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ADSORPSI RHODAMIN B DENGAN ADSORBEN KITOSAN SERBUK DAN BEADS KITOSAN Kurniasih, Mardiyah; Riapanitra, Anung; Rohadi, Anas
Sains & Matematika Vol 2, No 2 (2014): April, Sains & Matematika
Publisher : Sains & Matematika

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Chitosan is a biopolymer that has adsorption ability toward dye substances due to its amino and hydroxyl functional groups. Thisstudy aimed to synthesize chitosan and chitosan beads from jerbung shrimp shell, and to test their adsorption ability on rhodamine Bdye. The chitosan and chitosan beads product of the synthesis were characterized using Fourier Transform Infra-Red Spectrophotometer(FTIR) as well as the determination of water content, ash content, and swelling effect. The adsorption ability of chitosan and chitosanbeads on rhodamine B was tested using the parameters of maximum wavelength as well as the effect of variation of pH and contact time.The results of the study showed that the synthesis gave result to chitosan and chitosan beads with water content of 4.45% and 6.84%, ashcontent of 0.1% and 2.83%, and the swelling effect of 143.43 and 94.05%, respectively. Chitosan and chitosan beads adsorb rhodamineB optimally at pH 4 and 3 with a contact time of 120 and 180 minutes, respectively at a maximum wavelength of 554.2 nm.

Adsorpsi Rhodamin B dengan Adsorben Kitosan Serbuk dan Beads Kitosan Kurniasih, Mardiyah; Riapanitra, Anung; Rohadi, Anas
Sains & Matematika Vol 2, No 2 (2014): April, Sains & Matematika
Publisher : Sains & Matematika

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

Chitosan is a biopolymer that has adsorption ability toward dye substances due to its amino and hydroxyl functional groups. Thisstudy aimed to synthesize chitosan and chitosan beads from jerbung shrimp shell, and to test their adsorption ability on rhodamine Bdye. The chitosan and chitosan beads product of the synthesis were characterized using Fourier Transform Infra-Red Spectrophotometer(FTIR) as well as the determination of water content, ash content, and swelling effect. The adsorption ability of chitosan and chitosanbeads on rhodamine B was tested using the parameters of maximum wavelength as well as the effect of variation of pH and contact time.The results of the study showed that the synthesis gave result to chitosan and chitosan beads with water content of 4.45% and 6.84%, ashcontent of 0.1% and 2.83%, and the swelling effect of 143.43 and 94.05%, respectively. Chitosan and chitosan beads adsorb rhodamineB optimally at pH 4 and 3 with a contact time of 120 and 180 minutes, respectively at a maximum wavelength of 554.2 nm.

Determination of Cu and Pb concentrations based on urease activity inhibition of Durio zibethinus L. seeds Zusfahair, Zusfahair; Fatoni, Amin; Ningsih, Dian Riana; Riapanitra, Anung
Molekul Vol 16, No 2 (2021)
Publisher : Universitas Jenderal Soedirman

The determination of heavy metal concentrations has been carried out using sophisticated instruments, and therefore a simple and reliable alternative method is needed as a comparison. The study aimed to determine Cu and Pb concentration of standard solution using the urease activity inhibition method ofÂ Durio zibethinusÂ L.Â Â seeds.Â Â The research started with urease extraction fromÂ DurioÂ D.Â zibethinusÂ L.Â seeds. The activity of the obtained extract was determined using the Nessler method. The optimum substrate concentration was also determined. Urease activity inhibition was carried out using various metal solution concentrations, which continued by plotting a log graph of urea concentration vs. %inhibition. The obtained graph would then determine the metal concentration in a synthetic water sample.Â The data was then compared to the measurement, determined by the Atomic Absorption Spectrophotometry (AAS) method.Â Results of the study showed that the urease activity ofÂ D. zibethinusÂ L.seeds was 296.774 U/mL. Urease activity was optimum at a urea concentration of 0.3 M. The comparisonÂ Cu, and PbÂ concentration determination using the urease inhibitory activity and AAS methods showed no significant difference at 95% confidence level. This research showed that urease ofÂ D. zibethinusÂ L. seed could be used to determine Cu and Pb's concentration based on its inhibiting activity.

