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Desy Kurniawati
Universitas Negeri Padang
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Journal : Jurnal Periodic

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Adsorpsi Zat Warna Rhodamine B Dengan Karbon Aktif Kulit Durian sebagai Adsorben Azhma Ulya; Edi Nasra; Ali Amran; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 2 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1193.301 KB) | DOI: 10.24036/p.v11i2.113371

Abstract

Rhodamine, B colorant is one of the dyes present in the waste coming from the textile/dyeing industry. Rhodamin B dyes found in waters can cause damage to ecosystems both animals and plants, so a method is needed to overcome the impact of pollution by Rhodamin B waste. One of the most efficient methods is the adsorption method using activated carbon from Durian peels. Adsorption,process is done by using a variation,of pH (2, 3, 4, 5 and 6), and variation of stirring speed (50, 100, 150, 200, 250 rpm). The results showed the absorption capacity at optimum conditions for the absorption of Rhodamine B at pH 4 and stirring speed at 200 rpm with absorption capacity of 24,643 mg/g with absorption percentage 96,0292%.
Analisis Proksimat Karbon Aktif Kulit Langsat Annisa Nabila Rahma; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116189

Abstract

Activated carbon is made from various raw materials, one of which is langsat leather. One of the uses of langsat peel activated carbon is as an adsorbent. The langsat peel activated carbon is made by carbonization process at 400 °C in a furnace. Activated carbon that has been carbonized will be activated with 0.1 M HNO3 for 2 hours. Proximate analysis which includes water content, ash content, volatile matter content, bonding carbon content and iodine uptake. Overall, the proximate analysis of activated carbon from langsat peel has a value that meets the requirements of SNI No. 06-3730-1995. Keywords — langsat peels, activated carbon, activation
Adsorpsi Ion Logam Cd2+ dengan Menggunakan Cangkang Telur Ayam Ras Nova Fitriani; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116127

Abstract

The growing industrial growth has resulted in more and more liquid waste containing heavy metals. Therefore we need a way to reduce these heavy metals. One way is adsorption using eggshells. The purpose of this study was to determine the optimum conditions for the adsorption of Cd2+ metal ions on the effect of variations in pH and stirring speed and to determine the adsorption capacity of eggshells for Cd2+ metal ions. This study used the batch method with variations in pH and stirring speed. The optimum conditions obtained from each variation were at pH 4, and stirring speed at 250 rpm. The adsorption capacity at the variation of pH was 2,3875 mg/g at 42,18% and adsorption capacity at variation in stirring speed was 3,3 mg/g at 24,01%.
Optimasi Adsorpsi Ion Logam Cu2+ dengan Menggunakan Cangkang Telur Ayam Ras Nesya Febi Utami; Edi Nasra; Desy Kurniawati; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115915

Abstract

adsorption is a method of waste treatment that has the potential to remove toxic heavy metals. One of the factors that influence the occurrence of the adsorption process is the presence of a biological material called a biosorbent. The adsorption method is a method of absorbing heavy metal contamination in liquid waste that is very efficient and effective, as well as easy and cheap economically because of the use of biomaterials that are very cheap and can be regenerated. Chicken egg shell contains Calcium Carbonate (CaCO3) of 98.41% and has natural pores of 10,000 to 20,000 so it is estimated that it can absorb solutes. Based on the known mineral composition, chicken egg shells are composed of CaCO3 (98.41%), Ca3(PO4)2 (0.75%), and MgCO3 (0.84%). So it can be seen that chicken egg shells have a high calcium carbonate content, where calcium carbonate is a polar adsorbent. The optimum conditions for each variable in contacting broiler egg shells that have been activated with Cu2+ metal ions are optimum at pH 4, concentration of 250 ppm.
Silika Gel Termodifikasi Dimetilamin Sebagai Penyerap Anion Fosfat Delfitri Delfitri; Budhi Oktavia; Desy Kurniawati; Umar Kalmar Nizar
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.116103

