Karakterisasi karbon aktif dari Green Coke dengan perlakuan kimia (Na OH).

Green coke adalah hasil sainping dari destruksi minyak meritah, yang pemanfaatannya sebagiari besar sebagai bahan bakar. Untuk menambah riilai ekonomisnya maka perlu dilakukan pengembangan potensi lain dari green coke yaitu sebagai karbon aktif. Telah dibuat karbon aktif dari green coke dengan perlakuan kimia t'TaOH ,sienganyariasi00,1 H, 0,5 N, 1,0 N dengan temperatur 350 C, 450 C, 550 C, 650c, C. Karbcn aktif hasil percobaan untuk yang terbaik diperoieh pada NaOH sebesar 1,0 N dengan temperatur 650 C dengan kadar air 4,465 %; zat volatile matter 9,295 %; kadar abu 2,927 %; kadar karbon murni 83,085 %; daya scrap terhadap metileri Flue 8,25 ml/gram clan luas permukaan sebesar 51,1349 m is gram. Green coke is the residue of the destructive of crude oil , the mayor uses of green •coke is the burning material, to increase the economic value , it mustbe to developed to use of active carbon. Activated carbon have been made from green coke with NaOH chemical treatment with variety 400,1 N, N and temperature variety is 350°C, 450 C, 550°C, 650°C. C. Characterization for yield activated carbons could be obtained the best for KA 1,0 N NaOH - 650,C with _Moisture 4,645 %, Volatile Matter 9,295 %, Ash Content 2,975 %, Fixed' Carbon 83,085 % , Adsorption getilen of Blue 8,25 ml / gram and Surface area 51,1349 m/ gram

Konstruksi Media Tentang Serangan Israel Terhadap Libanon (Analisis Framing Terhadap Berita Tentang Peperangan Antara Israel Dan Libanon Dalam Surat Kabar Kompas Dan Republika)

This research questioned Kompas and Republika in the term of their construction regarding Israel attact on Lebanon in 2006. This result showed that their construction were different to each other. Kompas elucidated the war between Israel and Lebanon was caused by status quo organization which seized two Israelian soldiers and the organization was uncooperative. The organization was Hizbullah. Meanwhile, Republika regarded Israel as an agressor state that wanted to expand its border zona by building new middle east

Penanggulangan Pengemis dan Gelandangan di Kota Pekanbaru

Keadaan sosial ekonomi yang belum mencapai taraf kesejahteraan sosial yang baik, menyeluruh dan merata dapat berakibat meningkatnya gelandangan dan pengemis terutama di kota-kota besar. Kota Pekanbaru tumbuh secara baik dan bahkan menjadi pusat pertumbuhan ekonomiditandai dengan berdirinya kantor-kantor, pusat perbelanjaan, sarana perhubungan, pabrik, sarana hiburan dan sebagainya mendorong para urban untuk mengadu nasib diKota Pekanbaru, sehingga gelandangan dan pengemis tumbuh menjamur seperti pertumbuhan kota itu sendiri

Problematika Pembangunan Pedesaan

Pembangunan masyarakat desa merupakan proses dimana masyarakat desa dapat merencanakan atau menerima USAha-USAha pembaharuan dalam meningkatkan taraf hidup, tentunya perencanaan ini sebaiknya dilakukan oleh masyarakat desa itu sendiri. Pembangunan dilakukan menurut ketentuan yang telah ditetapkan oleh pemerintah pusat, kemudian diterapkan untuk setiap daerah dengan mengunakan pola yang sama tentu mendapat kendala, karena setiap daerah mempunyai karakterisrik lingkungan masyarakat yang berbeda-beda sehingga perlu diterapkan suatu sistem yang sesuai dengan karakteristik yang dimilikinya

Efek Salinitas Rendah Terhadap Tingkat Kerja Osmotik Dan Pertumbuhan Udang Windu (Penaeus Monodon Fab)

For a long time fish farmers used mangrove and marginal area of low salinity for tiger prawn (Penaeus monodon Fab) pond culture. The objective of this study was to know osmotic work level and growth of tiger prawn stocked in low salinity medium. Study carried out from may to July 2001 at the Aquaculture Laboratory, Department of Fishery, Fishery and Marine Science. Faculty, Diponegoro University Semarang. Study was performed with laboratory experiment, in which 4 salinity levels treatment and 3 replications were administered. The treatment was A (2%), B (6%), C (10%), and D (15%). Twelve buckets with the volume of 35 l each were used as the medium. Four tiger prawns with individual weight ranged from 2,48g to 2,60g were stocked in each of bucket. Osmotic work level growth of tiger prawns and water quality during the experiment were used as indicators the effect of different levels salinity. The result of study revealved that osmotic work level at the premolt phase in treatment A,B, C and D was 528.55, 528.41, 566.32, and 130.69mOsm/H2O respectively. At the molt phase, it was 786.33, 574.61,559,40 and 124.73 mOsm/l H2O respectively, and at the intermolt phase it was 528.93, 425.08, 330.35 and 127.25 mOsm/l H2O respectively. Growth of the prawn in the treatment A,B,C, and D was 0,30 , 0,47 , 0,48 , and 0,56 g respectively. The study recorded increasing osmotic work level and descreasing growth of tiger prawns along with decreasing salinity levels

Distribution of 226Ra Radionuclide in Upwelling Event Off Ulsan, Gampo and Pohang, Korea

Upwelling is an important event in the sea for it makes the area to become more productive. The objective of this study is to determine the distribution of radium-226 as radiotoxic in the upwelling area in the summer season. Measurements of the horizontal and vertical activities of 226Ra in the Ulsan, Gampo and Pohang waters were conducted in June, August 1999 and June 2000 when the upwelling event was expected to occur. Water temperature, salinity and dissolved oxygen (DO) were also measured concurrently. The thermocline layer or the layer where the temperature decreased drastically occurred at a depth between 30 m to 100 m for samples dated June 1999 and 30 m to more than 100 m for samples dated August 1999 and June 2000. The salinity decreased with depth but the DO concentration increased in this layer. The condition affected the vertical distribution of 226Ra in the study area, where the 226Ra activities showed to be relatively homogeneous vertically in each station. This indicates that the upwelling which occurred in the study area was capable to distribute the 226Ra activities from the bottom to the surface. Thus, the 226Ra distribution at that time did not increase with depth, opposite to what usually occurs in the ocean at normal condition. The 226Ra activities also did not decrease after elapsed time of one year, in fact, it increased. However, horizontally the 226Ra activities decreased with increasing distance from the coastal zone. Based on these results, it can be concluded that the upwelling event in the Ulsan, Gampo and Pohang was effective for increasing the 226Ra activities and was capable to create homogeneous 226Ra activities from the bottom to the surface in the water column, and the source of 226Ra was likely to originate from outside area (i.e. coastal zone) and bottom area.Received: 25 March 2009; Revised: 24 August 2009; Accepted: 30 September 200

Kamus Fisika : mekanika kuantum

vi.105 hal.;21 c