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All Journal Jurnal Riset Kimia Indonesian Journal of Chemical Science and Technology
Desy Kurniawati
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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 1 
Effect Of Biomass Dosage on Biosorption Malachite Green Using Immobilized Langsat Shell (Lansium Domesticum Corr) Niswatul Inayah; Desy Kurniawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43177

Abstract

Malachite green dye waste is one of the wastes that is genotoxic and carcinogenic to humans. Biosorption is an effective process for the removal and recovery of Malachite green dye waste from aqueous solutions. In this study, the biomass used was a langsat shell which had been immobilized with sodium silicate. The obtained biosorbents were characterized using Fourier Transform Infra-Red (FTIR). In this research, we determine the effect of biomass dosage on biosorption Malachite green using the column method. The results showed that the optimum conditions for absorption occurred at biomass dosage 2 gram . The maximum biosorption efficiency of 96,85%
Effect of Contact Time on Biosorption of Pb(II) Metal Ions Using Biosorbent from Durian Peel (Durio zibethinus L) Esti Ramadhani; Desy Kurniawati; Fitri Amelia; Ananda Putra
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43174

Abstract

Lead metal (Pb2+) is a heavy metal that is dangerous and has high toxicity. Pb2+ metal comes from industrial waste such as electroplating, paint, and the textile industry so it can find air. An effective, efficient, and economical method to overcome air contact with the biosorption method. Pb2+ metal ion biosorption using durian peel (Durio zibethinus L) as biosorbent. The purpose of this study was to determine the optimal conditions for the absorption of Pb2+ metal ions using the batch method with variations in speed and stirring time. The results showed that the optimal condition for Pb2+ absorption occurred at a contact time of 60 minutes with an absorption capacity of 33.6163 mg/g.
Effect of Flow Rate on Adsorption Cadmium Ion (II) Using Activated Carbon of Langsat Shell (Lansium Domesticum Corr) Farras Shafa Nabila; Desy Kurniawati
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 1 (2023): JANUARY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i1.43175

Abstract

Cadmium is one of the dangerous heavy metals contained in industrial wastewater whose presence needs to be addressed. Adsorption is one method that can be used to reduce the levels of heavy metal ions contained in wastewater. Langsat peel activated carbon is used as an adsorbent to adsorb cadmium metal because it is easy to obtain and its use is still minimal in the community. The langsat peel was made into activated carbon with HNO3 activator as a metal ion absorber Cd2+ using the column method. The activated carbon obtained has been tested for quality according to the Indonesian National Standard (SNI) No.06-3730-1995. In this study, we determined the effect of flow rate on metal cadmium absorption. The results showed that the activated carbon met the quality standards set by SNI and the optimum value of Cd2+ metal ion adsorption was at a flow rate of 1 ml/min.
The Extracted Pectin from Ambarella Fruit Peel (Spondias dulcis) as Biosorbent in Adsorption of Cu(II) Metal Ions Trisna Kumala Sari; Elinda Fithriana; Indang Dewata; Desy Kurniawati; Romy Dwipa Yamesa Away
Jurnal Riset Kimia Vol. 14 No. 2 (2023): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v14i2.608

Abstract

Heavy metals are known to seriously injure land plants and animals, including humans, as well as marine species when present in contaminated water. For the batch adsorption technique used in this study, Cu(II) ions were removed from an aqueous solution using an inexpensive  environmentally friendly adsorbent prepared from the extracted pectin of ambarella fruit peel. The functional groups of the extracted pectin were studied using Fourier Transform Infrared Spectroscopy (FT-IR). Operational conditions like pH, contact time, and initial adsorbate concentration were investigated. FTIR characterization showed that pectin was successfully extracted from ambarella fruit peel with the appearance of the peaks at 3331.36 cm-1, 2924.02 cm-1, 1727.38 cm-1, 1626.20 cm-1, 1329.31cm−1, 1232.43cm−1, 994.18 cm−1 and these peaks have similar characteristic with a commercial pectin. The maximum uptake of Cu(II) ions was obtained at a pH of 4, a contact time of 90 min, an initial metal concentration of 150 ppm. The extracted pectin has an adsorption capacity of 6.5860 mg/g for the removal of Cu(II) ions from aqueous solution under the optimum adsorption conditions. In addition, the data obtained from contacting the extracted pectin of ambarella fruit peel in Batang Arau River water showed an adsorption capacity of 0.0376 mg/g. Therefore, the pectin that was extracted from the peel of the ambarella fruit could be used to filter out Cu(II) ions from aqueous solutions.
Co-Authors Ananda Putra Elinda Fithriana Esti Ramadhani Farras Shafa Nabila Fitri Amelia Indang Dewata Niswatul Inayah Romy Dwipa Yamesa Away Trisna Kumala Sari