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All Journal Jurnal Pendidikan IPA Indonesia Indonesian Journal of Mathematics and Natural Sciences
A. T. Prasetya
Jurusan Kimia, FMIPA, Universitas Negeri Semarang, Indonesia
Education Mathematics

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PENERAPAN PENDEKATAN AESOP’S BERBANTUAN GUIDANCE WORKSHEET TERHADAP HASIL BELAJAR SISWA -, Sudarmin; Prasetya, A. T.; Pahlevi, M.
Jurnal Pendidikan IPA Indonesia Vol 1, No 2 (2012): October 2012
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v1i2.2129

Abstract

Penelitian ini bertujuan untuk mengetahui apakah penggunaan pendekatan Aesop’s berbantuan Guidance Worksheet berpengaruh terhadap hasil belajar siswa materi pokok hidrokarbon dan setelah penerapannya menambah keefektifan belajar siswa di SMAN 11 Semarang. Penelitian ini menggunakan desain eksperimen nyata. Berdasarkan hasil penelitian dapat disimpulkan pendekatan Aesop’s berbantuan Guidance Worksheet berpengaruh terhadap hasil belajar kimia materi pokok hidrokarbon dan setelah penerapannya menambah keefektifan belajar siswa di SMAN 11 Semarang.   The aims research to determine the effect of Aesops approach assisted Guidance Worksheet on student learning acievement and the effectiveness after learning to increase student understanding in SMAN 11 Semarang. This research used a true experimental design. Based on the research analysis can be concluded Aesops approach assisted Guidance Worksheet effect on learning acievement hydrocarbon subject matter and the effectiveness after the application to increase student understanding at SMAN 11 Semarang.
ADSORPSI KROM(VI) OLEH ARANG AKTIF SERABUT KELAPA SERTA IMOBILISASINYA PADA BATAKO Zuhroh, N.; Prasetya, A. T.; Haryani, S.
Jurnal MIPA Vol 39, No 1 (2016): April 2016
Publisher : Jurnal MIPA

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Abstract

Penelitian ini bertujuan untuk mengimobilisasi limbah arang aktif serabut kelapa yang telah menyerap ion logam Krom(VI) sebagai bahan campuran batako. Pada penelitian ini, arang dan arang aktif serabut kelapa dibandingkan kualitasnya dengan parameter uji kadar air, uji kadar abu dan uji daya adsorp iod. Krom(VI) diadsorpsi oleh arang aktif serabut kelapa untuk mengetahui pH optimum (1, 3 ,5, 7, dan 9) dan waktu kontak optimumnya (10, 30, 60, 120, dan 150 menit). Limbah arang aktif hasil adsorpsi selanjutnya dicampurkan pada batako. Batako direndam ke dalam larutan pendesorpsi pafa pH 1, 5, 7, 9, dan 13 selama satu minggu. Hasil penelitian menunjukkan arang aktif serabut kelapa memiliki kualitas yang lebih baik daripada arang serabut kelapa. Arang aktif serabut kelapa memiliki kadar air sebesar 4,57%, kadar abu sebesar 3,71% dan daya adsorp terhadap iod sebesar 414,9119 mg/g. Sedangkan pada arang serabut kelapa memiliki kadar air sebesar 9,10%, kadar abu sebesar 4,28% dan daya adsorp terhadap iod sebesar 302,9929 mg/g. pH dan waktu kontak optimum yang diperlukan arang aktif serabut kelapa untuk menurunkan kadar Krom(VI) adalah pada pH 3 dan pada waktu 2,5 jam. Konsentrasi Krom(VI) yang dilepaskan pada  pH 1, 5, 7, 9, dan 13 tidak terdeteksi sedangkan ketentuan baku mutu TCLP zat pencemar limbah untuk logam berat krom maksimal 5 ppm.This research aims to immobilize active charcoal of coconut fibers wich have adsorbed Chromium(VI) ion as a mixture of brick. In this research, active charcoal and charcoal of coconut fibers will be compared to determine its quality using parameter test of water content, ash content and iod adsorption. Chromium(VI) was adsorbed by activated charcoal of coconut fibers to determine the optimum pH (1, 3 ,5, 7 and 9) and optimum contact time (10, 30, 60, 120 and 150 minute). Then, the activated charcoal will be used to make the brick. The brick is soaked in the solution at pH 1, 5, 7, 9and 13 for one week. The result shows that activated charcoal of coconut fibers have better quality than charcoal of coconut fibers. The water content of activated charcoal of coconut fibers is 4.57%, the ash content is 3.71% and the absorption of iodine is 414.9119 mg/g. While the water content of charcoal of coconut fibers is 9.10%, the ash content is 4.28% and the absorption of iod is 302.9929 mg/g. The optimum pH and equilibrium time that are required by activated charcoal of coconut fibers to reduce levels of Chromium(VI) is  on pH 3 and time 2.5 hours. The concentration of Chromium(VI) at pH 1, 5, 7, 9 and 13 is not detected while the standard quality of provisions contaminants TCLP heavy metal chromium waste for a maximum of 5 ppm. 
Building The Character of Pre-Service Teachers through The Learning Model of Problem-Based Analytical Chemistry Lab Work Haryani, S.; Prasetya, A. T.; Bahron, H.
Jurnal Pendidikan IPA Indonesia Vol 6, No 2 (2017): October 2017
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v6i2.10688

