Ningsih, Ratna
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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