Gas 222Rn Sebagai Perunut Gas CO2 Dari Dalam Tanah

1. 222Rn occupies 40% of the universal radiation dose. On the other hand, CO2 is the main green house gas. Both gases are emanated togetherftom soil and affected by the environmental conditions. This research was conducted to study the emanation pattern of 222Rn and CO2 by the accumulation method and the use of of 222Rn as tracer gas for concentration change of CO2 emanated from soil. A top sealed plastic container was used as an accumulator and embedded into 20 cm depth soil. The influences of some environmental conditions that were air pressure, air temperature, air humidity, and soil temperature, on the emanation rate of both gases were also examined. 222Rn concentration was detected by a passive method portable radon monitor "AlphaGUARD" PQ-2000 at one-hour measurement interval. AlphaEXPERT" version 3.0 software was used to record the data from "AlphaGUARD" monitor. CO2 concentration in air was measured by an infrared method CO2 monitor TG-1300 A and recorded by Pegasus !NR-6041 recorder. This recorder was also used to record the soil temperature measured by a thermoelectric couple. The 222Rn and CO2 concentrations on the container fluctuate in the same pattern that are affected by the variation of air pressure and soil temperature. After the gases fulfilled the container, the back diffusion resulting in the decreasing of gases emanation rate occurs

Pengaruh panas terhadap blok semen hasil pemadatan limbah chrom dan stronsium yang diperkuat dengan fiber alami

Cementation of hazardous liquid waste is one of the methods to minimize its detrimental effect on the environmental quality and human health. This research purpose was to study the effect of temperature on the cement block reinforced by coconut (Cocos nucifera) fiber and bamboo (Bambusa vulgaris) fiber. This research was pursued by adsorbing stronsium waste and chrom using zeolite. 13% v/o of zeolite was mixed with 0,3 of water/cement ratio and 0,5% v/o of natural fiber. The cement blocks produced were heated at 27°C. 50°C, 100°C, 150°C, 200°C and 250°C for 10 minutes and then investigated their compressive strength and leaching rate. The hydration reaction completely works when cement block is heated until certain temperature that results in the increasing of its compressive strength. Over heated results in the decreasing of compressive strength due to the enlarging of pores between cement matrix and fiber. However, the compressive strength of cement block heated up to 250°C is still beyond the standard Based on its compressive strength, the bamboo (Bambusa vulgaris) fiber is more feasible than coconut (Cocos nucifera) fiber for reinforcing cement block Heating just influences on the physics properties of cement block But, the ability of block cement to immobilize a matter is affected by properties of matters

Imobilisasi sr-90 dalam zeolit dengan proses pemadatan semen-serat kelapa

The research purpose was to immobilize Sr-90 adsorbed by zeolite using cement and coconuts fiber. The research was pursued by varied % v/o of coconuts fiber and investigated their compressive strength, bending strength and leaching rate. The 13% v/o of zeolite was mixed with cement on 0.3 of water/cement weight ratio. The optimum composition of coconuts fiber causing increasing of mechanical strength has been founded at 0.50% v/o of fiber. The axial force resistance of fiber is higher than the radial one. The leaching rate of fiber reinforced mortar doesn\u27t significantly change. Key Words: Zeolite - cement and coconuts fibe

Pengaruh Suhu, Konsentrasi HNO3 dan NH4OH pada Aktivasi Arang Tempurung Kelapa sebagai Adsorben Radionuklida 131F dan 32 PO.4m.

