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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Kependidikan: Penelitian Inovasi Pembelajaran JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian Saintek Jurnal Pendidikan Kimia Indonesia Jurnal Sains Dasar Journal of Education and Learning (EduLearn) Jurnal Inovasi Pendidikan Kimia JPS Unimus Jurnal Inovasi Pendidikan IPA Scientiae Educatia: Jurnal Pendidikan Sains Jurnal Zarah Indonesian Journal of Chemical Science Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA TANJAK: Journal of Education and Teaching Indonesian Journal of Chemistry and Environment Jurnal Elemen Kimia Technological Pedagogical Content Knowledge Jurnal Riset Pembelajaran Kimia Jurnal Kemitraan, Kewirausahaan dan Pengabdian Masyarakat
Erfan Priyambodo
Universitas Negeri Yogyakarta
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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Journal : Jurnal Penelitian Saintek

 1 
THE EFFECT OF pH ON THE ADSORPTION OF MICRONUTRIENT CATIONS OF Ca 2+ AND K + BY SILICA FROM LAPINDO MUD Jaslin Ikhsan; Siti Sulastri; Erfan Priyambodo
Jurnal Penelitian Saintek Vol 20, No 1: April 2015
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1406.394 KB) | DOI: 10.21831/jps.v20i1.5603

Abstract

The aim of this research was to determine the effect of pH on the adsorption of micronu- trients of Ca 2+  and K . by silica from lapindo mud. Data were collected by the adsorption experiments, on which 3 grams of silica separated from Lapindo mudwere dissolved in 300 mL of 0.0001 or 0.001 M Ca + 2+ or K ., and stirred for 2 hours. The pH of suspension was varied and left for equilibrate for 2 hours, and a sample was taken and measured for free concentration of K + + .cation  using Flame Atomic Emission Spectroscopy and of Ca  using Atomic Absorption Spectroscopy (AAS). The pH ranges were from 3 to 10. Temperature o  30 C and contact time of 2 hours were maintained. The research showed that both cations were adsorbed in sigmoid curve, increased with increasing pH values. In entire ranges of observed pH, the percentage of cations adsorbed by silica was not different signifi cantly. The adsorbent of silica formed silanol (SiOH) in water. The –OH groups of silica were protonated forming SiOH o at lower pH and deprotonated forming SiO¯ at higher pH. Wether Ca 2+  or K + 2 + . cations were bound to silica surfacesvia cation exchange reactions, on which Ca2+ or K + . exchanged H of SiOH using one charge of the cations, forming [SiO(CaO)] for Ca 2+ , and [SiO-K] for K
Co-Authors Adlina Amalia Adlina Amalia Anggiyani R.E. Nugraheni Ani Apriani Antuni Wiyarsi Arifiana, Indri Arshiva Tuniza Nur Septiani Asri Widowati Azza Aqila Mumtaz Darojati, Firda Putri Das Salirawati Das Salirawati Dewi Yuliana Dyah Mustika Braniwati Elfina Salsabila Febriyanti, Arni Fitri Wahyuning Hermas Randhanugraha Indah Familiasari Jaslin Ikhsan Khaizuron, Sarah Larasti Yogantari Marfuatun, Marfuatun Metridewi Primastuti Metridewi Primastuti Muldayati, Meitha Nasywa Athaya Khoirunnisa Nur Fitriyana Pramudhana Saputra Primastuti, Metridewi Rahmat Basuki Rr. Lis Permana Sari S. Sugeng Sabar Nurohman Sabar Nurohman Safira Wulaningrum Sela Ivani Hardi Siti Sulastri Sri Handayani Sugeng, S. SULISTIYANI SULISTIYANI Sulistyani Sulistyani Sumarlina, Yenni Sutiman Sutiman Ummi Nur Baiti Wahyuning, Fitri Yanuarista Amelia Yulia Safitri