Abstract

Silica gel is one type of dry silica gel which is widely used as an adsorbent. Silica has the ability to absorb because it has two active site groups that can be activated, namely a silanol group and a siloxane group. This modification was carried out to increase the ability of silica to absorb ions, one of which was phosphate anion. In waters, very high levels of phosphate anion can disrupt the marine biota ecosystem because it can cause uetrophication or decreased oxygen levels that enter the waters. The modifier compound used is dimethylamine (DMA). Silica and dimethylamine can bind to several linking compounds, namely glycidopropyltrimethoxylan (gptms). The modified silica was characterized by FTIR and the absorption results were analyzed using a UV-Vis spectrophotometer. The results of the comparison of the absorption capacity of phosphate anions after modification are greater than before modification, where the absorption capacity of silica before modification is 1,2601 mg/g with an absorption percentage of 54,46% and silica after modification is 1.9686 mg/g with an absorption percentage of 1,9686 mg/g. 85,08%.Keywords — Silica gel, Modification, Dimetilamine, Phosphate Anion
Studi Kompleks Assosiasi Pb(II) Menggunakan KI dan Methylene Blue Fadilla Yuri Merti; Edi Nasra; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.117050

Abstract

Research has been carried out on the study of the Pb(II) association complex using KI and methylene blue. This study aims to find the optimum conditions for the Pb(II) association complex such as optimum time, Iodidae concentration, pH, and methylene blue concentration. The measurement methods used are UV-Vis spectrophotometry and AAS (Atomic Absorption Spectrophotometer). Pb(II) is reacted with excess Iodidae to form an anion complex (PbI42-). The anion complex formed is then reacted with a methylene blue (MB+) cation complex to form an association complex [MB]2[PbI4]. From the results of the study, it was found that the optimum conditions for the formation of anion complexes (PbI42-) at 2 hours, a concentration of 0.4 M with an absorbance of 0.1069 A at anion wavelength of 266 nm. While the optimum conditions for the association complex [MB]2[PbI4] occurred at a wavelength of 665 nm with an absorbance of 0.6119 A, pH 3 with an absorbance of 0.9675 A and a concentration of 0.0012 % methylene blue with an absorbance of 0.1266 A. The association complex The resulting product was contacted with Pb(NO3)2 at a concentration of 0.01 ppm and was successfully concentrated by obtaining a concentration of 0.6387 ppm and an absorbance value of 0.0092 A. So that a concentration factor of 63.87 times was obtained.
Optimasi Penyerapan Anion Klorida Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina Nur Hafni Hasibuan; Budhi Oktavia; Edi Nasra; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.116185

Abstract

Ion chloride (Cl-) is an anion that can combine with several cations to form a water-soluble salt. High chloride content in water can accelerate the rusting process on metal. So that in this research the aim is to determine the optimum conditions for the absorption of chloride anions using silica. Adsorption using silica is able to absorb anions. However, modifications are needed to improve silica adsorption. In this study, Dimethylamine was used as a modifier and Glisidoxypropyltrimethoxysilane as a bridge between silica and dimethylamine. To determine the changes in the functional groups of silica, silica-GPTMS, silica-GPTMS DMA, and silica-GPTMS DMA with chloride ions, the FTIR test was carried out. The absorption step was carried out by varying the pH (6,7,8,9, and 10), contact time (30,60,90,120, and 150 minutes), and concentration (5, 10, 15, 20, and 25 mg/L). . The results showed that the optimum conditions for absorption occurred at pH 7, contact time of 120 minutes, and a concentration of 20 mg/L with an absorption capacity of 0.250825 mg/g.
Desorpsi Anion Klorida (Cl-) Dari Adsorben Silika Mesopori Template CTAB (Cetiltrimetilammoniumbromida) Termodifikasi Dimethylamine Fadhilatu Zikra; Budhi Oktavia; Ananda Putra; Desy Kurniawati
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Mesopore silica was prepared using sodium silica as a precursor and CTAB as a templating agent. However, silica has limitations in adsorption and desorption of chloride anions. Therefore, it is necessary to modify it to improve the action of mesopore silica. This study used DMA (dimethylamine) as a modifier with glycidoxypropyltrimethoxysilane (GPTMS) linking compound. Adsorption was carried out by injecting the adsorbate solution into the column containing the adsorbent at pH 7, and the optimum concentration was 20 mg/L. Furthermore, desorption was carried out by comparing the best desorption agents using acid desorption agents, namely nitric and sulfuric acids. The study showed that the percentage of nitrate desorption (95,29%)> sulfate (47,64%). After obtaining the best type of desorbing agent, desorption was carried out using nitrate with a concentration variation of (0,02; 0,04; 0,06; 0,08; 0,1) M. The optimum conditions for desorption of chloride anions on the modified mesoporous silica adsorbent were at 0,06 M.
Pengaruh Massa Biosorben Terhadap Penyerapan Ion Logam Cu(II) Oleh Ekstrak Pektin dari Kulit Buah Kedondong (Spondias dulcis) Elinda Fithriana; Trisna Kumala Sari; Indang Dewata; Desy Kurniawati; Romy Dwipa Yamesa Away
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118466