The study focusses on influence of physical activation (temperature) and chemical activation (HNO3 concentration, NifiON concentration) on coconut charcoal capability to adsorp radionuclide 32P and 1311, in anionic form. The result indicated that physical activation (temperature) gives a significant decontamination factor meanwhile chemical activation (HNO3 and NH.,OH concentration) doesnot provide a significant decontamination factor. The best results is obtained if coconut charcoal is dried at 600\u27C and reacted with 1, 75 M HNO3. Keywords: Radionuclide, activation, dicontamination charcoal

Developing Nuclear Security Capacity of Indonesia’s Police and Security Officer: Lessons from Universitas Gadjah Mada’s Pilot Training

Due to an increase in global nuclear security issues, there need to be improvements in human resources and security measures. The Republic of Indonesia is an archipelago country, which makes surveilling for nuclear security threats complicated. Recent radioactive material smuggling incidents proved that Indonesian police and security officers’ knowledge in nuclear security has been challenged and must be improved. In response, Universitas Gadjah Mada’s Nuclear Engineering Program composed a three-day pilot training program for local police and UGM\u27s security officers in 2018. The objective of the training was to improve their capabilities in dealing with nuclear security issues around where they work and serve. Training materials were designed to introduce nuclear technology and provide the basic skills of handling nuclear security matters. The training was divided into 12 sessions, based on the needs stated by the Special Region of Yogyakarta\u27s police chief. Lessons were delivered through traditional teaching, table-top exercises, exercises, and discussion. Fifteen-question pre-tests and post-tests were conducted to assess the officers’ knowledge of the training materials and the benefits of being trained. Based on the tests, we concluded that the participants’ understanding of nuclear security had improved. This increase in understanding was because the training materials fit their job needs, presented in various methods, and the participants’ awareness grew. It led to an increase in their awareness for securing the facilities utilizing radioactive sources in the Yogyakarta area. They said that the number of trainees in this event still does not meet the number of facilities that have to be secured. Therefore, the training should be carried out again and can be improved based on the participants\u27 feedback. Furthermore, this training could be expanded and applied to the whole country

PENGARUH PANAS TERHADAP METODE SEMENTASI LIMBAH BAHAN BERACUN DAN BERBAHAYA YANG DIPERKUAT DENGAN FIBER ALAMI

Masalah pencemaran lingkungan yang diakibatkan oleh adanya peningkatan kegiatan industri telah menjadi perhatian masyarakat, khususnya adanya bahan beracun dan berbahaya dalam limbah cair industri. Limbah tersebut dapat mengakibatkan penurunan kualitas lingkungan yang akhirnya berdampak pada kesehatan manusia. Untuk meminimalisir pencemaran dari limbah cair, salah satu metode yang dapat dilakukan adalah dengan memadatkannya. Penelitian ini bertujuan untuk mengetahui kemampuan dari padatan hasil sementasi limbah bahan beracun dan berbahaya yang diperkuat dengan fiber lokal alami untuk menahan panas. Fiber yang digunakan berasal dari sabut kelapa (Cocos nucifera) dan batang bambu (Bambusa vulgaris). Penelitian dilakukan dengan menjerap limbah yang mengandung stronsium dan chrom dengan zeolit. Zeolit tersebut kemudian dicampur dengan semen dan fiber alami dengan komposisi rasio air/semen 0,3 serta 13% v/o zeolit dan 0,5% v/o fiber alami. Blok semen yang dihasilkan dipanaskan selama 10 menit. Pemanasan dilakukan pada suhu 00C, 500C, 1000C, 1500C, 2000C dan 2500C. Blok semen tersebut kemudian dilakukan uji tekan dan uji lindi. Pemanasan blok semen sampai pada suhu tertentu mengakibatkan reaksi hidrasi berjalan sempurna, sehingga kekuatan tekannya semakin besar. Pemanasan selanjutnya mengakibatkan munculnya rongga yang menyebabkan menurunnya kekuatan tekan. Meskipun demikian sampai dengan suhu 2500C, blok semen masih mempunyai kuat tekan di atas syarat minimal. Ditinjau dari aspek fisik, maka serat dari bambu (Bambusa vulgaris) lebih layak digunakan sebagai penguat daripada serat dari serabut kelapa sabut kelapa (Cocos nucifera). Pemanasan hanya berpengaruh terhadap sifat fisik blok semen, namun tidak mempengaruhi kekuatan penjerapan dan pengungkungan suatu unsur. Kemampuan blok semen yang diperkuat dengan fiber alami untuk mengungkung unsur-unsur yang berbeda dipengaruhi oleh sifat-sifat dari unsur-unsur tersebut

