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All Journal Indonesian Journal of Chemical Science ALCHEMY Jurnal Penelitian Kimia Communications in Science and Technology SEMAR Molekul: Jurnal Ilmiah Kimia ENVIRO: Journal of Tropical Environmental Research
Candra Purnawan
Department of Chemistry, University of Sebelas Maret, Jl. Ir. Sutami No. 36 A, Surakarta 57126
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Transportation

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SINTESIS KITOSAN-ARGININ DENGAN KATALIS PIRIDIN DAN UJI AKTIVITAS ANTIBAKTERI TERHADAP Escherichia coli Purnawan, Candra; Purwanto, Purwanto; Martini, Tri; Kusumaningtyas, Triana; Ambarrukmi, Asnani Ratna
Indonesian Journal of Chemical Science Vol 3 No 2 (2014)
Publisher : Indonesian Journal of Chemical Science

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

Abstract

Telah dilakukan penelitian tentang sintesis kitosan-arginin dengan katalis piridin dan uji aktivitas antibakteri terhadap Escherichia coli. Tujuan penelitian ini adalah mempelajari pengaruh penambahan massa arginin pada kitosan dan variasi suhu reaksi dalam sintesis kitosan-arginin terhadap aktivitas antibakteri Escherichia coli serta membandingkan kitosan dan kitosan-arginin terhadap aktivitas antibakteri Escherichia coli. Sintesis kitosan-arginin dilakukan dengan perbandingan massa (b/b) kitosan:arginin 1:0,5; 1:1; 1:1,25; 1:1,5; 1:2 dan variasi suhu reaksi 60 °C, 80 °C, 100 °C menggunakan katalis piridin untuk mengaktifkan gugus karbonil arginin. Karakterisasi kitosan-arginin meliputi Spektroskopi Sinar Merah (FT-IR), Analisis Termal (TGA-DTA) dan % Nitrogen dengan metode Kjeldahl. Uji aktivitas antibakteri menggunakan metode Optical Density (OD) λmaks 600 nm pada jam ke-0, 3, 6, 9, 12, 24 dan 48. Hasil penelitian menunjukkan bahwa penambahan massa arginin dan variasi suhu reaksi sintesis kitosan-arginin tidak menunjukkan perbedaan signifikan terhadap daya hambat bakteri. Namun ketika aktivitas antibakteri kitosan jam ke-48 menurun, aktivitas antibakteri kitosan:arginin 1:1,5 pada 80 ᵒC masih meningkat.
The Effect of Chloro Acetic Acid Concentration and Temperature Reaction of Carboxymethyl Chitosan Formation on Cation Exchange Capacity and Thermal Stability Purnawan, Candra; Pramono, Edi; Purwanto, Purwanto
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 1 (2014): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.1.7.31-39

Abstract

The research on the effect of chloro acetic concentration and temperature reaction of carboxymethyl chitosan formation on cation exchange capacity and thermal stability of polymer have been done. Carboxymethyl chitosan was synthesized by reaction of chitosan and chloro acetic acid with NaOH as catalyst. Polymer was characterized by Fourier Transform Infrared Spectrofotometer, cation exchange capacity test, and thermal analysis with thermogravimetric method. Carboxymethyl chitosan has strong FTIR adsorption of carboxyl group (-COO-) in 1606,70 cm-1 and 1444,68 cm-1. The increasing of chloro acetic acid concentration and reaction temperature decreased cation exchage capacity and changed thermal stability of polymer.
Silylated-montmorillonite as co-adsorbent of chitosan composites for methylene blue dye removal in aqueous solution Saputra, Ozi Adi; Kurnia; Pujiasih, Septi; Rizki, Vanani Nur; Nurhayati, Betty; Pramono, Edi; Purnawan, Candra
Communications in Science and Technology Vol 5 No 1 (2020)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1045.12 KB) | DOI: 10.21924/cst.5.1.2020.182

Abstract

Industrialization plays important role in the economy of developing countries, including increasing community welfare. However, the presence of poorly industries waste disposal system has negative impact to the environment. Therefore, it is necessary to overcome this problem with low-cost technology, called adsorption. In this research, silylated-montmorillonite (sMMt) has been successfully prepared as supporting material for adsorption of methylene blue by chitosan. The sMMt was characterized by FTIR, XRD, and elemental mapping techniques. The chitosan/sMMt composites were prepared through dissolution-precipitation method and produced rod-like morphology as observed by SEM. The adsorption process was carried out in a batch method by studying the pH and the adsorption contact time. The adsorption kinetic mechanism of the chitosan/sMMt nanocomposite followed pseudo-second order rather than Lagergren model indicating chemisorption predominant. The addition of silylated-montmorillonite into chitosan enhanced the methylene blue dye removal performance, which evidenced by improving Qe values by 10% compared to chitosan.
Rice Husk Ash-Derived Magnetized Silica Functionalized with TMPDT for Heavy Metal Ion Removal Hastuti, Sri; Irfani, Hasna Haifa; Nuzula, Rifania Aura; Saraswati, Teguh Endah; Masykur, Abu; Purnawan, Candra; Wibowo, Atmanto Heru; Fitriana, Dina
Molekul Vol 21 No 1 (2026)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2026.21.1.17837

