Fahmiati Fahmiati
Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Haluoleo, Kendari

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Sintesis dan Karakterisasi Adsorben Lempung Terimpregnasi Oleh 3-merkapto-1,2,4-triazol (trzsh) Fahmiati, Fahmiati
Jurnal Progres Kimia Sains Vol 1, No 2 (2011): JPKS Open Access
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (511.122 KB)

Abstract

Impregnation of clay is one of method to increase the adsorption capacity. Synthesisand characterization of clay impregnated 3-mercapto-1,2,4-triazole (TRZSH) has beencarried out. Functional groups of clay was characterized by infrared spectrophotometry whileBET test was performed to determine its specific surface area and porosity. Results showedthat clay impregnated TRZSH comprises silanol (Si-OH), siloksan (Si-O-Si), C-N, C=N, andSH. Spesific surface area of clay impregnated TRZSH of 184.04 m2/g. Such it has porosityvolume and radius of porosity of 123.902 x 10-3 cm/g and 134.672 A, respectively.
PENINGKATAN HASIL BELAJAR IPA TERPADU MELALUI MODEL PEMBELAJARAN KONTEKSTUAL Fahmiati, Fahmiati
JURNAL NALAR PENDIDIKAN Vol 2, No 2 (2014): JURNAL NALAR PENDIDIKAN
Publisher : LPM Penalaran UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jnp.v2i2.1973

Abstract

Penelitian ini bertujuan untuk mendeskripsikan peningkatan hasil belajar IPA Terpadu melalui model pembelajaran kontekstual pada siswa kelas VII.E SMP Negeri 33 Kota Makassar. Penelitian ini merupakan penelitian tindakan kelas model siklus, fokus penelitian adalah pembelajaran kontekstual dan hasil belajar. Subjek penelitian adalah siswa kelas VII.E sebanyak 31 orang. Pengumpulan data menggunakan observasi, tes dan dokumentasi, sedangkan data hasil penelitian dianalisis menggunakan analisis deskriptif. Hasil penelitian adalah hasil belajar IPA Terpadu siswa meningkat melalui model pembelajaran kontekstual di kelas VII.E SMP Negeri 33 Kota Makassar. Siklus pertama, hasil belajar IPA Terpadu pada kategori cukup tetapi belum mencapai ketuntasan belajar yang diharapkan, kemudian siklus kedua meningkat menjadi kategori baik sekali dan telah mencapai ketuntasan belajar yang diharapkan. Peningkatan hasil belajar IPA Terpadu melalui model pembelajaran kontekstual didukung oleh peningkatan aktivitas mengajar guru dalam menerapkan langkah-langkah model pembelajaran kontekstual, dan aktivitas belajar siswa mengikuti pelajaran IPA Terpadu dari awal hingga akhir pembelajaran.Kata Kunci: Pembelajaran Kontekstual IPA Terpadu , Aktivitas Belajar, Hasil Belajar.
ADSORPTION THERMODYNAMICS OF Cd(II), Ni(II), AND Mg(II) ON 3-MERCAPTO-1,2,4-TRIAZOLE IMMOBILIZED SILICA GEL Fahmiati, Fahmiati; Nuryono, Nuryono; Narsito, Narsito
Indonesian Journal of Chemistry Vol 6, No 1 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.279 KB) | DOI: 10.22146/ijc.21773

Abstract

Thermodynamics study of Cd(II), Ni(II), and Mg(II) adsorption on silica gel immobilized with 3-mercapto-1,2,4-triazole (SG-SH) has been carried out. Three thermodynamic parameters namely adsorption capacity, equilibrium constant and adsorption energy were determined using model of Langmuir adsorption isotherm. Process of adsorption was carried out by mixing metal ion solution in various concentrations (5 - 400 mg/L) with adsorbent in a batch system. The un-adsorbed ions were determined by Atomic Absorption Spectrophotometry (AAS) and the adsorbed ions were differences of ion concentration in solution before and after adsorption process. Parameters of thermodynamics i.e. capacity (a), equilibrium constant (K) and adsorption energy were determined by using the correlation curve of ratio of equilibrium concentration to the amount of adsorbed metal ions versus equilibrium concentration. Results showed that adsorption of metal ions Ni(II), Cd(II) and Mg(II) on adsorbent of silica gel immobilized with mercapto groups tend to follow Type I (monolayer) of Brunauers classification. Evaluation of thermodynamic adsorption showed that the order of adsorption capacity was Ni(II) < Cd(II) < Mg(II) with relatively low energy adsorption, in a range  of 12 - 18 kJ/mole.   Keywords: adsorption, silica gel, mercapto, thermodynamics, immobilization