Abstract

Several industrial activities such as fertilizer industry, mining, battery, electronics and machinery can cause heavy metal pollution and one of them is Cu(II) heavy metal. At high levels of metal concentrations of Cu(II) will be very dangerous for the environment and living things, so it is necessary to find a solution to overcome the problem of metal pollution of Cu(II) is. One method that can be used is the biosorption method. In this study, pectin extract from kedondong fruit peel was used as a biosorbent. This research was conducted to determine the optimum mass of biosorbent in the biosorption process. Then the pectin characterization was carried out the Fourier Transform Infra Red instrument, then the absorbed Cu(II) metal content was determined using the Atomic Absorption Spectroscopy instrument. From this study, the optimum mass of biosorbent was 0.1 gram with an absorption capacity of 2,940 mg/g.
Optimasi Penyerapan Malachite Green Menggunakan Biosorben Kulit Matoa (Pometia pinnata) dengan Metode Batch Dwi Hartati; Desy Kurniawati; Edi Nasra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118255

Abstract

This study aims to determine the optimum conditions for absorption of malachite green dye waste using matoa fruit peel biosorbent (Pometia pinnata) using a batch method with variations in particle size and contact time which will be tested with UV-Vis spectrophotometer instruments. Before being used as a biosorbent, matoa skin was activated first using 0.01 M HNO3. Activation of the biosorbent was carried out to improve the performance of the biosorbent because activation can enlarge the pores and volume of the biosorbent as well as the impurities contained in the biosorbent. The results showed that the optimum conditions for variations in particle size were 106 µm with an absorption capacity of 44.08 mg/g and a contact time of 90 minutes with an absorption capacity of 46.67 mg/g.
Co-Authors Afdina Afdina Ali Amran Ananda Putra Annisa Nabila Rahma Aroma Karmila Azhma Ulya Berliana Salsabila Budhi Oktavia Delfitri Delfitri Deski Beri Deva Indriyani Dewi Rika Aryani Dwi Hartati Edi Nasra Elinda Fithriana Fadhilatu Zikra Fadilla Yuri Merti Fauzan Aulia Akbar Fauzana Gazali Hardeli Hardeli Hardeli Hary Sanjaya Hesty Parbuntari Indang Dewata Latisma Latisma Melindra Mulia Melindra Mulia Mufi Nasda Nesya Febi Utami Niza Lian Pernadi Nofrianto Nofrianto Nova Fitriani Nur Hafni Hasibuan Rahmi Eka Witri Riga Riga Romy Dwipa Yamesa Away Sri Benti Etika Suryelita . Syamsi Aini Trisna Kumala Sari Umar Kalmar Nizar Yani Puspita Yani Yeni, Isra Yerimadesi