Abstract

ABSTRACT. The removal of toxic heavy metal ions from water remains a critical environmental challenge. In this study, a novel magnetized mesoporous silica adsorbent functionalized with N1-(3-trimethoxysilylpropyl) diethylenetriamine (Fe₃O₄@SiO₂@meso-SiO2@TMPDT), synthesized from rice husk ash, was developed for the adsorption of Cd(II) and Pb(II) ions. The characterization of the adsorbent by FTIR, SEM-EDX, and TGA confirmed the successful synthesis of magnetized and TMPDT-functionalized silica derived from rice husk ash (Fe₃O₄@SiO₂@meso-SiO₂@TMPDT). The adsorption study consists of the determination of optimum pH, the adsorption kinetics study, and the adsorption isotherm. Batch adsorption studies showed that the optimal pH values for Cd(II) and Pb(II) adsorption were 4 and 3, respectively. The adsorption kinetics for both metal ions followed a pseudo-second-order model. Furthermore, the adsorption isotherms fitted both the Langmuir and the Freundlich models with comparable R² values. The maximum adsorption capacities (Qₘ) of Fe₃O₄@SiO₂@meso-SiO₂@TMPDT for Cd(II) and Pb(II) were 28.089 and 24.498 mg/g, respectively. These findings demonstrate that the developed adsorbents offer an effective and sustainable approach for heavy metal removal from aqueous systems. Keywords: adsorption, heavy metal ions, magnetized silica, rice husk ash, TMPDT
Optimization of Rhodamine B Decolorization by Adsorption and Photoelectrodegradation Combination System Wahyuningsih, Sayekti; Anjani, Velina; Munawaroh, Hanik; Purnawan, Candra
ALCHEMY Jurnal Penelitian Kimia Vol 14, No 2 (2018): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.14.2.16440.277-290

Abstract

A combination of adsorption and photoelectrodegradation system was performed to reduce the concentration of Rhodamine B dye in water. The adsorption was conducted using silica and alumina activated by acid and base under various predetermined pH of Rhodamine B. The photoelectrodegradation process was performed using Ti/TiO2 electrode as a cathode and Ti/TiO2-NiO as an anode. TiO2 was synthesized from titanium tetra-isopropoxide precursor (TTiP) by sol-gel method. TiO2-NiO composite was synthesized with the same precursor with the addition of Ni(NO3)2.6H2O. The result shows that the activation changes the amount of OH total in the adsorbent. The acid-activated adsorbent showed an optimum adsorption activity when Rhodamine B was in base condition caused by zwitter ionic structure. It reversely occured to base-activated adsorbent where an optimum absorption activity reached at acid condition. The application of base-activated silica in adsorption and photoelectrodegradation combination system decreased the concentration of Rhodamine B dye up to 98.79% using photoanode Ti/TiO2-NiO under pH 2 at bias potential 6 V.
Pemberdayaan Masyarakat melalui Pembuatan Detergen Cair Alami Berbasis Buah Lerak untuk Mengurangi Penggunaan Bahan Kimia Berbahaya Masykur, Abu; Fitriana, Dina; Hastuti, Sri; Wibowo, Atmanto Heru; Purnawan, Candra; Cinta, Denna Artika; Nabilla, Khairunnisa
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.109413

Abstract

Aktivasi peran masyarakat dalam menjaga lingkungan perairan penting dilakukan untuk menumbuhkan kesadaran masyarakat. Salah satu caranya adalah melalui edukasi tentang pentingnya menggunakan bahan rumah tangga yang ramah lingkungan. Kegiatan pengabdian dilakukan dengan melakukan sosialisasi kepada kelompok PKK di Perumahan Pondok Baru Permai IV, Kelurahan Ngesrep, Kecamatan Ngemplak, Kabupaten Boyolali mengenai dampak penggunaan detergen kimia yang berlebihan terhadap lingkungan. Pada sosialisasi ini, dikenalkan detergen ramah lingkungan yang berbahan dasar buah lerak yang kemudian diikuti dengan demonstrasi dan pelatihan. Keberhasilan kegiatan diukur dengan menganalisis hasil pretest dan posttest. Hasil menunjukkan adanya peningkatan pemahaman yang ditunjukkan oleh hasil posttest yang meliputi (1) anggota kelompok PKK telah mengetahui kandungan dalam detergen dan isu pencemaran lingkungan karena detergen komersial yang dievaluasi melalui peningkatan nilai rata-rata yang semula 87 pada pretest menjadi 99 pada postest. (2) Anggota kelompok PKK memahami cara membuat detergen cair berbasis lerak. Dengan demikian, kegiatan pengabdian ini memberikan implikasi mampu meningkatkan pengetahuan anggota kelompok PKK mengenai dampak penggunaan detergen konvensional, bahan alam yang potensial untuk digunakan sebagai bahan dasar detergen alami ramah lingkungan, dan keterampilan dalam membuat detergen cair dari bahan alam.
Analisis Spasial Kualitas Air Tanah Dangkal Di Lereng Gunung Wilis Kecamatan Dagangan Menggunakan Weighted Arithmetic Water Quality Index (WAWQI) Cahyono, Hadi Wiwit Hendro; Purnawan, Candra; Amanto, Bambang Sigit
ENVIRO: Journal of Tropical Environmental Research Vol 26, No 1 (2024): March
Publisher : Center for Environmental Research, LPPM, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/enviro.v26i1.93613

