Walisongo Journal of Chemistry
Walisongo journal of chemistry is a peer reviewed and open access journal published by Chemistry Department, faculty of Science and Technology, UIN Walisongo Semarang. This journal covering all areas of chemistry including inorganic, organic, physic, analytic, biochemistry, and environmental chemistry. Walisongo Journal of Chemistry publish two issues annually (July and October). Article which accepted in this journal was written by Bahasa and English.
Articles
203 Documents
<![CDATA[Dekolorisasi Senyawa Azo Limbah Remazol Golden Yellow oleh Bioadsorben Eceng Gondok (Eichhornia Crassipes) ]]>
<![CDATA[Ika Nur Fitriani]]>;
<![CDATA[Anggi Ristiyana Puspitasari]]>;
<![CDATA[Rizki Nor Amelia]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 2, No 2 (2019): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v2i2.6023
<![CDATA[Telah dilakukan penelitian tentang adsorbsi senyawa azo Remazol Golden Yellow dari limbah cair zat warna sintetis menggunakan adsorben dari eceng gondok (Eichhornia crassipes). Penelitian ini bertujuan untuk mengetahui kondisi optimal eceng gondok (Eichhornia crassipes) sebagai bioadsorben limbah zat warna Remazol Golden Yellow dan mengetahui kadar ppm Remazol Golden Yellow maksimum dalam limbah zat warna sintetis yang dapat diserap oleh bioadsorben eceng gondok (Eichhornia crassipes). Subyek penelitian adalah eceng gondok yang teraktivasi NaOH 2% dengan waktu perendaman 24 jam. Obyek penelitian adalah efisiensi adsorpsi eceng gondok (Eichhornia crassipes) terhadap zat warna sintetis-reaktif Remazol Golden Yellow. Variabel bebas yang dipakai adalah variasi massa. Daya adsorbsi ditentukan dengan dengan membandingkan konsentrasi Remazol Golden Yellow sebelum dan setelah adsorbsi. Hasil penelitian menunjukkan bahwa semakin besar massa bioadsorben, efisiensi adsorbsi juga akan semakin besar dan adsorbsi optimum variasi massa Remazol Golden Yellow diperoleh pada massa adsorben 2,5 gram/100 mL dengan efisiensi adsorbsi 74,767%]]>
<![CDATA[Effect of H2O2 Addition on the Photocatalyst Properties of Ag3PO4 for Methylene Blue Photodegradation ]]>
<![CDATA[Febiyanto Febiyanto]]>;
<![CDATA[Muhammad Sofi Khoerul Amal]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 4, No 2 (2021): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v4i2.7996
<![CDATA[In this work, a facile enhanced property of Ag3PO4 photocatalyst using H2O2 for methylene blue photodegradation has been conducted. Ag3PO4 photocatalyst was synthesized using the co-precipitation method. Then, the photocatalytic activity and stability of Ag3PO4 were tested in the methylene blue degradation under the addition of an H2O2 30% solution. According to the results, the prolonged photocatalysis reaction led to a decrease in the catalysis ability of the Ag3PO4 photocatalyst. Meanwhile, the addition of 5 mL of H2O2 (AH-10% sample) tends to enhance the stability of Ag3PO4 photocatalyst with the dye removal percentage and recycling test were up to 90.3% and three recycle runs, respectively. The low stability of Ag3PO4 might be due to the catalyst photo-corrosion through Ag+ reduction. This research suggests that H2O2 is beneficial to inhibit the photo-corrosion of Ag3PO4 photocatalyst, even though released Ag ions that were caused by the excess addition of H2O2 oxidizing agent should be considered.]]>
<![CDATA[Pembuatan Cuka Alami Buah Salak dan Pisang Kepok Beserta Kulitnya Teknik Fermentasi ]]>
<![CDATA[Dwi Ratna Febriani]]>;
<![CDATA[Zidni Azizati]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 1, No 2 (2018): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v2i2.3105
