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INDONESIA
PROSIDING SEMINAR KIMIA
Published by Universitas Mulawarman
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 502 Documents
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MINI REVIEW: PEMANFAATAN ADSORBEN ARANG AKTIF CANGKANG TELUR TERHADAP LOGAM BERAT Sarah Nur Aulia Azzahra; Soerja Koesnapardi; Ika Yekti Liana Sari
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A mini review on the utilization of activated carbon adsorbent from eggshells for heavy metal removal has been conducted. From the study results, it is known that activated carbon made from eggshells contains chemical compounds such as calcium carbonate (CaCO₃) at 94%, magnesium carbonate (MgCO₃) at 1%, and calcium phosphate (Ca₃(PO₄)₂) at 4%. The process of making activated carbon from eggshells involves first physically activating the eggshell powder through heating, followed by chemical activation using various strong acids such as HCl. The material is then neutralized and dried at 100°C for 30 minutes. The resulting activated carbon is then brought into contact with heavy metals such as Lead (Pb), Cadmium (Cd), Copper (Cu), Zinc (Zn), and Iron (Fe). The results show that the adsorption percentage and adsorption capacity of the eggshell activated carbon range from 32.09% to 99.81% and 67.745%, respectively. These values are influenced by factors such as surface area, concentration, stirring speed, and the activation conditions of the adsorbent. Keywords: Activated Carbon, Adsorption, Heavy Metals
ANALISA KADAR AMONIA DAN UJI LOGAM BERAT (Fe dan Mn) PADA AIR LIMBAH DOMESTIK Tentriati Cahaya; Aman Sentosa Panggabean; Moh Syaiful Arif
PROSIDING SEMINAR KIMIA Vol 4 No 1 (2025): Prosiding SNK 2025
Publisher : Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Mulawarman

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Abstract

A study entitled Analysis of Ammonia Levels and Heavy Metals (Fe and Mn) in Domestic Wastewater has been conducted. This research aimed to determine the concentrations of ammonia and heavy metals (Fe and Mn) in domestic wastewater from the drainage channel on Jalan H. M. Ardans (AL 1) and the wastewater treatment plant of PT. LAB (AL 2). Ammonia levels were analyzed using the phenate spectrophotometric method, while heavy metal concentrations (Fe and Mn) were determined using the Atomic Absorption Spectrophotometry (AAS) method. Based on the analysis results, ammonia levels were found to be 0.45 mg/L in AL 1 and 0.08 mg/L in AL 2. The concentration of iron (Fe) was 3.17 mg/L in AL 1 and 0.50 mg/L in AL 2. The concentration of manganese (Mn) was 15.07 mg/L in AL 1 and 0.30 mg/L in AL 2. The ammonia levels in both AL 1 and AL 2 complied with the quality standard of 10 mg/L. The Fe concentrations in AL 1 and AL 2 also met the quality standard of 5 mg/L. The Mn level in AL 2 met the quality standard of 2 mg/L, whereas the Mn level in AL 1 exceeded the permissible limit. Keywords: ammonia, iron (Fe), domestic wastewater, manganese (Mn)

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