Abstract

Air tanah dangkal sangat mudah mengalami kontaminasi yang disebabkan oleh pencemaran yang terjadi di permukaan tanah. Tercemarnya air tanah dangkal umumnya melalui proses infiltrasi dan perkolasi. Kecamatan Dagangan merupakan salah satu kecamatan yang ada di Kabupaten Madiun, dimana wilayahnya terletak di lereng Gunung Wilis sehingga merupakan kawasan resapan air tanah yang sangat baik. Pengukuran kualitas air menggunakan metode Water Quality Index (WQI). Terdapat 30 sampel yang digunakan untuk mempresentasikan kualitas air di Kabupaten Dagangan. Kualitas air tanah dangkal di Kecamatan Dagangan berkisar antara 1,42 hingga 88,97. Menurut klasifikasi indeks WQI, kualitas air di daerah ini termasuk dalam kategori Sangat Baik (7 titik), Baik (19 titik), Buruk (3 titik), Sangat Buruk (1 titik), dan tidak ada yang masuk dalam kategori Tidak Layak untuk Air Minum (0 titik). Bagian utara Kecamatan Dagangan, dengan topografi datar, merupakan pusat perekonomian dan aktivitas pertanian, sehingga cenderung memiliki sumber kontaminan lebih tinggi. Sebaliknya, bagian selatan yang lebih tinggi didominasi oleh lahan perhutani, perkebunan, dan hutan, sehingga jumlah kontaminan yang masuk jauh lebih sedikit.
Sumbangan Indeks Kualitas Udara Wilayah sebagai Bagian Pencapaian Sustainable Development Goals (Studi Kasus: Kabupaten Magetan) Arini, Dien Rusda; Purnawan, Candra; Rahayu, Endang Siti; Utomowati, Rahning; Purnomo, Nugroho Andi
ENVIRO: Journal of Tropical Environmental Research Vol 24, No 2 (2022): September
Publisher : Center for Environmental Research, LPPM, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/enviro.v24i2.70452

Abstract

Indeks Kualitas Udara yang selanjutnya disingkat IKU adalah ukuran yang menggambarkan kualitas udara yang merupakan nilai komposit dari parameter kualitas udara yang ditetapkan peraturan perundang-undangan. Indeks Kualitas Udara (IKU) Kabupaten Magetan Tahun 2021 sebesar 85,28 atau kategori “baik” yang berarti bahwa indeks kualitas udara di Kabupaten Magetan masih di bawah target nilai IKU Nasional Tahun 2021 yakni sebesar 87,36 dan masih di bawah target nilai IKU Kabupaten Magetan Tahun 2021 yaitu sebesar 88,42
Co-Authors Abu Masykur Anjani, Velina Arini, Dien Rusda Asnani Ratna Ambarrukmi, Asnani Ratna Atmanto Heru Wibowo Bambang Sigit Amanto, Bambang Sigit Cahyono, Hadi Wiwit Hendro Cinta, Denna Artika Edi Pramono Edi Pramono Eko Sugiharto Endang Siti Rahayu Fitriana, Dina Indriana Kartini Irfani, Hasna Haifa Jati Wulansari, Jati Kurnia Munawaroh, Hanik Nabilla, Khairunnisa Nurhayati, Betty Nurul Hidayat Apriliata Nuzula, Rifania Aura Ozi Adi Saputra, Ozi Adi Pandu Satrio Asiska Prabowo, Pandu Satrio Pujiasih, Septi Purnomo, Nugroho Andi Purwanto Purwanto Rizki, Vanani Nur Sayekti Wahyuningsih Shofiatul Afidah, Shofiatul Sotya Rawiningtyas, Sotya Sri Hastuti Teguh Endah Saraswati Thita Haryati, Thita Tri Martini Triana Kusumaningtyas, Triana Utomowati, Rahning Yuniawan Hidayat Zidny Z.S.R.A. Zidny, Zidny Z.S.R.A.