The Surface Modification of Ag3PO4 using Tetrachloroaurate(III) and Metallic Au for Enhanced Photocatalytic Activity Uyi Sulaeman; Richo Dwi Permadi; Alfa Marcorius; Hartiwi Diastuti; Anung Riapanitra; Shu Yin
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.10863.707-715

The improvement of Ag3PO4 photocatalytic activity was successful by incorporating tetrachloroaurate(III) (AuCl4−) and metallic Au on the surface of Ag3PO4. The photocatalysts were synthesized using the coprecipitation and chemisorption method. Coprecipitation of Ag3PO4 was carried out under ethanol-water solution using the starting material of AgNO3 and Na2HPO4.12H2O. AuCl4− ion and metallic Au were incorporated on the surface of Ag3PO4 using a chemisorption method under auric acid solution. The photocatalysts were characterized using XRD, DRS, SEM, and XPS. The AuCl4− ion and metallic Au were simultaneously incorporated on the Ag3PO4 surface. The high photocatalytic activity might be caused by increasing the separation of hole and electron due to capturing photogenerated electrons by metallic Au and Au(III) as electron acceptors. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal Febiyanto Febiyanto; Agus Soleh; Muhammad Sofi Khoerul Amal; Mohammad Afif; Sukma Sewiji; Anung Riapanitra; Uyi Sulaeman
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 1 Year 2019 (April 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

The highly active photocatalyst of Ag3PO4 could be synthesized under ammonia solution using the facile co-precipitation method with the starting material of AgNO3 and Na2HPO4.12H2O. The variation of ammonia concentration was designed at 0.00, 0.05, 0.15, and 0.30 M. The products were characterized using X-ray diffraction, UV-diffuse reflectance spectroscopy, and scanning electron microscopy. The photocatalytic activities were evaluated using the Rhodamine B degradation under blue light irradiation. The effect of calcination, pH condition, and visible light source irradiation was carried out in the experiment. The highest photocatalytic activity was found in the sample prepared using the addition of ammonia solution at the concentration of 0.05 M. This photocatalytic activity was 4.13 times higher compared to the Ag3PO4 prepared without the ammonia. The effective condition of photocatalytic activity was achieved at the sample prepared without calcination, degradation at pH of 7 and under blue light irradiation.

Adsorpsi Rhodamin B dengan Adsorben Kitosan Serbuk dan Beads Kitosan Mardiyah Kurniasih; Anung Riapanitra; Anas Rohadi
Sains dan Matematika Vol. 2 No. 2 (2014): April, Sains & Matematika
Publisher : Universitas Negeri Surabaya

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

Chitosan is a biopolymer that has adsorption ability toward dye substances due to its amino and hydroxyl functional groups. Thisstudy aimed to synthesize chitosan and chitosan beads from jerbung shrimp shell, and to test their adsorption ability on rhodamine Bdye. The chitosan and chitosan beads product of the synthesis were characterized using Fourier Transform Infra-Red Spectrophotometer(FTIR) as well as the determination of water content, ash content, and swelling effect. The adsorption ability of chitosan and chitosanbeads on rhodamine B was tested using the parameters of maximum wavelength as well as the effect of variation of pH and contact time.The results of the study showed that the synthesis gave result to chitosan and chitosan beads with water content of 4.45% and 6.84%, ashcontent of 0.1% and 2.83%, and the swelling effect of 143.43 and 94.05%, respectively. Chitosan and chitosan beads adsorb rhodamineB optimally at pH 4 and 3 with a contact time of 120 and 180 minutes, respectively at a maximum wavelength of 554.2 nm.

FOTOREDUKSI Cd (II) MENGGUNAKAN KATALIS TiO2 DENGAN SENSITIZER KLOROFIL YANG DIAKTIVASI SINAR MATAHARI Uyi Sulaeman; Kapti Riyani; Anung Riapanitra; Dyah Indriastuti
Molekul Vol 2, No 1 (2007)
Publisher : Universitas Jenderal Soedirman

The photoreduction of Cd (II) has been investigated using thin layer catalyst of titanium dioxide and chlorophyll as sensitizer. Thin layer catalyst could be prepared by sol gel method deposited on glass slide. The treatments of experimental are: TiO2 catalyst using chlorophyll without sunlight illumination, TiO2 catalyst using chlorophyll with sunlight illumination and TiO2 catalyst with sunlight illumination. The concentration of Cd (II) in the solution is monitored every 30 minutes until 150 minutes illuminations by atomic absorption spectroscopy. The results showed that concentration of Cd (II) decreased reached to 45,53 % in TiO2 catalyst using chlorophyll with sunlight illumination at pH 5 after 150 minutes illumination and it decreased reached to 34.07% at pH 7 after 120 minutes illumination. Addition the chlorophyll to TiO2 catalyst increased photoreduction activities.

