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All Journal MEDIA KONSERVASI Jurnal Ilmu Kimia Universitas Brawijaya Journal of Degraded and Mining Lands Management The Journal of Pure and Applied Chemistry Research EduChemia: Jurnal Kimia dan Pendidikan Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Jurnal Kartika Kimia Rengganis Jurnal Pengabdian Masyarakat Molekul: Jurnal Ilmiah Kimia Biosaintifika: Journal of Biology & Biology Education
Barlah Rumhayati
Chemistry Department Brawijaya University Jl. Veteran 65145 Malang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences

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The Study of Removal of Polyvinyl Chloride (PVC) Particles from Wastewater through Electrocoagulation Ramadani, Azaria Ivana; Fardiyah, Qonitah; Rumhayati, Barlah
Indonesian Journal of Chemistry Vol 24, No 5 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95589

Abstract

Plastic was produced massively, especially using polyvinyl chloride (PVC) as a raw material. Unfortunately, this condition cause affects the environment, which creates a new pollutant issue. It is essential to study the removal of PVC microplastics in current water treatment processes. The study of wastewater treatment can be achieved using electrocoagulation, which has several benefits, including low-cost, simple chemicals, and accessible equipment operation. This research investigated the study of the removal of PVC microplastics from wastewater by electrocoagulation. The new potential of the electrocoagulation technique using Al-Al electrodes was studied systematically at various variations, i.e., electrolysis time, electrolyte concentration, initial pH, coagulation speed, and electrolyte type. The results showed that the PVC microplastics removal efficiency reached 100% after electrolysis for 60 min, electrolyte concentration of 0.01 mol/L, initial pH of 7, coagulation speed of 500 rpm, the type of electrolyte used was NaCl at a flocculation speed. These optimum conditions also reduced the value of turbidity of wastewater samples from 1.39 ± 0.02 to 1.10 ± 0.05 NTU. The results of this study provide an engineering perspective in optimizing operational parameters for removing PVC microplastics in aquatic environments.
Characterization of Batik Waste Containing Synthetic Textile Dyes and The Artisan Awareness Regarding The Hazardous Batik Waste Hidayati, Yunin; Siswanto, Dian; Rumhayati, Barlah; Retnaningdyah, Catur
Biosaintifika: Journal of Biology & Biology Education Vol. 16 No. 2 (2024): August 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v16i2.2325

Abstract

Synthetic textile dyes in the Tanjung Bumi batik coloring process in Madura, Indonesia, have been used extensively for decades, raising environmental concerns due to hazardous wastewater. This research aims to evaluate the quality characteristics of synthetic textile dye wastewater, assess batik artisans' awareness of batik waste hazards, and analyze the interaction between these factors. Wastewater samples were collected from four locations with two repetitions each. Thirty-seven batik artisans participated in a survey. The wastewater analysis included measurements of BOD5, COD, pH, TSS, phenol, Cr, NH3-N, sulfide, and oil and grease. The survey assessed the artisans' use of synthetic dyes and their awareness of environmental hazards. The results showed that the toxic substance levels in Tanjung Bumi batik waste exceed the quality standard thresholds for textile waste. Survey findings indicate that 100% of respondents use synthetic textile dyes, 83.78% dispose of waste without processing, and 91.89% are unaware of the hazards posed by synthetic textile dyes. There is a direct correlation between the artisans' low awareness of the negative impacts of waste and their lack of environmental preservation practices. The novelty of this research lies in its dual evaluation of chemical wastewater characteristics and socio-environmental awareness among artisans. This approach highlights the urgent need for educational interventions and improved waste management practices. The implications are significant for developing sustainable batik production methods and enhancing environmental awareness, contributing to broader societal benefits.
Adsorption of Iron by Fly Ash Adsorbent of Coal Irawan, Candra; Atikah, Atikah; Rumhayati, Barlah
The Journal of Pure and Applied Chemistry Research Vol. 3 No. 3 (2014)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.667 KB) | DOI: 10.21776/ub.jpacr.%y.03.03.154

