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Journal : Reaktor

Transformation of Calcium Carbonate Polymorph From Various Type of Shells by Carbonation Methods Srie Muljani; Erwan Adi Saputra; Ketut Sumada
Reaktor Volume 21 No. 1 March 2021
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1446.366 KB) | DOI: 10.14710/reaktor.21.1.27-34

Abstract

The utilization of shells can reduce the accumulation of shell wastes and increase the value of shells to achieve ecological and economic incentives. This study examines the transformation of calcium carbonate polymorph from several types of shells to understand the causes of their characteristics in order to suitable for their use. The types of shells used in this experiment are selected based on consumable and their habitats such as snail shells, crab shells, eggshells, batik mussels shells, and golden conch shells. The prepared shells calcinate at 900 °C, the reaction with hydrochloric acid, and carbonation by flowing CO2 into a stirred reactor to produce precipitated CaCO3. The characteristics of polymorph CaCO3  in the sintering temperature of 30, 50, and 70 ℃ were identified by XRD, FTIR, and SEM morphological. The result is that the polymorphs formed from each shell are different in shape, size, and crystallinity. At the temperature of 70 ℃, the rhombohedral calcite was obtained from snail shells, the cubic calcite was obtained from batik mussel shell, while rhombohedral calcite multilayers obtained (100%) from golden conch shells. The aragonite was obtained from batik mussel shells at 30 and 70 ℃. The pure vaterite (100%) was obtained from snail shells and crab shells at 50 ℃. The characteristic of polymorph formed might be useful as information for more suitable applications, especially as nano-bio materials, optical, or filler
Sedimentation Process of TiO2 Nanoparticles in Aqueous Solution Ariyanti, Dessy; Purbasari, Aprilina; Lesdantina, Dina; Saputro, Erwan Adi; Gao, Wei
Reaktor Volume 22 No.2 August 2022
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.22.2.70-76

