Jurnal Riset Fisika Indonesia

Pengukuran Kualitas Air Limbah Sawit Berdasarkan Baku Mutu Air Limbah Menggunakan AAS

Rusdianto Rusdianto — 2023-12-31

Palm oil industry waste is waste generated from the palm oil processing process. Palm oil liquid waste generally contains heavy metals, one of which is Cu and Zn. The presence of excessive Cu and Zn heavy metals can have a negative impact on living things and the surrounding environment. In this journal, the determination of the heavy metal content of Cu and Zn in palm oil wastewater was carried out using the AAS method with acetylene gas at a wavelength of 324.8 nm to determine the content of Cu metal content and at a wavelength of 213.9 nm to determine the Zn metal content. The results of determining the content of heavy metals Cu and Zn in sempel 1, 2 and 3 contained in palm oil wastewater which are still below the maximum limit of the quality standards obtained, namely less than 2 ppm for Cu metal and less than 5 ppm for Zn metal. utilized by living things and the surrounding environment.

Pengaruh Penambahan Karbon Aktif Dari Kulit Lada dan Suhu Aktivasi Karbon terhadap Nilai Konduktivitas Anoda Berbasis LTO

Jefri Akbar — 2023-12-31

Identifikasi Lapisan Akuifer Menggunakan Metode Geolistrik Resisitivitas Konfigurasi Dipole – Dipole Di Kelurahan Padang Mulya Kecamatan Koba

Reza Firdaus Fir Daus — 2023-12-31

Padang Mulya Village, Koba District is part of the Koba Groundwater Basin area. This area has the potential of abundant aquifer layers. An aquifer is a layer of rock that can store water in large quantities. However, the continued increase in exploration of the aquifer layer will result in damage to the aquifer environment. In this case it is necessary to identify the aquifer layers to determine the depth and lithology of the constituent rocks. The resistivity geoelectric method of the dipole-dipole configuration is the most sensitive geophysical method for identifying aquifer layers. Measurements were made on six tracks to obtain data variations on current strength and potential difference. From these data variations in apparent resistivity values will be obtained. 2D modeling of the apparent resistivity value using the backward modeling method is carried out on each track in order to obtain a 2D cross-section of the subsurface structure. The 2D section of each track has an aquifer layer with a depth of 0 meters to 20 meters and is composed of clay, loamy sand, rather dense gravel sand and sandstone.

Analisis Sifat Mekanik dan Permukaan pada Degradasi Plastik Konvensional

Ristika Oktavia Asriza — 2023-12-31

Currently, plastic waste that decomposes for a long time can damage the environment and natural ecosystems. therefore, an innovation was made to create an environmentally friendly plastic that decomposes faster in nature. The purpose of this research is to determine the degradation ability of environmentally friendly conventional biodegradable plastics. This research uses environmentally friendly conventional plastic materials. This plastic is degraded in 3 (three) ways, namely photodegradation (irradiation with UV C light), irradiation with sunlight, and biodegradation. Each degradation process lasts for 30 days. The research results showed that there was a decrease in the elongation at break value of plastic that had been degraded. This is caused by the breaking of bonds in the polymer chain. Apart from that, the plastic also experiences damage to its surface. This damage is characterized by cracks, the appearance of stains, and the appearance of mold or microorganisms on the plastic surface.

Analisis Data Angin Permukaan di Bandara Udara Depati Amir Pangkalpinang Menggunakan Metode Windrose

Dea Septika — 2023-12-31

Pangkalpinang is a city in the Bangka Belitung Islands that is close to the sea. This indicates that Pangkalpinang is influenced by land winds and sea breezes. The purpose of this study is to analyse the percentage of wind speed and maximum wind speed in Pangkalpinang City in each month. The data used were obtained from synoptic observations of the Depati Amir Class I Meteorological Station in Pangkalpinang from January to December from 2011 to 2020. The data obtained is processed using WRPLOT (Wind Rose Plots for Meteorological Data) software to determine the direction and magnitude of wind speed and produce wind pattern images in the form of wind rose diagrams. The results obtained show that the dominant wind blows from the Southeast (112 - 157°) with the highest wind speed of 1 - 4 knots with a percentage of 42.9%, while the maximum wind speed throughout 2011 - 2020 is 28 knots which occurred in the period January - December 2013. The results obtained show that the wind conditions at Depati Amir Airport Pangkalpinang are still safe for aircraft take-off and landing operations.

Green Synthesis Nanopartikel Karbon Aktif dari Limbah Tempurung Kelapa

Rena Aprilianti — 2023-12-31

Activated carbon from coconut shell waste is a porous solid that has a large surface area with high absorption capacity, making it an alternative for reducing levels of heavy metal ions in the air. Active carbon is made by carbonization and chemical activation, then SEM testing is carried out to see the morphology of the activated carbon and analyzed using ImageJ software. This research aims to determine the effect of chemical activation and no activation on the number of pores formed in activated carbon. From the results of research that has been carried out, there are more pores formed after carbon is activated compared to carbon without activation. This is because the carbon surface without activation is still covered by impurities. In addition, unactivated carbon and activated carbon from coconut shells have pore sizes that fall into the mesoporous category.