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All Journal Jurnal Sains dan Teknologi Makara Journal of Science LIMNOTEK
Zulti, Fifia
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Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science

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Adsorption of Waste Metal Cr(VI) with Composite Membranes (Chitosan-Silica Rice Husks) Zulti, Fifia; Dahlan, Kiagus; Sugita, Purwantiningsih
Makara Journal of Science Vol. 16, No. 3
Publisher : UI Scholars Hub

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Abstract

Chromium compounds are widely used in modern industry. Many of these compounds are dumped into the surrounding environment. Membrane technology is more efficient and effective than conventional methods for waste treatment. The research objective was to make a membrane separation process that can be applied to Cr(VI). Membranes were made from chitosan and silica rice husks. Variations of chitosan and silica rice husk used (g) are 2:1 (A1), 2:2 (A2), 3:1 (B1), and 3:2 (B2). The membrane was made by using an inverted phase technique. Results of SEM characterization of membranes showed that B2 has the largest pores at 2.58 μm. The FTIR characterization results indicate the presence of crosslinking between chitosan with silica rice husk with the appearance of Si-O adsorption band at wavelength 1122- 980/cm. A1 membrane, with the smallest pore size has the greatest rejection value towards Cr(VI) which is 70%. The result of this research showed that the composite membrane of silica rice husk was effective enough to adsorb metal Cr(VI) with an average adsorption capacity of 1665.85 mg/g.
Assessment of Natural Bentonite Efficacy for Dye Removal in Textile Wastewater Treatment : Implication for Mitigating River Citarum Pollution Fathan Nabhani, az; Zahidah; Herawati, Heti; Zulti, Fifia
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 30 No. 1 (2024)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2024.4848

Abstract

Textile industries contribute significantly to the economy but release harmful pollutants into the environment, especially rivers.  The effluent from the textile industry contained toxic dyes that can harm the river ecosystem.  Several studies have been conducted to reduce toxic dyes in a river system using bentonite as an adsorbent to reduce river pollution effectively.  However, the effectiveness of bentonite still needs to be tested again using textile liquid waste that has not gone through any waste processing at all.  Citarum is one of the main rivers on Java Island, which suffers from textile effluent, especially azo dyes which are toxic, mutagenic and carcinogenic which can harm the aquatic ecosystem.  Therefore, this study aims to implement natural bentonite as an adsorbent to remove dyes from textile wastewater.  We performed a laboratory test to adsorption on bentonite and textile wastewater considering the variation of adsorbent weight of 10 g and 20 g in 100 mL of textile wastewater stirred in an Erlenmeyer flask at room temperature for 0-300 minutes.  The initial concentration of textile wastewater used was 10%, 30%, and 50%.  We found that the maximum dye removal efficiency was 91.25% with 10% initial concentration treatment, 20 g adsorbent weight, and 60 minutes contact time.  Longer contact time will increase the removal efficiency and adsorption capacity, while higher adsorbent dosage will decrease the concentration of dyes in wastewater.  Efficient textile wastewater treatment has improved water quality, effectively meeting river water quality standards and environmental regulations.
Kinerja Adsorben Zeolit untuk Meningkatkan Kualitas Air Kolong Bekas Tambang Timah Zulti, Fifia
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i2.44129

Abstract

Kolam bekas penambangan timah sangat melimpah di pulau Bangka dan berpotensi untuk dijadikan sebagai sumber air baku dengan pengolahan terlebih dahulu. Zeolit telah banyak digunakan dalam pengolahan air karena kemampuannya yang memadai sebagai adsorben. Penelitian ini bertujuan untuk memanfaatkan dan meningkatkan kinerja zeolit alam untuk menjernihkan air kolong dengan mengukur parameter konsentrasi warna, kekeruhan, pH dan logam Fe. Aktivasi zeolit alam dilakukan dengan pemanasan pada suhu 300 dan 500oC serta perendaman dalam asam sulfat 2M. Air kolong yang diuji dengan  metode batch adsorption untuk melihat kinerja adsorpsi zeolit. Hasil analisa warna dan kekeruhan dengan menggunakan spektrofotometer portable tipe HACH DR/2010 menunjukkan efisiensi reduksi pada kondisi optimum untuk warna sebesar 94,23% dan kekeruhan sebesar 73,33%. Jadi zeolit alam teraktivasi mampu meningkatkan kualitas air kolong dengan menurunkan konsentrasi warna, kekeruhan dan logam besi menjadi 4 PtCo, 3 NTU dan 0,19 mg/L. Nilai ketiga parameter tersebut telah memenuhi standar baku mutu air minum. Simpulan penelitian menunjukkan zeolit alam yang diaktivasi secara fisika-kimia dapat memperbaiki kualitas air kolong.
Co-Authors Fathan Nabhani, az Heti Herawati Kiagus Dahlan Purwantiningsih Sugita Zahidah