Abstract

This research has investigated adsorption of Fe with using fly ash adsorbent. Phases of adsorption of Fe isactivatedwithH2SO4afterthat thefly ashwere characterizedby usingXRF, FTIRandSEM. Determination ofoptimum conditionsonthe adsorptionof Fewithadsorbentmassvariations, variations incontact time, pHvariationandvariationconcentration andadsorptionisothermstudy. Resulth showthat theadsorptionof Fein optimum conditionoccurs inadsorbentmass of2.5g, for 60minutescontact timewithpH4at a concentration of20ppm. The results alsoable toadsorpup to94% Fe. The adsorption of Fe with using fly ashadsorbentwas more fitted to theLangmuirmodel than to Freundlich model <w:LsdException Locked="false" Priority=
HARDNESS WATER REMOVAL BY USING CELLULOSE PAPYRUS FIBERS (Borrasus flabelifer L) FROM EAST NUSA TENGGARA MODIFIED WITH CITRIC ACID Solo, Anna Apriani Maniuk; Rumhayati, Barlah; Masruri
Media Konservasi Vol. 28 No. 2 (2023): Media Konservasi Vol 28 No 2 Agustus 2023
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/medkon.28.2.129-134

Abstract

Hardness water removal using adsorbent ester cellulose citrate from Papyrus Fibers (Borrasus flabelifer L) from East Nusa Tenggara modified with citric acid has been done. The Adsorbent was modified with 0.6 mol/L citric acid at 120o C for one-half hour. The Adsorbent ester cellulose citrate from papyrus fibers (Borassus flabelifer L) has an ester carbonyl functional group (C=O) and O-H alcohol active group (O-H), which react to Ca2+ and Mg2+ from hardness water. The effects of adsorption conditions, such as contact time, pH, and hardness water concentrations were studied. The result shows that ester cellulose citrate from Papyrus Fibers (Borrasus flabelifer L) can remove hard water. The best condition for adsorption hardness water using ester cellulose citrate adsorbent from papyrus fibers in 6 h contact time with pH 6 and 250 mg/L as CaCO3 hardness water. The hardness of water removal is up to 71%. Key words: adsorbent; agricultural waste; citric modified; estererification; hardness water
Bioadsorption of Copper(II) Using Halmahera Specific Marine Algae (Sargassum turbinarioides) Encapsulated Calcium Alginate Sanawi, Dede Ardiansyah Takdir Abubakar; Rumhayati, Barlah; Fardiyah, Qonitah
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99090

Abstract

This study investigated the conditions for bioadsorption of copper(II) using Halmahera marine algae (Sargassum turbinarioides) encapsulated with calcium alginate by batch method. Physicochemical parameters of biosorption, including contact time, biosorbent mass, pH, and copper(II) concentration, were studied to determine the percentage of copper(II) adsorbed. The maximum percentage of copper(II) bioadsorption was 96.4% under the optimum bioadsorption conditions with a contact time of 90 min, a biosorbent mass of 2 g, a solution pH of 5, and a copper(II) concentration of 60 mg/L. The bioadsorption isotherm study showed that the Langmuir model is more suitable for modeling copper(II) bioadsorption, while the bioadsorption kinetics study showed a pseudo-second-order kinetic model. Characterization of the biosorbent using FTIR showed that the biosorbent has active functional groups such as O–H, C–H, S–H, C=O, S=O, and C–O–C, which act as metal ligands, and SEM characterization showed morphological changes in the biosorbent before and after the copper(II) bioadsorption process.
The Study of Removal of Remazol Red with Biomaterial Paras Stone and Opuntia ficus-indica by Coagulation-Flocculation Hulwati, Siti; Fardiyah, Qonitah; Rumhayati, Barlah; Anggraini, Vita Dwi
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.102760

