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Study on Heat Island Effect Induced by Land Use Change Increased Temperature in Metropolitan Jakarta Lestari, Sopia; Moersidik, Setyo S.; Syamsudin, Fadli
Journal of Mathematical and Fundamental Sciences Vol 47, No 2 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (996.842 KB) | DOI: 10.5614/j.math.fund.sci.2015.47.2.2

Abstract

The heat island (HI) effect in metropolitan Jakarta was studied using air temperature measurements at 9 meteorological stations in Jakarta, Tanjung Priok, Serang, Halim, Cengkareng, Pondok Betung, Curug, Bogor, Citeko during 1986-2008 and Serpong during 2008-2011 and 2013; land use for forest, industry, water, settlement, open/cleared land in 1997, 2004, 2009, 2012; and total number of industries and total number of vehicles during 1986-2011. Harmonic analysis was used to remove the seasonal component from the temperature time series data, which was filtered with the 30-day moving average technique to capture trends whose significance was tested with the Mann-Kendall method. The results show that industry was a major factor in land use change over Jakarta with an increasing growth/year of 502 ha (9.76%) concentrated in the eastern part of Jakarta from 1997 to 2012. Industry had a spatial cover change similar to deforestation and open/cleared land expansion, especially in Jakarta from 2009 to 2012: 38.8%/year (industry), 8.3%/year(deforestation), and 13.8%/year (open/cleared land). The HI effect increased the temperature trend rate/year in Jakarta, Tanjung Priok, Serang, Halim, Pondok Betung, Cengkareng, Curug, and Bogor about 0.051°C, 0.021°C, 0.018°C, 0.012°C, 0.006°C, 0.006°C, 0.005°C, and 0.004°C from 1986 to 2008, respectively, equivalent to average warming in the city, suburban, and mountainous areas of around 2.5°C, 0.6°C, and 0.4°C, respectively within 100 years from 2009.
KAJIAN KARAKTERISTIK MUARA CILIWUNG DENGAN MODEL BUDGET NITROGEN Suryono, Devi Dwiyanti; Moersidik, Setyo S.
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 22, No 1 (2015)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Perairan muara merupakan perairan yang mempunyai karakteristik yang khas karena dipengaruhi oleh faktor hidrodinamika dan pola musim, yaitu musim timur dan musim barat. Tujuan penelitian ini adalah untuk mengaplikasikan metode perhitungan biogeokimia berdasarkan pendekatan LOICZ pada perairan muara Ciliwung dan memperoleh informasi tentang karakteristik nitrogen pada perairan muara Ciliwung. Berdasarkan hasil analisis diketahui bahwa pada musim timur dan musim barat perairan muara Ciliwung berperan sebagai nitrogen. Pada musim timur perairan muara Ciliwung bersifat autotrofik, sedangkan pada musim barat perairan tersebut bersifat heterotrofik. Hal ini dicirikan melalui siklus nitrogen dengan laju fiksasi lebih besar daripada laju respirasi pada musim timur, sedangkan pada musim barat yang terjadi adalah sebaliknya, laju respirasi lebih besar dibandingkan dengan laju fiksasinya, sebesar 21,14 mg/hari. Normal 0 false false false EN-US X-NONE X-NONE   
POTENSI DAN OPTIMALISASI PRODUKTIVITAS NIRA NIPAH (NYPA FRUTICANS) DARI METODA PENYADAPAN TRADISONAL KE TEKNOLOGI NON KONVENSIONAL Hadi, Sopyan; Thamrin, Thamrin; Moersidik, Setyo S.; Bahry, Syaiful
Bumi Lestari Journal of Environment Vol 14 No 2 (2014)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

