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All Journal JURNAL TEKNOLOGI LINGKUNGAN JEM17: Jurnal Ekonomi Manajemen Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan
Ningsih, Ratna
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Economics, Econometrics & Finance Education Environmental Science

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FOTOKATALISIS ORGANIK KMNO4, SURFAKTAN DAN AMONIAK DALAM INLET WADUK MUARA BARU, JAKARTA UTARA MENGGUNAKAN SINAR UV DENGAN KATALISATOR TIO2 = Organic Photocatalytic KMnO4, Surfactants and Ammonia in Muara Baru Basin Inlet, North Jakarta using UV Rays with TiO2 Catalyst Lindu, Muhammad; Ardyarini, Putri; Ningsih, Ratna
Jurnal Teknologi Lingkungan Vol. 14 No. 2 (2013)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (733.725 KB) | DOI: 10.29122/jtl.v14i2.1428

Abstract

This research studied about photocatalysis that used TiO2 0.1% as catalisator to polluted water from Waduk Pluit, Muara Baru, North Jakarta. In order to decrease polluted agents like surfactant, KMnO4 organic, and ammoniac that will use as source of clean water. Research was conducted in batch reactor about 30x20 cm and used UV-C 15 watt x 2 lamps, and TiO2 as suspension. In this research, batch reactor that contained standard water was supplied by air with aerator 220v/100v 18 watt. Result showed that photocatalysis with TiO2 0.1% as catalisator decreased surfactant and KMnO4 organic about 80.98% and 9.48%, respectively. In contrary, ammoniac was increased about 325% Pollutants content in processed clean waterwere about 0.12 mg/l, 35.5.mg/l, and 4.93 mg/l, respectively. Result were met requirement for clean water standard as Health Ministry Decree No. 416/MENKES/PER/1X/1990 about clean water quality recuirement and controlling. Keywords: photocatalytic, organic compound, ammoniac, surfactantAbstrakDalam penelitian ini telah dilakukan studi fotokatalisis menggunakan katalisator TiO2 0.1% terhadap air baku Waduk Pluit, Muara Baru, Jakarta Utara yang tercemar untuk menurunkan kandungan bahan-bahan pencemar yaitu deterjen (surfaktan), senyawaorganik permanganat dan amoniak, yang akan digunakan sebagai sumber air baku air bersih. Penelitian dilakukan dalam reaktor batch dengan ukuran 30x20 cm, menggunakan lampu UV-C 15 watt x 2, dan TiO2 berupa suspensi. Dalam penelitian ini reaktor batch yang berisi air baku di suplai udara dengan aerator 220v/100v 18 watt. Hasil penelitian menunjukkan bahwa penggunaan fotokatalisis dengan katalisator TiO2 0.1% telah mampu menurunkan kandungansurfaktan (deterjen) dan senyawa organik permanganat masing-masing sebesar 80.98% dan 9.48%, sedangkan terjadi kelonjakan pada pembentukan amoniak sebesar 325%. Dengan hasil ini kandungan ketiga polutan dalam olahan air bersih yang dihasilkan masing-masing 0.12 mg/l, 35.5.mg/l, dan 4.93 mg/l. Hasil mendekati sesuai dengan baku mutu yang diatur didalam Permenkes No. 416/MENKES/PER/1X/1990 tentang syarat-syarat dan pengawasan kualitas air bersih.Kata kunci : fotokatalisis, senyawa organik, amoniak, surfaktan
ANALISIS RETURN SAHAM BLUE CHIP DAN NON BLUE CHIP TERHADAP SAHAM YANG TERGABUNG DALAM INDEKS LQ45 DI BURSA EFEK INDONESIA TAHUN 2015 budiarti, endah; ningsih, ratna; penangsang, parikesit
JEM17: Jurnal Ekonomi Manajemen Vol 2 No 1 (2017)
Publisher : Fakultas Ekonomi dan Bisnis, Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.771 KB) | DOI: 10.30996/jem17.v2i1.1194

Abstract

ABSTRAKWhen first investing in stock securities on the Stock Exchange, an investor will experience confusion in choosing what stocks can generate future profits. While in the market there are stock companies that have a long history as a Market Leader. Its products are very popular with consumers. Thus the level of profits of large companies and will continue to increase. Such shares are called Bluechips, while companies whose products are not Market Leaders are categorized as Non Bluechips shares. Based on research conducted on return (profit rate) on stocks that categorized Bluechips and Non Bluechips can be analyzed that during observation of shares of Bluechips included in LQ 45 year 2015 yield negative Average return equal to -0.000550324 but if tested statistically return is not different from zero. While Non Bluechips share return produces a larger return, but if tested statistically also shows results that are not different from zero. It can be concluded that investing in both Bluechips and Non Bluechips shares is the same. However, it is nominally more profitable to invest in Non Bluechips shares. Keyword : Return, Bluechips,  Non Bluechips
Pengembangan Perangkat Pembelajaran Berbasis Problem Based Learning untuk Meningkatkan Kinerja dalam Menyusun Laporan Siswa SMA Ningsih, Ratna; Asbar, Andi Ichrar; Masruhim, Muh. Amir
Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan Vol. 1, No. 11
Publisher : citeus

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

Abstract

This study aims to analyze the validity, practicality and effectifity of the development of learning tools through the test of control class, test of treatment class and the effectivity test in order to produce biology learning tools based PBL (problem based learning) that valid, practical and effective to improve performance in prepared a report to 11th grade of high school students. The development of the learning tools refers to a Borg and Gall development model. Data was collected using observation sheets, validation sheet, questionnaire, and test. Methods of data analysis done by quantitative descriptive analysis of the needs analysis, the validity and practicality of the learning tools. The effectifity of the learning is done by pretest posttest. Effectifity of learning tools analyzed by paired t-test. Results showed that the learning tools otherwise (1) very valid with a percentage of 98.91%, (2) practical with a percentage of 84,68%, and (3) effective with Tvalue amounting to 3,51 (Tvalue> Ttable) at significance level of 5%. Based on the results of this study concluded that the PBL Based Learning has met the criteria perfectly valid, prractical, and effective way to improve performance in preparing the reports of students through learning biology in high school, so it can be used in a broader scope.
Co-Authors Anak Agung Istri Sri Wiadnyani Ardyarini, Putri Asbar, Andi Ichrar Febriana, Fitri Masruhim, Muh. Amir Muhammad Lindu penangsang, parikesit