PEMANFAATAN ARANG BATOK KELAPA DAN TANAH HUMUS BATURRADEN UNTUK MENURUNKAN KADAR LOGAM KROM (Cr) Anung Riapanitra; Roy Andreas
Molekul Vol 5, No 2 (2010)
Publisher : Universitas Jenderal Soedirman

Waste containing hazardous and toxic chemical compounds into the environment leads to water pollution, soil and air. These chemical compounds will endanger human life and environment. One type of compound that may pollute the environment is chromium. The metal is commonly found in industrial waste such as from exhaust and industrial wastewater from etal plating company.The purpose of this research is to utilize coconut shell charcoal and soil humus as a low-cost and ready-made alternative material to reduce the concentration chromium (Cr) on wastewater. Humus was taken from Baturraden region and was isolated using NaOH extraction and was furthermore purified using mixtures of HF(aq): HCl(aq). Coconut shell charcoal was produced and was mixed with the humus. Adsorption process was carried out by batch method on variations of charcoal: humus composition, pH, and contact time. Humus soil was identified using infrared spectrophotometry (IR). Determination of chromium concentration was performed using atomic absorption spectroscopy (AAS).The purified humus yielded was 25.92% (w/w), with 34.18% moisture, and ash content of 18.09%. The results showed that the variation of composition ratio of 2:1 charcoal and humus produced the greatest percent reduction of 18.20%, and the optimum pH for the adsorption is 9. For the variation of contacts time, the optimum reaction time is at 180minutes with decreasing concentration of Pb up to 56.07%.

PENENTUAN WAKTU KONTAK DAN pH OPTIMUM PENYERAPAN METILEN BIRU MENGGUNAKAN ABU SEKAM PADI Anung Riapanitra; Tien Setyaningtyas; Kapti Riyani
Molekul Vol 1, No 1 (2006)
Publisher : Universitas Jenderal Soedirman

Dyes are widely used for colouring in textile industries, significant losses occur during the manufacture and processing of the product, and these lost chemical are discharged in surrounding effluent. Adsorption of dyes is an effective technology for treatment of wastewater contaminated by the mismanaged of different types of dyes. In this research, we investigated the potential of rice husk ash for removal of methylene blue dyeing agent in aqueous system. The aim of this research is to find out the optimum contact time and pH on the adsorption of methylene blue using rice husk ash. Batch kinetics studies were carried out under varying experimental condition of contact time and pH. An adsorption equilibrium condition was reached within 10 minutes and the optimum condition for adsorption was at pH 3. The adsorption of methylene blue was decreasing with decreasing the solution pH value.

SINTESIS NANOKOMPOSIT POLIANILIN/ZnO DENGAN METODE POLIMERISASI ANTARMUKA DAN UJI AKTIVITAS FOTODEGRADASINYA TERHADAP RHODAMIN B PADA CAHAYA TAMPAK Muhamad Wisnu Nugroho; Anung Riapanitra; Ponco Iswanto
Molekul Vol 10, No 2 (2015)
Publisher : Universitas Jenderal Soedirman

Sintesis nanokomposit polianilin/ZnO (PANI/ZNO) secara polimerisasi antarmuka dan uji fotodegradasinya pada senyawa Rhodamin B telah dilakukan. Garam Emeraldine dari PANI dan nanokomposit PANI disintesis secara polimerisasi antarmuka menggunakan dua fase pelarut organik/air. Hasil sintesis dikarakterisasi transisi elektronnya secara spektroskopi UV-Vis dan gugus fungsi yang terbentuk secara spektrofotomeri FT-IR. Karaktersisasi menggunakan UV-Vis DRS menunjukkan bahwa PANI, PANI/ZnO 5% dan PANI/ZnO 10% memiliki nilai energi band gap sebesar 2,0 eV. Analisis secara SEM menunjukkan berkurangnya ukuran partikel seiring penambahan ZnO. Penentuan berat molekulPANI adilakukan menggunakan viskosimeter Ostwald menunjukkan berat molekul PANI sebesar 2835,03 g/mol. Uji fotodegradasi pada lampu tungsten selam 240 menit mendapatkan hasil penurunan konsentrasi Rhodamin B berturut-turut sebesar 67.9% 85.09% and 80.24% untuk PANI, PANI/ZnO 5% dan PANI/ZnO 10%

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