The utilization of non-timber forest products of mangrove palm (Nypa fruticans Wurmb) ofsap produced through the process of tapping,  is still made   by the traditional way with theamount of sap production is still small or limited for consumption purposes. Sap whichcontains sugar has a potency to be fermented  into ethanol which is a source of greenenergy. The problem is the amount of available sap as raw material obtained by traditionaltapping is still limited, therefore, more efforts to increase productivity are needed. Thepurpose of this study was to explore several methods of tapping palm from traditional waytowards  non-conventional technologies. This study used an experimental method examiningseveral factors including 1) Duration of pre-tap (10 days, 20 days, 30 days) 2). Pre-tappingstimulation (without and with stimulation) 3) Type of container (non-vacuum container(traditional), 1.5 L small vacuum container, 2L medium vacuum container  and 20L largevacuum containers). 4) The level of luxuriance palm leaf midrib (not dense 0-2 midrib, lessdense 3-4 midrib and dense > 4 midrib). Observed variables are sap volumes include volumesof palm sap/stem, sugar, tapping duration/stem. The result obtained from tapping processon mangrove forest in Lubuk Muda Village, Siak Kecil District, Bengkalis Regency RiauProvince showed that optimal productivity were obtained on 1). Pre-tapping stimulationat 30 days. 2) Treatment with pre-tapping stimulation. 3) Harvesting on the medium vacuumcontainer and 4) found in dense leaf midrib.
SORPTION ANALYSIS OF 137CS ON KARAWANG’S CLAY SAMPLES Setiawan, Budi; Prihastuti, Suci; Moersidik, Setyo S.
Aceh International Journal of Science and Technology Vol 5, No 3 (2016): December 2016
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.5.3.5749

Abstract

The objective of this work is to characterize the specific of distribution coefficient (Kd) values of 137Cs onto Karawang?s clay for radioactive waste disposal facility purpose. Sorption phenomena was affected by contact time, ionic strength and loaded concentration of CsCl.  Experiments were done in a batch method, with initial concentration was 10-8 M CsCl in the experiments of contact time and ionic strength effects. In the CsCl loading experiment, the concentration was varied from 10-8 to 10-4 M CsCl and 137Cs radioactive solution was used as a tracer. The solid-liquid ratio is 10-2 g/mL.  The results shown that obtained Kd values were 21,714 and 4035 mL/g after contacted for 8 days for Sample-1 and 2, respectively. The presence of K+ and Na+ ions in solution had reduced the Kd value Cs-137 where the effect of K+ is greater than Na+ on decreased the value of Kd.  The increasing of CsCl concentrations in solution had reduced the value of Kd.  In both samples of clay were closely fit to Freundlich isotherm and pseudo-second order kinetic model.  The results are very useful as the input of the safety assessment activity of site candidate for radioactive waste disposal facility in the future.
PENGOLAHAN AIR LIMBAH DOMESTIK DENGAN ANOKSIK-AEROBIK MOVING BED BIOFILM REACTOR (STUDI KASUS: PENYISIHAN AMONIA DAN KARBON DALAM AIR LIMBAH DOMESTIK) Ningtias, Berliana C.; Moersidik, Setyo S.; Priadi, Cindy R.; Said, Nusa Idaman
Jurnal Air Indonesia Vol 8, No 2 (2015): Jurnal Air Indonesia
Publisher : Center for Environmental Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jai.v8i2.2377

Abstract

Domestic wastewater contains high organic carbon and ammonium concentration which can be treated by moving bed biofilm process. It is a biologycal hybrid between attached and suspended growth process. The purposes of this research were to determine the removal percentage of organic carbon and ammonium concentration in domestic wastewater, and to investigate optimum hydraulic residence time. Experiment was carried out in a laboratory scale to study the combine anoxic and an aerobic reactor condition. The treatment process is preceeded by a 4-week seeding process continued with variation of hydraulic residence time. Based on these results, the removal percentage of COD for each hydraulic residence time of 12, 16, and 20 hours were 75,7%; 83,7%; and 91,0%, the removal percentage of ammonium were 79,4%; 91,0%; and 92,3%. The optimum hydraulic residence time in removing organic carbon and ammonium concentration domestic wastewater using anoxic aerobic MBB is 20 hours. This biological hybrid treatment can be an alternative to remove organic carbon and ammonium in domestic wastewater. Keyword: domestic wastewater, ammonium removal, organic carbon removal, moving bed biofilm reactor