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Journal : Alchemy : Journal of Chemistry

Sintesis Pigmen Geothit (α-FeOOH) dari Limbah Industri Kerajinan Besi dengan Metode Presipitasi Nisa, Choirun; Aini, Nur; Khoiroh, Lilik Miftahul
ALCHEMY Vol 7, No 2 (2019): ALCHEMY: Journal of Chemistry
Publisher : Department of Chemistry, Faculty of Science and Technology UIN Maulana Malik Ibrahim Malan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (318.815 KB) | DOI: 10.18860/al.v7i2.4928

Abstract

Iron handicraft is one of industries that process iron ore into handicraft products and produce lathe waste. Iron lathe contains 96.08% iron metal which is potential source as a precursor for synthesis of goethite pigment. The method used for synthesis was precipitation using NaHCO3 as precipitator agent. Synthesis was conducted at 70°C with variations of stirring speed such as 550, 650, 750 and 850 rpm. The products were characterized by color reader, ultraviolet-visible (UV-Vis) spectroscopy, XRD and SEM-EDX. The data from color reader showed that the highest yellowness degree and lightness obtained at a stirring speed 550 rpm were 24.1 and 42.1, respectively. UV-Vis data showed that the maximum wavelength of goethite pigment was 600-624 nm. Based on XRD data, synthesized pigment was in goethite phase (α-FeOOH) for all samples with crystallite size 63.24 nm and the highest crystallinity was achieved at 550 rpm. SEM-EDX data showed that morphology pigment (α-FeOOH) was not uniform, there were impurities such as Na and C. Keywords: Lathe waste, precipitation, goethite, pigment  Industri kerajinan besi merupakan salah satu industri yang mengolah bijih besi menjadi produk kerajinan dan menghasilkan limbah bubut besi. Limbah bubut besi mengandung unsur besi sebesar 96,08% yang berpotensi sebagai bahan baku (prekursor) untuk sintesis pigmen geothit. Metode yang digunakan adalah metode presipitasi dengan agen pengendap NaHCO3. Sintesis dilakukan pada suhu 70°C dengan variasi kecepatan pengadukan 550, 650, 750 dan 850 rpm. Produk hasil sintesis dikarakterisasi dengan color reader, spektroskopi ultraviolet-tampak (UV-Vis), XRD, dan SEM-EDX. Data color reader menunjukkan bahwa derajat kekuningan dan derajat kecerahan tertinggi didapatkan pada kecepatan pengadukan 550 rpm yaitu berturut-turut 24,1 dan 42,1. Data UV-Vis menunjukkan panjang gelombang maksimum pigmen geothit hasil sintesis adalah 600-624 nm. Hasil karakterisasi XRD menunjukkan bahwa pigmen hasil sintesis pada semua kecepatan pengadukan berfasa geothit (α-FeOOH) dengan derajat kristalinitas tertinggi pada kecepatan pengadukan 550 rpm dengan ukuran kristal 63,24 nm. Hasil SEM-EDX pada kecepatan 550 rpm menunjukkan bahwa morfologi pigmen (α-FeOOH) hasil sintesis tidak seragam dan ditemukan adanya pengotor berupa unsur Na dan C. Kata kunci: Limbah bubut besi, presipitasi, geothit, pigmen
Co-Authors Adawiyah, Robiyatul Aditya, Nanda Oktarina Afifah, Marwa Faridatul Agustian, Riu Aisy, Umniyah Rihadatul Aji Santosa Almufariz, M.Deby Amrullah, Muhamad Tohir Anak Agung Putu Putra Anam Sutopo Anatri Desstya Andhika Giri Persada, Andhika Giri Anggi Kurniawati, Lucky Annisa, Iut Diyah Aprilia, Peni Ar-Rif’an, Hanif Ariyatmi, Siti Zuhriyah Arum, Dewi Puspa Athoilah, Husnu Awalla, Afra Ilmi Taqrir Azizah, Alfiana Bahtiar, Yuyun Cahyoko, Fajar Dwi Cahyono, Dedi Dwi Darusasi, Restutita Darusasi Djumilah Zain Eka Danik Prahastiwi Endah Rahmawati Fadillah, Retno Fajar, Andika Putra Fathul Lubabin Nuqul Fikriya, Kinanthi Nur Firdaus, Ahmad Rizki Gavriyanto, Vito Gustia, Sela Habib, Rahmadina Amalia Hapsari, Rizqa Qodriannisa Harun Joko Prayitno Hasan Bashori Hayati, Umi Nur Hendra Sukmana Hidajat, Sjarief Honest Ummi Kaltsum Ilhami, Ilhami Karimah, Nila Khoirurrosyid, Muhammad Kurniawati, Lucky Anggi Kusuma Wijayanto, Kusuma Kusuma, Pratama Surya Bagus Laily Fitriani Lilik Miftahul Khoiroh Lollita Fristayana Made Sri Satyawati Minamas, Putri Moh. Zawawi, Moh. Muballigh, Ahmad Muhamad Taufik Hidayat Nasution, Annio Indah Lestari Niken Larasati Nikmah, Annisatul Nor Rochmatul Wachidah Noviana, Umi Hanik Nugraha, Irwan Ardiansyah Nur Fikriya, Kinanthi Nurhasanah, Hasna nurkinan, nurkinan Nurmaulid , Mitha Safira Nurpratama, Yovan Pe, Cecilia Debora Pininta Veronika Silalahi Qur'ani, Auliyah Nazal Rahmatullah, Muhammad Yasin Rahmaturrizqi Rahmaturrizqi Rahmaturrizqi, Rahmaturrizqi Renggani, Puspa Riefky, Muhammad Risma Firda Diana, Risma Firda Rodiyah, Diyah Rohmatin, Kartika Nur Khozaainah Rosidah, Istifaur Roudhotul Jannah Royta, Assa Sapruddin, Aisyara Zalzabila Saputri, Ayunda Nadea Septuri Siti Hariati Hastuti Siti Jamilah Sofiana, Isnaeni Subakti, Amin Sudrajah Warajati Kisnawaty Sulyani, Agnesia Candra Tumiyem, Tumiyem Umam, Muhammad Misbahqul Utamidewi, Wahyu Wati, Medya Silvia Widya P, Nurfitria Wijaya, Riwanda Luke Wiyli Yustanti Wulandari, Safitri Yulia Maftuhah Hidayati Yusmansyah*, Erfizal Fikri