Faizah, Siti Nur (2026) Penurunan Kadar Logam Cr (VI) Dan Zat Warna Dari Limbah Batik Menggunakan Adsorben Zeolit Terimpregnasi Fe2(SO4)3 Dengan Metode Adsorpsi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
This study investigates the treatment of batik wastewater containing Cr(VI) and dyes using Fe₂(SO₄)₃-impregnated natural zeolite in a fixed-bed column system. The background of this study is the presence of heavy metals and dyes in batik wastewater, which have the potential to cause environmental pollution. Meanwhile, natural zeolite has limited adsorption capacity and therefore requires modification. Fe₂(SO₄)₃ impregnation was conducted to introduce Fe-based active sites onto the zeolite surface, thereby enhancing its adsorption capacity toward anionic contaminants. The zeolite was first activated using 2 M HCl and subsequently impregnated with 0.5 M Fe₂(SO₄)₃. The research variables were flow rates of 400–1400 mL/min and adsorbent masses of 350–550 g. Adsorbent characterization was performed using BET and SEM-EDS, while Cr(VI) and dye concentrations before and after adsorption were analyzed using UV-Vis spectrophotometry. The BET characterization results showed that HCl activation increased the specific surface area of the zeolite from 99.07 to 128.08 m²/g and the pore volume from 0.14 to 0.16 cm³/g, while the pore diameter remained relatively unchanged. The SEM-EDS results also confirmed the successful impregnation of Fe₂(SO₄)₃. The Fe content increased from 3.73 wt% in the activated zeolite to 9.12 wt% after impregnation, corresponding to an increase of approximately 144.5%. The adsorption performance showed that a lower flow rate resulted in better removal of Cr(VI) and dyes due to the longer contact time between the wastewater and adsorbent. Conversely, increasing the adsorbent mass increased the number of available active sites, thereby enhancing the adsorption capacity. The optimum condition was obtained at an adsorbent mass of 550 g and a flow rate of 400 mL/min. Under these conditions, the Cr(VI) concentration decreased from 3.69 to 0.75 mg/L, while the dye concentration decreased from 978 to 198.8 Pt-Co. Therefore, under these conditions, the concentrations of Cr(VI) and dye met the quality standards applied in this study, namely 1 mg/L for Cr and 200 Pt-Co for color, respectively.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TP Chemical technology > TP155 Chemical engineering | ||||||||
| Divisions: | Faculty of Engineering > Departement of Chemical Engineering | ||||||||
| Depositing User: | Izah Siti Nur Faizah | ||||||||
| Date Deposited: | 01 Sep 2026 03:25 | ||||||||
| Last Modified: | 01 Sep 2026 03:25 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/59463 |
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