Abstract

This research aims to apply and find out the characteristics of Problem-Based Instrumental Analysis of Chemistry Lab Work Learning Model (IACLLM) which is able to build the characters, improve the conceptual mastery and the ability of problem solving. The research using experimental quasy with 2 student groups of pre service chemistry teachers as the subjects of the research applied the treatment of problem-based IACLLM for the experimental class and lab work learning with standard lab work procedure in control class. Conceptual mastery was measured using essay test; problem solving skills were measured using assessment of problem solving reports, presentation of the results, and kit making products; whereas the emerged characters were observed during the learning process. The result of this research showed that problem-based IACLLM had open-ended problem characteristic, had produced local material kit, and characters were observed in every stage of problem-based learning model. The implementation of the model could improve the spectrometric and electrometric conceptual mastery, the problem solving skills on a very good level and also some characters were developing during learning process, including religious, discipline, honest, curious, creative, critical, cooperative, communicative, independent, and able to appreciate other people’s opinions and achievements, leadership, democracy, and able to be thorough and careful, and hardworking.
PENERAPAN PENDEKATAN AESOP’S BERBANTUAN GUIDANCE WORKSHEET TERHADAP HASIL BELAJAR SISWA -, Sudarmin; Prasetya, A. T.; Pahlevi, M.
Jurnal Pendidikan IPA Indonesia Vol 1, No 2 (2012): October 2012
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v1i2.2129

Abstract

Penelitian ini bertujuan untuk mengetahui apakah penggunaan pendekatan Aesop’s berbantuan Guidance Worksheet berpengaruh terhadap hasil belajar siswa materi pokok hidrokarbon dan setelah penerapannya menambah keefektifan belajar siswa di SMAN 11 Semarang. Penelitian ini menggunakan desain eksperimen nyata. Berdasarkan hasil penelitian dapat disimpulkan pendekatan Aesop’s berbantuan Guidance Worksheet berpengaruh terhadap hasil belajar kimia materi pokok hidrokarbon dan setelah penerapannya menambah keefektifan belajar siswa di SMAN 11 Semarang.   The aims research to determine the effect of Aesop's approach assisted Guidance Worksheet on student learning acievement and the effectiveness after learning to increase student understanding in SMAN 11 Semarang. This research used a true experimental design. Based on the research analysis can be concluded Aesop's approach assisted Guidance Worksheet effect on learning acievement hydrocarbon subject matter and the effectiveness after the application to increase student understanding at SMAN 11 Semarang.
ADSORPSI KROM(VI) OLEH ARANG AKTIF SERABUT KELAPA SERTA IMOBILISASINYA PADA BATAKO Zuhroh, N.; Prasetya, A. T.; Haryani, S.
Indonesian Journal of Mathematics and Natural Sciences Vol 39, No 1 (2016): April 2016
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk mengimobilisasi limbah arang aktif serabut kelapa yang telah menyerap ion logam Krom(VI) sebagai bahan campuran batako. Pada penelitian ini, arang dan arang aktif serabut kelapa dibandingkan kualitasnya dengan parameter uji kadar air, uji kadar abu dan uji daya adsorp iod. Krom(VI) diadsorpsi oleh arang aktif serabut kelapa untuk mengetahui pH optimum (1, 3 ,5, 7, dan 9) dan waktu kontak optimumnya (10, 30, 60, 120, dan 150 menit). Limbah arang aktif hasil adsorpsi selanjutnya dicampurkan pada batako. Batako direndam ke dalam larutan pendesorpsi pafa pH 1, 5, 7, 9, dan 13 selama satu minggu. Hasil penelitian menunjukkan arang aktif serabut kelapa memiliki kualitas yang lebih baik daripada arang serabut kelapa. Arang aktif serabut kelapa memiliki kadar air sebesar 4,57%, kadar abu sebesar 3,71% dan daya adsorp terhadap iod sebesar 414,9119 mg/g. Sedangkan pada arang serabut kelapa memiliki kadar air sebesar 9,10%, kadar abu sebesar 4,28% dan daya adsorp terhadap iod sebesar 302,9929 mg/g. pH dan waktu kontak optimum yang diperlukan arang aktif serabut kelapa untuk menurunkan kadar Krom(VI) adalah pada pH 3 dan pada waktu 2,5 jam. Konsentrasi Krom(VI) yang dilepaskan pada  pH 1, 5, 7, 9, dan 13 tidak terdeteksi sedangkan ketentuan baku mutu TCLP zat pencemar limbah untuk logam berat krom maksimal 5 ppm.This research aims to immobilize active charcoal of coconut fibers wich have adsorbed Chromium(VI) ion as a mixture of brick. In this research, active charcoal and charcoal of coconut fibers will be compared to determine its quality using parameter test of water content, ash content and iod adsorption. Chromium(VI) was adsorbed by activated charcoal of coconut fibers to determine the optimum pH (1, 3 ,5, 7 and 9) and optimum contact time (10, 30, 60, 120 and 150 minute). Then, the activated charcoal will be used to make the brick. The brick is soaked in the solution at pH 1, 5, 7, 9and 13 for one week. The result shows that activated charcoal of coconut fibers have better quality than charcoal of coconut fibers. The water content of activated charcoal of coconut fibers is 4.57%, the ash content is 3.71% and the absorption of iodine is 414.9119 mg/g. While the water content of charcoal of coconut fibers is 9.10%, the ash content is 4.28% and the absorption of iod is 302.9929 mg/g. The optimum pH and equilibrium time that are required by activated charcoal of coconut fibers to reduce levels of Chromium(VI) is  on pH 3 and time 2.5 hours. The concentration of Chromium(VI) at pH 1, 5, 7, 9 and 13 is not detected while the standard quality of provisions contaminants TCLP heavy metal chromium waste for a maximum of 5 ppm. 
Co-Authors Bahron, H. M. Pahlevi N. Zuhroh, N. S. Haryani Sudarmin -