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Synthesis of Complex Compounds of Cr(III) Metal Ions and Their Application as Fluorosensors of Pb(II) and Cu(II) in Laboratory Waste Syahputri, Yulian; Sutanto, Sutanto; Kusumawardani, Linda Jati; Saputra, Muhammad Rizki
al Kimiya: Jurnal Ilmu Kimia dan Terapan Vol. 12 No. 1 (2025): June 2025
Publisher : Department of Chemistry, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/ak.v12i1.43967

Indonesia's exposure of lead (Pb) and copper (Cu) heavy metal ions to humans and the environment has received increased attention over the past few decades as a result of the increasing application of heavy metals in various industries and transportation. Complex compounds of Cr3+ sensors with fluorescence-based pyrazoline-derived ligands (fluorosensors) have the potential to detect Pb2+ and Cu2+ heavy metal ions. The purpose of this study is to synthesize complex compounds of Cr3+ ions with pyrazoline-derived ligands and its potential as a fluorescence-based sensor of Pb2+ and Cu2+ heavy metal ions. Complex compounds formed are characterized and fluorosensor study by spectroscopic methods. The results showed that the synthesis of complex compounds was successfully carried out and a brown precipitate with a melting point of 253.2°C was obtained. Based on the results of the characterization of complex compounds of Cr3+ metal ions with pyrazolin-derived ligands using a UV-Vis spectrophotometer, two absorption peaks were obtained at 226 and 370 nm, two peaks indicating the presence of transition types π→π* and n→π*. The fluorescence spectrophotometer results showed two emission peaks, the peak absorption maximum of Cr3+ complex compounds was in the region 491 nm with a fluorescence intensity of 320.40 a.u. The determination of the fluorosensor potential of Cr3+ complex compounds with the addition of Pb2+ and Cu2+ metal ions showed significant changes in fluorescence so that fluorosensor types were obtained for Cr3+ metal ion complex compounds with Pb2+ and Cu2+, namely "turn-on" and "turn-off", respectively.

TiO2/Zeolite Coal Fly Ash Nanocomposite for Photodegradation of Naphthol Blue Black Dye: Optimization and Mechanism under Visible Light Kusumawardani, Linda Jati; Syahputri, Yulian; Apriansyah, Apriansyah; Fathurrahman, Muhammad
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45036

Naphthol Blue Black (NBB) is a water-insoluble synthetic azo dye with a molecular weight of 616.49 g/mol that requires alkaline treatment for solubility and poses environmental risks by reducing water quality, increasing BOD and COD, and disrupting aquatic ecosystems. The TiO₂/Zeolite Fly Ash nanocomposite represents a promising material for the photocatalytic degradation of NBB. Analysis of the TiO2/zeolite fly ash nanocomposites revealed the presence of Ti-O-Si and Ti-O-Al functional groups, along with a suitable band gap energy value of 2.85 eV for visible light consumption. The average particle size is 62-75 nm, with a relatively high crystallinity of 95.64%. The insertion of TiO2 into the surface of the zeolite changes the size of the catalyst from 62-75 nm to 10 nm and 98.2% crystallinity. An emphasis was placed on the key parameters governing the degradation process. The test results showed that the degree of degradation increases at lower pH, while changes in catalyst dosage and initial dye concentrations do not significantly affect the degradation of NBB. The addition of H2O2 demonstrates the increasing degradation efficiency. The optimum operating process was carried out by adding 1.2 % (v/v) of H2O2, the pH 2, 0.1% (w/v) of catalyst, an initial concentration NBB of 12 mg/l, and irradiating under visible light for 75 minutes. It was a short period to produce the best conditions for degrading 12 mg/l naphthol blue-black, with a degradation efficiency of 99.68%. The rate of photodegradation kinetics had a reaction rate constant of 0.0312 min-1 and was followed a pseudo-first-order Langmuir-Hinshelwood. From the results, it was found that adsorption is an essential factor in the photodegradability of the dye. The linear transform of the Langmuir isotherm curve was further used to determine the characteristic parameters, which included the maximum absorbable dye quantity Qmax=11,8217 mgg-1. LC-MS/MS analysis identified the compounds formed through the photocatalytic degradation of naphthol blue-black dye into lower-molecular-weight molecules, such as benzoic acid, maleic acid, and phenol, which can gradually break down naturally into carbon dioxide and water.

