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Green Earth
Published by Universitas Khairun
ISSN : 20896565     EISSN : -     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Arjuna Subject : -
Articles 15 Documents
 1   2 
ADSORPSI LOGAM Ag(I) DAN Ni(II) PADA HIBRIDA AMINO-SILIKA DARI ABU SEKAM PADI Limatahu, Nur Asbirayani
Green Earth Vol 1, No 1 (2012)
Publisher : Green Earth

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Abstract

The research of Amino-silica hybrid(ASH) through process of sol-gel by using compound (3-aminopropyl)-trimetokxysilane(APS) from natrium silicate result processing of rice hull ash adsorption of metal Ag(I) and Ni(II).ASH was prepared out by adding HCl 3 M solution  to the mixture of natrium silicate solution and (3-aminopropyl)-trimetokxysilane. The produced adsorbent was characterized by X-ray diffraction (XRD) and infrared spectrophotometer (FTIR).  Adsorption of metal, was carried out in batch technique (static system). The adsorbed metal ions was quantitatively calculated as difference of ion concentration in metal solution before and after adsorption based on the AAS analyses Key words : rice hull ash, amino-silica hybrid, adsorption
MODELING DYNAMIC SYSTEM FOR MANAGEMENT OF COASTAL AREA ECOSYSTEM OF KENJERAN TO HEAVY METAL CADMIUM (Cd) CONTAMINATION Hasan, Imron; Zam Zam, Zulkifli
Green Earth Vol 1, No 2 (2012)
Publisher : Green Earth

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Abstract

The coastal area represents to a dynamic ecosystem, devided to the coastal land and coastal waters subsystem which each other interconnected. The ecosystem interconnected in environmental represents to a dynamic environmental systems process, where change that happened at one ecosystem will be influence and/or influenced by other ecosystem. The coastal area ecosystem of Kenjeran contaminated by heavy metal cadmium (Cd), its caused by development activity to both subsystem. To dissolve this problem, needed integrated and sustainable management of coastal area ecosystem with the system dynamic approach. This research aim are; (1) analysing amount heavy metals Cd from development activity (insudtrial) at Kenjeran channel, (2) analysing water, sediment quality at Kenjeran channel and water, sediment, bivalvia quality at Kenjeran estuary, and (3) modeling the management of coastal area ecosystem of Kenjeran with Vensim 5.0 software from High Performance System.Method of intake sample waters and sediment conducted to the integrated sampling system, while intake of sample bivalvia in Kenjeran estuary conducted to random. Hereinafter from concentration Cd data obtained, analysed by 2 way of, that is; (1) the statistically use ANOVA, and (2) comparing concentration Cd with water quality and industrial waste standard. Management of coastal area ecosystem of Kenjeran conducted to the system approach, modeling dynamic system to environmental, economic, and population aspect. From result obtained, that industrial waste of electroplating have the cadmium content of mean equaled to 0,0830 mg/ liter, waste of printing office industrial 0,0731 mg/liter, waste of plastic industrial 0,0060 mg/liter and waste of food indutrial 0,0066 mg/liter. The content of cadmium at stream water and sediment in channel of Kenjeran  are 0,0295 mg/liter and 3,8056 mg/liter. While, cadmium content in Kenjeran estuary to each component are 0,0327 mg/liter at sea water, 0,4816 mg/liter at sediment and 0,2081 mg/liter at bivalvia. Scenario simulation of Early Model (without environmental expense) economical profit equaled to Rp. 294.525.000, however, environmental aspect there is tendency to the environmental degradation of coastal area of Kenjeran equaled to Rp. 21.870.000 at the last simulation (20 year) and is not self-financing. So that local government will be non-stoped ladened with the environmental management costs equaled to Rp. 179.633.000. Population increased every year progressively which at the last simulation equaled to 286537 people. It also had contribution to degradation area equaled to Rp.3.581.710. While, result of scenario  simulation 1 (with the environmental expense) equaled to 20 %, yield the clean benefit value of economics activity equaled to Rp. 208.745.000 and the environmental degradation of became Rp. 2.551.420 at the last simulation (20 year). Keywords:  Management, The coastal area ecosystem of Kenjeran, Dynamic System, Cadmium (Cd).
RISK ASSESSMENT OF CLORINE GAS (CL2) AND METHANE (CH4) OF GARBAGE IN DKI JAKARTA USING THE EQC MODELLING AND AIR-WATER MODELING Zam Zam, Zulkifli
Green Earth Vol 1, No 1 (2012)
Publisher : Green Earth