<![CDATA[Cuka adalah suatu zat yang dibuat dari berbagai bahan yang bergula atau berpati melalui fermentasi alkohol yang diikuti oleh fermentasi asetat. Cuka yang beredar di masyarakat biasanya terbuat dari bahan-bahan kimia yang berbahaya bagi tubuh, secara industri dengan menggunakan metode sintesis kimia murni. Untuk itu perlu dibuat inovasi alami dalam pembuatan cuka buah yaitu salak dan pisang kepok beserta kulitnya. Buah salak dan pisang kepok merupakan buah yang banyak terdapat di berbagai wilayah Indonesia yang mengandung kadar karbohidrat yang tinggi sehinggga dapat dimanfaatkan sebagai bahan baku pembuatan cuka. Tujuan dari penelitian ini adalah untuk mengetahui efektifitas pembuatan cuka alami buah salak dan pisang kepok beserta kulitnya dengan teknik fermentasi. Hasil penelitian menunjukan bahwa kadar asam cuka sebesar 0,042 %, memiliki aroma yang kurang sedap,larutan berwarna putih dan nilai pH 4,5 sehingga belum memenuhi kadar cuka yang dipasarkan dan dikonsumsi masyarakat yaitu minimal 4 %(4 g asam asetat per 100 ml)]]>
<![CDATA[Studi Perbandingan Adsorpsi-Desorpsi Anion Nitrat dan Sulfat pada Bentonit Termodifikasi ]]>
<![CDATA[Syarifah Rabiatul Adawiah]]>;
<![CDATA[Sutarno Sutarno]]>;
<![CDATA[Arfiani Nur]]>;
<![CDATA[Rahmiani Gani]]>;
<![CDATA[Titik Andriani]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 4, No 1 (2021): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v4i1.7585
<![CDATA[Telah dilakukan studi perbandingan adsorpsi-desorpsi nitrat dan sulfat pada bentonit termodifikasi. Adsorpsi dilakukan dengan mengocok adsorben dalam larutan adsorbat pada kondisi pH, waktu kontak dan konsentrasi optimum. Selanjutnya dilakukan studi desorpsi pada air dan asam sitrat yang menggunakan adsorben yang telah mengadsorpsi nitrat dan sulfat. Studi menunjukkan bahwa kapasitas adsorpsi dipengaruhi oleh muatan dan ukuran anion. Semakin kecil muatan dan ukuran anion, semakin besar kapasitas adsorpsinya. Hasil penelitian menunjukkan kapasitas adsorpsi: nitrat (0,032 mmol g-1) sulfat (0,020 mmol g-1). Pada studi desorpsi menunjukkan bahwa persentase pelepasan juga dipengaruhi oleh muatan dan ukuran anion, semakin besar muatan dan ukuran anion maka semakin mudah proses desorpsi. Persentase desorpsi dalam air pada waktu kesetimbangan adalah: sulfat (71,33%) nitrat (50,71%) dan dalam asam sitrat adalah: sulfat (95,76%) nitrat (59,05%). Hasil penelitian menunjukkan bahwa kelarutan anion dalam asam sitrat lebih besar dari pada air, hal ini merupakan persyaratan untuk aplikasi pupuk lepas lambat (SRF).]]>
<![CDATA[Pengolahan Air Limbah Menjadi Air Minum Dengan Menghilangkan Amonium Dan Bakteri E-Coli Melalui Membran Nanofiltrasi ]]>
<![CDATA[Malikhatul Hidayah]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 1, No 1 (2018): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v2i1.2668
<![CDATA[Industrial waste water area that flows in the River Flood Canal Semarang can affect the environment if not done processing. Membrane is one alternative water treatment technologies with the principle of filtration. The presence of fouling is a problem encountered in the use of the membrane. In this study will be made of non-fouling nanofiltration membranes made from cellulose acetate. Manufacture of cellulose acetate membrane is accomplished by phase inversion method, which is changing the shape of the polymer solid phase into the liquid phase rich in solvent into solids (membrane) which is rich in polymer. Therefore, the aim of this study was to create a non-fouling nanofiltration membrane using cellulose acetate polymer as well as assess the effect of PEG additives and pre-treatment with UV light to the surface of the structure and performance of cellulose acetate membranes for produced water treatment. Research using cellulose acetate membranes for wastewater treatment is done by varying the type of PEG 1500 and 4000, variations of PEG of 1, 3 and 5% by weight and a UV irradiation for 10, 20 and 30 seconds. The research followed by testing the performance of the membrane in wastewater treatment using a dead-end filtration with the parameters of flux and rejection. Characterization of the membrane was analyzed with SEM and FTIR. Analysis of the results was conducted to determine the levels of turbidity, TDS, COD, Ca2+, S2- and oil in waste water before and after passing through the membrane.]]>