MODEL KONSEPTUAL SISTEM DETEKSI ANCAMAN KEAMANAN LIMBAH RADIOAKTIF TINGKAT SEDANG DI LAUT BANDA

An option of the placement of radioactive waste in sea for Indonesia is in the Banda Sea. The Banda Sea has a depth of ± 4,000 meters, in order to prevent for accessing the radioactive waste. The research was conducted to design a conceptual model of security threat detection system of intermediate level radioactive waste being placed in the Banda Sea. The conceptual model of threat detection systems was designed by modifying the conceptual model of ARG-US system. The potential national threat is terrorist action that has the potential for theft and sabotage of radioactive waste in the Banda Sea. The conceptual model of threat detection system was designed in the form of systems consisting of the label, the reader, the central database and the data access device. The label is affixed to the package of radioactive waste composed of sensors, memory and transmitters are used to transmit signals to the reader. The reader is placed on a tower near the Banda Sea surface composed of a transceiver and a data protocol processor. Transceiver functions to receive the signal transmitted by the transmitter�s label via acoustic waves and then the data protocol processor transmits the signal to the central database via the internet in the form of data packet seal status of radioactive waste. Central database is located in a region within 5 km from the surface of the Banda Sea. Database center operators have duties to assess and evaluate the status of the data packet seal radioactive waste. The data have been assessed and evaluated can be accessed from the passive software that has been installed on a computer, laptop or smartphone over the internet

Community Empowerment: Engineering Education Way in Gadjah Mada University to Elevate Nation Competitiveness and Innovation

The main purpose of educational institutions is the development of science for the progress of civilization. Therefore education is an integral part of society that is full of life issues that need to be resolved. This paper describes the role of engineering educational institutions, especially Gadjah Mada University, in assisting communities to resolve various issues in a very different situation from that encountered in developed countries. Gadjah Mada University, founded in 1949, known as a populist. This implies a big concern of the university in community development. In the field of engineering, this is expressed as three responsibilities: education, research and community development. This paradigm has recently shifted, however, from the community development to community empowerment. Based on identification of problems faced by micro, medium, and small enterprises, a relevant research is then conducted by the university. The result is then impelemented by the university along with the community and local/national government support. The implementation is not only in the form of technology injection, but also technology assistance in order to incubate their innovation ability. The results is the increasing of public understanding and utilization of technology to overcome their problems. As consequence, their competitiveness and innovations increase too due to the optimization of engineering education’s role in community empowerment

Proceedings of the 3rd International Conference on Community Engagement and Education for Sustainable Development

This proceeding contains articles on the various ideas of the academic community presented at The 3rd International Conference on Community Engagement and Education for Sustainable Development (ICCEESD 2022) organized by the Universitas Gadjah Mada, Indonesia on 7th-8th December 2022.  ICCEESD is a biannual forum for sharing, benchmarking, and discussing HEI’s activities in developing Education for Sustainable Development towards community engagement. Education for Sustainability as a teaching strategy for resolving community challenges through formal, informal, or non-formal education is expected to benefit from various community service best practices by academics, researchers, and students. The 3rd ICCEESD has “Strengthening Education for Sustainability Towards Better Community Engagement” as its theme this year. It is expected that the 3rd ICCEESD will provide a forum for the presenters and participants to exchange best practices, policies, and conceptual implementation of Education for Sustainability towards better community engagement and explore ideas to address community needs.  Conference Title: 3rd International Conference on Community Engagement and Education for Sustainable DevelopmentConference Theme: Strengthening Education for Sustainability Towards Better Community EngagementConference Acronyms: ICCEESD 2022Conference Date: 7th-8th December 2022Conference Location: Grand Rohan Jogja Yogyakarta, IndonesiaConference Organizer: Universitas Gadjah Mada, Indonesi