Abstract

TiO2 nanoparticles, a semiconductor photocatalyst is widely used in various applications especially for water treatment. The common problems for the application are separating the nanoparticles from the water body and recovering it to be reused. This research was conducted to investigate the aggregation and sedimentation properties of TiO2 nanoparticles via chemical addition. The experiment was carried out for 5 hours by varying the pH, ionic strength, and the addition of organic matter such as rhodamine B, methylene orange, and humic acid. The results indicate that pH and ionic strength greatly affect the TiO2 sedimentation process. Sedimentation can be formed properly when the solution is at pH 1 and 14, this happens because pH is close to the isoelectric point. Meanwhile, ionic strength with a concentration of 0.1 M gave the most optimal results in TiO2 sedimentation. In the presence of ionic strength with the appropriate concentration, the thickness of the electrical double layer particles can be reduced so the attractive force increases and sedimentation occur. Meanwhile, in the presence of organic matter, rhodamine B, methylene orange, and humic acid did not significantly affect the formation of TiO2 sedimentation.Keywords: titanium dioxide, sedimentation, ionic strength, isoelectric point, water treatment
Co-Authors A.R Yelvia Sunarti A.R Yelvia Sunarti Abdul Aziz Achmad Baizuny Achmad Chumaidi, Achmad Achmad Rizaldi Achmad Rizaldi Afida Kartika Sari Ahmad Khairul Faizin Ahmad Rizaldi Ahmad Rizaldi Ahmad Thobroni Akbar Aiman A. Bobsaid Aiman Anas Bobsaid Ainurrohmah, Syafika Al Furkhon, Arif Alfarizi, M. Vurqon Anastasia, Bella Wanda Andre Yusuf Trisna Putra Andyas Mukti Pradanarka Anugerah Dany Priyanto Anugerah Dany Priyanto Apridio Faiz An Nabil Aprilina Purbasari AR Yelvia Sunarti AR Yelvia Sunarti AR Yelvia Sunarti Arbiter Khalida Bramanta Ardika Nurmawati Ardika Nurmawati Ardika Nurmawati Ardika Nurmawati Ardika Nurmawati Ardika Nurmawati, Ardika Arif Al Furkhom Arifin, Ahmad Zaenal Arifin, Ahmad Zaenal Arista Pratama Arista Pratama Arya Mustofa Aryogani, Fajar Auliya Ichda Bandung Arry Sanjoyo Bella Wanda Anastasia Bellani Yunfa Winata Billah, Mu’tasim Billah, Mu’tasim Bintang Bayu Cezarridfalah Bobsaid, Aiman Anas Chaerani, Novika Cahya Chamida, Rida Defri, Ifwarisan Dendy Raditya Dendy Wahyu Raditya Dessy Ariyanti Dessy Ariyanti Devita Salsa Gunawan Dewi Novita Rachmayani Dewi, Dwi Kirana Ika Candra Dhining Ayu Djatmiko, Faiz Putra Dwi Sukma Donoriyanto Dwi Sukma Donoriyanto Efendi, Elene Afrisia Effendi, Anggi Aulia Putri Elene Afrisia Efendi Elene Afrisia Efendi Elsa Rosyidah Elsa Sabrina Agustia Putri Endang Pudji Widjajati Eristya Maya Safitri Erliyanti, Nove Kartika Erza Anggara Verbiawan Fadhilah, Rahadyan Itsar Fahimatul Ulum Faiz Putra Djatmiko Farafi, Nafisah Faris Harditya Purnama Fathoni, Nur Alif Iqbal Fawwaz Rafi D Febriansyah, Harris Fransisca Asteria Nandra Febiola Frizqa Ayu Bariqlana Gelar Panji Gemilar Hafid Syaifullah Handy, Febry Widiatniko Heru Wuryanto, Didiek Iffad Rakhmanhuda Ifwarisan Defri Ifwarisan Defri Ika Favia Anggraeni Ika Favia Anggraeni Ika Nawang Puspitawati Imaya M. Nurjannah Imaya M. Nurjannah Intania Widyantari Kirana Iqbal Mahendra Iqbal Mahendra Irawan, Rayesha Yuda Irsya Emilia Putri Islami, Mega Cattleya P.A Islamiyah, Syuaibatul Jalil, Mohd Jumain Juwana, Krishna Rahmad Ketut Sumada Caecillia Pujiastuti Kurniati, Ely Kurniawan, Moh Nawawi Kusuma, Meidina R. Laili Mabrur Rohma Laksminingsih, Arieanthi Latif, Ahmad Sofwan Lesdantina, Dina Lia F. Ramadhani Limbong, Fajar H. Luckyana Aini Luckyana Aini Luky Natasha Luluk Edahwati Lutfiananda, Delfian M. Rifki Ramjani M. Vurqon Alfarizi Mardiansyah, Yuda Eka Masykuri Latief Masykuri Latief Meidina R. Kusuma Meisy C. Hutabarat Meisy Cruisyta Hutabarat Melita, Lusia Nada Moch Akbar Munin Putra Moch Tutuk Safirin Mochamad Dhani Dharmawan Moh Nur Fuadzi Moh. Nofianto Mohammad Arriza Novan Tahta Aunillah Mr. Sutiyono Mu'is, Yusup Fatkhul Mu'tasim Billah Muchammad, Raka Selaksa Charisma Muhammad Abdus Salam Jawwad Muhammad Faisal Fadhil Muhammad Faishal Ma’arif Muhammad Ikhsan Muhammad Naufal Zhorif Munirotul Aina Bin Nur Hidayah Murti, Restu Hikmah Ayu Mutasim Billah Mutasim Billah Mutiara Mei Susanti Nadzifah, Novia Nandini, Atika Nazua, Hanani Ndaru Adyono Nerissa Arviana Nerissa Arviana Ni Ketut Sari Noor Ariefandie Febrianto Nopiyanti, Wiwin Novan Sandhi Pradana Noviani, Siti Alya Novita Indahyani Nugraha, Reva Edra Nugroho, Sutra Amelia Nur Alif Iqbal Fathoni Nur Annisa NUR FITRI MIDAYOGA, DIAH Nurhediana, Silvana Dwi Nurjaya, Luh Asri Ningsih Widhi Nurmawati, Adika Panjaitan, Renova Pinandita, Indrawan Praja, Delphy Y. A. Pratama, Arista Pratiwi, Annisa Kurnia Priambodo, Melandy Dwi Puspitasari, Indah Maharani Puspitawati, Ika N. Putra, Andre Yusuf Trisna Putri Ambarwati Putri Anggraini, Putri Putri, Nabilah Pratama Rachmad Ramadhan Yogaswara Rachmad Ramadhan Yogaswara Rachmad Ramadhan Yogaswara Rachmad Ramadhan Yogaswara Rachmad Ramadhan Yogaswara Rachmad Yogaswara Radissa Dzaky Issafira Ramadhani, Lia F. Ramjani, M. Rifki Rasendriya Putra Ratna Yulistiani Renova Panjaitan Renova Panjaitan Retno Widyastuti Retno Widyastuti, Retno Reva Edra Nugraha Rina Yulianti Rohmah, Aisyah Alifatul Zahidah Romalawati, Meiswita Rus Indiyanto Safirin, Moch Tutuk Sani Sani Sanjoyo, Bandung Arry Santi, Sintha Soraya Saputra, Ananda Dimas Mukti Bayu Sekar Ayu Larasati Sholeha, Novia Amalia Silvana Dwi Nurherdiana Sri Winarti SRIE MULJANI Sunarti, A.R Yelvia Syafitri, Miranda Dwi Syah Ruddin Nur Hidayat Tahan Aprijal Simamora Tahan Aprijal Simamora Tahan Simamora Tikat Deri Agratiyan Titi Susilowati Titi Susilowati Tria Puspa Sari Trianna, Nurul Widji Utama, Hilmy Ghani Wahyu Dwi Lestari Wei Gao Wening Bekti Kusumaningrum Widiya Ningrum Widjajati, Endang Pudji Widya Amelia Krisnanda Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Winursito, Yekti Condro Wira Yudha Nuswantoro Wiwin Nopiyanti Yekti Condro Winursito Yekti Condro Winursito Yogaswara, Rachmad Ramadhan Yogaswara, Rachmad Ramadhan Yoghaswara, Rachmad Ramadhan Yuniar Dwi Lestari Zuhriah Mumtazah