<![CDATA[Adsorpsi Logam Ni (II) pada Adsorben ‘Ramah Lingkungan’ Asam Humat Kotoran Kuda ]]>
<![CDATA[Rohmatullaili Rohmatullaili]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 3, No 2 (2020): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v3i2.6104
<![CDATA[Ekstraksi asam humat dari kotoran kuda telah dilakukan dengan prosedur standar International Humic Substance Society (IHSS) di bawah atmosfer udara. Penelitian ini dilakukan untuk memanfaatkan asam humat kotoran kuda (AHKK) sebagai adsorben limbah logam Ni (II). Dugaan awal adanya Asam Humat dalam kotoran kuda dikarenakan kandungan lignin di dalamnya. Persentase ekstraksi asam humat murni dari kotoran kuda mencapai 0,4%. Interaksi AHKK dengan logam Ni(II) dilakukan dalam larutan. Aspek adsorpsi yang dipelajari meliputi pengaruh pH, waktu kontak, kinetika, kapasitas adsorpsi, dan model isoterm adsorpsi Asam Humat Kotoran Kuda terhadap logam Ni (II). Adsorpsi logam Ni (II) pada AHKK mengikuti model isoterm adsorpsi Langmuir. Hasil penelitian menunjukkan bahwa Asam Humat dapat diekstraksi dari kotoran kuda, dan dapat mengadsorpsi logam Ni (II) pada situs aktifnya. Adsorpsi yang terjadi hanya pada lapisan tunggal, yang berarti situs aktif pada permukaan adsorben memiliki kemampuan adsorpsi yang sama dan terdistribusi secara merata.]]>
<![CDATA[The Study of Pineapple Peel (Ananas comosus L.) Waste Based-Electrolyte Medium: A Simple Experiment Design for the Students ]]>
<![CDATA[Irvan Maulana Firdaus]]>;
<![CDATA[Rosiana Dewi Silvia]]>;
<![CDATA[Ahmad Faqih Amin]]>;
<![CDATA[Rajwa Vourza Tsaqifa]]>;
<![CDATA[Ira Purnama]]>;
<![CDATA[Febiyanto Febiyanto]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 2, No 2 (2019): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v2i2.6029
<![CDATA[To promote the student curiosity and understanding in the electrolyte medium was carried out using home-made Volta cell. The electrode materials were iron and carbon for anode (-) and cathode (+), respectively. The experiment was designed by two models that were single-chamber (SC) and three series-packed chambers (3-SCs), respectively. Electrolyte properties could be investigated in pineapple peel (Ananas comosus L.)-based electrolyte medium during the operating time of 8 hours, respectively. The measured-voltage of 2.63 and 2.60 of the 3-SCs system could turn on the LED lamp. However, in this study, the decrease of voltage and current were due to the oxidation process of the pineapple peel-based medium under air, room temperature, and normal pressure during the long-operating time of the experiment. Finally, this research expected to provide additional valuable experience and knowledge as same as to facilitate in information delivering to the students in understanding the electrolyte medium from the waste or natural sources.]]>
<![CDATA[Isolation of Cellulose-Degrading Bacteria from Luwu Timur in Oil Palm Empty Fruits Bunch ]]>
<![CDATA[Amalyah Febryanti]]>;
<![CDATA[Maswati Baharuddin]]>;
<![CDATA[Irma Rahayu]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 4, No 2 (2021): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v4i2.9173