Abstract

The rapid progress of the textile industry sector has an impact on the environment by producing dye waste. The use of synthetic coagulants in processing textile industry waste containing azo dyes can cause residues that are detrimental to the environment. In this research, a technique for processing azo dye was done using natural coagulants. The use of natural coagulants provides several advantages, such as being eco-friendly, abundant, and cost-efficient. The potential of paras stone and Opuntia ficus-indica biomaterials as natural coagulants and flocculants for removing remazol red dye was thoroughly investigated under various conditions, including coagulant dose, the speed of coagulation, and the optimal initial pH of the test solution. The removal of remazol red dye was quantitatively analyzed using a UV-vis spectrophotometer at a wavelength of 520 nm. Findings from the research revealed that the removal efficiency of remazol red dye reached 96.70% with a coagulant dose of 2.75 g of paras stone and 2.00 g of O. ficus-indica at an optimal coagulation speed of 500 rpm and a pH of 4 for the testing solution. The results of this study provide an engineering perspective on optimizing operational parameters for removing remazol red in aquatic environments.
Phosphate Accumulation Using MgO-Fe3O4/Agarose/Oxalic Acid Gel as a Diffusive Gradient in Thin Films (DGT) Binding Layer Dinira, Layta; Rafif, Sullahudin Ahmad; Ulayya, Salwa; Rumhayati, Barlah; Darjito, Darjito; Sabarudin, Akhmad
EduChemia: Jurnal Kimia dan Pendidikan Vol 10, No 1 (2025)
Publisher : Department of Chemistr Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v10i1.29113

Abstract

Monitoring phosphate concentration in waters is critical because excessive phosphate can lead to the death of aquatic organisms. Phosphate can be monitored via a passive sampler called Diffusion Gradient in Thin Films (DGT). This study combines MgO and Fe3O4 impregnated in agarose crosslinked with oxalic acid to accumulate phosphate from the solution as a DGT binding gel. The parameters observed in this study were MgO/Fe3O4 mass ratio (1:3, 1:1, 3:1), accumulation time (20, 40, 60, 120, 240, and 1440 min), phosphate concentration (0.2, 0.4, 0.6, 0.8, and 1 mg/L) and pH (4, 5, 6, 7, and 8) on phosphate accumulation. XRD pattern confirmed that the adsorbents used were MgO and Fe3O4. SEM analysis showed that the gel had an average pore size of 31.78 μm, and the adsorbents were evenly distributed. Gel with MgO/Fe3O4 mass ratio 3:1 can adsorb phosphate up to 97.19 ± 0.36%. The phosphate accumulation reached optimum after a minimum adsorption time of 4 hours and when the phosphate concentration in the solution was 0.4 mg/L. The solution's pH had no significant effect on phosphate accumulation. This study shows that MgO-Fe3O4/agarose/oxalic acid gel is an excellent binding gel to accumulate phosphate from water.
Koefisien Difusi Ion Fosfat dalam Gel Asam Sitrat-Agarosa yang Digunakan dalam Gradien Difusif pada Sampler Pasif Film Tipis (DGT) An-Nufuus, Digwanggi Arum Tazkiyatu; Rumhayati, Barlah; Fardiyah, Qonitah; Mardiana, Diah; Andayani, Ulfa; Dinira, Layta
Jurnal Penelitian Pendidikan IPA Vol 9 No 8 (2023): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i8.3593

Abstract

In this research, the diffusion coefficient of phosphate ions in agarose-citric acid diffusive gel has been studied. The agarose-citric acid diffusion layer was prepared by mixing 1.5% agarose solution with the addition of citric acid solutions at various concentration. The diffusive gel was casted between two glass plates which were separated using a spacer of 0.1 cm thickness and clamped together in the three sides. Gel was formed for 15 minutes in an oven at 40oC. The diffusion coefficient then was calculated using Fick's First law formula. Gel that produced with addition of 0.45% citric acid absorbed more water during immersion in water for 3 hours for facilitating phosphate diffusion. Swelling degree of the agarose citric acid diffusive gels was not affected by the storing solution condition either in water or in NaNO3 0.1 M. Coefficient diffusion of phosphate in the agarose-citric acid diffusive gel was 1.009×10-7 cm2s-1, less than the diffusion in the pure agarose gel 1.367×10-7 cm2s-1. The diffusion is affected by the ionic strength of solution. Phosphate diffusion coefficient is higher in the phosphate solution with addition of 2 mgL-1 nitrate. Increasing the ionic strength causes lower phosphate diffusion coefficient because the electrostatic attractive and repulsive force
New Modification of Natural Coagulants and Flocculants from Papaya Seeds (Carica Papaya L.) and Aloe Vera Gel in The Removal of Remazol Yellow Dye Wijaya, Khalida; Fardiyah, Qonitah; Rumhayati, Barlah
Jurnal Kartika Kimia Vol 8 No 2 (2025): Jurnal Kartika Kimia (In Progress)
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v8i2.1064

