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DESY KURNIAWATI
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Pemanfaatan Limbah Kulit Buah Nanas dan Jeruk untuk Produksi Eco Enzyme: Uji Fosfor, Kalium, pH, dan TDS Molsa Vitaloka Putri; Desy Kurniawati; Romy Dwipa Yamesa Away
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7562

Abstract

The limited research on the use of pineapple and orange peel waste as base materials for eco enzyme production forms the background of this study, despite their high potential as environmentally friendly solutions for organic waste management. This study aims to analyze the characteristics of eco enzyme produced from the fermentation of pineapple and orange peel waste, through phosphorus and potassium tests, as well as measurements of pH and Total Dissolved Solids (TDS). The method employed combines a qualitative approach for phosphorus and potassium testing with a quantitative approach for pH and TDS measurements, using samples from various fruit peel fermentation treatments. The results showed that the resulting eco enzyme had a yellowish-brown, slightly turbid appearance, with relatively high TDS values due to dissolved solid content. The pH values ranged from 3.5 to 4, indicating acidity influenced by organic acids formed during fermentation. Content analysis showed positive results for phosphorus and potassium, supporting its potential use as a liquid organic fertilizer, along with the presence of flavonoids that support its application as a household cleaner or natural disinfectant. The study concludes that pineapple and orange peel waste is an effective and sustainable raw material for eco enzyme production, offering both economic and ecological benefits in household organic waste management.
Pengaruh Doping Ag pada Sintesis Nanopartikel CuO dan Aktivitas Fotokatalitik untuk Degradasi Rhodamin B Aysha Famil Hidayah; Hary Sanjaya; Desy Kurniawati; Deski Beri
MASALIQ Vol 6 No 2 (2026): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i2.8984

Abstract

Textile dye wastewater contamination, particularly by Rhodamine B, is a serious environmental problem because it is toxic and difficult to degrade naturally. This study aimed to synthesize and evaluate the photocatalytic performance of pure CuO nanoparticles and Ag-doped CuO for the degradation of Rhodamine B. The materials were synthesized using the sol–gel method with an Ag doping concentration of 0.2 mmol. The optical properties were characterized using UV–Diffuse Reflectance Spectroscopy (UV-DRS) in the wavelength range of 185–1100 nm to determine the bandgap energy values using the Kubelka–Munk equation. Photocatalytic activity was tested through the degradation of Rhodamine B under visible light irradiation, with absorbance measurements obtained using a UV–Vis spectrophotometer at a maximum wavelength of 554 nm. The results showed that Ag doping reduced the CuO bandgap from 1.4819 eV to 1.2539 eV. Photocatalytic tests revealed that Ag-doped CuO exhibited higher activity than pure CuO, with Rhodamine B degradation reaching 60.55% at 90 minutes of irradiation, compared with only 32.72% for pure CuO at the same reaction time. This enhanced photocatalytic activity is associated with the role of Ag in suppressing electron–hole recombination, increasing light absorption through the surface plasmon effect, and providing more active sites on the catalyst surface. These findings confirm that Ag-doped CuO has promising potential as an effective photocatalyst for the treatment of textile dye wastewater and the control of environmental pollution.
Pengaruh Kecepatan Pengadukan pada Biosorpsi Direct Blue 86 oleh Kulit Kelengkeng Termodifikasi Anastasya Tri Yolanda; Desy Kurniawati
MASALIQ Vol 6 No 3 (2026): MEI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i3.9912

Abstract

Direct Blue 86 (DB-86) is an anionic azo dye that is widely used in the textile industry and has relatively persistent properties in aquatic environments, making low-cost adsorbents necessary for the treatment of colored liquid waste. This study aims to evaluate the effect of stirring speed on the biosorption of DB-86 using longan peel modified with duck egg white in batch mode. The biosorbent was prepared from acid-activated longan peel and duck egg white with a KL:PTI mass ratio of 1:1. Biosorption experiments were conducted using 0.2 g of biosorbent and 25 mL of 450 mg/L DB-86 solution at pH 2, a particle size of 63 µm, and a contact time of 30 minutes. Variations in stirring speed were set at 100, 150, 200, 250, 300, and 350 rpm. The dye concentration after biosorption was measured using a UV-Vis spectrophotometer at a wavelength of 627 nm and converted based on the standard curve equation. The results showed that the adsorption capacity increased from 46.734 mg/g at 100 rpm to a maximum of 51.894 mg/g at 200 rpm, with the highest removal efficiency of 95.25%. However, increasing the stirring speed to 250–350 rpm gradually reduced biosorption performance. The optimum condition at 200 rpm indicates that adequate stirring can improve solution homogeneity and external mass transfer, whereas excessive stirring may disrupt the interaction between the dye and the biosorbent. These findings emphasize the importance of optimizing stirring speed in the biosorption process and demonstrate the potential of longan peel modified with duck egg white as a low-cost biosorbent for removing anionic dyes from liquid waste.
Co-Authors Afrianty Ramadhani Anastasya Tri Yolanda Andreas Difa Annisa Haqqu Arif Juliari Kusnanda Arifah Sri Wahyuni Aysha Famil Hidayah Aziza Putri Ana Budhi Oktavia Deski Beri Edi Nasra Eka Yusmita Em Sutrisna Fahilatul Syukro Fitriani Indah Permai Hardeli Hamzah Hary Sanjaya Isra Yeni iswendi iswendi Khalisa Khalisa Khalisa Mawardi Anwar Mawardi Mawardi Meissa Lifangrha Ronald Mesa Saputri Molsa Vitaloka Putri Mulia, Melindra Munadi Munadi Najla Dhifa Tofanny Najwa Annisa Oktaviana Nuzulia Yona Olga Tiara Rizki Putri Nugraha Rahardian Z Refi Yeni Reviana Ervita Riga Riga Riri Nofrita Romy Dwipa Yamesa Away Shintia Nabila Putri Sisri Wartati Suci Nurazmi Syamsi Aini Trisna Kumala Sari Yerimadesi Yogi Febrianto