<![CDATA[The oil palm empty fruit bunch (OPEFB) is one of the solid wastes produced by industrial factories. These bunches are the habitat of cellulolytic bacteria. This study aims to identify the morphology and determine the potential microorganisms in degrading oil palm empty fruit bunches waste. The methods used in this study were isolation and observation of bacterial morphology, bacterial screening, degradation test of empty oil palm fruit bunches waste, and enzyme activity test with DNS method using UV-Vis spectrophotometer at a wavelength of 530 nm. A collection of 14 isolates were obtained from the isolation process. We obtained 14 isolates from the sample, the largest clear zone was shown by isolate S10. The isolate also exhibited the highest cellulose-degrading activity after 7 days incubation period with a degrading percentage of 13.27%. After incubation for 2 days, the morphological characteristics of the bacteria produced have circular and medium-sized colonies, yellow, colonies wave edges and flat colonies, elevation convex and smooth surface. The resulting enzyme activity was 0.1308 U/mL. Therefore, isolate S10 was suspected to have the potential to degrade plastic.]]>
<![CDATA[Integrasi Nilai-nilai Keislaman pada Reaksi Redoks dan Elektrokimia terhadap Rahasia Kekuatan Benteng Besi Zulkarnain ]]>
<![CDATA[Desy Kurniasari]]>;
<![CDATA[Noor Indah Simponi]]>;
<![CDATA[Arghob Khofya Haqiqi]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 2, No 1 (2019): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v3i1.3875
<![CDATA[Besi merupakan salah satu logam yang paling banyak dijumpai di dalam kerak bumi. Dengan besi manusia dapat membina kekuatan bangsa dan negaranya, karena dari besi dibuat segala alat perlengkapan pertahanan dan keamanan negeri. Salahsatu penerapannya adalah benteng besipada masa Iskandar Zulkarnain. Pendirian benteng besi Iskandar Zulkarnain terdapat dalam al-Qur’an surah al-Kahfi ayat 96-98. Benteng besi Iskandar Zulkarnain merupakan benteng yang terbuat dari peleburan besi dan campuran tembaga. Di dalamnya terdapat reaksi-reaksi kimia yaitu reaksi redoks dan elektrokimia.Penelitian ini bertujuanuntuk mendeskripsikan konsep dan gambaran umum integrasi reaksi kimia terhadap kekuatan dan kisah pendirian benteng besi Iskandar Zulkarnain dalam al-Qur’an dan untuk menjelaskan reaksi redoks dan elektrokimia pada benteng besi Iskandar Zulkarnain. Metode yang digunakan adalah metode penelitiankepustakaan yang berkaitan dengan reaksi yang terdapat pada benteng besi Iskandar Zulkarnain dan nilai-nilai keislaman dalam ayat-ayat al-Qur’an. Hasil penelitian adalah penyampaian pada pendirian benteng besi Iskandar Zulkarnain yang memuat nilai-nilai keislaman serta reaksi redoks dan elektrokimia. Berdasarkan hasil penelitian dapat disimpulkan bahwa pendirian benteng besi tercantum dalam surat al-Kahfi ayat 96-98 serta di dalamnya terdapat reaksi redoks dan elektrokimia karena besi bersifat mudah mengalami korosi.]]>
<![CDATA[Study of Cadmium Bioaccumulation in Perna viridis through Food Pathway and Its Decontamination ]]>
<![CDATA[Octavin Exaudina]]>;
<![CDATA[Wahyu Retno Prihatiningsih]]>;
<![CDATA[Heny Suseno]]>;
<![CDATA[Budiawan Budiawan]]>
<![CDATA[ Walisongo Journal of Chemistry Vol 4, No 1 (2021): Walisongo Journal of Chemistry ]]>
Publisher : <![CDATA[Department of Chemistry Faculty of Science and Technology Walisongo ]]>
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DOI: 10.21580/wjc.v4i1.7559
<![CDATA[Seafood can be contaminated by heavy metals that contained in seawater and the source of food that marine biotas eats. Cadmium is one of the contaminants found in the marine environment. Bioaccumulation studies via foood pathway were complement previous studies through the seawater pathway. This study also made an effort to biologically decontaminate cadmium using acetic acid and citric acid. The experimental results showed the total bioaccumulation ability of Cd by Perna viridis was 74.01. Cd decontamination which accumulates in the Perna viridis decreases the level up to 21% ]]>