Abstract

A new modification of natural coagulant and flocculant from papaya seeds Carica papaya L. and aloe vera gel has been developed in this study to remove Remazol Yellow dye. The research parameters studied included the initial concentration of the test solution, pH, and stirring speed during the coagulation process. The initial concentration of the test solution varied from 10 to 50 mg/L, the pH ranged from 1 to 6, and the stirring speed was 650 to 1050 rpm during the coagulation phase. The coagulation and flocculation results were characterized using an FTIR spectrophotometer. The results showed that the optimum conditions were an initial concentration of 30 mg/L at pH 2 and a stirring speed of 950 rpm, resulting in the highest removal effectiveness of 97.55%. The results of FTIR spectrophotometry characterization showed that the sulfonate group -SO₃⁻ in Remazol Yellow had been removed, indicating that the protonated groups -NH₃⁺ and -COOH₂⁺ in papaya seeds and the anionic groups of the dye had electrostatic interactions. This study shows that the modification of papaya seeds and aloe vera gel as natural coagulants and flocculants shows sustainable potential for azo dye-based textile wastewater treatment.
Penyaring Air Keran untuk Pemenuhan Air Bersih di Desa Talangsuko, Kecamatan Turen, Kabupaten Malang Layta Dinira; Mulyasuryani, Ani; Rumhayati, Barlah; Sabarudin, Akhmad
Rengganis Jurnal Pengabdian Masyarakat Vol. 5 No. 2 (2025): November 2025
Publisher : Pendidikan Matematika, FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/rengganis.v5i2.877

Abstract

Desa Talangsuko, Kecamatan Turen, Kabupaten Malang is classified as an area with moderate risk of perilaku hidup bersih dan sehat (PHBS), indicating that PHBS management is not yet optimal. This community service aimed to improve household water management in Desa Talangsuko by implementing filtration and adsorption technology through tap water filters. The activities included water sampling, tap water filter design, education on clean water through counseling and hands-on demonstrations, and installation of tap water filters. The results showed an improvement in household water quality after the use of the tap water filters, as indicated by the reduction of chemical contaminants such as fluoride, nitrate, and water hardness. The counseling and hands-on demonstrations increased community awareness about clean water and the importance of regularly replacing water filter materials. These results suggest that this program demonstrated a positive impact on household water management in Desa Talangsuko.
Co-Authors Akhmad Sabarudin Alvin Juniawan An-Nufuus, Digwanggi Arum Tazkiyatu Anggraeny, Baiq Octaviana Dwi Anggraini, Vita Dwi Ani Mulyasuryani Arie Srihardyastutie Asih Hajaranti Bambang Ismuyanto Candra Irawan Catur Retnaningdyah Darjito Darjito Diah Mardiana Dian Siswanto Dwi Oktavianti Hulwati, Siti Ika Diah Safitri Ika Rosemiyani Layta Dinira Layta Dinira Masruri Nashiroh, Ni'matun Nongnoot Wongkaew Qonitah Fardiyah Rafif, Sullahudin Ahmad Ramadani, Azaria Ivana Risti, Sandria Gita Rossy Dwi Adhi Pratiwi RR. Ella Evrita Hestiandari Sabarudin, Akhmad Sanawi, Dede Ardiansyah Takdir Abubakar Solo, Anna Apriani Maniuk Sulistiyaningrum, Dwi Rakhmatun Ulayya, Salwa Ulfa Andayani, Ulfa Vita Tria Mardila Wijaya, Khalida Yunin Hidayati