternative for treating wastewater contaminated with heavy metals and organic matter.
Analisis Kandungan Logam Kadmium (Cd) COD dan BOD dalam Limbah Air Sungai Sleng dengan Menggunakan Arang Aktif dari Kulit Kopi Amelia, Tri Widya Sasnita; Iryani, A. Sry
Jurnal Ilmiah Universitas Batanghari Jambi Vol 25, No 3 (2025): Oktober
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v25i3.6331

Abstract

Heavy metals such as Cadmium (Cd) are pollutants that are very dangerous to life because they are toxic, cannot be degraded, and are easily absorbed into the soil. Metal pollution is very dangerous because it can damage and cause serious global problems. The content of heavy metals such as Cd can damage the environment and waters in the area. The presence of heavy metals in large quantities can affect ecological and biological aspects. This study analyzed the effectiveness of activated charcoal from coffee husks in removing cadmium (Cd) from wastewater from the Sleng River. Wastewater from the Sleng River was contaminated with Cd with a concentration of 0.0521 mg/L, five times higher than the permitted threshold of 0.0100 mg/L. The author made activated charcoal from coffee husks through carbonization and activation using ZnCl₂. The results showed that activated charcoal from coffee husks was effective in reducing Cd concentration, with an optimum mass of 150 mg for both treatments (with and without activation). For COD, unactivated charcoal was more effective (reducing it from 134.3 mg/L to 86.9 mg/L). Meanwhile, for BOD, activated charcoal showed better results (reducing it from 20.4 mg/L to 16.6 mg/L).
Co-Authors Alif Al Furqan, Muh. Amelia, Tri Widya Sasnita Azis, Siti Safira Nurul Maulia Bali, Agustina Deka Minggu HT, ST. Ica HT, ST. Ica. Sinardi, Sinardi