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Abstract

The garbage case nowadays become a main issue every where because it needs serious treatment. The dangers related to the characteristics of materials commonly used in households is the materials that contain chemical compounds amunium (CH4) and chlorine (Cl2). This research used the fugacity model approach from ChemCan model including EQC software model and Air-Water Model, in which the structure of the model meets the rules of contamination verification in chemical pathway. To complete the analysis of the impact, it used Material Safety Data Sheet (MSDS) and CAS Number. The results showed that the distribution of Cl 2 in TPA using Model AirWater  obtined the chlorine concentrations (Cl2) in the air is 1.5 x 10-5 g per m3, 4.32% aerosol, and water 0.015 g/m3. Cl2 compounds found in leachit is 0.015 g/m3 with the ability of evaporation (volatilization) into the air is 3.6 X 107 ug / day. For the distribution of CH4 using the EQC Model In TPA, the concentration of CH4 in the air (level 3) is smaller than in TPS at level 1 and level 2 is greater than, this is due to the TPA has a lot of CH4 reaction and advection into the environment. Reaction and advection in the air increase the amount of CH4 gas in the atmosphere that can cause global warming. Key word: Risk Assesment, Gas Clorine, Gas Metan, Sampah, EQC Model, Air Water Model.
DISTRIBUSI TIMBAL DALAM UDARA AKIBAT EMISI KENDARAAN BERMOTOR DI KAWASAN KAMPUS UGM YOGYAKARTA Robo, Tamrin
Green Earth Vol 1, No 1 (2012)
Publisher : Green Earth

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Abstract

Recently, the increase of motor vehicle number in campus area of Gadjah Mada University Yogyakarta clearly affects air quality. This transportation vehicle was presumably become the source of air pollution such as lead distributed within air. This study is purposed to investigate correlation of motor vehicle density with lead concentration contaminating within air, correlation of land use form and lead concentration, and correlation of climate parameters (temperature, humidity, wind direction and velocity) towards lead concentration within air in Agro street, Colombo street, and Kesehatan street. Sampling was taken using purposive sampling method accorded to the distances from the road (<1 m, 100 m, 200 m and 300) in research’s location. The sampling was taken by means of Low Volume Air Sampler then lead (Pb) is measured using Atomic Absorption Spectrophotometer (AAS). Data analysis was taken using quantitatively descriptive method.The result suggests that there is correlation between density of motor vehicle and lead (Pb) concentration within air. The highest density of motor vehicle was found in Agro street. Lead concentration distributed within air was relatively fluctuated accorded to the distance from road edge; the highest lead concentration was found in Colombo street (0.00395 µg/m3) with distance of < 1 m and the lowest was found in Agro street (0.0008 µg/m3) with distance of 200 m. Agro street is a road with more plants aside than those of Colombo street and Kesehatan street which very rare. The highest temperature of 37,8oC was found in Kesehatan street and the lowest was 29,5oC in Agro street. Besides, the highest humidity was found in Kesehatan street of 79,05% and the lowest was found in Colombo street of 60,95%. The highest wind velocity is found in Colombo street of 0,8 m/s and the lowest one was found in Agro street of 0,35 m/s. Lead concentration in these three locations, if it is correlated with quality standard of natural environment of 2 µg/m2, was categorized into low, i.e. below the quality standard allowed. Key words : Motor vehicle emission, air lead, air temperature, air humidity and wind velocity.
KINETIKA INTERAKSI ION Cr6+ DENGAN FITOPLANKTON LAUT (Tetraselmis chuii) Jayali, Ahmad Muchsin
Green Earth Vol 1, No 2 (2012)
Publisher : Green Earth

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Abstract

The research aimed to examine the ability of bioaccumulation of Cr6+ by marine phytoplankton Tetraselmis chuii as water bioindicators. The analysis method used was Atom Absorption Spectrophotometer (AAS). The results of research indicate that the optimum growth time of Tetraselmis chuii phytoplankton for 10 days with maximum cell density as big as 1.850.000 cells/mL phytoplankton. Maximum concentration ion  Cr6+  that can be tolerated (MTC) by Tetraselmis chuii  phytoplankton is 0.250 ppm. Bioaccumulation ion Cr6+ in marine phytoplankton Tetraselmis chuii follow  orde-1 mechanism with optimum time of 30 minutes at Tetraselmis chuii. intake constant velocity of k1 in a row is 0.0120/minutes. Constant release rate velocity of k2 in a raw is 0.0003/minutes. Key words : Kinetics, ion, chromium, T.chuii.

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