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Pengukuran Daya Jerap Dan Efektivitas Adsorpsi Ion Besi (Fe2+) Menggunakan Adsorben Ampas Biji Kopi Teraktivasi Naoh

ABSTRACT
The issue of heavy metal contamination in industrial wastewater, particularly ferrous ions (Fe²⁺), poses a serious threat to the environment and human health. One effective and eco-friendly solution is the adsorption method using biomass-based adsorbents. Coffee grounds, an organic waste rich in lignocellulose, show great potential as a raw material for biomass adsorbents. Chemical activation using NaOH enhances the adsorption capacity by increasing surface porosity. This study aims to determine the effect of temperature and contact time on the adsorption capacity and efficiency of Fe²⁺ ions using NaOH-activated coffee grounds as the adsorbent. The experimental method involved drying, sieving, chemical activation of coffee grounds with 1 N NaOH for 24 hours, followed by adsorption in a 10 ppm Fe²⁺ solution with varying temperatures (40 °C and 50 °C) and contact times (15–60 minutes). Fe²⁺ ion concentrations were analyzed using UV-Visible spectrophotometry to evaluate adsorption capacity and efficiency. The results showed that both temperature and contact time significantly affected the adsorbent's performance. The highest adsorption capacity achieved was 0.501 mg/g, with an adsorption efficiency of 99.91% at 50 °C and 60 minutes of contact time. In conclusion, NaOH-activated coffee grounds exhibit strong potential as an alternative adsorbent for reducing Fe²⁺ levels in aqueous solutions, especially under optimal temperature and contact time conditions.
Keywords: Adsorption, Adsorbent, Coffee Grounds, Ferrous Ion (Fe²⁺), NaOH.

Ketersediaan
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Perpustakaan Universitas Riau 2207036503
2207036503
Tersedia
Informasi Detail
Judul Seri
-
No. Panggil
2207036503
Penerbit
Pekanbaru : Universitas Riau – F.TEKNIK – kimia.,
Deskripsi Fisik
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Bahasa
Indonesia
ISBN/ISSN
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Klasifikasi
2207036503
Tipe Isi
-
Tipe Media
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Tipe Pembawa
-
Edisi
-
Subjek
TEKNIK KIMIA
Info Detail Spesifik
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Pernyataan Tanggungjawab
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