Bumi Lestari
Bumi Lestari Journal of Environment (p-ISSN: 1411-9668; e-ISSN: 2527-6158) is a peer-reviewed journal, presents original research articles and letters in all areas of environmental studies and environmental sciences (biotic, abiotic and social/cultural). This journal has been indexed by cabdirect cabi.org, AJD (Academic Journals Database), ISJD (Indonesian Scientific Journal Database), IndexCopernicus, Portal Garuda, researchBib and Google Scholar. The journal is published by Environmental Research Center (PPLH) of Udayana University. The journal is published two times a year: February and August in both printed and online versions. The online version is free access and download. This journal is devoted to publish research papers such as environmental biology, environmental physics, environmental health, ecology, geosciences and environmental chemistry including such matters as land, water, food, conservation, population, risk analysis, pollution, energy, economics of ecological and non-ecological approaches, social advocacy of arguments for change, analytical methods, legal measures, implications of urbanism, energy choices, waste disposal, health effects, recycling, transport systems, political approaches, social impacts and other issues of mass society. There is concern also for marginal areas, under-developed societies, minorities, species loss, etc. The purpose of this journal is to provide input and its solution to the environmental problems that has happened or will be happen from the results of researchs.
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PEMANFAATAN KEMBALI LIMBAH PADAT LUMPUR PDAM UNTUK PENJERNIHAN AIR DARI SUNGAI MARTAPURA KALIMANTAN SELATAN
Agus Mirwan
Bumi Lestari Journal of Environment Vol 12 No 1 (2012)
Publisher : Environmental Research Center (PPLH) of Udayana University
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TThis research aimed to investigate the recovery process of liquid alum derived from sludge solid waste (SSW) Regional Water Company (PDAM) Intan Banjar and the decrease in turbidity and pH of water from Martapura river after the treatmen with recovered liquid alum and other commercial coagulant via coagulation and flocculation. Recovery process was done by dissolving SSW with NaOH and NH4 solution in a flask while stirring and boiling. Then a solution of NH4OH was added to precipitate Al(OH)3 before it was filtered and washed with NH4Cl solution and then it was dried to get dry cake solids. The next process was the reaction between these dry cake solid with H2SO4 to obtain liquid alum. The results showed that liquid alum from SSW-PDAM intan Banjar can be used to reduce turbidity from 43.40 NTU to 7.49 NTU and pH 6.67 to 6.48. While the other commercial coagulants were alum solid coagulant, PAC, FeCl3 and FeSO4 were reduced to 2.11, 1.77, 1.82, and 6.96 for pH respectively. And became to 6.43 NTU, 6.36 NTU, 6.08 NTU, and 28.10 NTU for turbidity respectively.
IDENTIFIKASI SENYAWA BIOAKTIF ANTIFEEDANT DARI ASAP CAIR HASIL PIROLISIS SAMPAH ORGANIK PERKOTAAN
Abdul Gani Haji;
Zainal Alim Mas’ud;
Gustan Pari
Bumi Lestari Journal of Environment Vol 12 No 1 (2012)
Publisher : Environmental Research Center (PPLH) of Udayana University
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The research aims to identify antifeedant bioactive substance in liquid smoke derived from pyrolisis of organic municipal waste. Samples were pyrolyzed in drum reactor at 505oC for five hours to produce char and condensed smoke turning into liquid smoke. The liquid smoke components are separated into n-heksan, etil asetat, metanol and water consecutively. The result is thickened with rotary evaporator. The resulting crude’s activity towards Spodoptera litura Linn larvae was tested with antifeedant method. The chemical components of active fraction are identified with GCMS. Crude resulting from thickening fractions of n-heksan, etil asetat, metanol and water are 0.3465 g; 2.3736 g; 0.8775 g and 0.3679 g consecutively. The highest activity of liquid smoke, fractions of water, methanol, etil asetat and n-heksan towards S. litura larvae at 1.00% concentration are 44.68%; 62.07%; 80.65%; 28.57% and 23.40%. Result of probit analysis towards these fractions shows that the highest activity is methanol fraction with EI50 value at 0.71. Identification with GCMS shows that the fractions contain 14 types of bioactive antifeedant substances with ?-butyrolacton as the main component