Intensification of catfish cultivation at Pokdakan Baraya in Kotabatu Village, Bogor Regency Hasanah, Uswatun; Kusumawardani, Linda Jati; Syahputri, Yulian; Mulyati, Ade Heri; Widiastuti, Diana; Warnasih, Siti
Jurnal Pengabdian Masyarakat Inovatif Vol. 3 No. 1 (2025): JPMI (Jurnal Pengabdian Masyarakat Inovatif)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jpmi.v3i1.154

Kotabatu Village, located in Bogor District, is home to several Fish Cultivator Groups (Pokdakan), one of which is Pokdakan Baraya, focused on cultivating catfish. Based on a focus group discussion conducted by the Pakuan University Implementation Team, Pokdakan Baraya faces challenges related to low income, high production costs, and the risks involved in traditional fish farming practices. In response, the team proposed the introduction of the Biofloc system for fish cultivation. The service methods included a comprehensive survey to assess the conditions and needs of the target community, followed by focus group discussions (FGD). The next phase involved outreach by the Pakuan University service team, employing knowledge-sharing methods, case studies, and training on the biofloc technology. To evaluate the impact, regular monitoring and evaluation processes were implemented, which included counseling, pond construction, seed distribution, nursery establishment, and intensive catfish rearing using the biofloc system. As a result of the biofloc system’s adoption, pond productivity increased by 1.8%, and the harvest time was reduced by 15 days. Additionally, the knowledge of Pokdakan Baraya members regarding fish cultivation technology grew by 60%, and their income saw an 81% increase from the sale of the catfish. The successful implementation of this system demonstrates significant improvements in the efficiency, productivity, and economic stability of the community.

Intensification of catfish cultivation at Pokdakan Baraya in Kotabatu Village, Bogor Regency Hasanah, Uswatun; Kusumawardani, Linda Jati; Syahputri, Yulian; Mulyati, Ade Heri; Widiastuti, Diana; Warnasih, Siti
Jurnal Pengabdian Masyarakat Inovatif Vol. 3 No. 1 (2025): JPMI (Jurnal Pengabdian Masyarakat Inovatif)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jpmi.v3i1.154

Kotabatu Village, located in Bogor District, is home to several Fish Cultivator Groups (Pokdakan), one of which is Pokdakan Baraya, focused on cultivating catfish. Based on a focus group discussion conducted by the Pakuan University Implementation Team, Pokdakan Baraya faces challenges related to low income, high production costs, and the risks involved in traditional fish farming practices. In response, the team proposed the introduction of the Biofloc system for fish cultivation. The service methods included a comprehensive survey to assess the conditions and needs of the target community, followed by focus group discussions (FGD). The next phase involved outreach by the Pakuan University service team, employing knowledge-sharing methods, case studies, and training on the biofloc technology. To evaluate the impact, regular monitoring and evaluation processes were implemented, which included counseling, pond construction, seed distribution, nursery establishment, and intensive catfish rearing using the biofloc system. As a result of the biofloc system’s adoption, pond productivity increased by 1.8%, and the harvest time was reduced by 15 days. Additionally, the knowledge of Pokdakan Baraya members regarding fish cultivation technology grew by 60%, and their income saw an 81% increase from the sale of the catfish. The successful implementation of this system demonstrates significant improvements in the efficiency, productivity, and economic stability of the community.

Upaya Pengurangan Limbah Kemasan Plastik Air Minum Melalui Kajian Kualitas Keran Air Siap Minum (KASM) di Wilayah Kota Bogor Iryani, Ani; Syahputri, Yulian; Ramadhini, Dania; Purnama, Dicky Budhi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 2 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i2.597

Sales of bottled drinking water (AMDK) increase in line with population growth every year. Based on data from the Indonesian Plastic Industry Association (Inaplas) and BPS, Indonesia produces 64 million tons of waste/year, and 3.2 million tons of plastic waste comes from AMDK. In connection with the community's dependence on consuming AMDK, the government through the Regional Public Company (PERUMDA) Tirta Pakuan created a superior program, namely Tap Water Ready to Drink (KASM). The problem is that many residents do not take advantage of KASM's services. The aim of this research is to compare the quality of AMDK and KASM so that the public can obtain information and increase confidence in the quality, safety and cleanliness of drinking water originating from KASM. This research method includes sampling followed by analysis of physical parameters (color, odor, taste, temperature), chemical (turbidity, TDS, metals, pH, Cl-, F-, NO2-, NO3-, NH3, hardness, CN -, SO42-) and Total microbiology (Coliform, E.coli) based on quality standards PERMENKES 492/2010. KASM samples were taken at 6 points using the SNI 8995:2021 method. The AMDK sample was obtained by purchasing 5 brands of AMDK randomly. Physical, chemical and microbiological parameters were analyzed using the APHA, SNI, US-EPA methods using ICP-OES, UV-Vis spectrophotometer and nephelometer. The results show that all KASM and AMDK samples have met the quality standards of PERMENKES 492/2010. Based on the comparison of analysis results, all AMDK samples had lower quality compared to KASM samples even though other microbiological, chemical and physical parameters were not significantly different.

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